Which HALS is suitable for agricultural film?

Agricultural film requires strong UV protection together with resistance to pesticides, sulfur-containing chemicals and repeated outdoor exposure. High-molecular-weight HALS are commonly considered for long service life, but the final grade must be compatible with the film resin, thickness and agrochemical environment. Sulfur-resistant or less basic HALS may be needed in demanding greenhouse applications. Validation should include accelerated weathering and chemical-exposure testing.

Why can acidic pigments or flame retardants reduce HALS performance?

Conventional HALS contain basic amine functionality. Acidic pigments, halogenated flame-retardant systems, acidic fillers or certain catalyst residues can interact with or deactivate the HALS, reducing light-stabilization efficiency. In such formulations, formulators may consider less basic or NOR-type HALS, adjust the additive package, or use acid scavengers where appropriate. Compatibility testing is necessary because the interaction depends on the full formulation.

How do high-molecular-weight HALS differ from low-molecular-weight HALS?

Low-molecular-weight HALS generally disperse easily and can provide rapid stabilization, but they may be more prone to migration or extraction. High-molecular-weight or oligomeric HALS usually offer lower volatility, better extraction resistance and longer service life, which is valuable in films, fibres and outdoor articles. The best choice depends on polymer compatibility, article thickness, exposure conditions and contact with water, detergents or chemicals.

Are plastic additives suitable for food-contact or regulated applications?

Suitability depends on the exact additive grade, polymer, use level, food type, temperature and destination market. A general technical grade should not automatically be described as food-contact compliant. Buyers should define the applicable regulation and request supporting declarations, substance identity, purity data and migration or extraction information where required. SUNCHEM can check available documentation for a specific product and supplier, but the finished-material manufacturer remains responsible for confirming compliance of the final formulation and article.

Can UV absorbers and HALS be used together in the same plastic formulation?

Yes. UV absorbers and HALS are frequently used together because they protect the polymer through different mechanisms. The UV absorber reduces the amount of damaging radiation entering the material, while the HALS suppresses radical reactions caused by photo-oxidation. The optimum ratio depends on polymer type, article thickness, pigment system, outdoor exposure and service-life target. Compatibility must also be checked because acidic additives, certain pigments and some flame-retardant systems can reduce HALS effectiveness.

Can you provide COA, SDS/MSDS, and TDS?

Yes. COA, SDS and TDS are available for suitable products. Availability depends on the exact product, manufacturer, destination market and order stage. Additional declarations or test reports can be checked case by case after the buyer provides the product, application and regulatory requirements.

Can you supply both branded and custom specifications?

SUNCHEM supplies selected branded product lines and can evaluate custom specifications or alternative grades through qualified manufacturing partners. Feasibility depends on chemistry, volume, test methods, regulatory requirements and development cost. Custom products require technical review and sample approval before commercial supply.

Do you support long-term supply agreements?

Yes. SUNCHEM can support scheduled deliveries, annual-volume planning, specification management, quality documentation and supply-risk coordination for approved products. Commercial terms depend on forecast accuracy, product availability, payment terms and destination logistics.

Do you support samples?

Sample support is available for qualified evaluation projects, subject to product type, supplier policy, quantity, destination and shipping restrictions. Please provide the product or CAS number, target application, required quantity and courier details. Hazardous or restricted products may require additional review.

How can additive migration, blooming or plate-out be reduced?

Migration and blooming usually occur when an additive has limited compatibility with the polymer, is used above its solubility limit, or is exposed to heat over time. Plate-out may also result from volatility, decomposition or interaction with lubricants and other formulation components. These problems can often be reduced by choosing a higher-molecular-weight or polymeric grade, lowering dosage, improving dispersion and checking the complete additive package. Processing temperature, cooling conditions and storage tests should be included in the evaluation.

How do I choose an antioxidant package for PP, PE, ABS or engineering plastics?

Start with the polymer, processing temperature, residence time, expected service temperature and required regulatory status. PP and PE commonly use a hindered phenolic antioxidant together with a phosphite, while long-term heat ageing may require a thioester synergist. ABS and engineering plastics may need additives with higher thermal stability, lower volatility or better colour control. Other formulation components, including pigments, fillers, recycled resin and flame retardants, can change the required package. The final formulation should therefore be validated by melt-flow, colour, oven-ageing and application-specific testing.

How do I request a quotation?

Send the product name or CAS number, required specification, quantity, application, destination port, preferred Incoterm and documentation requirements. These details allow SUNCHEM to confirm a suitable supply source, packaging, lead time and freight basis before issuing a quotation.

How do I select a halogen-free flame retardant for a plastic application?

Selection begins with the polymer and the required fire standard, such as a target UL 94 rating, limiting oxygen index or smoke requirement. Phosphorus-based systems are commonly considered for PC/ABS, epoxy and intumescent polyolefin applications; melamine-based products are used in selected polyamides; and mineral flame retardants such as aluminum hydroxide or magnesium hydroxide require relatively high loadings. Mechanical properties, processing temperature, moisture sensitivity, electrical performance and colour must be evaluated together with flame resistance. A material described as halogen-free should also be checked against the customer's specific regulatory or test definition.

How much plastic additive should be used in a formulation?

There is no universal dosage. Antioxidants, UV stabilizers and flame retardants have very different use levels, and the effective concentration depends on the polymer, processing history, product thickness, exposure conditions and performance target. Supplier starting ranges can be used for initial trials, but the lowest-cost formulation is not always the lowest dosage because synergistic combinations may perform better. Final dosage should be established through laboratory compounding and tests such as colour, melt-flow retention, oven ageing, weathering and the required flammability standard.

What are the main types of plastic additives and what does each type do?

Plastic additives are selected according to the degradation or processing problem that must be controlled. Primary antioxidants interrupt oxidation reactions, while secondary antioxidants decompose hydroperoxides formed during processing. UV absorbers absorb harmful ultraviolet energy, and hindered amine light stabilizers (HALS) slow photo-oxidation. Flame retardants reduce ignition or flame spread, while processing aids, lubricants, nucleating agents and other specialty additives improve manufacturing or end-use performance. The correct package depends on the polymer, processing temperature, service environment and regulatory requirements.

What information is needed to recommend the right plastic additive?

Please provide the polymer type and grade, processing method and maximum processing temperature, existing formulation, problem to be solved, target service life, exposure conditions, required test standard and destination-market compliance needs. For replacement projects, include the current additive name, dosage and performance gap. This information allows a supplier to compare suitable antioxidant, light-stabilizer, UV-absorber or flame-retardant options and reduces unnecessary trial work.

What is the difference between UV absorbers and HALS light stabilizers?

UV absorbers protect polymers by absorbing ultraviolet radiation and converting it into less harmful energy. HALS do not mainly absorb UV light; instead, they interrupt the photo-oxidation cycle and regenerate during the stabilization process. UV absorbers are especially useful where sufficient material thickness allows effective absorption, while HALS are highly effective in many outdoor plastics, coatings and thin articles. In demanding applications, a UV absorber and a HALS are often combined to improve colour retention, gloss and mechanical-property retention.

What is the difference between plastic additives and masterbatch?

A plastic additive is the functional chemical itself, while a masterbatch is a concentrated mixture of additives or pigments dispersed in a carrier resin. Masterbatch can simplify dosing, reduce dust and improve dispersion, but the carrier and active-content level must be compatible with the final polymer and process.

What is the difference between primary and secondary antioxidants for plastics?

Primary antioxidants, commonly hindered phenols, donate hydrogen to free radicals and help stop the oxidation chain reaction during processing and service life. Secondary antioxidants, such as phosphites and thioesters, decompose hydroperoxides before they generate additional radicals. They are often used together because the combination provides better processing stability and longer-term heat ageing protection than either type alone. Selection and dosage should be confirmed through formulation trials because polymer type, temperature and exposure conditions strongly affect performance.

What plastic additives does SUNCHEM supply?

SUNCHEM supplies antioxidants, light stabilizers, UV absorbers, flame retardants, optical brighteners, polymerization inhibitors and selected processing additives from qualified Chinese manufacturers. Core product lines include SUNNOX® antioxidants, SUNLIGHT® HALS, SUNSORB® UV absorbers and SUNFR® flame retardants. Availability, specification and documentation depend on the exact grade and intended application.

Can SUNCHEM support equivalent-grade evaluation for branded plastic additives?

SUNCHEM can help screen Chinese supply options against the buyer's target specification, application and documentation requirements. Equivalent-grade evaluation should compare chemical identity, active content, physical properties, impurity profile and performance in the customer's formulation. A proposed alternative should not be treated as automatically interchangeable; sampling and application testing remain necessary before commercial approval.

How can buyers compare plastic additive suppliers beyond price?

Compare product identity, test methods, batch consistency, impurity profile, colour, volatility, packaging, documentation, production capacity and change-control practices. Also evaluate whether the supplier understands the application, can support samples and complaints, and can maintain supply during raw-material or logistics disruptions. A lower unit price may create higher total cost if quality variation causes production loss or reformulation.

How should plastic additives be stored and what affects shelf life?

Most plastic additives should be kept in unopened original packaging in a cool, dry, well-ventilated area away from heat, direct sunlight and moisture. Liquid phosphites and hygroscopic products may require tighter moisture control, while powders should be protected from contamination and caking. Shelf life depends on the exact grade, packaging and storage conditions, so the supplier's product-specific recommendation should be followed.

What documents should be checked when sourcing plastic additives from China?

Buyers should review the current specification, recent COA, SDS, TDS, manufacturing origin, packaging, shelf life and any required regulatory declarations. For sensitive applications, confirm test methods, impurity limits, registration status, food-contact support, RoHS or REACH information and change-control procedures. Documents should match the exact grade and manufacturer rather than a generic product name.

How can yellowing caused by antioxidant degradation be reduced?

Yellowing can result from excessive processing temperature, long residence time, an unsuitable antioxidant package, interactions with pigments or flame retardants, or contamination in recycled resin. It can often be reduced by improving temperature control, using a more hydrolytically stable phosphite, balancing primary and secondary antioxidants, and checking additive purity and compatibility. Comparative colour testing after extrusion and heat ageing is essential before changing the formulation.

What is the difference between Antioxidant 1010 and Antioxidant 1076?

Antioxidant 1010 is a high-molecular-weight hindered phenolic antioxidant with very low volatility and is widely used in polyolefins, engineering plastics, elastomers and adhesives. Antioxidant 1076 is also a hindered phenol, but it has a lower molecular weight and can offer easier incorporation in some polymer systems. Both provide long-term thermal oxidation protection. The preferred grade depends on polymer type, processing temperature, volatility requirements, colour target and the other stabilizers in the package.

When should DSTDP or DLTDP be added to an antioxidant package?

DSTDP and DLTDP are thioester secondary antioxidants used mainly when long-term heat-ageing performance is important. They are commonly combined with hindered phenolic antioxidants in polyolefins, wire and cable compounds, automotive parts and other applications exposed to elevated temperatures. They are less focused on initial colour than phosphites and more focused on extended thermal stability. Compatibility, odour, extraction resistance and regulatory requirements should be checked for the final application.

Why are Antioxidant 1010 and Antioxidant 168 often used together?

Antioxidant 1010 is a primary antioxidant that interrupts free-radical oxidation, while Antioxidant 168 is a phosphite secondary antioxidant that decomposes hydroperoxides formed during processing. Using them together provides complementary protection against melt-processing degradation and longer-term ageing. The ratio should be optimized for the polymer, processing temperature, recycled content, colour requirements and expected service life.

Do UV absorbers affect the colour or transparency of plastics?

A properly selected UV absorber normally has limited effect on visible transparency at recommended use levels, but some grades can contribute a slight initial colour or haze, especially at higher dosages or in very clear articles. Dispersion, additive purity, polymer compatibility and processing temperature all influence appearance. Transparent applications should be evaluated using haze, yellowness index and light-transmission measurements.

What is the difference between UV Absorber 326 and UV Absorber 327?

Both are benzotriazole UV absorbers used to protect polymers from ultraviolet degradation. Their differences in molecular structure affect absorption profile, volatility, thermal stability, compatibility and performance in specific polymers. UV 326 is commonly used in polyolefins, PVC, ABS and coatings, while UV 327 may be selected where lower volatility or different compatibility is required. Direct substitution should be confirmed through formulation and weathering tests.

Which UV absorber is suitable for polyolefin films and outdoor plastic products?

The choice depends on polymer type, film thickness, required service life, processing temperature and the presence of pigments or fillers. Benzotriazole UV absorbers are widely used because of their broad UV absorption and thermal stability. Thin films often benefit from a combined package containing both a UV absorber and a HALS. Final selection should be validated through accelerated weathering and outdoor exposure testing.

How do high-molecular-weight HALS differ from low-molecular-weight HALS?

Low-molecular-weight HALS generally disperse easily and can provide rapid stabilization, but they may be more prone to migration or extraction. High-molecular-weight or oligomeric HALS usually offer lower volatility, better extraction resistance and longer service life, which is valuable in films, fibres and outdoor articles. The best choice depends on polymer compatibility, article thickness, exposure conditions and contact with water, detergents or chemicals.

Which HALS is suitable for agricultural film?

Agricultural film requires strong UV protection together with resistance to pesticides, sulfur-containing chemicals and repeated outdoor exposure. High-molecular-weight HALS are commonly considered for long service life, but the final grade must be compatible with the film resin, thickness and agrochemical environment. Sulfur-resistant or less basic HALS may be needed in demanding greenhouse applications. Validation should include accelerated weathering and chemical-exposure testing.

Why can acidic pigments or flame retardants reduce HALS performance?

Conventional HALS contain basic amine functionality. Acidic pigments, halogenated flame-retardant systems, acidic fillers or certain catalyst residues can interact with or deactivate the HALS, reducing light-stabilization efficiency. In such formulations, formulators may consider less basic or NOR-type HALS, adjust the additive package, or use acid scavengers where appropriate. Compatibility testing is necessary because the interaction depends on the full formulation.

Can flame retardants reduce mechanical properties or processing stability?

Yes. High flame-retardant loading can reduce impact strength, elongation, flow or surface quality, while some products may be moisture-sensitive or thermally unstable at the polymer processing temperature. Proper particle size, surface treatment, dispersing conditions and synergists can reduce these effects. Flame performance must be balanced with mechanical, electrical and processing requirements rather than optimized in isolation.

How do ATH and magnesium hydroxide flame retardants differ?

Both are halogen-free mineral flame retardants that release water endothermically and can reduce smoke. Aluminum hydroxide decomposes at a lower temperature and is commonly used in EVA, thermosets, cable compounds and construction materials processed below its decomposition range. Magnesium hydroxide has higher thermal stability and is more suitable for polymers processed at higher temperatures. Both often require relatively high loading, so particle size, surface treatment and mechanical-property retention are important.

What halogen-free flame retardants do you offer?

Available halogen-free options may include phosphate esters such as BDP and RDP, ammonium polyphosphate, melamine-based systems, DOPO derivatives, aluminum hydroxide and magnesium hydroxide. Selection depends on the polymer, processing temperature, target fire rating, smoke requirements and mechanical-property limits. Regulatory status must be confirmed for the exact product and supply chain.

What information is required to select a flame retardant for UL 94 testing?

Provide the polymer and grade, target UL 94 rating, test thickness, processing temperature, colour, mechanical-property requirements, electrical requirements and any halogen-free or smoke restrictions. It is also important to identify fillers, pigments, glass fibre and other additives because they can change flame performance. A supplier can suggest a starting system, but the finished compound must be tested by the responsible manufacturer or an accredited laboratory.

What is DOPO used for?

DOPO is a reactive phosphorus-containing flame-retardant intermediate used in epoxy resins and other thermosetting systems, including selected electronic laminates, encapsulants and composite applications. It is often used to introduce phosphorus into the polymer structure, but formulation and curing performance must be validated in the final resin system.

What is TBBPA and where is it used?

TBBPA, or tetrabromobisphenol A, is a brominated flame retardant used mainly as a reactive component in epoxy resins for printed circuit board laminates and, in some applications, as an additive in polymers such as ABS. The suitable grade and use level depend on the resin system, target fire standard and destination-market requirements.

What is the difference between reactive and additive flame retardants?

Reactive flame retardants chemically bond into the polymer or resin network during manufacture, which can reduce migration and improve permanence. Additive flame retardants are physically blended into the polymer and are generally easier to formulate across different materials. Reactive systems are common in selected epoxy, polyurethane and unsaturated polyester applications, while additive systems are widely used in thermoplastics. The choice affects processing, mechanical properties, recyclability and regulatory performance.

Can too much optical brightener cause colour problems?

Yes. Excessive dosage may produce a bluish or greenish cast, uneven colour, fluorescence saturation or migration. The optimum level is often low and depends on the base resin, pigments, fillers and article thickness. Dosage should be established by colour measurement and visual comparison under relevant lighting.

How do I choose an optical brightener for plastics?

Selection depends on polymer compatibility, processing temperature, colour target, migration resistance and required transparency. A brightener suitable for PVC may not be ideal for high-temperature engineering plastics. Comparative trials should evaluate dosage, whiteness, hue, thermal stability and long-term colour retention.

What is an optical brightener and how does it improve polymer appearance?

An optical brightener absorbs ultraviolet light and re-emits part of it as blue visible light, reducing the visual effect of yellowing and making white or light-coloured plastics appear brighter. It does not remove the underlying cause of degradation, so antioxidant and light-stabilizer packages may still be required.

How do nucleating agents affect polypropylene performance?

Nucleating agents promote faster and more uniform crystallization in polypropylene. They can shorten moulding cycles and improve stiffness, dimensional stability or clarity depending on the grade. Performance depends on resin type, cooling conditions, dosage and dispersion.

What do processing aids do in plastic manufacturing?

Processing aids can improve melt flow, fusion, dispersion, surface finish, release or throughput. Their function depends on the polymer and process. They may reduce melt fracture in extrusion, improve PVC fusion, assist filler dispersion or lower equipment deposits. Selection must consider downstream properties and possible migration.

What is the difference between internal and external lubricants in plastics?

Internal lubricants reduce friction within the polymer melt and can improve flow, while external lubricants reduce adhesion between the polymer and metal processing surfaces. Many formulations require a balance of both. Excess lubricant can reduce fusion, printing, bonding or mechanical properties, so dosage should be optimized experimentally.

Can polymerization inhibitor concentration decrease during storage?

Yes. Inhibitors can be consumed by oxygen, radicals, contaminants, heat or light over time. Long storage, elevated temperature and poor circulation may create uneven inhibitor levels. Users should follow product-specific monitoring, temperature-control and replenishment procedures and should not rely only on the original loading concentration.

How should a polymerization inhibitor be selected for monomers?

Selection starts with the monomer chemistry, process temperature, oxygen availability, storage duration and downstream polymerization method. Some inhibitors require dissolved oxygen to work effectively, while others are used for high-temperature processing or emergency protection. Removal or residual-inhibitor requirements must also be considered.

What is the purpose of a polymerization inhibitor?

A polymerization inhibitor slows or prevents unwanted polymerization during manufacture, storage and transport of reactive monomers. It helps reduce heat generation, viscosity increase, gel formation and equipment fouling. The inhibitor type and concentration must match the monomer, oxygen level, storage temperature and expected holding time.

Can plastic additives be used in recycled polymers?

Yes. Recycled polymers often require restabilization because previous processing and service life have consumed part of the original additive package. Antioxidants, compatibilizers, odour-control products, chain extenders or light stabilizers may be considered. The correct package depends on contamination, degradation level and target application.

Perguntas frequentes

Qual HALS é adequado para filme agrícola?

Por que os pigmentos ácidos ou retardadores de chama podem reduzir o desempenho do HALS?

Como os HALS de alto peso molecular diferem dos HALS de baixo peso molecular?

Junho 30, 2026

Como os antioxidantes melhoram a estabilidade do polímero

Casa | Tópicos |

Por que os polímeros se degradam por oxidação

A oxidação do polímero segue uma reação em cadeia. Aquecer, Radiação UV, tesoura mecânica, ou contaminação por metais gera radicais livres. Estes reagem com o oxigênio para formar radicais peróxidos, que continuam a cadeia. Sem antioxidantes, isso leva ao amarelecimento, fragilização, mudanças no fluxo de fusão, e degradação da superfície.

Antioxidantes Primários: Catadores Radicais

Antioxidantes fenólicos prejudicados (Antioxidante 1010, 1076, 1098) doar átomos de hidrogênio para radicais peróxi, convertendo-os em moléculas estáveis e quebrando a reação em cadeia. Eles são a primeira linha de defesa contra a degradação oxidativa.

Antioxidantes Secundários: Decompositores de hidroperóxidos

Os antioxidantes secundários tratam dos hidroperóxidos – os principais intermediários que reiniciam as cadeias radicais se não forem controlados:

Fosfitos (Antioxidante 168): Ação rápida em altas temperaturas de fusão, excelentes estabilizadores de processamento
Tioésteres (DSTDP, DLTDP): Proteção econômica contra o envelhecimento térmico a longo prazo

Sistemas Sinérgicos

Antioxidante 1010 + 168: Sistema de poliolefina mais utilizado
Antioxidante 1010 + DSTDP: Estabilização econômica de longo prazo em PP/PE
Antioxidante 1010 + 168 + HALS: Estabilização total para aplicações externas

Seleção Específica de Polímero

PP: 1010 + 168 em 0,1–0,3% combinado
Educação Física: Sistemas combinados; confirmar por testes da OIT para aplicações de tubos/geomembranas
Plásticos de engenharia: Classes estáveis a 250–300°C (Antioxidante 168 é fundamental nessas temperaturas)

Perguntas frequentes

Os antioxidantes fornecem proteção UV?
Não. Os antioxidantes tratam apenas da degradação oxidativa térmica. Para aplicações externas, Absorventes UV e estabilizadores HALS devem ser adicionados separadamente.

Entre em contato com a SUNCHEM

A equipe da SUNCHEM pode ajudar a recomendar o sistema antioxidante certo para seu polímero e aplicação. Contate-nos para suporte técnico e amostras.

Artigo escrito porEquipe Editorial da SUNCHEM

Dimensão de comparação	Antioxidante 1010	Antioxidante 168
Papel Químico	Antioxidante primário (tipo fenólico prejudicado) — doa átomos de hidrogênio para interromper a cadeia radical oxidativa.	Antioxidante secundário (tipo fosfito) — reduz os hidroperóxidos a estáveis, álcoois não reativos.
Mecanismo de Função	Eliminação de radicais livres – quebra a reação em cadeia na fase de propagação.	Decomposição de hidroperóxidos – remove intermediários reativos antes que gerem novos radicais.
Função de proteção de polímero	Protege contra a degradação termo-oxidativa a longo prazo ao longo da vida útil do polímero.	Protege contra a degradação na fase de processamento – descoloração induzida por calor e cisalhamento e perda de propriedade.
Estabilidade de Processamento	Contribui com proteção moderada durante o processamento; força primária é a estabilização a longo prazo.	Fornece forte estabilidade na fase de fusão – retenção de cor e controle de viscosidade durante extrusão e moldagem.
Estabilidade a longo prazo	Fornece forte estabilidade termo-oxidativa de longo prazo durante toda a vida útil do produto.	Estabilidade limitada a longo prazo por si só; mais forte quando combinado com um antioxidante primário.
Aplicações Típicas	Polipropileno, polietileno, plásticos de engenharia, fibras, filmes - estabilização térmica de uso geral a longo prazo.	Mesmas famílias de polímeros de base, aplicado especificamente na composição, extrusão, e estágios de moldagem.
Cenários de uso comuns	Usado sozinho onde as condições de processamento são moderadas e a resistência ao envelhecimento térmico a longo prazo é a prioridade.	Raramente usado sozinho; normalmente combinado com um antioxidante primário como parte de um pacote de estabilização sinérgica.

Nome do produto	Antioxidante 168 (Tris(2,4-di-terc-butilfenil) fosfito)
Marca	SUNNOX® 168
Nº CAS.	31570-04-4
Categoria Química	Antioxidante Secundário (Fosfito) / Aditivo Plástico
Função principal	Decompõe hidroperóxidos formados durante o processamento de polímeros, protegendo a estabilidade do processamento e a retenção de cor
Formulários	Poliolefinas, plásticos de engenharia, filme & extrusão de fibra, composição & lote mestre, polímeros em contato com alimentos — veja lista completa abaixo

Nº CAS.	31570-04-4
Fórmula química	C42H63O3P
Sinônimos Químicos	Irgafos® 168; Irganox® 168; Songnox® 1680; Hostanox PAR 24; Apunhalada ADK 2112; Alcanox 240; Tris(2,4-di-terc-butilfenil) fosfito — lista completa de sinônimos disponível mediante solicitação

Ponto de fusão	181–184 °C (aceso.)
Ponto de ebulição	594.2 °Gato 760 mmHg
Ponto de inflamação	394 °C
Aparência	Confirmação pendente do SUNCHEM — forma comercial típica (por exemplo. pó/grânulo) a ser confirmado em relação ao grau de origem real
Recomendação de armazenamento	Confirmação pendente do SUNCHEM — antioxidantes fosfito são geralmente sensíveis à umidade/hidrólise; temperatura específica de armazenamento e dados de prazo de validade a serem confirmados

Tipo antioxidante	Secundário (fosfito), decompositor de hidroperóxido
Emparelhamento Comum	Frequentemente combinado com um antioxidante fenólico primário — por exemplo. Antioxidante 1010 — para proteção sinérgica
Dosagem	Confirmação pendente do SUNCHEM — varia de acordo com o polímero e o processo; entre em contato com a equipe técnica da SUNCHEM para obter orientação específica para sua aplicação

	Antioxidante 168 (SUNNOX® 168)	Antioxidante 1010 (SUNNOX® 1010)
Nº CAS.	31570-04-4	6683-19-8
Tipo	Antioxidante secundário (fosfito)	Antioxidante primário (fenólico impedido)
Mecanismo	Decompositor de hidroperóxido	Eliminador de radicais livres
Função principal	Estabilidade de processamento em alta temperatura	Proteção termo-oxidativa de longo prazo
Muitas vezes combinado com	Antioxidante 1010 (veja certo)	Antioxidante 168 (veja à esquerda)

Produto	Nº CAS.	Filial	Mecanismo	Melhor para
Antioxidante 1010	6683-19-8	Primário	Eliminador de radicais	Escolha principal padrão; poliolefina ampla / uso de plástico de engenharia	Visualizar →
Antioxidante 1076	2082-79-3	Primário	Eliminador de radicais	Ponto de fusão mais baixo (50–52°C) — manuseio/dispersão mais fácil em alguns processos	Visualizar →
Antioxidante 168	31570-04-4	Secundário	Decompositor de hidroperóxido	Estabilidade de processamento em alta temperatura	Visualizar →
DSTDP	693-36-7	Tioéster	Decompositor de hidroperóxido	Envelhecimento térmico de longo prazo com boa relação custo-benefício	Visualizar →
DLTDP	123-28-4	Tioéster	Decompositor de hidroperóxido	Alternativa paraDSTDP, comprimento de corrente diferente	Visualizar →

Nome do produto	Antioxidante 1010 (Pentaeritritol Tetrakis[3-(3,5-Di-terc-butil-4-hidroxifenil)propionato])
Marca	SUNNOX® 1010
Nº CAS.	6683-19-8
Categoria Química	Antioxidante Primário Fenólico Impedido / Aditivo Plástico
Função principal	Evita a degradação oxidativa durante o processamento e a vida útil a longo prazo
Formulários	Poliolefinas, plásticos de engenharia, PVC & borracha, polímeros em contato com alimentos, fibras & filme, adesivos – veja a lista completa abaixo

Densidade	1.077 g/cm³
Ponto de ebulição	1005.8°C em 760 mmHg
Ponto de fusão	115–118ºC (dezembro)
Ponto de inflamação	247.3°C
Índice de refração	1.535
Forma	Organizado
pKa	11.71 ± 0.40 (Previsto)
Temperatura de armazenamento	2–8°C

Tipo antioxidante	Primário (fenólico impedido), eliminador de radicais livres
Emparelhamento Comum	Frequentemente combinado com antioxidantes secundários (por exemplo. Antioxidante 168) para proteção sinérgica
Dosagem	Varia de acordo com o polímero e o processo — entre em contato com a equipe técnica da SUNCHEM para obter orientação específica para sua aplicação

Perguntas frequentes

Produtos e soluções

CDMA

Produtos Químicos Especiais

Polímeros e Materiais

Farmacêutico e Intermediários

Intermediários Farmacêuticos

Nutracêuticos

Como os antioxidantes melhoram a estabilidade do polímero

Por que os polímeros se degradam por oxidação

Antioxidantes Primários: Catadores Radicais

Antioxidantes Secundários: Decompositores de hidroperóxidos

Sistemas Sinérgicos

Seleção Específica de Polímero

Perguntas frequentes

Entre em contato com a SUNCHEM

Antioxidante 1010 versus Antioxidante 168: Diferenças, Funções, e quando usá-los juntos

Antioxidantes Primários vs Secundários

Antioxidante 1010 versus Antioxidante 168 Tabela de comparação

Explicação do Mecanismo Técnico

Antioxidante 1010 - Antioxidante Primário

Antioxidante 168 – Antioxidante Secundário

Por que antioxidante 1010 e 168 Trabalhe Juntos

Antioxidante Primário (1010)

Antioxidante Secundário (168)

= Sistema Combinado

Guia de decisão do comprador

Escolha Antioxidante 1010

Escolha Antioxidante 168

Escolha um sistema de combinação

Formulários

Polipropileno (PP)

Polietileno (Educação Física)

Plásticos de Engenharia

Processamento de Polímeros (Em geral)

Por que fonte SUNCHEM

produtos relacionados

Antioxidante 1010

Antioxidante 168

Centro de Conhecimento Antioxidante

Perguntas frequentes

Qual é a diferença entre Antioxidante 1010 e antioxidante 168?

Devo usar antioxidante 1010 ou Antioxidante 168?

Pode antioxidante 1010 e antioxidante 168 ser usado junto?

Como os antioxidantes primários e secundários funcionam juntos?

Precisa de ajuda para escolher o sistema antioxidante certo?

Antioxidante 168 (SUNNOX® 168) — Antioxidante Secundário para Estabilidade de Processamento

Informações resumidas do produto

Visão geral do produto

O QUE É ANTIOXIDANTE 168?

POR QUE É USADO?

QUE DESAFIOS OS COMPRADORES ENFRENTAM SEM ISSO?

COMO ISSO AJUDA OS FABRICANTES DE POLÍMEROS?

Especificações Técnicas

INFORMAÇÕES QUÍMICAS

PROPRIEDADES

NOTAS DE APLICAÇÃO

Formulários & Indústrias atendidas

Poliolefinas (Educação Física / PP)

Plásticos de Engenharia (PA, BICHO DE ESTIMAÇÃO)

Filme & Extrusão de Fibra

Composição & Masterbatch

Embalagem de polímero para contato com alimentos

Por que antioxidante 168 É usado com antioxidante 1010

Comparação / Equivalentes — Antioxidante 168 versus Antioxidante 1010

Por que fonte antioxidante 168 De SUNCHEM

Seleção de Produtor Qualificado

Qualidade & Suporte a Documentos

Exportar & Coordenação Logística

Soluções de fornecimento flexíveis

Gestão de suprimentos de longo prazo

Processo da Cadeia de Fornecimento SUNCHEM

Documentos & Qualidade

Documentos Públicos

Documentos Controlados

Embalagem, Quantidade mínima & Logística

Embalagem

Quantidade mínima & Tempo de espera

Exportar & Envio

Perguntas frequentes