Frequently Asked Questions

Common questions about sourcing, compliance and documentation across our product range.

What is the difference between C5/C9 and C9 petroleum resin?+

C5/C9 copolymer petroleum resins combine aliphatic and aromatic feedstocks and are selected for a balance of colour, compatibility, adhesion and softening point. C9 aromatic petroleum resins generally offer stronger aromatic compatibility and may have different colour and thermal characteristics. Performance varies significantly by grade, hydrogenation level and application, so supplier data and formulation trials should be compared.

What PA grades does SUNCHEM supply?+

SUNCHEM can source selected PA6 and PA66 grades for injection moulding, extrusion, fibre and other applications. Available viscosity, additive package, reinforcement, colour and packaging depend on the manufacturer and grade. Buyers should provide the processing method and target properties before grade selection.

Are your food additives suitable for EU and US market use?+

Suitability must be confirmed for the exact ingredient, grade, manufacturer, intended use and destination market. SUNCHEM can provide available specifications and supporting documents and can check whether a product is supplied against relevant EU, US FDA, FEMA, FCC or other requirements. Final regulatory approval and permitted use level remain the responsibility of the finished-product manufacturer and importer.

What is Zinc Pyrithione used for?+

Zinc pyrithione is an antimicrobial ingredient used in certain industrial and formulated-product applications. Permitted uses vary significantly by country and product category, and some former cosmetic uses are restricted in certain markets. Buyers must confirm the intended application, local regulatory status and required grade before sourcing.

How long does delivery take for paint and pigment chemicals from China?+

Lead time depends on production availability, quality approval, packaging, dangerous-goods booking, destination and shipping method. SUNCHEM confirms an estimated production and transit schedule for each quotation rather than applying one standard delivery time to all products.

What organic solvents does SUNCHEM supply from China?+

SUNCHEM supplies selected solvents and fine-chemical intermediates, including products used in coatings, adhesives, cleaning, extraction and chemical synthesis. Because the current category includes both true solvents and specialty intermediates, buyers should search by product name or CAS number and confirm specification, hazard class and application requirements.

Are paint and pigment chemicals REACH or RoHS compliant?+

Compliance must be checked for the exact substance, manufacturer, tonnage band, use and destination market. SUNCHEM can request available REACH, RoHS or other regulatory documentation from the selected source, but no category-wide compliance statement should be assumed.

Can you provide COA, SDS and TDS for paint and pigment chemicals?+

COA and SDS are generally available for suitable products, while TDS and additional analytical documents depend on the exact grade and manufacturer. Documentation should be confirmed before order placement, especially where impurity, colour strength, regulatory or application-specific data are critical.

What is HEDP used for in water treatment?+

HEDP is a phosphonate used as a scale and corrosion inhibitor in industrial water systems. It can help control deposits involving calcium salts and metal ions and is used in applications such as cooling-water treatment, boilers and certain cleaning formulations. Performance depends on water chemistry, pH, temperature and the complete treatment program.

Are your hair dye intermediates compliant with EU cosmetics requirements?+

Compliance depends on the exact substance, impurity profile, permitted use, concentration and current destination-market rules. SUNCHEM can provide available specifications and analytical information for evaluation, but the formulator and responsible person must confirm that the finished cosmetic product meets applicable regulations.

What water treatment chemicals does SUNCHEM supply?+

SUNCHEM can supply selected scale and corrosion inhibitors, biocides, disinfectants, coagulants and other water-treatment chemicals, including phosphonates, isocyanurates and selected brominated or non-oxidizing biocides. Availability and permitted use depend on the exact product, application and destination-market regulations.

Are your amino acids food grade or pharmaceutical grade?+

Selected amino acids may be available in food, feed, nutraceutical or pharmaceutical grades. The applicable monograph, assay, microbiological limits, endotoxin requirements and supporting certificates depend on the exact product and manufacturer. Buyers should specify the intended use and required FCC, USP, EP, JP or other standard before quotation.

What types of paint and pigment chemicals does SUNCHEM supply?+

SUNCHEM supplies selected dye and pigment intermediates, aromatic amines, aminophenols, resorcinol derivatives and other specialty chemicals used in coatings, inks, textile dyes and colourant manufacturing. Buyers should provide the exact product or CAS number because end-use suitability and regulatory requirements vary widely.

What documentation is provided with pharmaceutical intermediates?+

Available documentation may include a specification, recent COA, SDS, TDS and selected analytical or impurity information for the exact product and manufacturer. Additional items such as residual-solvent data, elemental-impurity information, REACH status or regulatory support must be confirmed case by case according to the intermediate, manufacturing site and destination market.

Which carbapenem antibiotics are available?+

Carbapenem API availability must be confirmed individually because manufacturing authorization, sterile-processing requirements, patent or market restrictions and regulatory documentation vary by product and destination. Please provide the exact API, grade, quantity and target market for a source review.

Are your APIs sourced from GMP-certified manufacturers?+

GMP status must be verified for the exact API, manufacturing site and destination market. For suitable projects, SUNCHEM can screen manufacturers and provide available GMP certificates, regulatory documents and audit-related information subject to confidentiality and supplier approval. Buyers should complete their own regulatory and quality qualification before commercial use.

What antiretroviral APIs can SUNCHEM source?+

Availability of antiretroviral APIs depends on the product, manufacturing authorization, destination market, regulatory status and current supply conditions. Buyers should provide the INN, required pharmacopoeial standard, quantity, market and dossier requirements so that SUNCHEM can confirm whether an appropriate source is available.

Frequently Asked Questions

Polymers & Materials

Rubber Additives Supplier from China

SUNCHEM supplies high-purity rubber additives — vulcanization accelerators, antioxidants, antidegradants, and processing aids — for tire manufacturing, industrial rubber goods, footwear, and automotive sealing applications.

N S SH VULCANIZATION Rubber Accelerator Chemistry
20+
Years in Chemical Supply
45+
Export Markets Worldwide
17
Rubber Additive Products
DOCS
COA / SDS / TDS Available

Global Rubber Additives Market

The global rubber additives market is valued at over USD 5 billion, driven by growing tire production in Asia, expanding automotive manufacturing, and increasing demand for high-performance elastomers in industrial and consumer applications.

SUNCHEM supplies the full spectrum of vulcanization chemistry — from thiazole and sulfenamide accelerators to antioxidant/antiozonant systems and processing stabilizers — enabling formulators to precisely control cure rate, scorch safety, and long-term aging performance.

Tire Manufacturing Industrial Hoses Automotive Seals Footwear Conveyor Belts
Market Size (USD Billion) 3.5 4.0 4.5 5.0 5.5 2021 2022 2023 2024 2025E

Why Source Rubber Additives from SUNCHEM

Direct factory pricing with batch-level QC and full technical documentation for global compliance.

Full Documentation

COA, SDS, and TDS available for all products. Supporting EU REACH, RoHS, and global rubber industry compliance requirements.

Purity-Controlled Supply

Accelerator purity levels verified by HPLC or GC analysis. Consistent batch quality critical for cure rate and scorch safety performance.

Flexible Order Sizes

Sample quantities from 500g for lab trials up to multi-ton bulk for production. Drum, bag, IBC packaging with export documentation.

Our Rubber Additive Categories

Complete portfolio covering vulcanization, stabilization, and processing performance.

Vulcanization Accelerators

Thiazoles (MBT, MBTS), sulfenamides (CBS, TBBS, NOBS), thiurams (TMTD, TETD, TMTM), dithiocarbamates (ZBC) and guanidines (DPG) covering fast, semi-fast, and slow cure systems.

Antioxidants & Antidegradants

Polymerized TMQ (RD) and SUNNOX®1135 provide long-term heat and flex-cracking protection for NR, SBR, and EPDM rubber compounds in outdoor and dynamic applications.

Processing Aids & Inhibitors

PVA as release agent and film-former, lecithin-based emulsifiers (SP-C, SP-W) for compound lubrication, and CTP (PVI) as prevulcanization inhibitor for safe processing at high temperatures.

Rubber Additives Catalogue

Explore our key products — request quotation or technical datasheet for any item.

2-Mercaptobenzothiazole (MBT)
CAS: 149-30-4
Dibenzothiazole Disulfide (MBTS)
CAS: 120-78-5
N-Cyclohexyl-2-Benzothiazole-Sulfenamide (CBS)
CAS: 95-33-0
N-Tertiarybutyl-2-Benzothiazole-Sulfenamide (TBBS)
CAS: 95-31-8
Tetramethyl-Thiuram-Disulfide (TMTD)
CAS: 137-26-8
Diphenyl Guanidine (DPG)
CAS: 102-06-7
Polymerized 2,2,4-Trimethyl-1,2-Dihydroquinoline (TMQ/RD)
CAS: 26780-96-1
N-(Cyclohexylthio)Phthalimide (CTP/PVI)
CAS: 17796-82-6

Request a Quote for Rubber Additives

Send us your compound requirements — our team responds within 24 hours with pricing, availability, and technical documentation.

Related Product Categories

Explore other specialty chemical categories from SUNCHEM.

Frequently Asked Questions

What rubber accelerators does SUNCHEM supply?+

SUNCHEM supplies selected thiazole, sulfenamide, thiuram, dithiocarbamate and guanidine accelerators, including products such as MBT, MBTS, CBS, TBBS, TMTD and DPG. The correct accelerator or blend depends on elastomer type, cure rate, scorch safety, processing conditions and regulatory requirements.

What is the difference between MBT and MBTS?+

MBT (2-Mercaptobenzothiazole, CAS 149-30-4) is a primary accelerator with fast cure speed but limited scorch safety. MBTS (Dibenzothiazole Disulfide, CAS 120-78-5) is the disulfide form with improved scorch safety and better storage stability, commonly used in NR and SBR compounds as a primary or secondary accelerator.

What is CBS used for in rubber compounding?+

CBS (N-Cyclohexyl-2-Benzothiazole-Sulfenamide, CAS 95-33-0) is a delayed-action sulfenamide accelerator widely used in NR, SBR, and BR tire compounds. It provides excellent scorch safety with fast vulcanization and produces a flat cure plateau, making it the preferred accelerator for modern tire manufacturing.

What antidegradants do you offer for rubber?+

We supply TMQ (Polymerized 2,2,4-trimethyl-1,2-dihydroquinoline, CAS 26780-96-1) as a heat and aging antioxidant for NR and SBR, and SUNNOX®1135 (CAS 125643-61-0) as a high-performance antidegradant providing combined antioxidant and antiozonant protection for rubber articles used in dynamic outdoor environments.

Can you provide COA, SDS, and TDS documents?+

Yes — all products have full technical documentation available including Certificate of Analysis (COA), Safety Data Sheet (SDS/MSDS), and Technical Data Sheet (TDS). Documents are provided in English. Please email info@sunchemgroup.com with your product name and required document format.

What packaging and order sizes are available?+

Rubber accelerators are available in 25kg bags, 500kg big bags, and drums depending on the product form (powder, granule, or liquid). Sample quantities from 500g are available for trials. We provide full export documentation including fumigation certificates, packing lists, and B/L instructions for sea and air freight.

Rubber Additives

Rubber Additives in China

Chinese rubber additive suppliers have a strong product and price advantage in one product category, but there is room for improvement in the comprehensiveness of the product. Chinese rubber additive companies are small and sophisticated. Due to the large number of Chinese companies, they have a strong price advantage. Especially in the case of raw material shortage, the advantages of Chinese suppliers come into play.

Rubber Additives
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Our Experience About Rubber Additives

There are a large number of suppliers of rubber additives in China, and they often have a strong product advantage and price advantage in a particular category. If it is your first time to purchase in China, you may have difficulty in finding the best supplier in a short time. Our company collects factory information every day, including their raw material supply, latest technology development, etc. We know all the rubber additive manufacturers in China. During our years of cooperation, we know every key point of our customers and can offer you the best solution. We set a clear price for our customers and we take all the risks for you.

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