Flame Retardants Supplier from China

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.

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.

DOPO (9,10-Dihydro-9-oxa-10-phosphaphenanthrene-10-oxide, CAS 35948-25-5) is a reactive, halogen-free phosphorus flame-retardant intermediate used in epoxy resins and other thermosetting systems, including selected electronic laminates, encapsulants and composite applications. It introduces phosphorus into the polymer structure, but formulation and curing performance must be validated in the final resin system.

Both are halogen-free mineral flame retardants that release water endothermically and can reduce smoke. Aluminum hydroxide (ATH, CAS 21645-51-2) decomposes at a lower temperature and is commonly used in EVA, thermosets, cable compounds and construction materials processed below its decomposition range. Magnesium hydroxide (CAS 1309-42-8) 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.

Regulatory status depends on the exact product, grade and destination market. For each product we can provide an SDS and, where applicable, RoHS and REACH statements or SVHC declarations for the grade you order. Tell us your destination and end use so we can confirm the documents before you place an order.

Most products are packed in 25kg paper bags or fiber drums. Liquid products (BDP, RDP) in 200kg drums or IBC tanks. Samples (100g–1kg) available for evaluation. Minimum commercial order: 25–100kg depending on product. Contact david@sunchemgroup.com with your specific requirement for a tailored quotation.

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.

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.

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.

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.