Explore high-performance chemical formulations, silane coupling agents, and specialty resins engineered for rigorous global specifications.
In high-temperature, high-voltage, and flame-critical applications, modern engineering demands materials that deliver exceptional reliability. Flame Retardant Liquid Silicone Rubber (FR-LSR) represents the pinnacle of silicone elastomer technology, offering unique properties that traditional solid silicones and organic polymers cannot match.
As industries pivot toward electrification, structural weight reduction, and stricter fire-safety regulations, the necessity of obtaining top-tier FR-LSR is paramount. Unlike standard silicone grades, FR-LSR is formulated with halogen-free flame-retardant additives, platinum catalysts, and synergistic metal hydroxides (such as Aluminum Trihydroxide or Magnesium Hydroxide) that form a structural char layer upon combustion. This technology minimizes smoke production, limits toxic outgassing, and prevents ignition propagation in vital systems.
A globally trusted manufacturer of organosilicone products, petroleum resins, and high-performance industrial chemicals.
Founded in 2012, Shandong Boctok Chemical Co. was established as a high-capacity marketing and sales center for Boctok™ domestic and overseas businesses, achieving an impressive sales volume of US$280 million in 2023. Over the decade, our brand has established specialized, high-tier supply channels serving the challenging Eastern European, Russian, Asian, and American markets with extreme precision.
Our comprehensive organosilicone pipeline encompasses twelve advanced series of silane coupling agents and crosslinkers. These include: aminosilane, methacrylate silane, epoxy silane, vinyl silane, mercaptosilane, alkyl silane, ethyl silicate, chlorosilane, silane isocyanates, phenyl silane, ureidosilane, and serosilane.
We provide advanced silicon oil, silicon resin, and silicone rubber derivatives. This comprises high-hydrogen silicone oil, dimethicone, vinyl silicone oil, polyphenylmethyldimethylsiloxane, phenyl silicone oil, silanol silicone oil, and OH polymers, alongside alkoxy silicone oil, methyl MQ resin, vinyl VMQ resin, room-temperature vulcanized methyl silicone rubber, 110 methyl vinyl silicone rubber, and 120 methyl phenyl rubber.
These advanced silicone materials are widely deployed across industries such as glass fiber coatings, electrical potting, wind turbine insulation, daily chemical products, protective coatings, structural adhesives, XLPE electrical cables, hot water pipes, oil field drilling, textile treatments, and precision molding.
Boctok's Tier II core business encompasses highly specialized hydrocarbon resins. Through substantial strategic investment in key hydrocarbon resin manufacturers in China, we now operate three major production facilities located in Zibo, Fushun, and Nanjing. Leveraging raw materials from industry giants SINOPEC and PetroChina, our resins find broad adoption within global Fortune 500 chemical companies.
How advanced compounding and molecular engineering are shaping the next generation of flame retardant silicone elastomers.
Traditional elastomers depend heavily on halogenated compounds (brominated/chlorinated) to suppress combustion, which release highly corrosive gases and dense smoke. Modern FR-LSR utilizes a clean mechanism. Polydimethylsiloxane (PDMS) is inherently resistant to oxidation, but when integrated with micro-fined metal oxides, it undergoes catalytic char formation upon exposure to heat.
Platinum compounds catalyst system accelerates the crosslinking of vinyl-containing silicone chains under heat, forming a non-flammable siliceous protective layer (glassy carbon shield) that blocks oxygen transport to the bulk material. This synergy yields UL 94 V-0 flame-class ratings without sacrificing elasticity or electrical resistivity.
The technical progression of Liquid Silicone Rubber focuses on three main vectors:
| Performance Parameter | Standard Silicone LSR | Flame Retardant LSR (FR-LSR) | Advanced Ceramic-Forming LSR |
|---|---|---|---|
| UL 94 Flammability Class | HB / V-2 | V-0 (down to 1.0mm thickness) | V-0 / 5VA (Zero Flame Drip) |
| Limiting Oxygen Index (LOI) | 24% – 26% | 33% – 38% | > 42% |
| Thermal Conductivity (W/m·K) | 0.2 | 0.6 – 1.2 (for heat dissipation) | 1.5 – 2.5 |
| Dielectric Strength (kV/mm) | 20 | 18 – 22 | 16 – 20 |
| Key Additive Chemistries | Silica Fillers | Pt catalysts, Metal Hydroxides | Silicates, Ceramic Precursors |
How Boctok leverages capital investment, automation, and geographic integration to ensure uninterrupted global supply.
Supply chain reliability is crucial for industrial polymer procurement. To stabilize global deliveries and maintain cost efficiency, Boctok invested US$65 million to establish our state-of-the-art facility located in the Bohai Industrial Park, a provincial chemical industry park in Shouguang City, Shandong Province. This complex significantly expands our production chain of silane coupling agents and advanced silicone compounds.
Deploying advanced silicone compounding solutions to resolve severe thermal challenges in regional industries.
In electric vehicles (EVs), cell-to-cell thermal propagation poses a critical safety risk. FR-LSR is injection-molded into extremely thin gaskets, cell spacer pads, and busbar covers. In a thermal runaway event (reaching temperatures exceeding 1000°C), the material transitions into a ceramic-like silica structure, blocking heat transfer and allowing occupants extra time to evacuate.
5G micro-base stations require highly reliable weather-proof seals that can dissipate heat while isolating high-voltage electronics. Low-viscosity, self-leveling FR-LSR potting compounds protect delicate circuitry from moisture ingress and dust. Crucially, they prevent electrical arcing, fulfilling strict national electrical safety standards globally.
Aerospace cabin interior standards demand low smoke density and toxicity. Custom FR-LSR profile extrusions and molded seals are used for duct connectors, window gaskets, and floor lighting covers. This material complies with aerospace fire-test requirements, preventing toxic gas accumulation in enclosed cabins.
Outdoor cold-shrink cable terminations, power line insulators, and switchgear sleeves must withstand tracking, corona erosion, and severe lightning strikes. Our FR-LSR materials demonstrate exceptional tracking resistance (complying with IEC 60587 class 1A 4.5kV) and resist flame propagation caused by electrical failure.
Why international leaders choose Boctok as their primary silane, resin, and elastomer supplier.
Our products undergo rigorous testing to ensure that every aspect meets the highest quality standards, implementing ISO9001 throughout the process.
We have advanced production lines that allow us to effectively expand production capacity and meet the demand for mass customization.
Our professional team is available online 24 hours a day to provide attentive service and answer all your technical and logistics questions.
An optimized logistics system ensures fast order processing and timely delivery to domestic and global customers.
Divided into core strategic pillars to serve precision chemistry and manufacturing industries.
Comprehensive silane crosslinkers, coupling agents, functional silicone oils, and specialty polymers crafted to enhance compatibility, adhesion, and thermal performance across complex substrates.
Advanced chemical intermediates and functional raw formulations assisting global partners in fabricating high-efficiency insecticides, fungicides, and targeted plant regulators.
Our materials serve as foundational components across these key applications.
Navigating global chemical directives with complete documentation and regional engineering teams.
We work directly with certification bodies to ensure our Flame Retardant LSR materials carry verified UL 94 V-0 and V-1 ratings, allowing seamless integration into global consumer appliances and EV safety enclosures.
Compliance with European directives is vital. Our FR-LSR is formulated to be completely free of Decabromodiphenyl ether (DecaBDE), Octabromodiphenyl ether (OctaBDE), and other hazardous substances listed under the RoHS directive.
We provide localized technical assistance. Our application engineers help configure injection molding machines, optimize curing cycles, and resolve processing issues to ensure efficient manufacturing.
Expert answers to common questions about sourcing, processing, and deploying Flame Retardant LSR.
Specialized siloxanes, precision gum compounds, and crosslinkers for advanced industrial applications.
Boctok Chemical
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