Founded in 2012, Shandong Boctok Chemical Co. has rapidly emerged as a formidable global leader in the marketing, sales, and manufacturing of high-performance organosilicon materials, specialty petroleum resins, and agrochemical intermediates. With an unwavering commitment to quality and technical innovation, our enterprise achieved a stellar sales milestone of US$280 million in 2023.
Our dedicated brand, BOCTOK™, has earned a robust reputation globally and specializes extensively in serving the high-demand Russian and Eastern European markets, alongside established export channels across North America, Europe, Japan, South Korea, Australia, the Middle East, India, and Southeast Asia.
Boctok has invested heavily in state-of-the-art facilities. We recently injected US$65 million to construct our new manufacturing complex in the Bohai Industrial Park, a provincial chemical industry zone located in Shouguang City, Shandong Province. This high-capacity plant hosts 6 fully automated DCS (Distributed Control System) production lines, giving us an annual output of 30,000 tons of high-grade silane coupling agents and specialty silicone polymers.
Safety and consistency are our primary benchmarks. All production lines are integrated with a Safety Instrumented System (SIS) and run strict quality management processes conforming to ISO9001 standard procedures. Furthermore, advanced environmental protection installations—such as an automated waste gas collection & treatment unit and a dedicated high-capacity wastewater processing plant—insure eco-friendly operations and full regulatory compliance.
Alkoxy-terminated silicone oil, predominantly represented by Trimethoxy-terminated polydimethylsiloxane (CAS number 68440-70-0), represents a pinnacle class of reactive organosilicon polymers. In contrast to traditional hydroxyl-terminated (silanol) polymers, alkoxy-terminated variants feature terminal methoxy or ethoxy groups linked directly to silicon. This molecular design is fundamental in fabricating single-component, moisture-curing Room Temperature Vulcanization (RTV-1) sealants, adhesives, and coatings.
Upon exposure to atmospheric moisture, the alkoxy groups (≡Si-OCH3) undergo nucleophilic substitution (hydrolysis), catalyzed by organometallic compounds (typically organotin or titanium complexes). The reaction yields reactive silanol intermediates and releases volatile alcohols (methanol or ethanol) as byproducts. These transient silanols immediately react with residual alkoxy groups or neighboring polymer chains in a condensation reaction, forming stable, three-dimensional siloxane (Si-O-Si) network architectures without needing external curing agents.
This neutral condensation cure displays distinct advantages over older acetoxy (acid-releasing) systems:
As a leading China Alkoxy-Terminated Silicone Oil manufacturer, Boctok provides tailored viscosity grades ranging from low-viscosity formulations designed for electronic potting, to ultra-high viscosity grades that serve as base polymers in structural glazing adhesives.
Boctok prides itself on industrial depth and strict quality control. Over more than a decade, we have established several strategic benefits that ensure our customers receive superior products at competitive pricing, backed by reliable supply lines.
Strict Quality Assurance
Every single batch of our Alkoxy-Terminated Silicone Oil and silane coupling agents undergoes rigorous testing. Using advanced gas chromatography, GPC molecular weight analysis, and automated titration, we guarantee consistent viscosity, volatile content, and reactivity profile in every delivery.
High Production Capacity
With an annual capacity of 30,000 tons of silane coupling agents at our new Shouguang facility, alongside dedicated silicone oil production lines, we comfortably handle mass customization requests and bulk contracts, maintaining robust safety reserves of key products.
24/7 Global Customer Care
Our dedicated international sales team is online 24 hours a day, providing continuous, localized service, chemical integration support, technical issue troubleshooting, and real-time status updates across different global time zones.
Fast Delivery & Logistics
By leveraging close logistics networks within Shouguang Bohai Industrial Park and direct links to major Chinese deep-water ports (Qingdao and Tianjin), we guarantee optimized container loading, rapid customs clearances, and minimal transit delays.
While Alkoxy-Terminated Silicone Oil remains a core specialty, Shandong Boctok Chemical Co. has developed a three-tier business portfolio that meets the needs of multiple global industrial sectors:
Our first core business covers twelve series of silane coupling agents and crosslinkers including: Aminosilane, Methacrylate Silane, Epoxy Silane, Vinyl Silane, Mercaptosilane, Alkyl Silane, Ethyl Silicate, Chlorosilane, Silane Isocyanates, Phenyl Silane, Ureidosilane, and Serosilane. Alongside silanes, we specialize in high-purity silicone oils, resins, and rubbers, such as: High-Hydrogen Silicone Oil, Dimethicone, Vinyl Silicone Oil, Polyphenylmethyldimethylsiloxane, Phenyl Silicone Oil, Silanol Silicone Oil, 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.
We are strategic investors in major hydrocarbon resin plants located in Zibo, Fushun, and Nanjing. Benefiting from a reliable stream of raw materials supplied directly by Sinopec and PetroChina, our advanced factories process high-purity C9 Hydrogenated Resins, C5 Hydrocarbon Resins, C5/C9 Modified Resins, Dicyclopentadiene (DCPD), and Methyl Cyclopentadiene Dimer. These resins serve as key tackifiers in hot-melt adhesives, pressure-sensitive tapes, paints, and tire compounds.
We supply high-grade raw materials and advanced chemical intermediates to pesticide, fungicide, insecticide, seed treatment, herbicide, and plant growth regulator manufacturers worldwide.
Due to its versatile chemistry, Boctok Alkoxy-Terminated Silicone Oil is deployed across multiple specialized industrial environments globally, including customized local formulations:
In highly concentrated industrial zones throughout Germany, South Korea, and Japan, our low-viscosity Trimethoxy-terminated polydimethylsiloxane is critical for encapsulating sensitive vehicle control units (ECUs). Operating as a low-viscosity neutral potting agent, it flows easily around delicate electronic components and cures at room temperature to form a shock-absorbent, moisture-proof barrier that resists engine heat and chemical exposure.
For the demanding Russian market, sealants based on BOCTOK™ Alkoxy-Terminated Silicone Oil are widely specified for high-rise glass curtain walls. These formulations remain flexible at extreme sub-zero temperatures (down to -60°C) and withstand intense summer UV rays. The neutral alkoxy release ensures no corrosion to composite panels or aluminum spacer frames.
With the rapid expansion of EV battery manufacturing hubs in China and Europe, our specialized alkoxy silicone fluids are customized as flame-retardant, thermal-conductive potting matrices. Their deep-section curing capability ensures a bubble-free, structurally sound fill that dampens cell vibration and improves heat dissipation from cell walls to the cooling plates.
Pharma & Agrochemicals
Cosmetics (Resins & Oils)
Industrial Adhesives
Rubber Industry
Paints & Coatings
Plastics Industry
Pesticides
Self-lubricating LSR
Antifoaming Agent
Drywall & Construction
Silicone Liquids
Automotive & Aviation
Moldmaking / Forms
Electronics Industry
Construction
Glazing Sealants
Paint & Varnish
Metal Treatment
Wire & Cable (XLPE)
Resin Synthesis
Material Processing
Wind Energy
Biomedical
Textiles
Minerals & Fillers
Trapezoidal Polymers
Paints (Silicone)
In the modern chemical market, supply security is as crucial as product quality. By placing our primary silane coupling agent and silicone polymer manufacturing in Shandong's Shouguang Bohai Industrial Park, Boctok operates at the center of the world's most robust chemical ecosystem. We maintain complete vertical integration of upstream silicon metal, local chlorosilane supplies, and direct pipelines for critical alcohols, insulating our global customers from raw material shocks.
Furthermore, our close raw material partnerships with SINOPEC and PetroChina for our petroleum resin plants in Zibo, Fushun, and Nanjing ensure a steady supply of high-purity C5 and C9 feedstocks. Even in periods of global supply stress, Boctok guarantees stable output, contract fulfillment, and consistent pricing.
Looking ahead, our R&D roadmap focuses on next-generation silicon technologies to address changing environmental standards. We are actively developing:
As a leading industry resource, our technical team answers frequently asked questions from chemical engineers, formulators, and procurement managers:
Because alkoxy groups (specifically methoxy terminated) are highly sensitive to moisture, exposure to humid air will initiate premature hydrolysis and crosslinking. In original, unopened, airtight containers, our polymer has a stable shelf life of 12 months from the date of manufacture. It should be stored in dry, cool, well-ventilated indoor areas at temperatures below 27°C (80°F). For bulk storage, we recommend using a dry nitrogen blanket.
Silanol-terminated polydimethylsiloxanes (OH polymers) are typically used in two-part condensation systems, or in one-part systems that require acidic or oxime-based crosslinkers (releasing irritating acetic acid or methyl ethyl ketoxime). Alkoxy-terminated polymers contain the reactive crosslinking groups directly on the polymer chain endpoints. This enables single-part formulations that cure via neutral moisture absorption, releasing non-corrosive, low-toxicity alcohols—making them ideal for automotive and microelectronic assemblies.
Titanium chelate complexes (such as diisopropoxytitanium bis(ethylacetoacetate)) and organotin compounds (like dibutyltin dilaurate - DBTDL) are the most effective catalysts. Titanium complexes are generally preferred for alkoxy systems because they prevent discoloration and speed up adhesion development, whereas organotin catalysts are selected when rapid deep-section curing is required.
Yes, our chemical synthesis plant in Shouguang specializes in tailored polymerization. We regularly supply viscosities ranging from 100 cSt (for thin electronic coatings) up to 120,000 cSt (for heavy structural sealant bases). Every custom batch maintains low volatiles and strict polydispersity control.
Absolutely. Shandong Boctok Chemical Co. enforces strict compliance across all product lines. Our silicone oils, silane coupling agents, and petroleum resins undergo third-party SGS testing to confirm they are free from heavy metals, brominated flame retardants, and restricted phthalates. We also actively coordinate REACH registrations for our European customers to ensure seamless customs processing.
Boctok Chemical