Direct Factory Integration & Specialized Chemical Processing Solutions
Shandong Boctok Chemical Co. was established in 2012 as the unified marketing, sales, and global supply chain center for Boctok™ domestic and international organosilicon and polymer operations. Demonstrating exceptional growth, the enterprise achieved a global sales volume of US$280 million in 2023. Over the past decade, we have built a comprehensive industrial presence, with a particular specialization in delivering top-tier solutions to global high-precision industrial sectors.
Our core competence centers on a broad catalog of advanced silicon materials, providing essential inputs for Liquid Silicone Rubber (LSR) processing, plastic modification, and performance enhancement. Operating as a critical partner in the manufacturing value chain, our silicone infrastructure covers twelve distinct silane coupling agent and crosslinker series. This includes high-purity aminosilanes, methacrylates, epoxies, vinyls, mercaptos, alkyls, ethyl silicates, chlorosilanes, isocyanates, phenyls, and ureidosilanes.
By leveraging our advanced intermediates, vinyl silicone fluids, and specialty siloxane crosslinkers, Boctok empowers modern injection molding factories to produce LSR (Liquid Silicone Rubber) characterized by rapid cure cycles, precise mechanical tolerances, high temperature stability, and superior biocompatibility.
Deciphering performance benchmarks and specification matrices across core industries
Injection molding grade Liquid Silicone Rubber (LSR) represents a highly specialized category of synthetic elastomers. Unlike traditional high-consistency rubber (HCR), LSR is processed via automated injection molding equipment utilizing liquid components (commonly designated Part A and Part B). Global procurement directors evaluating Chinese LSR factories must align their standard operating procedures (SOPs) with rigorous regulatory and technical frameworks.
Demands biocompatibility (USP Class VI / ISO 10993). Critical requirements include minimal volatile organic compounds (VOCs), resistance to sterilization cycles (autoclave, gamma radiation, ethylene oxide), and processing cleanliness under Class 100,000 cleanroom standards.
Focuses on oil resistance, mechanical durability, and thermal insulation. Key metrics encompass low compression set at high temperatures (-50°C to +200°C), precise hardness controls (Shore A 10 to 80), and self-lubricating surface options for connector seals.
Requires high dielectric strength, flame retardancy (UL 94 V-0 compliance), and optical clarity for light guides and lenses. Precise viscosity control (dynamic shear viscosity) is mandatory to prevent flashing during micro-injection processes.
To fulfill these highly specific technical requirements, Shandong Boctok Chemical supplies critical performance additives. Our high-hydrogen silicone oil works as a highly efficient crosslinking agent, and our vinyl silicone oil controls elongation and tensile profiles. Additionally, our MQ and VMQ resins are widely used as structural reinforcing agents to increase the tear strength and physical longevity of cured LSR matrices.
How Shandong Boctok's raw material synthesis fuels next-generation industrial output
Shandong Boctok Chemical operates as a strategic chemical partner across three major business segments. Beyond our primary organosilicon portfolio, our secondary core business addresses petroleum resins. We have invested extensively in high-quality hydrocarbon resin manufacturing facilities in China, operating three modernized plants located in Zibo, Fushun, and Nanjing.
By leveraging reliable raw material supply lines from SINOPEC and PetroChina, our C9 hydrogenated resins, C5 hydrocarbon resins, C5/C9 modified resins, and DCPD dimers are integrated into high-temperature adhesives and industrial coatings. This diversifies our role in the automotive and electrical insulation sectors, complementing our silicone elastomer offerings.
Additionally, Boctok provides vital chemical synthesis intermediates for the agricultural industry, manufacturing essential precursors for pesticides, fungicides, seed treatments, and plant growth regulators. Our multi-faceted chemical manufacturing infrastructure allows us to build cross-functional material solutions for complex industrial challenges worldwide.
Navigating the transition towards intelligent manufacturing and smart material synthesis
Modern injection molding factories are moving away from peroxide-based curing systems toward platinum-catalyzed addition reaction chemistry. This shift ensures zero toxic byproducts, eliminates post-curing requirements in many applications, and significantly reduces cycle times (from minutes to seconds). Advanced raw materials, such as our high-hydrogen and vinyl-terminated siloxane fluids, enable precise crosslinking densities that facilitate flash-free injection.
The production of composite parts—combining LSR with thermoplastics (such as PBT, PA, or PC) or metal inserts—requires strong interfacial adhesion. By incorporating specialized organofunctional silanes (such as epoxy, amino, and vinyl silanes) directly into the LSR compound, modern factories achieve self-bonding properties. This eliminates the need for primers, decreases assembly steps, and enables automated multi-component (2K) injection molding.
Looking toward the future, the integration of LSR with additive manufacturing is expanding rapidly. Factories require photo-curable Liquid Silicone Rubbers for rapid prototyping and low-volume production. Custom siloxane resins modified with acrylic or epoxy groups, coupled with precise silica reinforcement, allow designers to print complex structures that are impossible to machine using standard mold tooling.
Exhibiting authority through large-scale capital investment and environmental responsibility
The global demand for high-grade silicone elastomers is driving rapid consolidation in manufacturing regions. To meet the scale and precision requirements of international markets, Shandong Boctok Chemical recently completed a US$65 million capital investment to establish a state-of-the-art production plant located in the Bohai Industrial Park, a provincial chemical industry park in Shouguang City, Shandong Province.
This facility expands our downstream silane and silicone compound production chains, operating 6 fully automated DCS (Distributed Control System) lines with a designed annual output of 30,000 tons of premium silane coupling agents and silicone derivatives.
Our international business model delivers chemical materials directly to key global markets. Today, Boctok’s products are exported to North America, Europe, Japan, South Korea, Australia, South America, the Middle East, India, Southeast Asia, and Russia, building lasting partnerships based on quality and technical support.
Engineered logistics, strict quality assurance, and robust client relations
Our products undergo rigorous testing at every processing phase to guarantee compliance with international quality standards.
Modern DCS-driven operations allow us to scale production and support both high-volume orders and customized batches.
Our experienced technical support and sales teams are available 24/7 to resolve technical queries and streamline orders.
Integrated supply chains and distribution networks ensure fast order processing and timely ocean/rail freight delivery.
A comprehensive overview of our chemical material portfolios and agricultural inputs
Covering high-purity silane coupling agents, silicone oils, specialty silicone rubbers (RTV, LSR intermediates), and petroleum resins. These products are formulated to improve physical performance, adhesion, and durability in polymer matrices.
Formulating active ingredients and synthesis intermediates for crop protection, fruit cultivation, vegetable farming, and floriculture. Designed to support sustainable agriculture and high-yield farming.
Providing essential inputs for a wide range of industrial, consumer, and high-tech applications
Meeting international quality and environmental standards for global material procurement
For international procurement departments, material compliance is a critical requirement. Our production processes adhere to rigorous environmental and safety guidelines to support smooth integration into global supply chains.
Shandong Boctok Chemical operates within the **Bohai Industrial Park**, a highly regulated, provincial-level chemical zone. Our modern facilities are equipped with integrated environmental protections, including complete waste gas absorption towers and closed-loop wastewater treatment units, ensuring full compliance with current environmental mandates.
On the product level, we offer comprehensive compliance documentation:
With sales centers configured to service Europe, North America, the CIS region, and Southeast Asia, Boctok provides localized logistics solutions, customizable packaging, and complete customs clearance documentation. This helps global buyers optimize inventory management and maintain stable production schedules.
Addressing key engineering questions regarding material processing, mold design, and compound behavior
LSR features a much lower viscosity than HCR, allowing it to be pumped through closed delivery systems directly into mold cavities. It is vulcanized via a platinum-catalyzed addition reaction, which yields no chemical byproducts and allows for fast cure cycles. HCR is typically peroxide-cured, requires manual milling, and demands significantly higher injection pressures, making it less suitable for high-precision micro-parts.
Tear strength in LSR is primarily determined by the reinforcement material. We utilize high-surface-area fumed silica treated with our custom silane coupling agents. Additionally, incorporating vinyl VMQ silicone resins provides a branched molecular network that significantly improves the elastomer's tear resistance.
Due to the low viscosity of LSR at high temperatures, material can easily migrate into parting lines, causing flashing. Common solutions include improving mold clamping force, optimizing parting line venting to less than 0.005 mm, and adjusting the viscosity profile of the raw silicone fluid. Our vinyl silicone oils and crosslinkers help compounders customize viscosity and cure speed to prevent premature flow.
Yes. Overmolding LSR onto thermoplastics or metals requires reliable adhesion. By introducing specialized organofunctional silanes (such as epoxy-functional silanes) into the LSR compound, the elastomer forms strong chemical bonds with the substrate during vulcanization, eliminating the need for separate primer applications.
Our Shouguang factory uses a fully integrated DCS (Distributed Control System) along with a Safety Instrumented System (SIS). These systems monitor reaction temperatures, pressures, and raw material feed rates in real-time, ensuring batch-to-batch consistency that complies with ISO 9001:2015 standards.
Explore our complete range of high-performance silicone rubbers, resins, and agricultural inputs
Boctok Chemical
