Vinyl MQ Silicone Resin CAS 67763‑19‑3 is a reactive M‑Q structured silicone resin modified with pendant or terminal vinyl groups, synthesized by co‑hydrolysis and polycondensation of corresponding silane monomers. Reactive vinyl groups enable the resin to covalently bond into the silicone network during hydrosilylation curing. It serves as reinforcing raw material for addition‑cure HTV and LSR liquid silicone rubber, enhancing mechanical performance and high‑temperature resistance without impai

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Vinyl MQ Silicone Resin CAS 67763‑19‑3, Vinyl‑Functional MQ Resin for Addition‑Cure HTV LSR Silicone Rubber Reinforcement

This vinyl‑functional MQ silicone resin is manufactured via controlled co‑hydrolysis and polycondensation of vinyl‑containing silane monomers together with methyl silane and tetra‑functional silicate precursors. Its molecular architecture is built from monofunctional M‑units and tetrafunctional Q‑units. A defined quantity of reactive vinyl groups is grafted onto the M‑unit segments of the three‑dimensional resin framework. The vinyl content can be adjusted in production to satisfy different formulation requirements for HTV high‑temperature vulcanized silicone rubber and LSR liquid silicone rubber.

Unlike inert methyl MQ resin which only provides physical reinforcement, the vinyl groups on this resin undergo hydrosilylation reaction with Si‑H functional cross‑linkers under platinum‑based catalytic conditions during curing. The resin molecule is covalently incorporated into the overall silicone cross‑linked network, rather than merely being dispersed as a separate physical filler. This chemical integration greatly improves interfacial compatibility between the rigid MQ resin domains and flexible linear silicone polymer chains.

When compounded into LSR liquid silicone rubber formulations, the resin improves hardness, tensile strength and tear resistance of cured articles. It reduces compression‑set values of vulcanized silicone components and enhances long‑term thermal ageing performance. For HTV addition‑curable silicone rubber systems, it inhibits rubber softening under sustained high‑temperature exposure and elevates the service temperature range of finished silicone parts. Proper resin loading also maintains favorable fluidity of uncured LSR compound, which is critical for injection molding operations.

The resin exhibits good solubility in silicone fluids and aromatic hydrocarbon solvents. Strict attention must be paid to catalyst inhibition issues during formulation. Heavy‑metal contaminants, nitrogen‑containing and sulfur‑containing impurities should be excluded from the compounding environment, as these substances can poison the platinum hydrosilylation catalyst and lead to incomplete curing.

During rubber compounding, uniform dispersion of vinyl MQ resin within the base silicone gum is essential. Insufficient mixing will produce micro‑agglomerates, resulting in surface defects, localized brittleness and inconsistent mechanical performance across molded silicone components. The recommended dosage range needs careful optimization matched with hydrogen‑containing silicone cross‑linker amount according to targeted hardness.

The material requires cool, dry and hermetically sealed storage. Direct sunlight and excessive heat should be avoided. During raw‑material handling, cross‑contamination with silanol‑rich condensation‑type silicone additives must be prevented, to avoid interfering with platinum‑catalyzed hydrosilylation curing. This vinyl‑functional MQ silicone resin is a specialized reinforcing modifying raw material formulated for addition‑cure HTV and LSR silicone rubber systems.

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Jishengya Technology

Shenzhen Jishengya Technology Co., Ltd. is located in Shenzhen, a special economic zone, and is a comprehensive technology enterprise integrating independent R&D, production and sales.