In February 2026, an invention patent for a two-component addition-cure liquid silicone rubber composition was published, attracting industry attention for achieving a new balance between low viscosity, low hardness, and high tear strength.

Technological Innovation Pathway

The patented technical solution primarily employs vinyl-terminated polysiloxane as vinyl silicone oil, fumed silica as a reinforcing filler, and hydrogen-containing silicone oil as a crosslinker. The key innovation lies in the introduction of alkenylsilane as a functional additive, enabling the preparation of a two-component addition-cure liquid silicone rubber that combines low viscosity, low hardness, high tear strength, and excellent flexibility under the action of a platinum catalyst.

According to the published patent information, the composition consists of two components, A and B. Component A comprises vinyl-terminated polysiloxane, fumed silica treatment agent, fumed silica, water, MQ resin, platinum catalyst, and optional alkenylsilane. Component B comprises vinyl-terminated polysiloxane, fumed silica treatment agent, fumed silica, water, MQ resin, hydrogen-containing silicone oil, inhibitor, and optional alkenylsilane.

Application Prospects and Industry Trends

Based on the published information, this technology is suitable for the manufacture of lipstick silicone molds, meeting the demands of small-batch customized production. More broadly, this technological breakthrough reflects the industry trend of liquid silicone rubber evolving from "general-purpose" toward "functionally customized" products.

For downstream processing enterprises, LSR with low viscosity and high tear strength can reduce operational difficulty in precision molding processes, improve the first-pass yield of complex structural components, and minimize product defects. In sub-sectors such as mold silicone and conformal silicone coatings, materials that balance processability and mechanical properties will demonstrate significant application value.

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