メタクリレート系・ビニル系シラン

シランカップリング剤は、無機基材と有機樹脂をつなぐ分子の架橋です： the alkoxy end bonds to glass, metal, or mineral surfaces, and the organofunctional end ties into the polymer. Methacrylate and vinyl silanes carry a carbon-carbon double bond, so they couple through free-radical polymerization rather than condensation. Reach for them when the resin cures by a radical mechanism u2014 acrylics, unsaturated polyesters, peroxide-cured systems, and crosslinked polyethylene u2014 where amino or epoxy silanes have no reactive handle.

3-Methacryloxypropyltrimethoxysilane (CAS 2530-85-0) is the standard for acrylic and unsaturated-polyester systems; its methacrylate group copolymerizes into the resin during cure. The trade-off is selectivity: that double bond only couples when a radical cure is actually running, so a methacrylate silane adds little to a condensation- or addition-cured system. Vinyltrimethoxysilane (CAS 2768-02-7) is the leaner vinyl analog, widely used to moisture-crosslink polyethylene and as a coupling agent on mineral fillers.

Hydrolysis rate is the lever for the vinyl grades. Vinyltriethoxysilane (CAS 78-08-0) hydrolyzes slower than the methoxy version and releases ethanol, which suits formulations that need a longer working window. Vinyltris(2-methoxyethoxy)silane (CAS 1067-53-4) carries hydrolyzable groups tuned for moisture-cure systems. Match the silane's reactive group to the resin's cure chemistry first, then tune the alkoxy group to the bath stability and cure speed you need.

• アクリルおよび不飽和ポリエステル塗料に共重合させるカップリング剤
• ポリエチレンの水架橋（シラングラフトXLPE）
• ラジカル硬化型複合材向けの無機充填材・顔料の表面処理
• 過酸化物加硫系におけるガラスおよび金属界面の接着促進
• 加水分解の遅いビニル系グレードを用いる湿気硬化型の塗料・シーリング材

• 3-Methacryloxypropyltrimethoxysilane — PubChem
• 3-Methacryloxypropylmethyldimethoxysilane — PubChem
• Vinyltrimethoxysilane u2014 PubChem
• Vinyltriethoxysilane — PubChem
• Vinyltris(2-methoxyethoxy)silane — PubChem