SI M6487.4 Methacryloxypropyltrimethoxysilane 2530-85-0 ABCR SIM6487.4 Methacryloxypropyltrimethoxysilane, 98%+ (MEMO) Widely used coupling agent for unsaturated polyester-fiberglass composities. [1], copolymerized with styrene in formation of sol-gel composities [2]. Methacryloxypropyltrimethoxysilane (MEMO). Used as a coupling agent for unsaturated polyester-fiberglass composities, copolymerized with styrene in formation of sol-gel composities.