Patent ID: 6136912
Filing Date: 2000-10-24
Classification: C08F,C09D

Abstract:
Silicoacrylic compositions which are fluid, polymerizable thermally or by radiation, by a radicular mechanism, with less than 1.5% and volatile solvent content containing silica, a silane and a multifunctional acrylic monomer, characterized in that the silica is in the form of individualized particles, with an average diameter comprised between 5 and 100 nm, not linked together with siloxane bonds, that the silane is a vinylsilane of formula (I)H.sub.2 C.dbd.CH--Si(OR).sub.3 (I)in which R represents a methyl or ethyl radical, that the multifunctional acrylic monomer is tripropylene glycol diacrylate designated TPGDA, in that the quantity of vinylsilane of formula I is comprised between 0.01 millimole and 0.1 millimole per m.sup.2 of silica used and in that they are transparent and colourless as water and stable over time.