Silico-acrylic compositions: method for their preparation and use
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United States of America Patent
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Nov 30, 2004
Grant Date -
Oct 4, 2001
app pub date -
Mar 30, 2001
filing date -
Apr 3, 2000
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Abstract
Fluid silico-acrylic compositions, stable in the long term, polymerizable thermally and by radiatiion, by mechanism giving rise to free radicals, with a very low water (less than 1%) and volatile solvent content, containing silica, a silane, and a multifunctional acrylic monomer, in which the silica is in the form of indivualized particles with an average diameter with the range 9 amd 100 nm, not interconnected by siloxane bonds, the silane is a vinyl silane with the formula (I) H.sub.2 C.dbd.CH--Si(OR).sub.3 (I) in which R represents a methyl or ethyl radical, and the multifunctional (meth)acrylic monomer is an alkoxylated (meth)acrylate, method for preparation and use for the development of anti-scratch transparent and uncoloured varnishes, obtained by polymerization giving rise to free radicals by radiation (UV, electron bundles) or thermally.
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