Silicoacrylic compositions, preparation process and use for obtaining coatings which are hardenable thermally or by radiation
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United States of America Patent
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Oct 24, 2000
Grant Date -
N/A
app pub date -
Dec 7, 1998
filing date -
Dec 23, 1997
priority date (Note) -
Expired
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Abstract
Silicoacrylic compositions which are fluid, polymerizable thermally or by radiation, by a radicular mechanism, with a very low water (less than 1.5%) and volatile solvent content containing silica, a silane and a multifunctional acrylic monomer, in which 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, the silane is a vinylsilane of formula (1) H.sub.2 C.dbd.CH--Si(OR).sub.3 (I) in which R represents a methyl or ethyl radical, in which the multifunctional acrylic monomer is tripropylene glycol diacrylate designated TPGDA, 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 which are transparent and colourless as water and stable over time and preparation process.
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