Photo setting composition for coating substrates with an abrasion-resistant transparent or translucent film
AssigneeBattelle Development Corporation
InventorsNguyen van Tao, Gunter Bellmann
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Abstract
A process is disclosed for producing an abrasion resistant UV curable photopolymerizable composition for coating substrates. The process involves dense grafting and comprises hydrolyzing in an aqueous acidic solution a trialkoxysilane to render it organophillic followed by dispersion with fine silica or alumina. Grafting of the hydrolyzed trialkoxysilane to the silica or alumina is effected through dehydration. The grafted material is then dispersed into intimate contact with one or more photopolymerizable monomers and photoinitiators.
Claims4
A process for producing a UV-cured photopolymerizable composition for applying onto a substrate to provide thereon a transparent abrasion-resistance coating comprising:
- hydrolyzing a trialkoxysilane in an aqueous acidic solution,
- dispersing said hydrolyzed trialkoxysilane into intimate contact with finely divided pyrogenic or precipitated silica or alumina having a particle size of less than 0.1 micron to form a dispersion,
- chemisorbing said hydrolyzed trialkoxysilane onto the finely divided pyrogenic or precipitated silica or alumina by effecting dehydration of said dispersion by heating to 80.degree. to 110.degree. C. to yield organophillic particles, the amount by weight of hydrolyzed trialkoxysilane chemisorbed onto the silica or alumina being 20% or more relative the weight of the silica or alumina particles,
- dispersing said organophillic particles into intimate contact with one or more photopolymerizable monomers and one or more photoinitiators.
Dependencies are inferred from the claim text.