Protective coating for window glass
View Patent ↗The invention is a composition comprising: a) one or more film forming resins having at least one functional group capable of polymerization; b) one or more reactive diluents capable of reacting with the film forming resin; c) one or more silicon, titanium, zirconium, aluminum or metal containing compounds capable of promoting adhesion of the composition to glass; d) one or more fillers capable of imparting abrasion resistance to the composition when cured; and e) one or more compounds which is reactive with the film forming resin which also contains at least one acidic moiety. The composition of the invention is useful as a frit on the window of a vehicle.
1. Compositions comprising
a) one or more film forming resins having at least one functional group capable of polymerization;
b) one or more reactive diluents capable of reacting with the film forming resin;
c) one or more compounds capable of promoting adhesion of the composition to glass comprising a Michael addition product of a siloxane further containing one or more hydrogen containing functional moieties with a compound having two or more acrylate groups wherein the addition products have four or greater siloxy groups and at least one acrylate group;
d) one or more fillers capable of imparting abrasion resistance to the composition when polymerized; and
e) one or more compounds which is reactive with the film forming resin which also contains at least one acidic moiety.
2. Compositions according to claim 1 which further comprises f) one or more pigments or dyes.
3. Compositions according to claim 2 wherein at least one of the one or more pigments are capable of blocking the transmission of ultraviolet light.
4. Compositions according to claim 3 wherein the functional groups capable of polymerization of the film-forming resin polymerize when exposed to irradiation and the composition further comprises g) one or more catalysts or initiators capable of initiating polymerization of the film-forming resin.
5. Compositions according to claim 4 wherein the one or more film-forming resins contain unsaturated moieties which polymerize when exposed to ultraviolet light and the initiator is a photoinitiator.
6. Compositions according to claim 5 wherein the one or more film forming resins contain unsaturated moieties which polymerize when exposed to electron beams.
7. Compositions according to claim 4 which further comprises one or more surfactants, dispersants, inhibitors, or mixtures thereof.
8. Compositions according to claim 4 wherein the film forming resins, and reactive diluents have acrylate functional moieties.
9. A composition according to claim 4 wherein adhesion promoter comprises a mixture of a Michael addition adduct and a high molecular weight adduct having multiple alkoxysilanes.
10. Compositions according to claim 4 wherein the one or more compounds containing at least one acidic moiety comprise one or more carboxylic acid moieties, one or more phosphate acids or a mixture thereof.
11. Compositions according to claim 8 wherein the acid moieties comprise carboxylic acids.
12. Compositions according to claim 3 wherein the pigment is carbon black.
13. Compositions according to claim 4 comprising:
a) from about 10 to about 70 parts by weight of the one or more film forming resin;
b) from about 2 to about 30 parts by weight of the one or more reactive diluents;
c) from about 0.1 to about 30 parts by weight of the one or more adhesion promoter;
d) from about 1 to about 15 parts by weight of the one or more pigments;
e) from about 5 to about 60 parts by weight of the one or more fillers;
f) from about 1 to about 10 parts by weight of the one or more compounds containing at least one acidic moiety;
g) from about 2 to about 20 parts by weight of the one or more catalysts or initiators; and
wherein the composition contains 100 parts.