Coating layer with self-repairing properties for panes exposed to atmospheric agents
First Claim
1. A transparent polyurethane coating layer with self-repairing properties for panes or transparent objects made of glass or plastic material, formed from a reactive mixture comprising a plurifunctional isocyanate component and a plurifunctional polyalcohol component, wherein the isocyanate component of the reactive mixture is chosen from the essentially trifunctional aliphatic polymers formed from 1,6-hexamethylenediisocyanate monomer, having an NCO radical content of 15 to 25% by weight and the polyalcohol component of the reactive mixture is a plurifunctional polyester polyalcohol having an OH radical content of 3 to 12% by weight.
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Abstract
A polyurethane coating layer, with self-repairing properties, for panes made of glass and/or plastic materials, which are exposed to atmospheric agents. The coating layer according to the invention is formed from a reactive mixture of a trifunctional isocyanate component such as the biurets or isocyanurates of 1,6 hexamethylenediisocyanate, having a content of about 15 to 25% by weight of NCO radicals and a polyalcohol component chosen from the plurifunctional polyester polyalcohols having about a 3 to 12% by weight content of OH radicals.
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Citations
8 Claims
- 1. A transparent polyurethane coating layer with self-repairing properties for panes or transparent objects made of glass or plastic material, formed from a reactive mixture comprising a plurifunctional isocyanate component and a plurifunctional polyalcohol component, wherein the isocyanate component of the reactive mixture is chosen from the essentially trifunctional aliphatic polymers formed from 1,6-hexamethylenediisocyanate monomer, having an NCO radical content of 15 to 25% by weight and the polyalcohol component of the reactive mixture is a plurifunctional polyester polyalcohol having an OH radical content of 3 to 12% by weight.
Specification