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AssigneeSaint-Gobain Vitrage
InventorsJuergen Fock, Gunter Hahn, Gerhard Holzer, Helmer Radisch
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A transparent coating for windows or other transparent substrates made of glass or synthetic resin, consisting of a flexible elastic polyurethane, serves as a shatterproofing coating for substrates made of silicate glass or as a coating improving the scratch resistance of substrates made of synthetic resin. To reduce or prevent the formation of a deposit of moisture on the surface of the coating, the polyol component of the reaction mixture for preparing a coating pursuant to the invention consists of a difunctional sulfonated polyether polyol containing approximately 1 to 10% of OH groups by weight and a trifunctional polyol containing approximately 8 to 12% of OH groups by weight and having an average molecular weight of approximately 400 to approximately 1000 g/mole.
Transparent coating for windows or other substrates made of glass or synthetic resin, comprising a flexible elastic polyurethane that is prepared from a reaction mixture consisting essentially of an isocyanate component which consists essentially of trifunctional aliphatic polyisocyanates of biuret or isocyanurate structure based on 1,6-hexamethylenediisocyanate, containing 15 to 25% by weight of NCO groups and with an average molecular weight of approximately 450 to approximately 1000 g per mole, and a polyol component which contains at least one polyfunctional polyol, and which may contain a reaction catalyst and other auxiliary substances, wherein said polyol component of the reaction mixture comprises a difunctional sulfonated polyether polyol containing 1 to 10% by weight of OH groups and a trifunctional polyol containing approximately 8 to 12% by weight of OH groups and having an average molecular weight of approximately 400 to approximately 1000 g per mole.
Dependencies are inferred from the claim text.