Transparent polyurethane layer resistant to fogging, method of manufacture and glazing provided with said layer
First Claim
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1. A transparent aliphatic polyurethane layer having cross-link bonds, which can be used in safety glazing, this layer having properties of the surface including resistance to scratching and abrasion, and having monomers and/or oligomers of acrylic acid or of salts of said acrylic acid radiochemically grafted to its surface such that the resulting layer has anti-fogging properties.
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Abstract
A transparent polyurethane layer which is resistant to fogging. The layer contains monomers and/or oligomers of acrylic acid or of salts of said acid grafted radiochemically to the surface of said layer. The layer is used as a coating layer for laminated glazings.
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Citations
12 Claims
- 1. A transparent aliphatic polyurethane layer having cross-link bonds, which can be used in safety glazing, this layer having properties of the surface including resistance to scratching and abrasion, and having monomers and/or oligomers of acrylic acid or of salts of said acrylic acid radiochemically grafted to its surface such that the resulting layer has anti-fogging properties.
- 3. A method for manufacture of a polyurethane layer having anti-fogging properties, and having properties of the surface including resistance to scratching and abrasion, which can be employed in safety glazing, wherein acrylic acid or a salt thereof is grafted to the surface of the polyurethane by placing the polyurethane layer in the presence of the acrylic acid and grafting by irradiation of said polyurethane surface and preventing the formation of an acrylic polymer.
Specification