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US 5,177,154 AGranted
Environmental coating solution
AssigneeNational Patent Development Corporation
InventorDaniel G. Moro
Life of this patent
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Abstract
A water compatible terpolymer for sealing and coating building materials which protects surfaces from environmental staining agents. The terpolymer is created by polymerizing a HEMA:SMA co-polymer with another monomer which contains either free acid or base groups. The resultant terpolymer is water solution after neutralization. Water is then added to bring the solvent level to 40% maximum and the solids level to 8%.
Claims7
A water-compatible polymerization product produced by a method comprising the steps of
- (a) polymerizing in a solvent, in the presence of a catalyst, an ionic monomer free acid or base groups with hydroxyethyl methacrylate and stearyl methacrylate to a solids level of approximately 20%
- (b) neutralizing the resultant terpolymer with either acid or base, respectively;
- (c) adding water to decrease the solvent level to 40% maximum and the solids level to 8%, and
- (d) catalyzing with ammonium dichromate to render the polymerization product insoluble upon exposure to light.
1 more element
Dependencies are inferred from the claim text.