Patent ID: 6462127
Filing Date: 2002-10-08
Classification: C08F,C08G,C09D

Abstract:
A self-crosslinking polyurethane polymer hybrid dispersion based on oxidatively drying polyols having a high degree of film hardness, wherein it comprises the reaction components:(A) an unsaturated fatty acid component capable of oxidative drying and having at least two hydroxyl groups reactive toward polyisocyanates comprising a reaction product of unsaturated fatty acids and at least one of aliphatic epoxy resins, aromatic epoxyresins or polyepoxides having two or three epoxide groups reactive toward fatty acids, (B) a polyol component consisting of (i) a high molecular weight polyol having at least two hydroxyl groups reactive toward polyisocyanates and a molar mass of from 500 to 4000 Dalton, (ii) a low molecular weight polyol having at least two hydroxyl groups reactive toward polyisocyanates and a molar mass of from 50 to 500 Dalton, (iii) a low molecular weight and anionically modifiable polyol having at least two hydroxyl groups reactive toward polyisocyanates and at least one carboxyl group inert to polyisocyanates and a molar mass of from 100 to 200 Dalton, (C) a polyisocyanate component, (D) optionally comprising a siccative component, (E) optionally comprising at least one solvent component selected from the group consisting of: (i) at least one organic solvent inert to polyisocyanates and (ii) a reactive diluent inert to polyisocyanates and consisting of at least one organic compound inert to polyisocyanates and having one or more double bonds capable of free radical polymerization, (F) at least one neutralization component selected from the group consisting of at least one inorganic or organic base, (G) a chain-extending component comprising at least one polyamine having two or more amino groups reactive toward polyisocyanates, (H) a monomer component comprising at least one monomer having one or more double bonds capable of free radical polymerization and (I) a free radical initiator component and contains water as the remainder.