Resin for use in a coating composition

摘要

A coating system comprises a substrate and a cured film disposed on the substrate and formed from a coating composition. The coating composition comprises a solvent component and a resin. The resin comprises a reaction product of a polyolefin and an oligomer or polymer. The polyolefin, different from the oligomer or polymer, has a functional group that is reactive with the oligomer or polymer and the functional group is selected from acrylate, methacrylate, carboxyl, hydroxyl, epoxide, anhydride and isocyanate functional groups. The oligomer or polymer and the polyolefin are at least partially immiscible in solution at ambient temperature. The oligomer or polymer is grafted with the polyolefin to form the resin.

主权项

1. A resin comprising a reaction product of:
an oligomer or polymer comprising an acrylic having a number average molecular weight of from 2,500 to 4,000 g/mol, said oligomer or polymer having reactive functionality thereon selected from hydroxyl, carboxyl, anhydride, isocyanate, and epoxide functional groups; and a polyolefin that is different from said oligomer or polymer and having a functional group selected from acrylate, methacrylate, carboxyl, hydroxyl, epoxide, anhydride and isocyanate functional groups, the polyolefin having a number average molecular weight of from 350 to 700 g/mol; wherein said functional group of said polyolefin is reactive with said reactive functionality of said oligomer or polymer; wherein said oligomer or polymer and said polyolefin are at least partially immiscible in solution at ambient temperature; and wherein said polyolefin is reacted in an amount of from 15 to 50 parts by weight and said oligomer or polymer is reacted in an amount of from 50 and 85 parts by weight, based on 100 parts by weight of the components utilized to form said resin.