Epoxy group-terminated polymers, the compositions thereof and the use thereof as impact resistance modifiers

摘要

The present invention relates to epoxy group-terminated polymers of the formula (I). Said epoxy group-terminated polymers are suited extremely well as impact resistance modifiers, particularly in epoxy resin compositions. They are particularly suited for use in heat-curing epoxy resin adhesives. It has been found that such epoxy resin compositions not only have excellent mechanical properties and high glass transition temperatures, but also above all improved impact resistance properties, both at room temperature and at low temperatures.;

主权项

1. An epoxide group-terminated polymer of the formula (I) where Y1 is an n-valent radical of a linear or branched polyurethane polymer terminated with isocyanate groups, PU1, after the removal of the n terminal isocyanate groups; Y2 is a radical of an aliphatic, cycloaliphatic, aromatic or araliphatic epoxide containing a primary or secondary hydroxyl group, after the removal of the hydroxide groups and epoxide groups; m is 1, 2 or 3; n is 2 to 8; and where the polyurethane polymer PU1 is obtained from at least one diisocyanate or triisocyanate and from at least one nonphenolic diol Q1 and at least one polymer Q2 having terminal hydroxyl groups, thiol groups, primary amino groups or secondary amino groups, and where the nonphenolic diol Q1 has a number average molecular weight of 60 to 400 g/mol and the polymer Q2 has a number average molecular weight of 600 to 20,000 g/mol.