LOW VOC POLYMERS WITH RELEASE PROPERTIES

摘要

A polymer that can be used as a release coating or a release agent in an LAB, either of which can be provided in VOC-free form and which exhibits excellent release even after aging under high humidity, includes mer that contain pendent groups that include carbamate functionalities.

主权项

1. A release polymer comprising at least 67 mole percent mer units that comprise a pendent group that
(1) comprises at least two (thio)carbonyl moieties, the C atom of one of said (thio)carbonyl moieties being bonded to two additional heteroatoms, one of said additional heteroatoms being a nitrogen atom and the other being selected from O, S and N, or (2) is defined by the formula —(X)nR7ZR3 where
X is an O or S atom,n is 0 or 1,R3 is a long chain alkyl group or a larger functionality that includes a long chain alkyl group,Z is a divalent (thio)carbonyl-containing group that further comprises two additional heteroatoms bonded to the C atom of the (thio)carbonyl moiety, one of said additional heteroatoms being a nitrogen atom and the other being selected from O, S and N, andR7 is a phenyl or C1-C6 alkylene group, said release polymer exhibiting less than 0.5 parts per million volatile organic chemicals when subjected to standard analytical testing procedures for such chemicals.