Styrene-free unsaturated polyester

摘要

A thermosetting unsaturated polyester resin (UPR) composition comprising an unsaturated polyester polymer having at least two strained cycloolefinic double bonds and optional unstrained cycloolefinic double bonds, which can be cross-linked through a ring-opening metathesis polymerization (ROMP) or combination of ROMP and cationic or free radical polymerization is provided. No styrene is used in the resin composition. The thermosetting unsaturated polyester resin composition also comprises a catalyst system for the ring-opening metathesis polymerization, and in embodiments, can further comprise one or more optional unsubstituted or substituted cycloolefin monomer containing unsaturation, an optional co-catalyst selected from a cationic initiator or free radical initiator, and optional additives. The cured resin properties can be controlled through adjusting the structure and properties of the unsaturated polyester resin.

主权项

1. A polymerizable thermosetting unsaturated polyester resin composition containing no styrene monomer, comprising:
a) an unsaturated polyester polymer containing at least two strained cycloolefinic double bonds, which can be cross-linked through a ring-opening metathesis polymerization (ROMP); and b) a catalyst system for the ring-opening metathesis polymerization; wherein the unsaturated polyester polymer containing at least two strained cycloolefinic double bonds is the reaction product of a norbornene compound containing functional groups or linkages selected from the group consisting of alcohol, carboxylic acid, ester and anhydride, with a glycol or polyhydric alcohol, and a di- or polycarboxylic acid or anhydride, and has a weight average molecular weight of at least about 1000 and a polydispersity greater than or equal to about 2.