Alkanolamine-based promoter systems for curing of unsaturated polyester resin compositions
AssigneeAtofina Chemicals, Inc.
InventorJianfeng Lou
Life of this patent
Estimating the term…
Abstract
Disclosed is an improved promoter system for curing resin compositions based on unsaturated polyesters. The promoter system contains at least one primary promoter which is a metallic compound, such as a cobalt salt, and at least one co-promoter which is an alkyl alkanolamine. Such an alkyl alkanolamine is usually an amino (C2-C4) alcohol, and it is present at 1-15 mole of amine per mole of equivalent cobalt metal. The use of alkyl alkanolamine reduces the level of the cobalt promoter in curing formulations with no deleterious effects on the curing performance, which leads to reduced color formation in finished products.
Claims12
A promoter system for curing resin compositions based on unsaturated polyesters, the promoter system comprises at least one primary promoter which is a metallic compound, and at least one co-promoter which is an alkyl alkanolamine.
A promoter system for curing resin compositions based on unsaturated polyesters, the promoter system comprises at least one primary promoter which is an organo-cobalt compound, at least a second metallic compound as a co-promoter, and at least one co-promoter which is an amino (C2-C4) alcohol.
A promoter system for curing resin compositions based on unsaturated polyesters, the promoter system comprising at
- (a) least one primary promoter which is cobalt naphthenate, cobalt octanoate or another cobalt salt of a mono- or di-carboxylic acids, and is present in sufficient quantity as to provide 0.0005-0.02 parts of cobalt metal per 100 parts of the unsaturated polyesters,
- (b) optionally, at least a second metallic compound as a co-promoter, which is copper salt present at a level of 1×10−5-0.01 parts of copper metal per 100 parts of the unsaturated polyesters;
- (c) at least one co-promoter which is an amino (C2-C4) alcohol present at 1-15 mole of amine per mole of cobalt metal.
Dependencies are inferred from the claim text.