C - Chemistry – Metallurgy – 08 – L
Patent
C - Chemistry, Metallurgy
08
L
400/1, 402/194,
C08L 67/06 (2006.01) C08G 63/91 (2006.01)
Patent
CA 1150893
Abstract A method is disclosed for treating polyester resin systems to sup- press gel-time drift for the usable storage life of the resin system. The method comprises contacting a solution containing a polyester binder with an organic acid either between formulation stages or after formulation of the resin system. Typically useful organic acids include aromatic dicarboxylic acids such as phthalic acid and unsaturated aliphatic dicarboxylic acids such as fumaric acid. Comparative data for gel times of polyester resin system samples treated according to the disclosed method show ?ppression of gel-time drift to as low as 6 percent of the gel-time drift of counterpart untreated resin system samples.
356935
Borden Ladner Gervais Llp
Koppers Company Inc.
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