Uses of chelated metal catalysts for acid/epoxy polymer systems
AssigneeRohm and Haas Company
InventorLawrence S. Frankel
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Abstract
This application discloses a composition and a method for catalyzing and crosslinking of a polyepoxy compound and an acrylic resin containing carboxylic acid groups, the catalyst being in the form of a metal chelate, particularly of manganese, zinc or chromium. The compositions, when substantially freed of volatile solvent and adjusted to a viscosity resembling that of gunnable caulking compositions, are particularly well adapted as a replacement for the metallic body solder used in automobile manufacture to fill out imperfections, welded joints and the like, when applied thereto and cured.
Claims7
A composition comprising a linear addition copolymer, derived from a monomer mixture containing from 5 to 45% by weight of one or more, -ethylenically unsaturated carboxylic acids, the T.sub.g of the copolymer being from -45.degree. C. to 20.degree. C., the copolymer being capable of forming a thermoset resin by reaction with a resin-forming epoxy compound containing a plurality of epoxide groups, and a catalyst in the amount of 0.04% to 10% by weight based on the weight of the addition copolymer, the catalyst being a transition metal chelate stable at ambient temperatures up to about 22.degree. C. and which decomposes to release the chelated metal when heated to temperatures of about 100.degree. C., any quantity of organic solvent present being from 0% to 10% of the combined weight of copolymer and solvent, and which composition contains a resin-forming a polyepoxy compound.
Dependencies are inferred from the claim text.