Adhesive systems and laminates
AssigneeUSM Corporation
InventorDarrell A. Klemme
Life of this patent
Estimating the term…
Abstract
This invention presents to the art novel heat curable adhesive systems and laminates bonded by the adhesive system. The heat curable adhesive system comprises a heat curable adhesive composition which is a dispersion of a specific polyester, a polyvinylchloride which is or includes a carboxylated polyvinyl chloride and a polyepoxide and a curing agent for the adhesive composition. Curing of the adhesive composition can be effected at relatively low activation temperatures which provides distinct advantages in preparing laminates particularly those involving thin sheets of polymeric material bonded to metal sheet materials.
Claims14
A laminate comprising a polymeric sheet material bonded to the surface of a substrate by a heat curable adhesive system comprising an adhesive composition and a curing agent for the composition, said adhesive composition comprising a dispersion of from about 10 to about 30 percent by weight of a polyester, from about 1 to about 6 percent by weight of a polyvinylchloride which comprises from about 25 to 100 percent by weight of a carboxylated polyvinylchloride and from about 1 to about 6 percent by weight of a polyepoxide, said polyester being the product of a reaction between a combination of diols, a combination of phthalic acids and, a combination of phthalic acid anhydrides where:
- a. the combination of diols represents from about 30 to about 50 percent be weight of the reactants and consists essentially of 1,4 butane diol and neopentyl glycol and the neopentyl glycol represents from about 55 to about 85 percent be weight of the combination of diols,
- b. the combination of phthalic acids represents from about 40 to about 60 percent by weight of the reactants and consists essentially of isophthalic acid and terephthalic acid and the isophthalic acid represents from about 40 to about 80 percent be weight of the phthalic acid combination and,
- c. the combination of phthalic acid anhydrides represents from about 5 to about 15 percent by weight of the reactants and consists essentially of hexahydrophthalic anhydride and trimellitic anhydride and the hexahydrophthalic anhydride represents from about 55 to about 95 percent by weight of the phthalic acid anhydride combination and,
- a curing agent dispersible in said adhesive composition and capable of initiating cure of said adhesive composition.
A laminate comprising a polymeric sheet material comprising a polymer of vinyl chloride or vinylidene chloride and having a thickness between about 1 to about 10 mils bonded to a surface of metal sheet material of a thickness between about 0.010 to about 0.080 inch by a heat curable adhesive system comprising an adhesive composition and a curing agent for the composition, said adhesive composition comprising a dispersion of from about 10 to about 30 percent by weight of a polyester, from about 1 to about 6 percent by weight of a polyvinylchloride which comprises from about 25 to 100 percent by weight of a carboxylated polyvinylchloride and from about 1 to about 6 percent by weight of a polyepoxide, said polyester being the product of a reaction between a combination of diols, a combination of phthalic acids and, a combination of phthalic acid anhydrides where:
- a. the combination of diols represents from about 30 to about 50 percent by weight of the reactants and consist essentially of 1,4 butane diol and neopentyl glycol and the neopentyl glycol represents from about 55 to about 85 percent by weight of the combination of diols,
- b. the combination of phthalic acids represents from about 40 to about 60 percent by weight of the reactants and consists essentially of isophthalic acid and terephthalic acid and the isophthalic acid represents from about 40 to about 80 percent by weight of the phthalic acid combination and,
- c. the combination of phthalic acid anhydrides represents from about 5 to about 15 percent by weight of the reactants and consists essentially of hexahydrophthalic anhydride and trimellitic anhydride and the hexahydrophthalic anhydride represents from about 55 to about 95 percent by weight of the phthalic acid anhydride combination and,
- a curing agent dispersible in said adhesive composition and capable of initiating cure of said adhesive composition.
Dependencies are inferred from the claim text.