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US 4,948,834 AGranted
Vinyl chloride-olefin copolymers having good color stability and flexibility for container coatings
AssigneePPG Industries, Inc.
InventorsJohn A. Baker, Rudolf Maska, James R. Bodwell, Suryya K. Das, Jerome A. Seiner, Terence J. Hart
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Abstract
Disclosed herein is an improved vinyl chloride latex copolymer composition having good color stability, characterized in that it contains a small but effective amount of an alpha-olefin to provide color stability of films of the composition.
Claims15
An improved vinyl halide latex copolymer composition having color stability, containing a copolymer of free-radical addition polymerizable ethylenically unsaturated monomer in water, in the presence of a polymeric surfactant;
- the improvement comprising a copolymerizable alpha-olefin monomer selected from the group consisting of ethylene, propylene, isobutylene and butene-1, which is present in an amount of about 0.5 to 6 percent by weight based on the weight solids of the monomers of the latex copolymer to reduce or prevent discoloration of a film of the vinyl halide latex copolymer composition, upon baking at temperature of about 350.degree. F. or higher.
Dependencies are inferred from the claim text.