Vinylidene chloride copolymer latexes
AssigneeW. R. Grace & Co.
InventorsMerrill Bleyle, William D. DelVecchio, Alex Trofimow
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Abstract
New vinylidene chloride copolymer latexes have been prepared with a hydroxyalkyl ester comonomer and acrylamido-2-methylpropane sulfonic acid. These products can be used to coat unprimed polyolefin film and yield laminates having dynamic peel strengths as high as 2400 g/in, that is equivalent to or greater than the peel strength of laminated uncoated polyethylene film itself.
Claims2
A laminate comprising at least one layer of unprimed polyolefin film bonded to a vinylidene chloride copolymer coating obtained from a composition comprising an aqueous dispersion of a copolymer which comprises, on a weight basis:
- a. about 70 to 95% vinylidene chloride,
- b. about 0.5 to 25% of an hydroxyalkyl ester of an alpha, beta-ethylenically unsaturated carboxylic acid having at up to 5 carbon atoms,
- c. about 0.1 to 5% 2-acrylamido-2-methylpropane sulfonic acid,
- d. about 0.1 to 5% of an ethylenically unsaturated carboxylic acid having up to 5 carbon atoms, and
- e. about 1 to 29% of copolymerized ethylenically unsaturated monomer containing no free acid or hydroxyalkyl groups.
Dependencies are inferred from the claim text.