W. R. Grace Co.

Merrill Bleyle

William D DelVecchio

Alex Trofimow

Porous, fibrous materials such as non-woven polyester or polypropylene web materials, cotton web, paper and other materials are saturated with a storage stable one-package latex composition. The latex composition is modified with a temperature sensitive cross-linking agent and neutralizing agents. The latex composition is tailored such that a fibrous material may be impregnated and dried at controlled temperature whereby a thermoplastic resin saturant web intermediate stock material having thermoset properties is produced. The cross-linking system in the latex composition is later activated in a specific manufacturing process at heat forming and molding temperatures to obtain a specifically shaped manufacture of desired rigidity and flexibility.

Cross-linking resin saturant and method

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.

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Waltham, MA, United States of America

Merrill Bleyle