Chemistry of carbon compounds – Miscellaneous organic carbon compounds
Patent
1977-02-18
1979-02-27
Lieberman, Paul
Chemistry of carbon compounds
Miscellaneous organic carbon compounds
526202, 526224, 526295, 260 297S, 260 297H, C08L 1102
Patent
active
041418751
ABSTRACT:
An aqueous latex, having high colloidal stability against coagulation upon addition thereto of ionic materials and having excellent adhesive characteristics for bonding metal foil to paper to form laminates, is prepared by polymerizing, in an emulsion substantially free of carboxylate soaps, (1) an aqueous suspension of chloroprene monomer optionally containing about 0.4 to 10 mole percent of alpha, beta-unsaturated carboxylic acid monomer, based on the total monomer content, (2) in the presence of (a) about 3-10 parts of polyvinyl alcohol and (b) about 0.3-2 parts of an organic, sulfur-containing chain-transfer agent of the group consisting of dialkyl xanthogen disulfides and alkyl mercaptans, both (a) and (b) being expressed in parts by weight based on 100 parts by weight of monomer (1). The polymer so produced contains 10-95% gel polymer, and the polyvinyl alcohol is present therein in a form such that it is not completely recoverable by extraction with water.
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Brizzolara Donald F.
Honsberg Wolfgang
E. I. Du Pont de Nemours and Company
Lieberman Paul
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