Plastisol resins having improved clarity
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United States of America Patent
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May 20, 1980
Grant Date -
N/A
app pub date -
Sep 1, 1978
filing date -
Sep 1, 1978
priority date (Note) -
Expired
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Abstract
A method for improving the clarity of plastisol resin films includes the steps of polymerizing vinyl chloride alone or in the presence of a copolymerizable monomer to yield a latex, and dissolving a nonionic emulsifier in the latex prior to spray drying. The resulting mixture is thereafter spray dried to yield a resin which in turn can be mixed with a plasticizer to form a paste and spread as a thin layer to be fused into a film with heat. Alternatively, the nonionic emulsifier can be added, after spray drying, during preparation of the paste by mixing the emulsifier and plasticizer followed by addition of the resin. The nonionic emulsifiers of the present invention have the formula R--O--(CH.sub.2 CH.sub.2 --O).sub.n H wherein R is selected from the group consisting of fatty acids, polyol fatty acid esters, fatty alcohols, fatty amines, fatty amides, polypropylene oxide and alkylated phenol, and n is an integer ranging from 1 to about 50.
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