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US 5,371,137 AGranted
Emulsion polymerization
AssigneeNational Starch and Chemical Investment Holding Corporation
InventorsPhilip J. Blincow, Michael T. Sarkis
Life of this patent
Estimating the term…
Abstract
Vinyl C.sub.1 to C.sub.3 alkanoate/C.sub.2 to C.sub.4 alkylene copolymer emulsions e.g. vinyl acetate/ethylene, are usable as wet adhesives and pressure sensitive adhesives for a number of applications. Their bonding to the surfaces of lower polarity, e.g. polyethylene, is improved by including vinyl esters of C.sub.4 to C.sub.18 primary carboxylic acids as a monomer.
Claims3
An adhesive emulsion composition having a Tg of about +10.degree. C. to about -65.degree. C. consisting essentially of, in the polymer solids, by weight,
- i) from about 5% to about 85% by weight of vinyl C.sub.1 to C.sub.3 alkanoate,
- ii) from about 10% to about 50% by weight of C.sub.2 to C.sub.4 alkylene, and
- iii) from about 5% to about 85% by weight of vinyl 2-ethylhexanoate or vinyl laurate.
Dependencies are inferred from the claim text.