Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...
Patent
1993-02-26
1994-03-08
Schofer, Joseph L.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Polymers from only ethylenic monomers or processes of...
524556, C08F22006, C08F22010, C08L 3102, C08L 3302
Patent
active
052928420
ABSTRACT:
Acrylic copolymer PSA compositions having enhanced peel strength without substantially decreasing shear properties have been formulated by producing the copolymer with a broad molecular weight distribution such that the ratio M.sub.w /M.sub.n is above 6, preferably above 10. The alkyl (meth)acrylate and (meth)acrylic acid monomers are emulsion polymerized over a temperature profile wherein the difference between the maximum and minimum polymerization temperatures is at least about 40.degree. C. and less than about 70.degree. C., preferably using a redox initiator system such as bromate/bisulfite.
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Bell C. L.
Cheng Wu C.
Exxon Chemical Patents Inc.
Kurtzman M. B.
Schofer Joseph L.
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