Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Patent
1992-06-24
1993-04-13
Seidleck, James J.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
525 78, 525 80, 525301, 525302, 525309, 525315, 525316, 525317, 525319, 525320, 525322, 525324, 525902, 525289, C08L 5106, C08F25502, C08F25506, C08F25508
Patent
active
052023800
ABSTRACT:
The addition of a polyolefin-acrylic graft copolymer to blends of polyolefin and core-shell polymers improves compatibility and allows core-shell polymers to be used as processing and performance modifiers polyolefins. Generally the compatibilizing additive is a graft copolymer of a polyolefin and a methacrylate. More specifically, the graft copolymer is derived from at least about 80% of a monomer of a methacrylic ester of the formula CH.sub.2 .dbd.C(CH.sub.3)COOR, where R may be alkyl, aryl, or aralkyl, substituted or unsubstituted, and less than 20%, based on a total monomer weight, of an acrylic or styrenic monomer copolymerizable with the methacrylic ester grafted on to a non polar polyolefin trunk, so that at least one chain is a polymer with a weight average molecular weight greater than about 20,000 and is present in a weight ratio with the polyolefin trunk of from about 1:9 to about 4:1.
A typical composition may contain about 20% core-shell modifier, about 10% compatibilizer, the balance being polyolefin.
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Dunkelberger David L.
Ilenda Casmir S.
Labanoski Dennis J.
Driks Jordan J.
Frickey Darryl P.
Jagannathan Vasu S.
Rohm and Haas Company
Seidleck James J.
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