Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Patent
1994-07-25
1996-04-23
Buttner, David
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
525 63, 525148, C08F28302
Patent
active
055104290
ABSTRACT:
A method of grafting alkyl (alkyl) acrylate to a polycarbonate at a carbon atom which both before and after grafting has an sp.sup.3 electron configuration, includes the step of contacting a polycarbonate which is in the solid phase with alkyl (alkyl)acrylate monomers in the presence of a suitable free radical initiator at a temperature sufficient to activate the free radical initiator for a time sufficient to attain a desired degree of grafting. The grafting method of the invention allows for the relatively rapid production of polycarbonate-graft-poly(alkyl(alkyl)acrylate) copolymers using conventional polycarbonate polymers which have not been specially modified to facilitate grafting. The resulting graft copolymer of the process generally has an alkyl (alkyl)acrylate content of from about 1 to about 20 percent by weight with the polycarbonate portion of the graft copolymer having a weight-average molecular weight of from about 5,000 to about 200,000. The graft copolymer product is ideally suited for use as a compatibilizer for forming a miscible polymeric blend between two or more immiscible polymers, or can be used substantially alone as a thermoplastic having enhanced properties characteristic of both polycarbonate and polyacrylates.
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Lee Sunggyu
Sobocinski Ronald A.
Buttner David
The University of Akron
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