Process for making lactide graft copolymers

Details Process for making lactide graft copolymers Process for making lactide graft copolymers

1997-08-26

1998-12-22

Truong, Duc

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, 525 69, 525186, 525386, 528310, 528354, C08G 6348, C08G 6391

Patent

active

058521178

ABSTRACT:
Polylactide or polyglycolide graft copolymers are prepared by a process comprising preparing a backbone polymer from acrylate and/or methacrylate monomers and from one or more polymerizable monomers that contain a functional group unreactive in a free-radical polymerization, the backbone polymer being compatible with lactide monomer or lactide polymer; adding to the resulting polymer up to 40% by total polymer weight, but not 0%, of the D- or L-isomer of lactide in an enantiomeric excess of 84%; heating the mixture of lactide and polymer to a temperature of 80.degree.-175.degree. C. in the presence of a tin catalyst for a period of time effective to polymerize the lactide and react the lactide with the functional group on the backbone polymer.

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