Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Reexamination Certificate
2002-03-04
2008-12-16
Moore, Margaret G (Department: 1796)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
C525S411000, C528S354000, C156S352000
Reexamination Certificate
active
07465770
ABSTRACT:
The invention is directed to a method for preparing an environmentally degradable polymeric compound as well as to such a compound per se and to its use. A compound of the present invention includes a polycondensated lactic acid containing polymer, having a molecular weight (Mw) of from 500 to 50,000 g/mol, to which a flexibilizing aliphatic polyester having a molecular weight of from 500 to 50,000 g/mol is coupled. The amount of lactic acid including groups in the polymeric compound ranges from 50 to 99% and the amount of flexibilizing polyester groups ranges from 1 to 50%.
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Derwent abstract of DE 4300420 A1, Sterzel, Jul. 1994.
English language translation JP 10 120 773, May 1998.
M. Penco, L. Sartore, F. Bignotti, S. D'Antone, L. Di Landro; Thermal properties of a new class of block copolymers based on segments of poly(D,L-lactic-glycolic acid) and poly(e=caprolactone); European Polymer Journal; ; 2000; pp. 901-908; vol. 36; Elsevier Science; Great Britian.
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Janssen Jane
Kelly William E.
Lewis David Neal
Schutte Gerrit
Westerhof Henk
Moore Margaret G
Tate & Lyle Public Limited Company
Williams Morgan & Amerson P.C.
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