Amorphous-crystalline block copolymers

Details Amorphous-crystalline block copolymers Amorphous-crystalline block copolymers

2007-01-30

2007-01-30

Acquah, Samuel A. (Department: 1711)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

C528S295300, C528S296000, C528S300000, C528S301000, C528S302000, C528S306000, C528S308000, C528S308600, C528S354000, C525S437000, C525S445000, C525S450000, C428S035400, C428S035700, C428S221000, C428S364000

Reexamination Certificate

active

10967299

ABSTRACT:
Biodegradable block copolyesters obtained from crystalline blocks and amorphous blocks, wherein the repeating units of both blocks are of the dicarboxylic acid/diol type. Said copolyesters are characterized by a melting temperature equal to or less than 15% lower than the starting crystalline polymer temperature, and by increased tenacity that makes them particularly useful in the production of different types of objects.

REFERENCES:
patent: 3968183 (1976-07-01), Hayashi et al.
patent: 4070417 (1978-01-01), Isaka et al.
patent: 5455311 (1995-10-01), Grigat et al.
patent: 1 024 162 (2000-08-01), None
patent: WO-00/55236 (2000-09-01), None

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