Polyamide, polyester and polyether block copolymer

Details Polyamide, polyester and polyether block copolymer Polyamide, polyester and polyether block copolymer

2011-06-28

2011-06-28

Woodward, Ana L (Department: 1765)

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

Synthetic resins

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

C525S403000, C525S434000, C528S288000, C528S318000

Reexamination Certificate

active

07968655

ABSTRACT:
The invention relates to a segmented block copolymer including polyamide blocks, polyester blocks and polyether blocks, of general formula: (I) -[BD-BM]n- in which: BD or hard block is a polyamide block; BM or soft block represents a mixture of polyether blocks and polyester blocks; and n is the number of -BD-BM- units in said copolymer, characterized in that the percentage of polyether blocks (PE blocks) is strictly higher than 15 wt % of said copolymer, and in that said polyester blocks (PES blocks) have a glass transition temperature Tgbelow 10° C.

REFERENCES:
patent: 5253871 (1993-10-01), Viollaz
patent: 5703177 (1997-12-01), Hoff
patent: 5932686 (1999-08-01), Hoff
patent: 2004/0158027 (2004-08-01), Van Schijndel et al.

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