Method for preparing ether-ester-amide block polymers for among

Details Method for preparing ether-ester-amide block polymers for among Method for preparing ether-ester-amide block polymers for among

1978-08-31

1981-02-24

Lieberman, Paul

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

Synthetic resins

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

525408, 525411, 525425, 525926, C08L 7102, C08L 7712

Patent

active

042529204

ABSTRACT:
Process for preparing ether-ester-amide block polymers. It consists in the reaction, in the molten state of a dicarboxylic polyamide having COOH end groups with a polyoxyalkylene glycol having hydroxyl end groups in the presence of metallic tetraalkoxide(s) as catalysts. The tetraalkoxide(s) used are of the formula M(OR).sub.4 where M is Zr or Hf and the radicals R, identical or different are linear or branched C.sub.1 -C.sub.24 alkyl radicals.

REFERENCES:
patent: 3636135 (1972-01-01), Garforth
patent: 3655821 (1972-04-01), Lofquist
patent: 3839245 (1974-10-01), Schlossman
patent: 3923925 (1975-12-01), Schneider

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