Polyetherester block copolymer and process for producing the sam

Details Polyetherester block copolymer and process for producing the sam Polyetherester block copolymer and process for producing the sam

1979-05-29

1981-02-17

Nielsen, Earl A.

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

Synthetic resins

From carboxylic acid or derivative thereof

525437, 528283, 528301, C08G 6366

Patent

active

042516528

ABSTRACT:
A polyetherester block copolymer having enhanced compatibility of soft polyether segments with hard polyester segments thereof, excellent mechanical strength, a proper melt fluidity and enhanced resistance to chemicals, heat and light, which copolymer comprises (1) 50 to 95% by weight of polyester segments comprising a dicarboxylic acid component containing at least 50 molar percent of terephthalic acid and a diol component containing at least 50 molar percent of 1,4-butane diol and (2) 5 to 50% by weight of polyether segments comprising poly(tetramethylene oxide)glycol, which is characterized by a large number average molecular weight of from 1,500 to 2,500 and by a small variance of less than 1.70 in molecular weight distribution.

REFERENCES:
patent: 3013914 (1961-12-01), Willard
patent: 3023192 (1962-02-01), Shivers
patent: 3663653 (1972-05-01), Frohlich et al.
patent: 3701755 (1972-10-01), Sumoto et al.
patent: 3944516 (1976-03-01), Petke
patent: 4130603 (1978-12-01), Tanaka et al.

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