High molecular polyetherpolyester and its production process and

Details High molecular polyetherpolyester and its production process and High molecular polyetherpolyester and its production process and

1997-10-21

1999-10-26

Yoon, Tae

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

Synthetic resins

From carboxylic acid or derivative thereof

528274, 528275, 528300, 528301, 524600, C08G 6312, C08L 6700

Patent

active

059731044

ABSTRACT:
A film-formable high molecular polyetherpolyester comprising structural unit (1) of formula (1) and functional group (2) of formula (2) and having a number-average molecular weight of 40,000 to 10,000,000, wherein the molar ratio of functional group (2) to R in the polyetherpolyester is in the range of 1.0 to 3.0. This polyetherpolyester can be produced by carrying out a chain extension reaction of a low molecular polyalkylene oxide of 1,000 to 30,000 in number-average molecular weight with a polyvalent acid anhydride at 0.003 MPa or higher in a molar ratio of (acid anhydride group)/(hydroxyl group)=0.8 to 1.0. ##STR1##

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George Odian, "Principles of Polymerization", 2nd Ed. "Polyesters" pp. 102 & 104, John Wiley & Sons. 1981.
Rhein et al., "New Polymer Systems: Chain Extension by Dianhydrides," JPL Quarterly Technical Review, Jan., 1972, pp. 97-103, vol. 1, No. 4.
Rhein et al., "New Polymer Systems: Chain Extension by Dianhydrides," Rubber Chem. Technol., 1972, pp. 1554-1559, vol. 45.
Rhein et al., "New polymer systems: chain extension by dianhydrides," Polymer, Oct. 1973, pp. 466-468, vol. 14.

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