Process of producing polyester, and developer composition for el

Details Process of producing polyester, and developer composition for el Process of producing polyester, and developer composition for el

1989-11-13

1991-05-14

Kight, III, John

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

Synthetic resins

From carboxylic acid or derivative thereof

528296, 528302, 528303, 528305, 528306, 528308, 5283086, 430109, C08G 6302

Patent

active

050157248

ABSTRACT:
A modified polyester is produced by co-condensation-polymerizing a starting linear polyester which may have a branched group, having a number-average molecular weight of 300 to 1,400 and containing from 10 to less than 25 mole percent, basd on the total constituent monomer units of the starting polyester, of a dihydric alcohol having the following formula: HO--(CH2)n--OH, in which n is an integer of 2 to 6, with a tri- or more-valent monomer(s) selected from a tri- or higher valent carboxylic acid, a derivative thereof and a tri- or higher-valent alcohol. The modified polyester is useful as binder resin in an electrophotographic developer composition and toner.

REFERENCES:
patent: 4533614 (1985-08-01), Fukumoto et al.
patent: 4533617 (1985-08-01), Inoue et al.
patent: 4804622 (1989-02-01), Tanaka et al.
patent: 4849495 (1989-07-01), Funato et al.

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