Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From carboxylic acid or derivative thereof
Patent
1991-12-23
1992-10-06
Foelak, Morton
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From carboxylic acid or derivative thereof
528176, 528194, 528195, 528300, 528305, 528308, 5283086, 430 99, C08G 6320
Patent
active
051533014
ABSTRACT:
A polyester resin comprised of (a) units derived from a terephthalic acid component and/or a isophthalic acid component, (b) 0 to 80 mole %, based on the total carboxylic acid component, of units derived from a diol component represented by the formula: ##STR1## wherein R represents an alkyl group having 2 or 3 carbon atoms, and x and y are integers satisfying the requirement of 2.ltoreq.x+y.ltoreq.6,
and (c) 20 to 200 mole %, based on the total carboxylic acid component, of units derived from an aliphatic diol component. The polyester has a weight average molecular weight M.sub.w of 3,000 to 20,000, a number average molecular weight M.sub.n of 1,000 to 10,000, a glass transition temperature T.sub.g of 40.degree. to 70.degree. C., and a softening temperature of 70.degree. to 130.degree. C. The polyester is valuable for a toner.
REFERENCES:
patent: 4314049 (1982-02-01), Yasuda
patent: 4387211 (1983-06-01), Yasuda et al.
patent: 4533614 (1985-08-01), Fukumoto et al.
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patent: 4849495 (1989-07-01), Funato et al.
Patent Abstracts of Japan, vol. 6, No. 54 (C-97) [932], Apr. 9, 1982, & JP-A-56 167 767 (Toyo Boseki K.K.) Dec. 23, 1981.
Patent Abstracts of Japan, vol. 13, No. 424 (P-934) [3772], Sep. 21, 1989; & JP-A-1 155 361 (Kao Corp.) Jun. 19, 1989.
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Funato Ryo
Ito Hirokazu
Kubo Shinji
Tajiri Noriyuki
Takyu Masayuki
Acquah Sam A.
Foelak Morton
Mitsubishi Rayon Company Ltd.
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