Copolyester and process for the production thereof
AssigneeToyobo Co., Ltd.
InventorsKeiichi Uno, Takahito Miyagawa
Life of this patent
Estimating the term…
Abstract
A copolyester useful for adhesives, paints, surface treating agents, plasticizers, binders, or the like, which comprises the following five components: A. terephthalic acid, B. isophthalic acid, C. an aliphatic dicarboxylic acid of the formula: HOOC--(CH.sub.2).sub.n --COOH wherein n is an integer of 4 to 7, inclusive, D. ethylene glycol, and E. neopentyl glycol, The said copolyester containing the five components in the following molar ratio: 50/50 .ltoreq. [(a)+(b)]/(c) .ltoreq. 75/25 30/70 .ltoreq. (a)/(b) .ltoreq. 70/30 40/60 .ltoreq. (d)/(e) .ltoreq. 80/20 and a process for the production thereof.
Claims6
A copolyester derived from:
- a. terephthalic acid or an ester-forming derivative thereof,
- b. isophthalic acid or an ester-forming derivative thereof,
- c. an aliphatic dicarboxylic acid of the formula:
- HOOC -- (CH.sub.2).sub.n --COOH
- wherein n is an integer of 4 to 7, inclusive, or an ester-forming derivative thereof,
- d. ethylene glycol, and
- e. neopentyl glycol,
- wherein the molar ratios of the components in the copolyester are as follows:
- 50/50 .ltoreq. [(a) + (b)]/(c) .ltoreq. 75/25
- 30/70 .ltoreq. (a)/(b) .ltoreq. 70/30
- 40/60 .ltoreq. (d)/(e) .ltoreq. 80/20.
A copolyester derived from
- a. terephthalic acid,
- b. isophthalic acid,
- c. adipic acid,
- d. ethylene glycol, and
- e. neopentyl glycol,
- wherein the molar ratio of the components (a)/(b)/(c) is 25-35/25-35/35-45 and the molar ratio of the components (d)/(e) is 50-60/40-50.
A copolyester derived from:
- a. dimethyl terephthalate,
- b. dimethyl isophthalate,
- c. adipic acid,
- d. ethylene glycol, and
- e. neopentyl glycol,
- wherein the molar ratio of the components (a)/(b)/(c) is 25-35/25-35/35-45 and the molar ratio of the components (d)/(e) is 50-60/40-50.
Dependencies are inferred from the claim text.