Process for producing new polyester resin and product thereof

Details Process for producing new polyester resin and product thereof Process for producing new polyester resin and product thereof

1981-12-21

1983-06-07

Lee, Lester L.

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

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

528176, 528180, 528181, 528182, 528192, 528194, C08G 6318, C08G 6332, C08G 6334

Patent

active

043872115

ABSTRACT:
A new polyester resin is produced by condensation polymerization of (a) a diol component of the formula: ##STR1## wherein R.sup.1 is an alkylene group of 2 to 4 carbon atoms; and x and y are positive integers, the sum of them being 2 to 16 on an average, and (b) an acid component of polybasic (at least dibasic) carboxylic acid, anhydride thereof, and lower alkyl ester thereof, said acid component (b) containing 1 to 50 mol % of a dibasic carboxylic acid or anhydride thereof of the formula: ##STR2## where R.sup.2 and R.sup.3 are saturated or unsaturated hydrocarbon groups of 4 to 20 carbon atoms and 10 to 30 mol % of trimellitic acid or anhydride thereof. The polyester has improved toughness, abrasion resistance and flexibility.

REFERENCES:
patent: 2634251 (1953-04-01), Kass
patent: 3397254 (1968-08-01), Wynstra et al.
patent: 3440218 (1969-04-01), Caldwell
patent: 3754909 (1973-08-01), Feltzin et al.
patent: 4123454 (1978-10-01), Buxbaum

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