Process for producing new polyester resin and product thereof

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From phenol – phenol ether – or inorganic phenolate

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Details

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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