Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From phenol – phenol ether – or inorganic phenolate
Patent
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
Morimoto Eiji
Sonobe Atsushi
Yasuda Shin-ichiro
Kao Soap Co. Ltd.
Lee Lester L.
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