Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Ethylenically unsaturated reactant admixed with either...
Patent
1980-02-26
1981-07-28
Ziegler, J.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Ethylenically unsaturated reactant admixed with either...
525 27, 525 35, 525 36, 525 39, 525445, 528190, 528192, 528194, 528298, C08L 6700
Patent
active
042810744
ABSTRACT:
In the first stage a mixture of a crude diene adduct of 2-naphthol with maleic anhydride is polycondensed at a temperature within the range from 180.degree. to 200.degree. C. with excess glycol or with a dihydric aromatic alcohol, from 0.1 to 3 moles of the alcohol being used per 1 mole of the adduct. In the second stage, the thus obtained product is condensed at a temperature within the range from 160.degree. to 210.degree. C. with an unsaturated acid or the anhydride thereof and with the addition of an equimolar quantity (with respect to the acid or its anhydride) of glycol and/or a dihydric aromatic alcohol. The resulting product is then dissolved in styrene and copolymerized to obtain a cured polyester resin. Propylene glycol, diethylene glycol, dipropylene glycol or butylene glycol may be used as the glycol. The C.sub.2 or C.sub.4 alkoxy derivatives of 2,2-bis(p-hydroxyalkoxyphenyl) propane, of bis(hydroxyalkoxy)binaphthyl or of bis(hydroxyalkoxynaphthyl) methane may be used as the dihydric aromatic alcohol. Maleic acid, fumaric acid or anhydrides thereof are the unsaturated acid or anhydride components used.
Czarnecki Jan
Jedlinski Stanislaw
Jedlinski Zbigniew
Kotas Antoni
Mazur Stanislaw
Polska Akademia Nauk Zaklad Polimerow
Ziegler J.
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