Heat-curable and solvent-soluble ester group-containing polymer

Details Heat-curable and solvent-soluble ester group-containing polymer Heat-curable and solvent-soluble ester group-containing polymer

1975-07-07

1979-01-30

Briggs, Sr., Wilbert J.

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

Synthetic resins

From carboxylic acid or derivative thereof

260 23, 260857PE, 260858, 260860, C08J 300, C08G 6370

Patent

active

041372212

ABSTRACT:
A heat-curable and solvent-soluble ester group-containing polymer composition is prepared by the steps of:
(1) either (i) reacting a highly polymerized linear aromatic polyester with a diaryl carbonate to depolymerize it to a solvent-soluble low-molecular-weight polyester (component A) containing terminal aryl carboxylate groups, or (ii) effecting the above depolymerization in the presence of a compound containing at least two specified functional groups thereby to form a modified solvent-soluble low-molecular-weight polyester (component A') containing terminal aryl carboxylate groups; and
(2) either (i) mixing the resulting component A or A' with a monomeric or solvent-soluble polymeric, polyfunctional compound (component B) containing at least two hydroxyl and/or primary or secondary amino groups or (ii) partially reacting the resulting component A or A' with the component B. The composition has superior workability in molding and curing, and gives cured molded products of high utilitarian value. It is especially suitable for use in wire enamelling varnishes.

REFERENCES:
patent: 3444141 (1969-05-01), Shima
patent: 3446758 (1969-05-01), Wiener
patent: 3453240 (1969-07-01), Plaster et al.
patent: 3752866 (1973-08-01), Doerr
patent: 3778410 (1973-12-01), Kuhfuss et al.
patent: 3951886 (1976-04-01), Miyaka et al.

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