Interfacial process for preparing polyaromatic esters
AssigneeThe United States of America as represented by the Secretary of the Air Force
InventorsPaul Y. Chen, Carl S. Marvel
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Abstract
New, easily processable, polyaromatic esters were prepared from 2,2'-diiododiphenyl-4,4'-dicarbonyl dichloride, isophthaloyl chloride and/or terephthaloyl chloride in combination with 4,4'-isopropylidene diphenol, 4,4'-sulfonyldiphenol, or resorcinol by interfacial condensation. In these polymers, phenylacetylenyl groups can be easily introduced into the polymer chain by replacing the iodine. This process leads to soluble and curable polymers from which films can be prepared. After curing the polymers are insoluble and show excellent thermal and chemical resistance. The curing process increases the polymers' softening temperature about 20.degree. C.
Claims12
A process for synthesizing polyaromatic esters which comprises the steps of (A) forming a reaction mixture composed of equi-molar proportions of (1) a mixture 2,2'-diiododiphenyl-4,4'-dicarbonyl dichloride, isophthaloyl chloride, and terephthaloyl chloride;
- and (2) a dihydric phenol selected from the group consisting of 4,4'-isopropylidenediphenol, 4,4'-sulfonyldiphenol and resorcinol;
- (B) effecting a two-phase condensation reaction between said (1) and (2) to form a reaction product;
- and (C) separating the resultant reaction product.
A process for synthesizing polyaromatic esters which comprise the steps of (A) forming a reaction mixture composed of equi-molar proportions of (1) a mixture of 2,2'-diiododiphenyl-4-4'-dicarbonyl dichloride and isophthaloyl chloride;
- and (2) a dihydric phenol selected from the group consisting of 4,4'-sulfonyldiphenol, 4,4'-isopropylidenediphenol and resorcinol;
- (B) effecting a two-phase condensation reaction between said (1) and (2) to form a reaction product;
- and (C) separating the resultant reaction product.
A process for synthesizing polyaromatic esters which comprises the steps of (A) forming a reaction mixture composed of equi-molar proportions of (1) a mixture of 2,2'-diiododiphenyl-4,4'-dicarbonyl dichloride and terephthaloyl chloride;
- and (2) a dihydric phenol selected from the group consisting of 4,4'-isopropylidenediphenol, 4,4'-sulfonyldiphenol and resorcinol;
- (B) effecting a two-phase condensation reaction between said (1 ) and (2) to form a reaction product;
- and (C) separating said reaction product.
Dependencies are inferred from the claim text.