The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 08, 1983
Filed:
Mar. 08, 1982
Hiroaki Sugimoto, Nara, JP;
Makoto Hanabata, Takatsuki, JP;
Sumitomo Chemical Company, Limited, Osaka, JP;
Abstract
A process for producing an aromatic polyester composition, which is characterized in that in producing an aromatic polyester represented by the general formula A, ##STR1## (wherein X is an alkylene group having 1 to 4 carbon atoms, --O--, --SO.sub.2 --, --S--, or --CO--; m and n are each 0 or 1; the ratio of d to e is in the range of from 1:1 to 10:1; the ratio of e to f is in the range of from 9:10 to 10:9; and the substituents attached to the benzene ring are in para or meta position to one another), the polymerization is carried out by the method of bulk polymerization, using substantially no solvent, and in the presence of at least one polymer selected from the group consisting of polyalkylene terephthalates, polyphenylene sulfides, aromatic polysulfones, and aromatic polyesters represented by the general formula B, ##STR2## wherein (p+q) is in the range of from 10 to 100 and p/(p+q).gtoreq.0.8.