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:
Jul. 29, 1980
Filed:
May. 09, 1979
Applicant:
Inventors:
Assignee:
Toyo Boseki Kabushiki Kaisha, Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08L / ;
U.S. Cl.
CPC ...
260 / ; 525-1 ; 525437 ; 525438 ;
Abstract
The present application provides a polyester composition composed of polyethylene terephthalate or a polyester containing at least 80 mol % of ethylene terephthalate repeating units and 0.1 to 15 weight %, based on the polyester, of an organic crystallization promoting agent having a polyoxyalkylene chain and at least one epoxy group. The latter promoting agents are represented by such materials as a glycidyl ether of a polyalkylene glycol having a molecular weight less than 5000. Such crystallization promoting agents serve to prevent streaks and pock marks on the surface of articles molded from such polyester compositions.