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. 10, 1990
Filed:
Nov. 20, 1989
Applicant:
Inventors:
Tetsuo Matsumoto, Aichi, JP;
Keizo Tsujimoto, Aichi, JP;
Katsuto Matsuzawa, Tokyo, JP;
Shunichiro Hamada, Aichi, JP;
Kouzi Shinogi, Aichi, JP;
Satomi Nagai, Aichi, JP;
Takayuki Imamura, Aichi, JP;
Akiko Kuroyanagi, Aichi, JP;
Assignee:
Nippon Ester Co., Ltd., Aichi, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C08G / ;
U.S. Cl.
CPC ...
528272 ; 528286 ; 528287 ; 528296 ; 528303 ; 5283081 ; 528398 ; 524116 ; 524117 ; 524129 ; 524136 ; 524139 ; 524147 ; 524603 ; 524706 ; 523506 ;
Abstract
A polyester, wherein pendent phosphorus atoms are bound to the main chain of the polyester, having an excellent flame resistance and a high intrinsic viscosity can be stably produced without deteriorating the properties of said polyester by preliminarily copolymerizing a polyester with a specific unsaturated compound and then reacting the unsaturated bond thus-formed with a specific phosphorus compound having a P-H bond.