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:
Feb. 13, 1990
Filed:
Apr. 13, 1988
Applicant:
Inventors:
Nan-Loh Yang, Staten Island, NY (US);
Andrew Auerbach, Livingston, NJ (US);
James L Paul, Summit, NJ (US);
Rose Pesce, College Point, NY (US);
Shian S Wang, New York, NY (US);
Assignee:
Hoechst Celanese Corporation, Chatham, NJ (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08F / ; C08G / ;
U.S. Cl.
CPC ...
525412 ; 524 83 ; 524542 ; 528249 ;
Abstract
Acetal copolymers of trioxane and 1,3-dioxep-5-ene having a high degree of crystallinity and specific mole percent incorporations of 1,3-dioxep-5-ene are synthesized. The invention also provides a process for producing highly crystalline acetal copolymers by copolymerizing triozane and 1,3-dioxep-5-ene and precipitating the copolymer product from solution. The copolymers show much improved stability against halogen degradation.