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:
Jan. 17, 2017
Filed:
Apr. 04, 2014
Applicant:
Polyplastics Co., Ltd., Tokyo, JP;
Inventors:
Assignee:
POLYPLASTICS CO., LTD., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08G 2/24 (2006.01); C08G 2/10 (2006.01); C08G 2/06 (2006.01); C08G 2/22 (2006.01); C08G 4/00 (2006.01); C08L 59/04 (2006.01); C08G 2/12 (2006.01);
U.S. Cl.
CPC ...
C08G 2/24 (2013.01); C08G 2/06 (2013.01); C08G 2/10 (2013.01); C08G 2/22 (2013.01); C08G 4/00 (2013.01); C08L 59/04 (2013.01);
Abstract
A high-quality polyacetal copolymer produced by a simple process in an economical manner. The process includes supplying a raw material including trioxane and the like to a reaction device; setting the polymerization environmental temperature to no more than 100° C. until the reaction device conversion rate becomes 0.5, and then carrying out further polymerization; vaporizing and separating unreacted monomers from the reaction mixture at an environmental temperature of at least 115° C. and less than 140° C.; supplying the separated monomers to the raw material supply; and recovering the polyacetal copolymer from the reaction mixture.