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:
May. 07, 2019
Filed:
Jun. 30, 2014
Applicant:
Mitsubishi Gas Chemical Company, Inc., Tokyo, JP;
Inventors:
Assignee:
MITSUBISHI GAS CHEMICAL COMPANY, INC., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08G 65/10 (2006.01); C08G 65/30 (2006.01); C08K 5/13 (2006.01); C08K 5/3492 (2006.01); C08G 2/04 (2006.01); C08G 2/06 (2006.01); C08G 2/10 (2006.01); C08G 2/24 (2006.01); C08L 59/04 (2006.01);
U.S. Cl.
CPC ...
C08G 65/10 (2013.01); C08G 2/04 (2013.01); C08G 2/06 (2013.01); C08G 2/10 (2013.01); C08G 2/24 (2013.01); C08G 65/30 (2013.01); C08K 5/13 (2013.01); C08K 5/3492 (2013.01); C08L 59/04 (2013.01);
Abstract
The present invention provides a method for producing an oxymethylene copolymer which involves polymerizing trioxane and a comonomer cationically at a polymerization temperature of 135° C. to 300° C. in the presence of a protic acid salt having the molecular weight of 1000 or less, and at least one polymerization initiator selected from the group consisting of protic acids, protic acid anhydrides, and protic acid ester compounds having the molecular weight of 1000 or less.