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. 25, 1982
Filed:
Dec. 19, 1980
Applicant:
Inventors:
Minoru Hamada, Kurashiki, JP;
Hisaya Sakurai, Kurashiki, JP;
Jyunzo Masamoto, Fuji, JP;
Takeo Yoshida, Kurashiki, JP;
Hiroshi Hazawa, Kurashiki, JP;
Assignee:
Asahi Kasei Kogyo Kabushiki Kaisha, Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
D06P / ;
U.S. Cl.
CPC ...
8442 ; 8506 ; 8582 ; 8583 ;
Abstract
This invention deals with the coloring or dyeing of polyoxymethylene resins and particularly with preventing color migration therein. Color migration in molded articles of colored polyoxymethylene resins is prevented by dyeing the articles with disperse dyes, and treating the articles with a compound having one or more isocyanate groups, for example, a urethane prepolymer.