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:
Jun. 17, 1980
Filed:
Jun. 13, 1978
Seibei Ono, Nagaokakyo, JP;
Koichi Shibuya, Takatsuki, JP;
Dainippon Ink and Chemicals, Inc., Tokyo, JP;
Abstract
A thermoplastic resin is colored with a carbon black pigment in the presence of a sulfonamide-substituted metal phthalocyanine dyestuff of the general formula ##STR1## wherein MePc is a metal phthalocyanine residue, R.sub.1 is a hydrogen atom or an alkyl group, R.sub.2 is an alkyl group, R.sub.3 is a hydrogen atom or an alkoxyalkyl group, R.sub.4 is an alkoxyalkyl group, m is an integer of 0 to 4, n is an integer of 0 to 4, and m+n is an integer of 1 to 4. The use of the specified metal phthalocyanine dyestuff affords a completely black or bluish black thermoplastic resin free from a reddish hue which is inherent to coloration with carbon black.