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. 13, 1981
Filed:
Nov. 01, 1977
Minoru Handa, Machida, JP;
Takuzi Nishizawa, Machida, JP;
Hiroko Ogawa, Machida, JP;
Shinichiro Asai, Machida, JP;
Denki Kagaku Kogyo Kabushiki Kaisha, Tokyo, JP;
Abstract
Block copolymers of a vinyl-substituted aromatic hydrocarbon and a conjugated diene, having alkali metal atoms linked to at least one terminal of the polymer chain are obtained by polymerizing vinyl-substituted aromatic hydrocarbon and conjugated diene monomers with use of an alkali metal or organo alkali metal initiator. The block copolymer thus obtained is treated with a polar reactant to introduce polar groups into the polymer chain terminal. Compositions for paints and printing inks are prepared by incorporating inorganic pigments into the block copolymer having the terminal polar group.