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:
Sep. 10, 1991
Filed:
Jun. 05, 1989
Tsutomu Mano, Saitama, JP;
Jiro Kawase, Funabashi, JP;
Daisuke Misu, Wakayama, JP;
Michio Obayashi, Toyonaka, JP;
Kao Corporation, Tokyo, JP;
Abstract
A hair dyeing composition comprising a special developer and a coupling agent is disclosed. The developer is a 4-aminophenol derivative substituted at the 2-position which is represented by the following formula (I), ##STR1## in which X represents a group --NHCOR.sup.1 (R.sup.1 is a linear or branched alkyl group having 1-5 carbon atoms), a group --COOR.sup.2 [R.sup.2 is a hydrogen atom, a linear or branched alkyl group having 1-5 carbon atoms, a monohydroxy alkyl group having 1-5 carbon atoms, a polyhydroxy alkyl group having 1-5 carbon atoms, or a group --(CH.sub.2).sub.n NR.sup.3 R.sup.4 (R.sup.3 and R.sup.4 individually represent a hydrogen atom or a linear or branched alkyl group having 1-5 carbon atoms, and n denotes an integer of 1-5)], a group --CONHR.sup.2, a nitrile group, a group --SO.sub.3 R.sup.2, or a group --SO.sub.2 NR.sub.2.sup.2 (R.sup.2 has the same meaning as defined above and the two R.sup.2 s may be the same or different), or a salt thereof. The dye composition provides a high degree of saturation and vividness of colors as well as good fastness.