Kao Corporation

Kao Germany Gmbh

Goldwell Gmbh

Bernd Nocker

Yoshinori Nishizawa

Akira Kiyomine

Frank Kufner

Alexandra Hullmann

Sabine Schafer

Jonathan Wood

Koichi Nakamura

Burkhard Rose

Shinobu Nagase

Hitoshi Sakaguchi

Kenichi Morita

Yukihiro Kondo

Hiroyuki Suzuki

Martin Uellner

Ina Brautigam

Alexandra Hullman

The present invention concerns a process for permanent shaping of human hair used both for the permanent waving of human hair with an excellent waving effect as well as for the straightening of curled hair. Accordingly, the first object of the present invention is a process for permanent shaping hair wherein an aqueous composition comprising at least one inorganic salt is applied onto hair and optionally processed up to 20 min and optionally rinsed off and subsequently a composition comprising at least one reducing agent is applied and rinsed off from hair after a processing time of 1 to 30 min and at a temperature of 20 to 45&#xb0; C. and a composition comprising at least one oxidizing agent is applied and processed for 1 to 20 min at a temperature range of 20 to 45&#xb0; C. and rinsed off from hair.

Process for permanent shaping of human hair

The present invention concerns a process for oxidative coloring keratin fibers especially human hair wherein a pretreatment is applied onto hair prior to application of oxidative coloring agent. Accordingly, present invention is a process for oxidative dyeing of keratin fibers especially human hair wherein an aqueous composition comprising at least one inorganic salt catalyzing and/or effecting the oxidative color development reaction from oxidative dye precursors is applied onto wet or dry hair and optionally rinsed off, and subsequently an aqueous composition comprising at least one oxidative dye precursor, optionally at least one coupling agent and at least one oxidizing agent is applied onto hair and after processing of 5 to 45 min with or without use of heat, preferably at a temperature range between 20 and 45&#xb0; C., rinsed off from hair.

Process for oxidative colouring keratin fibres

A permanent waving composition showing excellent waving properties and, at the same time, a hair conditioning effect contains

Composition for permanent waving of human hair

The object of the invention is a new isomer mixture of 3-hydroxybutyl monothioglycollate and 3-hydroxy-1-methyl propyl monothioglycollate in a weight proportion of about 1.5:1 to 4:1, preferably about 2:1 to about 3:1, comprising less than 5%, preferably less than 2% by wt., of 1,3-butanediol thioglycollate, and its use as the sole or main reducing agent in compositions for permanent waving of human hair. The compositions have reduced smell, good waving properties and an extremely low sensitizing potential on human skin.

1,3-butanediol thioglycollate isomer mixture and permanent waving

The object of the invention is a composition for permanent waving of human hair comprising, as sole or main reducing agent one or several polyglycol monothioglycollates or lactates of the general formula ##STR1## wherein R denotes a hydrogen atom or a methyl group, X represents an ethoxy or propoxy group, and n is a number from 2 to 5. These compositions have a low characteristic smell, good waving properties, and an extremely low skin sensitizing potential.

A permanent waving composition for human hair without any skin sensitizing effect comprises as reducing agent 1,3-propanediol monothioglycollate and 1,3-propanediol dithioglycollate alone or in admixture with other reducing agents, wherein the content of 1,3-propanediol dithioglycollate is not more than 10%, preferably less than 5% by wt., calculated to the monoester.

Growing community of inventors

Ober-Ramstadt, Germany

Bernd Nocker