Kao Corporation

Minoru Nagai

Tsutomu Fujimura

Yoshinori Takema

Toshiya Ono

Akira Yamamuro

Ayumi Ogawa

Yukihiro Ohashi

Akira Kawamata

Genji Imokawa

Yukihiro Yada

Masayoshi Nojiri

Kazuhiko Higuchi

Taketoshi Fujimori

Seiji Yamasaki

Hiromitsu Kawada

Noriko Ito

Yukiko Sakaino

Mayumi Tsuchiya

Hiroshi Kusuoku

Masahide Hoshino

Kazue Tsukahara

Koichi Murayama

Kiyoko Sugino

Provided is a hair cosmetic composition, which contains: (A) an organic polycarboxylic acid having from 5 to 40 carbon atoms in total and from 4 to 10 carboxy groups, or a salt thereof, and (B) an organic solvent selected from the group consisting of aromatic alcohols, N-alkylpyrrolidones, alkylene carbonates, polypropylene glycols, lactones and cyclic ketones, wherein the solvent has a ClogP of from &#x2212;2 to 3; which composition has a pH of from 2 to 5 at 25&#xb0; C. when diluted to 20 times the weight with water; and a hair quality improving method including the step of treating the hair with the hair cosmetic composition.

Hair cosmetic composition

Provided is a hair cosmetic composition, which contains the following components (A) and (B): (A) a hydroxy-free tricarboxylic acid having from 4 to 20 carbon atoms in total, or salt thereof, and (B) at least one or more organic solvents selected from the group consisting of aromatic alcohols, N-alkylpyrrolidones, alkylene carbonates, polypropylene glycols, lactones and cyclic ketones, wherein the organic solvent has a ClogP of from &#x2212;2 to 3; and wherein the hair cosmetic composition has a pH of from 2 to 5 at 25&#xb0; C. when diluted to 20 times the weight with water. Provided also is a hair quality improving method which comprises treating the hair with the hair cosmetic composition. The hair cosmetic composition of the present invention can for example give strength/body, manageability, and set retention property to the hair which is apt to be dry and moistureless owing to the damage by coloring, permanent waving, or repetition of excessive blow drying.

Wrinkling modifiers

The invention relates to wrinkling modifiers and anti-aging cosmetic compositions which each comprise a guanidine derivative represented by the following general formula (1):

Method of modifying wrinkles using guanidine derivatives

A guanidine derivative represented by formula (1), (2), (3) or its acid addition salt and a production process thereof

Guanidine derivatives and process for their production

A wrinkle-care product, an aging-preventive cosmetic and a skin cosmetic each comprising a guanidine derivative of formula (I) or an acid addition salt thereof: ##STR1## wherein R1 represents a hydrogen atom, a lower alkyl group or --(AO).sub.m --(BO).sub.n --D--E �wherein A and B may be the same or different and each represents an alkylene group having 2 to 8 carbon atoms; D represents a binding hand, --CO--, or an unsubstituted or substituted alkylene group having 1 to 6 carbon atoms; E represents a hydrogen atom, a lower alkyl group, an aralkyl group or an unsubstituted or substituted aryl group; m is a number of from 1 to 6; and n is a number of from 0 to 6!; k is a number of from 1 to 10; and G represents a hydrogen atom, a hydroxyl group, a carboxyl group, a sulfonate group or a phosphate group. These products are excellent in the effects of inhibiting wrinkling and smoothing wrinkles without damaging the physiological conditions of the skin.

Wrinkle-care product

Amide derivatives and external skin or hair care preparations

A guanidine derivative represented by formula (1), (2), (3) or its acid addition salt and a production process thereof ##STR1## wherein each of A and B is a C.sub.2 -C.sub.8 alkylene, D is a single bond, --CO-- or a C.sub.1 -C.sub.5 alkylene, E is H, a lower alkyl or the like, m is 1 to 6, n is 0 to 6 and R.sup.1 is H, a lower alkyl or the like, l is 1 to 10 and G is H, --OH or the like and a skin cosmetic containing the same. It can exert excellent keratin layer softening effect continuously for a long period of time.

Cosmetics containing guanidine derivatives

A composition for external skin care comprising an amine derivative represented by the following formula (1), ##STR1## wherein R.sup.1 is a linear, branched, or cyclic saturated or unsaturated hydrocarbon group having 4-40 carbon atoms, and R.sup.2, R.sup.3, R.sup.4, R.sup.5, and R.sup.6 are individually a hydrogen atom or a hydrocarbon group having 1-10 carbon atoms, which may be substituted or unsubstituted by 1 or more hydroxy groups; or an acid addition salt thereof, in an amount from 0.0001 to less than 0.1% by weight; and a method of curing wrinkles and keratinization of the skin characterized by applying said amine derivative or its salt to the skin.

Composition for external skin care

Growing community of inventors

Tokyo, Japan

Minoru Nagai