Transparent water-silicon hair conditioning agent

Details Transparent water-silicon hair conditioning agent Transparent water-silicon hair conditioning agent

2002-01-09

2003-08-05

Page, Thurman K. (Department: 1615)

Drug, bio-affecting and body treating compositions

Live hair or scalp treating compositions

C427S070000, C427S070000, C427S070000, C427S401000, C427S071000, C427S070000, C427S070000, C427S070000, C427S070000, C427S070000, C427S070000, C514S937000

Reexamination Certificate

active

06602494

ABSTRACT:

This application is a 371 of PCT/8900/10134 filed Oct. 14, 2000.
The object of the invention is a hair conditioner which, in particular, can be used as a leave-in hair treatment or as a hair rinse, is in the form of an optically clear, transparent or at least translucent product and contains a silicone surfactant, a hydrophobic, nonsurfactant silicone compound present in the hair conditioner in liquid form, a basic or cationic nitrogen atom-containing hair conditioning compound and a nonionic, silicone-free surfactant.
As a rule, conventional hair-conditioning preparations such as rinse-off treatments or leave-on treatments are formulated on the basis of aqueous emulsions. Essential ingredients are cationic substances, for example cationic surfactants, hydrophobic substances, such as fatty alcohols and other oil components, emulsifiers and other specific agents and odorants. The most important ingredients are the cationic surfactants, fatty alcohols and emulsifiers. Schrader provides a review of the basic formulations of rinses and hair treatments in “Grundlagen und Rezepturen der Kosmetika” [Fundamentals and Formulations of Cosmetics], 2nd edition, 1989, pp. 728-737. The main function of hair conditioners is to improve the stylability, compatibility, luster and feel of the treated hair. The treated hair often feels somewhat heavier or more highly loaded, which is not always desirable. Moreover, the conventional oil-in-water [O/W] hair-care emulsions are normally milky white and opaque. Desirable are products which are in an optically more attractive form and clear, transparent or at least translucent. Various forms of clear hair-care compositions are known and described, for example, in E. Flick, “Cosmetic and Toiletry Formulations”, second edition, volume 2, pp. 373 ff. These clear hair-care compositions are based on polymers with a thickening action such as, for example, cellulose derivatives (tradenames Natrosol®, Methocel®), high-molecular-weight chitosan derivatives (tradename Kytamer® PC), complex polysaccharides (tradenames karaya gum, tragacanth, Jaguar® brands, Keltrol® brands) and acrylic acid polymers. All these prior art clear hair-care compositions have the serious drawback that their efficacy is so low that it does not even come close to that of a conventional hair-care compositions based on a mixture of a fatty alcohol and a quaternary surfactant. Moreover, the distributability of these clear products is not as good as that of conventional O/W hair-care emulsions. For this reason, these clear hair-care compositions known from the prior art do not sell as well as do the standard products.
The goal was therefore to provide a composition which meets the typical requirements placed on hair conditioners in terms of hair conditioning and distributability and at the same time is in an optically attractive, particularly optically clear or at least translucent form. We have now found that this goal can be reached by means of a hair conditioner having the composition described hereinbelow. The object of the invention is an optically clear, transparent or translucent hair conditioner in the form of a water-in-silicone oil emulsion containing
(A) at least one silicone surfactant selected from among the siloxane/polyoxyalkylene copolymers,
(B) at least one hydrophobic nonsurfactant silicone compound present in the hair conditioner in liquid form,
(C) at least one basic or cationic nitrogen atom-containing hair-conditioning compound,
(D) at least one nonionic silicone-free surfactant,
(E) 15 to 50 wt. % of water,
(F) 15 to 50 wt. % of at least one polyhydric alcohol and
(G) at least one electrolyte.
The entire silicone oil phase preferably represents less than 40 wt. % and particularly less than 20 wt. %, and the aqueous phase preferably more than 60 wt. % and particularly more than 80 wt. % of the overall composition. The hair conditioner meets very satisfactorily the requirements placed on hair conditioners in terms of conditioning action. The hair conditioner distributes itself readily on the hair. After the treatment, the hair is appreciably smoother and softer both in the wet and in the dry condition. The compatibility and stylability of the hair is better, and the hair is disentangled and lustrous. Moreover, the composition according to the invention makes it possible to produce the hair conditioner in an optically attractive, clear formulation which in turn permits advantageous packing in a transparent container made, for example, of glass or transparent plastic, for example polyethylene, polypropylene or polyethylene terephthalate.
The silicone surfactant (A) is present in the hair conditioner of the invention preferably in an amount from 0.01 to 10 wt. %, particularly from 0.1 to 5 wt. % and more preferably from 0.4 to 2 wt. %. Suitable silicones are the siloxane/polyoxyalkylene copolymers. These are siloxanes with polyalkylene oxide groups, particularly silicones modified with polypropylene oxide, polyethylene oxide or a mixture thereof. The alkylene oxide groups can be in a lateral or terminal position or the compounds can be linear polydimethylsiloxane/polyalkylene oxide block copolymers. The alkylene oxide-modified siloxanes have the INCI [International Nomenclature of Cosmetic Ingredients] designation “dimethicone copolyol”. Preferred silicone surfactants are those of general formula (I)
A—B
x
—D
y
—A  (I)
wherein
A stands for the monovalent group R
2
R
1
SiO
½
B denotes the divalent group R
2
SiO,
D denotes the divalent group RR
1
SiO,
R independent of each other denote H, C
1
-C
6
-alkyl or aryl, preferably H or C
1
-C
4
-alkyl and most preferably methyl,
R
1
stands for an oxyalkylene-containing group, hydrogen or methyl,
x denotes a numeral from 10 to 1000, preferably from 10 to 500 and particularly from 20 to 200, and
y denotes a numeral from 0 to 100 and preferably from 1 to 50, providing that the compound contains at least one oxyalkylene-containing R
1
group.
The R
1
group preferably denotes a group of general formula (II)
—R
2
(OC
n
H
2n
)
m
R
3
  (II)
wherein
R
2
is a divalent group linking the oxyalkylene unit to the siloxane chain, preferably C
p
H
2p
wherein p equals 2-8, preferably 2-6 and particularly 3-6;
R
3
is a monovalent end group for the oxyalkylene unit, for example H, OH, C
1
-C
6
-alkyl, aryl, C
1
-C
6
-alkoxy, C
1
-C
6
-acyloxy, but preferably OH,
n is a numeral from 2 to 4, and preferably 2 or 3, and
m is a numeral denoting at least unity, the sum of m for all oxyalkylene groups being about 10 or higher.
Suitable silicone surfactants are commercially available, for example DC 3225 C, DC Q2-5220, DC 193, DC 190 or DC Q4-3667 from Dow Corning, Silwet® L-7200 from OSI Specialties, Abil® B8830, Abil® B8851, Abil® B8863 or Abil® EM97 from Goldschmidt, SF-1 188 from General Electric or KF 353A from Shin Etsu.
The hydrophobic nonsurfactant-silicone compound (B) is preferably present in an amount from 5 to 30 wt. %, particularly from 7.5 to 25 wt. % and more preferably from 10 to 20 wt. %. Suitable in principle are all silicone compounds with hair conditioning properties and which are insoluble in the aqueous phase. Said silicone compounds may be highly volatile and of low molecular weight or low-volatile and of high molecular weight. In a preferred embodiment, the hair conditioner contains at least one low-molecular-weight, highly volatile and at least one high-molecular-weight, nonvolatile or low-volatile silicone. Nonvolatile silicones in the sense of this application are silicones with no or only low vapor pressure at normal ambient conditions (1 atmosphere, 25° C.). These silicones remain on the hair after they have been applied. Volatile silicones, on the other hand, vaporize after they have been applied to the hair, which under normal ambient condition typically occurs within a period of about 2 hours. The high-molecular-weight silicone, however, can also be a silicone polymer (silicone resin, silicone gum) dissolved in a low-molecular-weight liquid silicone. The viscosity o

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