Drug – bio-affecting and body treating compositions – Preparations characterized by special physical form – Cosmetic – antiperspirant – dentifrice
Patent
1996-11-22
1998-09-22
Page, Thurman K.
Drug, bio-affecting and body treating compositions
Preparations characterized by special physical form
Cosmetic, antiperspirant, dentifrice
424 7012, 424 7015, 424 7016, A61K 748
Patent
active
058111093
DESCRIPTION:
BRIEF SUMMARY
TECHINCAL FIELD
The present invention relates to hair cosmetic compositions. More particularly, this invention relates to liquid hair cosmetic compositions containing silicone-grafted hair styling polymers having improved long term product stability, hair feel attributes and ease of removal and brush out as well as excellent style retention properties.
BACKGROUND OF THE INVENTION
The desire to have the hair retain a particular shape is widely held. A common methodology for accomplishing this is applying hair styling, or "setting" compositions to the hair, typically to damp or dry hair. These compositions provide temporary setting benefits, and should be removable by water and/or by shampooing. The materials used in the compositions to provide the setting benefits are generally applied in the form of mousses, gels, lotions or sprays.
High levels of style retention, or hold, are typically expected from hair styling compositions applied as a spray. Style retention is typically achieved by the use of resins, such as AMPHOMER, supplied by National Starch, and GANTREZ SP 225, supplied by GAF. As used in commercially sold hairspray products, these resins generally have a weight average molecular weight of from about 40,000 to about 150,000.
When such resins are incorporated into pump and aerosol hairsprays, they can provide suitable style retention attributes. However, such resins are found to be deficient in the area of hair feel and can give a stiff hair feel.
Recently, it has been found that certain neutralisable polymers having silicone macromer portions can provide good style retention benefits to the hair while also providing improved hair feel. In other words, such silicone macromer-containing polymers can impart a tactile sense of softness and conditioning to the hair relative to conventional, non-silicone-containing resins without the tacky hair feel traditionally associated with non-silicone hair fixative polymers. Silicone macromer-containing hair styling polymers and formulations containing them are disclosed, for example, in EP-A-0,408,311 A2 issued Jan. 11th 1991, Hayama, et al., U.S. Pat. No.5,061,481, issued Oct. 29th 1991, Suzuki et al., U.S. Pat. No.5,106,609, Bolich et al., issued Apr. 21st 1992, U.S. Pat. No. 5,100,658, Bolich et al., issued Mar. 31st 1992, U.S. Pat. No. 5,100,657, Ansher-Jackson, et al., issued Mar. 31st 1992 and U.S. Pat. No. 5,104,646, Bolich et al., issued Apr. 14th 1992.
It is well known that at least partial neutralisation of the silicone macromer-containing hair styling polymer is necessary to maximise its utility in hair styling compositions. Typically, silicone grafted co-polymers neutralised with potassium hydroxide exhibit good solubility in hairspray compositions containing 15% water. However, potassium hydroxide neutralised systems are less soluble in compositions which contain lower levels of water and lead to hazy, colloidal systems. Moreover, silicone grafted co-polymers which are neutralised with organic neutralisers are found to lead to a somewhat tacky hair feel and are not easily removed from the hair by washing or brush-out.
Thus a need exists for hair styling compositions which have a clear appearance, deliver effective style retention, impart a hair conditioning effect, have a non-sticky hair feel, are easily brushed out and at the same time have stable product and viscosity characteristics and remain fully stable under long term and stressed temperature storage.
SUMMARY OF THE INVENTION
According to one aspect of the invention, there is provided a liquid hair cosmetic composition comprising: silicone-containing polycarboxylic acid copolymer having a vinyl polymeric backbone, and having grafted to the backbone a silicone-contaning macromer having a weight average molecular weight of from about 1,000 to about 50,000; present at a level sufficient to neutralise at least about 25% of the acid groups on the silicone-containing copolymer;
The essential, as well as the optional, components of the present invention are described below. All levels and rat
REFERENCES:
patent: 4192861 (1980-03-01), Micchelli et al.
patent: 4693935 (1987-09-01), Mazurek
patent: 5100658 (1992-03-01), Bolich, Jr. et al.
patent: 5104646 (1992-04-01), Bolich, Jr. et al.
patent: 5106609 (1992-04-01), Bolich, Jr. et al.
patent: 5565193 (1996-10-01), Midha
Cooper Elizabeth Claire
Welch Rosemary Jane
Faulkner D.
Henderson Loretta J.
Page Thurman K.
Rosnell Tara M.
The Procter & Gamble & Company
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