Hair treatment compositions

Details Hair treatment compositions Hair treatment compositions

2002-04-30

2004-02-24

Venkat, Jyothsna (Department: 1615)

Drug, bio-affecting and body treating compositions

Live hair or scalp treating compositions

Polymer containing

C424S070100, C424S070270

Reexamination Certificate

active

06696051

ABSTRACT:

FIELD OF THE INVENTION
This invention relates to rinse-off hair conditioner compositions and to their use in the treatment of hair.
BACKGROUND AND PRIOR ART
Shampoo compositions are generally formulated with highly effective cleansing surfactants, typically anionic surfactants, and do not in themselves provide much conditioning or styling benefit to the hair. In fact, basic shampoo formulations which have not been supplemented with specific conditioning or styling agents have a tendency to leave the hair in a cosmetically-unsatisfactory condition with regards to manageability and stylability. The hair tends to have a harsh, dull and dry feel, often referred to as “creak”, is often difficult to comb, in either the wet or the dry state, typically has poor brushing properties, and tends to have poor set-retaining abilities.
This has resulted in the use of products containing specific conditioning and/or styling agents. Such agents are generally applied separately after shampooing and rinsing the hair, for example, in the form of conditioner formulations or styling mousses etc.
Conventional conditioner formulations, although providing substantial improvements in for example the wet and dry combing properties of the hair and in the smoothness of the hair, do not in themselves impart styling attributes such as body and volume to the hair. If fact, conventional conditioners tend to have a negative effect on many of the attributes associated with hair body.
One of the most common methods for imparting styling benefits to the hair has been the use of hair fixative agents, such as high molecular weight polymers. The problem with using such agents is that they have a tendency to negatively impact on conditioning attributes such as wet and dry stage clean feel and smoothness. In fact, they can result in a sticky feel to the hair.
Conventional styling polymers are typically water soluble. This means that when incorporated into a conditioner which is rinsed off the hair, there is a tendency for the styling polymer to be washed away to a greater or lesser degree with the conditioner. Hence, most styling products are leave-in products which are applied to the hair as post-conditioner treatments.
The problem being addressed by the present invention is the provision of rinse-off conditioner compositions which impart styling benefits, and in particular body benefits on the hair, but which do not negatively impact on the conditioning benefits imparted by the conditioner. The body benefits or attributes the present invention is looking particularly to provide are root lift, increased hair volume, bounce, control (i.e. ease of styling) and manageability, i.e. maintenance of style without undue stiffness and negative sensory feel. Such body attributes are particularly attractive to people with fine or long, weighty hair.
One approach that has been taken to address this problem has been the use different forms of styling agents such as small particulate materials. Such an approach is described, for example, in our unpublished PCT International Patent Application No. PCT/GB00/04020. This document describes the use of small hard particles, and in particular colloidal silica, in hair treatment compositions to impart body and volume to the hair. Although providing significant styling benefits, the use of these materials can still lead to small levels of sensory negatives, such as for example a dry feel to the hair.
We have now found that the inclusion of a certain level of small solid particles covalently grafted with a silicone polymer in conventional conditioner formulations provides substantial styling benefits, in particular with regards to imparting body attributes to the hair. Furthermore, the conditioning attributes of conditioner compositions containing these particles are not compromised. The compositions are also stable.
JP 10144622 (Toshiba Silicone) discloses cosmetic compositions containing from 0.5 to 50 wt % of particles consisting of colloidal silica cores surrounded by silicone shells which may be used on the skin or hair. Hairdressing lotions, hair creams and cleansing compositions such as a shampoo, rinse and conditioner are disclosed as suitable cosmetic compositions in which the particles can by utilised. In the treatment of hair, they are described as providing a flexible and smooth feeling and as having good set-retaining ability. There is no teaching that the particles provide significant body benefits, such as volume, root lift and bounce, to the hair.
Although JP 10144622 discloses that the core-shell particles may be used in a shampoo composition, only nonionic surfactants are identified as being useful additional surfactant components when making up cosmetic compositions comprising the particles. Nonionic surfactants are also disclosed as improving the stability of the cosmetic compositions. Anionic surfactants and cationic surfactants are discussed at length with respect to pre-emulsification of the particles, but there is no mention of and no examples demonstrating the inclusion of such surfactants as additional components when making up the cosmetic compositions. Example 13 in JP 10144622 describes a shampoo composition comprising 20 wt % nonionic surfactant, less than 0.01 wt % anionic surfactant and more than 1 wt % core-shell particles.
We have found that the incorporation of the small particles covalently grafted with silicone polymer into conventional conditioner compositions leads to substantive improvements in the body of the conditioned hair, especially if a subsequent styling regime is followed. The compositions impart body attributes, such as are root lift, volume, bounce and manageability, in the absence (or substantial absence) of a styling polymer, which leads to compositions which have a styling benefit, but nevertheless do not suffer from the sensory negatives (e.g. stickiness and/or dry feel) which are associated with prior styling compositions which are based on, for example, a styling polymer.
DEFINITION OF THE INVENTION
Accordingly, this invention provides an aqueous conditioner composition comprising
(i) a cationic surfactant;
(ii) a fatty alcohol material; and
(iii) from 0.01 to 10 wt % of coated particles comprising
(a) a solid core having a D3,2 average particle size in the range from 10 to 700 nm, and
(b) a coating of silicone polymer covalently bonded to the solid core.
Additionally, this invention provides for use of coated particles as defined above in a conditioner composition to impart body to hair.
DETAILED DESCRIPTION AND PREFERRED EMBODIMENTS
Definitions
Unless specified otherwise, all wt % values quoted hereinafter are percentages by weight based on total weight of the conditioner composition.
As used hereinafter, the term “coated particle” refers to a particle comprising a solid core having a D3,2 average particle size in the range 10 to 700 nm which is coated, via covalent grafting, with a silicone polymer, the polymer forming a coating or shell around the solid core.
As used hereinafter, the term “solid core” or “solid core particle” refers to the solid core of the coated particle.
As used hereinafter, the term “coating polymer” or “polymer coating” refers to the silicone polymer covalently grafted to the solid core of the coated particle.
As used hereinafter, the term “water-insoluble”, means that the material is soluble in distilled water at a concentration of less than 0.01 g/l, preferably less than 0.001 g/l at 20° C.
As used hereinafter, the term “aggregates” refers to secondary particles which are a collection of primary particles which have been fused to form face to face sintered structures which cannot be dissociated, and as such are relatively hard.
D
3,2
average droplet or particle sizes as referred to herein may be measured by means of a laser light scattering technique, using a 2600D Particle Sizer from Malvern Instruments.
Coated Particles
The coated particles are present in the conditioner composition in an amount of from 0.01 to 10, preferably from 0.01 to 5, more preferably from 0.05 to 3, yet more preferably from 0.05

Affiliated with

Also associated with

Rating

Hair treatment compositions does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Hair treatment compositions, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Hair treatment compositions will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3347859