DESCRIPTION
Hair care composition
Technical Field
[0001] The present invention relates to a hair care composition comprising specific
silicone oil blend, hydrophobic oil and high-molecular amino-modified silicone with good
stability and providing superior sensory feeling, shine, light feel and non-tacky feel on
human hair. Preferably, the hair care composition is a non hydrous, leave on, hair oil
composition.
Background Art
[0002] Consumers oil hair both pre wash and post wash. Pre wash oiling is done as it is
believed that oils nourish hair and protect it during the wash process. Post wash oiling is
done for manageability and styling. The oiling habit is widely practiced by around 800
million people across the Central Asia and Middle East region. Some vegetable oil (ex.
Coconut oil) is most common oil used in the Central Asia and Middle East region for hair
care. In spite of its high level of conditioning benefits on human hair, such vegetable oil is
with the drawback of greasy feel.
[0003] In the conventional technology, for improving sensory feeling of human hair,
silicone oil or other hydrophobic oil (ex. Light liquid paraffin) were widely formulated in
hair cosmetic applications including hair oil (see US5362484A, US5306434A,
EP1767190) . Additionally, some combination of volatile and non-volatile silicone as hair
oil is disclosed in US5286476.
[0004] However, generally speaking, silicone oil is poor in its compatibility with other
non-silicone oils and mixture oil including organic oils and silicone oils easily become a
haze appearance in container of cosmetic products. Furthermore, conventional mixed oil
composition including silicone oil is insufficient in sensory feeling and conditioning
benefit. That is to say, in conventional oil composition, a good balance was not achieved
between oily components to enough extent that solely used silicone or non-silicone oil
component provides its advantageous properties on human hair.
[0005] Aforementioned related arts fail to disclose a hair care composition comprising
hair care composition comprising silicone oil blend of volatile/non-volatile silicone oil,
oily mixture including vegetable oils and amino-modified . And there is no teach or
suggestion to provide a hair care composition comprising specific silicone oil blend,
hydrophobic oil and high-molecular amino-modified silicone. Furthermore, these arts are
perfectly silent to preferable ratio between silicone oil blend and high-molecular amino-
modified silicone in hair care composition and related technical effects.
Disclosure of Invention
[0006] We, present inventors, have found that a hair care composition which comprises
a specific blend of volatile/non-volatile silicone oil, hydrophobic non-silicone oil including
at least one vegetable oil and high-molecular amino-modified silicones can deliver an
equivalent level of conditioning benefits with superior sensory feeling. A further advantage
associated with hair oils according to the invention is shine, light feel and non-tacky feel
on human hair. That is to say, the invention is a hair care composition comprising:
(A) a silicone blend oil obtained by mixing one or more volatile silicone oil (al) and
one or more non-volatile silicone oil (a2);
(B) a hydrophobic oil selected from hydrocarbon oil, vegetable oil and mixture thereof;
and
(C) an amino-modified silicone having a viscosity of more than 1,000 mPas at 25 C.
[0007] Preferably, the component (A) is a transparent silicone blend oil obtained by
mixing specific volatile/non-volatile silicone oils, the component (B) is a mixture of
vegetable oil and light liquid paraffin in the ratio of 20:80 to 80:20 by weight, and the
component (C) is an ammo-modified silicone selected from amino-modified
methylpolysiloxane and amino-modified phenylmethylsilsesquioxane. Furthermore, to
achieve a most stable and clear composition including various oils, the preferable weight
ratio of component (A) : component (C) ranges from 3:1 to 5:1. Optionally, the hair care
composition further comprises (D) antioxidant or other cosmetic ingredients. Especially, as
(D) antioxidant, ascorbic acid is preferable to stabilize the system well and no pink
discoloring on the composition.
Effects of Invention
[0008] The inventive hair care composition characterized by said technical features
have excellent compatibility in water-immiscible oils and keep clear appearance after a
storage. Furthermore, the hair care composition is useful especially in non hydrous leave
on composition especially for keratin fiber such as human hair (ex. hair oil) with superior
sensory feeling, shine, light feel and non-tacky feel.
Detailed Description of the Invention
[0009] Component (A) is a silicone blend oil obtained by mixing one or more volatile
silicone oil (a1) and one or more non-volatile silicone oil (a2), and preferably, the silicone
oil blend keeps transparent appearance without including water, air bubbles or colored
impurity. Such transparent silicone blends is obtained by mixing volatile and non volatile
silicone together. The obtained blends are highly compatible with non-silicone oils
including other water-immiscible oils which may be a mineral oil, vegetable oil or a
mixture thereof. It also helps in delivering of various high molecular weights amino
silicone in water immiscible oil, otherwise not compatible.
[0010] The transparent silicone blend oil is preferably obtained by mixing of one or
more volatile methyl polysiloxane having 3 to 20 Si atoms (a1-1), one or more non-volatile
silicone oil selected from phenyl silsesquioxane and C6-20 alkylheptamethyltrisiloxane
(a2-1) and optionally hydrocarbon oil (a-3).
[0011] As the volatile silicone oil (a1), low-molecular cyclic-siloxane, low-molecular
linear-siloxane and mixture thereof can be used. More specifically, The volatile silicone oil
is generally a low molecular weight silicone oil, and most typically a cyclic alkyl siloxane
of the formula (R''' 2Si0) d or a linear alkyl siloxane of the formula R'" 3Si0(R''' 2Si0) eSiR'''
3 in which R''' is an alkyl group containing 1-6 carbon atoms, d is 3-6 and e is 0-5. Most
preferred, however, are volatile cyclic methyl siloxanes of the formula { (CH 3) 2Si0} d and
volatile linear methyl siloxanes of the formula (CH3) 3Si0{ (CH3) 2Si0} eSi (CH 3) 3 and in
which d is 3-6 and e is 0-5, respectively. Preferably, the volatile methyl siloxane has a
boiling point less than 250° C. and a viscosity of 0.65-10.0 centistoke (mm 2/s). Some
representative linear volatile methyl siloxanes are hexamethyldisiloxane (MM) with a
boiling point of 100° C, viscosity of 0. 65 mm 2/s, and formula Me 3SiOSiMe 3;
octamethyltrisiloxane (MDM) with a boiling point of 152° C, viscosity of 1.04 mm 2/s, and
formula Me 3SiOMe 2SiOSiMe 3; decamethyltetrasiloxane (MD 2M) with a boiling point
of 194° C, viscosity of 1.53 mm 2/s, and formula Me 3SiO (Me 2SiO) 2SiMe 3;
dodecamethylpentasiloxane (MD 3M) with a boiling point of 229° C, viscosity of 2.06 mm
2/s, and formula Me 3SiO (Me 2SiO) 3SiMe 3; tetradecamethylhexasiloxane (MD 4M) with a
boiling point of 245° C, viscosity of 2.63 mm /s, and formula Me 3SiO (Me 2SiO) 4SiMe
3: and hexadecamethylheptasiloxane (MD 5M) with a boiling point of 270° C, viscosity of
3.24 mm 2/s, and formula Me 3Si0 (Me 2SiO) 5SiMe 3. Me in these and the following
formulas represents the methyl group CH 3. Some representative cyclic volatile methyl
siloxanes are hexamethylcyclotrisiloxane (D 3), a solid at room temperature, with a boiling
point of 134° C. and formula (Me 2SiO) 3; octamethylcyclotetrasiloxane (D 4) with a
boiling point of 176° C, viscosity of 2.3 mm /s, and formula (Me 2S1O) 4;
decamethylcyclopentasiloxane (D 5) with a boiling point of 210° C, viscosity of 3.87
mm2/s, and formula (Me 2SiO) 5; and dodecamethylcyclohexasiloxane (D 5) with a boiling
point of 245° C, viscosity of 6.62 mm 2/s, and formula (Me 2Si0)) 6-
[0012] As the non-volatile silicone oil (a2), high-molecular polysiloxane (including
silicone gum), silsesquioxane having branched structure in a molecular, liquid silicone
resins, highly-hydrophobic functional group-modified siloxane and mixture thereof can be
used. More specifically, nonvolatile silicone oils of the present invention may include
silicone gum and those which conform to the formula:
R13 SiO(R12SiO) n (R1R2SiO)m SiR13
where n and m have a value to provide polymers with a viscosity in the range of about 100-
1,000 centistokes (mm2 /sec) .
R1andR2 are alkyl radicals of 1-20 carbon atoms, or an aryl group such as phenyl.
Typically, the value of n is about 80-375. Illustrative polysiloxanes are
polydirnethylsiloxane, polydiethylsiloxane, polymethylethylsiloxane,
polymethylphenylsiloxane, and polydiphenylsiloxane. These linear silicone materials may
generally have viscosity values of from 20 centistokes but no more than about 100,000
centistokes, but preferably in the range of 20 centistokes to 12,500 est, as measured under
ambient conditions. Specific non limiting examples of suitable nonvolatile silicone fluids
include Dow Corning Q7-9120 Silicone Fluids (Dimethicone NF) .
As the non-volatile silicone oil (a2), the silicone gum is also useful in this invention.
Generally, the viscosity of the silicone gum is from 10,000,000 centistokes and may have
its plasticity properties at room temperature. The silicone gum is a high molecular weight,
most typically a silanol(-OH) functional polymer, but including polydirnethylsiloxane
gums as well. Such gums are known in the art and are readily available commercially from
vendors such as the Dow Coming Corporation, Midland, Mich. Such materials have a
structure generallv corresponding to the formula:
R1R22 SiO (R12SiO) n (R2R3SiO)n SiR22 R1
in which n and m are integers of 5,000-50,000, preferably 10,000-50,000. R1 represents -
OH; an alkyl group having 1-6 carbon atoms such as methyl, ethyl, or propyl; an aryl
group such as phenyl or xenyl; an alkaryl group such as tolyl or xylyl; or an aralkyl group
such as benzyl, phenylethyl, or 2-phenylpropyl. R2 represents an alkyl group having 1-6
carbon atoms such as methyl, ethyl, or propyl; an aryl group such as phenyl or xenyl; an
alkaryl group such as tolyl or xylyl; or an aralkyl group such as benzyl, phenylethyl, or 2-
phenylpropyl. Silicone gums in which R is an alkenyl group such as vinyl or an amino
group can also be employed. Most preferred, however, are silicone gums in which R is -
OH group and R2 is methyl; and silicone gums in which both R1 and R2 are methyl.
Preferably, for easy handling property, the silicone gum is formulated in the hair care
composition of this invention as a low-viscosity solution with volatile silicone oil (a1).
[0013] The silicone blend oil is optionally obtained by mixing said component (a1),
(a2) and hydrocarbon oil (a-3) in optional amount. The substantial example for component
(a-3) is similar to following hydrocarbon oils in component (B). Preferred component (a-3)
is isoparaffin: branched chain hydrocarbons (e.g. ISOPAR L and ISOPAR V from Exon
Corp.)
[0014] When the total weight percentage of overall component (A) is 100 weight %,
the preferable mixing ratio for each components ranges as followings.
Component (al): the occupied ratio ranges from 30 to 95 weight % preferably, ranges
from 60 to 45 weight %.
Component (a2): the occupied ratio ranges from 5 to 50 weight %, preferably, ranges
from 10 to 45 weight %.
Optional Component (a3): the occupied ratio ranges from 0 to 20 weight %, preferably,
ranges from 0 to 10 weight % and less than the weight of component;(a2) in the
composition.
[0015] Component (B) is a hydrophobic non-silicone oil including at least one
vegetable oil (or a hydrophobic oil selected from hydrocarbon oil, vegetable oil and
mixture thereof). Preferably, the component (B) is a mixture of vegetable oil and
hydrocarbon oil, and in the ratio of 20:80 to 80:20 by weight. Such oil mixture is
sometimes defined as "type-2" hair oil Most preferable one is a mixture of vegetable oil
(ex. Coconut oil) and light liquid paraffin in the ratio of 30:70 to 70:30 by weight.
[0016] Preferred vegetable oil is a cosmetic oil ingredients from vegetables and
including glyceride fatty esters. By "glyceride fatty esters" is meant the mono-, di-, and
trimesters formed between glycerol and long chain carboxylic acids such as C6-C30
carboxylic acids. The carboxylic acids may be saturated or unsaturated or contain
hydrophilic groups such as hydroxyl. Preferred glyceride fatty esters are derived from
carboxylic acids of carbon chain length ranging from C6 to C24, preferably C10 to C22,
most preferably C12 to C18. Preferred vegetable oil for use in hair care composition (ex.
hair oil) of the invention will generally have a viscosity at ambient temperature (25 to
30[deg.] C.) of from 0.01 to 0.8 Pa.s preferably from 0.015 to 0.6 Pa.s, more preferably
from 0/02 to 0.065 Pa.s.
[0017] As vegetable oil of component (B), a variety of fats and oils derived from
vegetable can be applied in this invention, such as camellia oil, coconut oil, castor oil,
safflower oil, sunflower oil, peanut oil, cottonseed oil, corn oil, olive oil, almond oil,
avocado oil, palm oil, sesame oil, lanolin and soybean oil. The glyceride fatty esters in
these vegetable oils have various ranges of carbon chain lengths depending on the source,
typically between about 12 to about 18 carbon atoms. Coconut oil, sunflower oil, almond
oil and mixtures thereof are particularly preferred. These vegetable oils may be present in
hair care composition of the invention as a single material or as a blend.
[0018] As hydrocarbon oil of component (B), cyclic hydrocarbons, straight chain
aliphatic hydrocarbons (saturated or unsaturated), and branched chain aliphatic
hydrocarbons (saturated or unsaturated) can be applied in the invention. Straight chain
hydrocarbon oils will typically contain from about 6 to about 16 carbon atoms, preferably
from about 8 up to about 14 carbon atoms. Branched chain hydrocarbon oils can and
typically may contain higher numbers of carbon atoms, e.g. from about 6 up to about 20
carbon atoms, preferably from about 8 up to about 18 carbon atoms. Suitable hydrocarbon
oils of the invention will generally have a viscosity at ambient temperature (25 to 30[deg.]
C.) of from 0.0001 to 0.5 Pa.s, preferably from 0.001 to 0.05 Pa.s, more preferably from
0.001 to 0.02Pa.s.
[0019] A preferred hydrocarbon oil is light mineral oil including "light liquid
paraffin". Mineral oils are clear oily liquids obtained from petroleum oil, from which
waxes have been removed, and the more volatile fractions removed by distillation. The
fraction distilling between 250[deg.] C. to 300[deg.] C. is termed mineral oil, and it
consists of a mixture of hydrocarbons, in which the number of carbon atoms per
hydrocarbon molecule generally ranges from C10 to C40. Mineral oil may be characterized
in terms of its viscosity, where light mineral oil is relatively less viscous than heavy
mineral oil, and these terms are defined more specifically in the U.S. Pharmacopoeia, 22nd
revision, p. 899 (1990). Other hydrocarbon oils that may be used in the invention include
relatively lower molecular weight hydrocarbons including linear saturated hydrocarbons
such a tetradecane, hexadecane, and octadecane, cyclic hydrocarbons such as
dioctylcyclohexane (e.g. CETIOL S from Henkel), branched chain hydrocarbons (e.g.
ISOPAR L and ISOPAR V from Exxon Corp.). The hydrocarbon oil may be present in hair
care composition of the invention as a single material or as a blend.
[0020] As component (B), particularly preferred are blends of [coconut oil and/or
sunflower oil and/or almond oil] and light mineral oil, in which the [coconut oil and/or
sunflower oil and/or almond oil]:light mineral oil weight ratio is 60:40.
[0021] Component (C) is amino-modified silicone having a viscosity of more than
1,000 mPas at 25 C. Such amino-modified silicone can be exemplified by a silicone having
in its molecule a silicon atom bonded to a 2-aminoethyl group, 3-aminopropyl group, N-
cyclohexyl-3-aminopropyl group, N-(2-aminoethyl)-3-aminopropyl group, or a similar
amino group. Examples of the amino-modified silicone include those having
aforementioned amino groups grafted to a silicone backbone, those having an amino group
bonded to either one end of a silicone backbone, those having amino groups bonded to
both ends of a silicone backbone, those having amino groups at both ends of a silicone
backbone and an amino group grafted to the silicone backbone, and those having a silicone
side chain and an amino group both grafted to a silicone backbone. Preferably, the amino-
modified silicone is those selected from amino-modified methylpolysiloxane and amino-
modified phenylmethylsilsesquioxane. More preferably, Trimethylsiloxy-terminated,
Aminopropyl-, Phenyl Silsesquioxanes are exemplified as such component (C).
[0022] The weight ratio of component (A) : component (C) ranges from 3:1 to 10:1,
preferably 3.5:1 to 5:1. Most preferably, the weight ratio is 4:1. All the blends have better
stability and clarity.
[0023] In the hair care composition of this invention, the amount of component (A) is
0.5 to 10 % by weight of total amount of the composition, the amount of component (B) is
80 to 99 % by weight of total amount of the composition, and the amount of component
(C) is 0.5 to 10 % by weight of total amount of the composition.
[0024] The hair care composition of this invention may further comprise some
common antioxidants. Especially, in conventional coconut oil-based hair oil, we can see
mainly tert-Butylhydroquinone (TBHQ) and Butylated hydroxytoluene (BHT) as common
antioxidants. Examples of other common antioxidants as component (D) includes
butylphenol, phytic acid, Vitamin D group, Vitamin E and ascorbic acid (including
Vitamin C). However, to avoid discoloring issue with amino-modified silicone etc, as
component (D), ascorbic acid is preferable to stabilize the system well and no pink
discoloring on the composition.
[0025] Other Oily Materials
Other oily materials may also be present in combination with said component (A) to (D) in
hair care composition of the invention. Suitable additional oily materials include other fatty
esters, fatty alcohols and fatty ethers. In general, fatty esters, fatty alcohols and ethers are
characterized by having at least 10 carbon atoms, and include esters and ethers with
hydrocarbyl chains derived from fatty acids or alcohols, e.g., monocarboxylic acid esters,
polyhydric alcohol esters, and di- and tricarboxylic acid esters and ethers, and fatty
alcohols with a carbon chain carbon chain length of between 10 and 18, e.g. lauryl alcohol,
cetyl alcohol or cetostearyl alcohol. Examples include isopropyl myristate, isopropyl
palmitate, cetearyl isononanoate, cetearyl octanoate, diethylene glycol monoethyl ether
oleate, dicaprylyl ether, caprylic acid/capric acid propylene glycol diester and mixtures of
any of the above.
[0026] The total content of other oily material in hair care composition of the
invention preferably ranges from 0.01% to 50%, more preferably from 1.0% to 20%, by
weight based on total weight of the hair care composition.
[0027] Hair care composition: Product form
The hair care composition of this invention may include shampoo, hair rinse, hair
treatments, hair set lotion, blow styling lotion, hair spray, foam styling agent, jet styling
agent, hair liquid, hair tonic, hair cream, hair growth accelerator, hair nourishment, hair
dye, hair dressing, or similar hair cosmetics. However, preferred hair care composition is a
hair oil composition. The composition is non hydrous form, i.e. used as neat hair oil. The
hair oil composition is usually used as leave on type hair oil composition for human keratin
fiber.
[0028] Optional Ingredients
Compositions of this invention may contain any other ingredient normally used in hair
treatment formulations. These other ingredients may include, viscosity modifiers,
preservatives, colouring agents, polyols such as glycerine and polypropylene glycol,
chelating agents such as EDTA, vitamin E acetate, fragrances, antimicrobials and
sunscreens and lipid soluble ingredients e.g. fatty acids or sterols. Each of these ingredients
will be present in an amount effective to accomplish its purpose. Generally these optional
ingredients are included individually at a level of up to about 5% by weight of the total hair
care composition.
Examples
[0029] The following examples are included to demonstrate embodiments of the
invention. It should be appreciated by those of skill in the art that the techniques .
disclosed in the examples which follow represent techniques discovered by the inventor to
function well in the practice of the invention, and thus may be considered to constitute
typical modes for its practice. However, those of skill in the art should, in light of the
present disclosure, appreciate that many changes may be made in the specific embodiments
which are disclosed and still obtain a like or similar result without departing from the spirit
and scope of the invention. All percentages are in wt. %.
[0030] Example 1 : Preparation of Blended Silicone-containing Oil
As shown in following Table 1., 8 of anhydrous blended silicone-containing oils (Ml to
M8) were prepared by mixing one or more volatile silicone oil, one or more non-volatile
silicone oil and optionally a hydrophobic non-silicone oil. After initial screening, following
8 blends were considered for detail panel study.

*1: A cyclosiloxane blend of D4:D5=80:20, more preferably 85:15
*2: Dow Corning 2-1184 fluid (blend of cyclosiloxane and dimethylpolysiloxane)
*3: Light Liquid paraffin preferable Isopar L
[0032] In current study we have used in Type 2 hair oil where 60% Coconut oil and
40% Isopar L was used with several antioxidant and perfumes. It is light yellow color
transparent oil. Several combinations of volatile and non volatile silicones were tried with
organic solvents (mainly hydrocarbon oils) like Isopar L, Iso dodcane, Finsolv T. After
initial screening following 8 blends were considered for detail panel study.
[0033] Example 2 : Sensory Evaluation of Hair oils
Among aforementioned 8 blends, detail panel study for sensory testing of above developed
anhydrous blends was operated for Ml and M4 blends. Above blended samples were tested
for detail sensory evaluation using human panel study. In the panel total 5 trained panelist
were selected where 4:1 (male : female) ratio was maintain. The evaluation was operated
by said trained panelist as following. The items of sensory evaluations are shown in Table
2.
(1) The practical example (unlabeled) and control sample (unlabeled) were used by same
panelist independently.
- Control Sample: Type 2 hair oil where 60% Coconut oil and 40% Isopar L was
used with several antioxidant and perfumes.
- Practical Examples: 90/95wt% of aforementioned Type 2 hair oil +1/5 wt% of
M1/M4 blends.
(2) All panelists have to score their observations on 0 to 5 scales, where 0 is worst and 5
is best
(3) Regarding each evaluation items, the evaluation of practical example (comprising
M1/M4 blend) was sorted if the practical example was got even or higher score
compared with the score of control sample. Then, the number of panelist was
recorded independently.
[0035] Based on total score from all panelists Ml and M4 blends found to be
satisfactory and Table 2 shows the detail comparison on same with control sample.
Especially, regarding evaluation items of "hair shine" and "hair softness", all panelists
evaluate the practical examples (including M1/M4 blends) higher than control samples.
[0036] Example 3 : Temporal Stability of Hair Oil Formulation
Blend Ml and M4 as options found satisfactory and in rest study we will focus on same
and tried both with actual hair oil formulations in various dosages and keep the sample for
stability study As shown in following Table 3., hair oil compositions (F-1 to F-4
formulations) including base Type 2 hair oil, Amino-modified silicone and M1/M4 blends
were prepared by mixing these components homogeneously. The temporal stability was
checked and recorded in following Table 3. at room temperature and 45 C both after
storage for one-month.
[0038] As shown in Table 3., It was observed that 4% of developed blend is sufficient
to give clear appearance for hair oil. In current study we have used type II hair oil having
60% coconut oil and 40 % hydrocarbon oil. This blend was selected from 90 to 95%
according to dosage of Ml and M4. Maximum dosage of Ml and M4 were 8% while
minimum was 4% as same was showing very good sensory profile in above study. Hence
from above study we can fix Ml and amino-modified silicone having a viscosity of more
than 1,000 mPas at 25 C concentrations as 4: 1 ratio for stable formulations. However after
some time we can see pink color in the formulation and mixture was clear.
[0039] Effect of Antioxidants and interactions with silicones
To investigate further we tried to understand roll of antioxidants present in coconut oil and
what roll they are playing with silicones. After doing series of experiments by changing
components showed in table 3, we could indentified that the pink color was mainly
develop by reaction of antioxidants and amine functionality of silicone polymer. To
overcome such coloration issue we have added antioxidants in the formulation. These are
mainly proton donor so in general term we can say they are acid while amines (in silicone
amino silicone polymer) are acceptor and work as week base. When we mixed antioxidant
and amino silicone polymer with help of Ml we can see a pink complex development
which can be more intense as antioxidant or amino silicone polymer concentration
increases. In coconut oil we can see mainly tert-Butylhydroquinone (TBHQ) and Butylated
hydroxytoluene (BHT) as common antioxidants. The possible complex structures with
amino silicone polymer are shown in following figure.
(left) tert-Butylhydroquinone (TBHQ) and amLno-modified silicone having a viscosity of
more than 1,000 mPas at 25 C complex
(right) Butylatedhydroxytoluene (BHT) and amino-modified silicone having a viscosity
of more than 1,000 mPas at 25 C complex
[0040] Example 4 : Effect of Antioxidants (Vitamin C etc.) in the Hair oil
formulation
To overcome such complex formation we tried several other ingredients including week
organic acids. Based on formulation trials we have stabilized certain organic week acid in
the oil formulation then it act as sacrificing ingredient and react first with amine and stop
further reaction with antioxidants and amino silicone polymer. However the concentration
needs to be optimized otherwise amine can quaternized and precipitate out by loosing
clarity. After several optimization experiments we can see by suing 0.01% ascorbic acid
(i.e. Vitamin C) we can stabilized the system well and no pink color was observe. Apart
from ascorbic acid we tried lactic acid, salicylic acid, acetic acid and several fatty acids but
none of them work accordingly.
[0041] Following two prototypes (Table 4.1 & 4.2) were finalized using Ml, amino
silicone polymer, Type II. hair oil, silicone gum blends, volatile cyclic siloxanes and
ascorbic acid. They found satisfactory on stability and sensory.

* 1: Light liquid paraffin preferable type is Isopar L
*2: Dow Corning 2078 (sales product name)
*3: Silicone gum blend obtained by mixing SH200-10cs and Silicone gum having a
viscosity of more than 100,000,000 cs at 25C.
CLAIMS
1. A hair care composition comprising:
. (A) a silicone oil blend obtained by mixing one or more volatile silicone oil (a1) and
one or more non-volatile silicone oil (a2);
(B) a hydrophobic oil selected from hydrocarbon oil, vegetable oil and mixture thereof;
and
(C) an amino-modified silicone having a viscosity of more than 1,000 mPas at 25 C.
2. The hair care composition of claim 1, wherein the amount of component (A) is 0.5
to 10 % by weight of total amount of the composition,
the amount of component (B) is 80 to 99 % by weight of total amount of the
composition,
the amount of component (C) is 0.5 to 10 % by weight of total amount of the
composition.
3. The hair care composition of claim 1, wherein the component (A) is a transparent
silicone blend oil obtained by mixing of one or more volatile methyl polysiloxane
having 3 to 20 Si atoms (a1-1), one or more non-volatile silicone oil selected from
phenyl silsesquioxane and C6-20 alkylheptamethyltrisiloxane (a2-1) and optionally
hydrocarbon oil (a-3).
4. The hair care composition of claim 1, wherein the component (B) is a mixture of
vegetable oil and light liquid paraffin in the ratio of 20:80 to 80:20 by weight.
5. The hair care composition of claim 1, wherein the component (C) is an amino-
modified silicone selected from amino-modified methylpolysiloxane and amino-
modified phenylmethylsilsesquioxane.
6. The hair care composition of any of claim 1 to' 5, wherein the weight ratio of
component (A): component (C) ranges from 3:1 to 5:1.
7. The hair care composition of any of claim 1 to 6, further comprises (D) antioxidant.
8. The hair care composition of any of claim 1 to 7, wherein the hair care composition
is a hair oil composition.
9. The hair care composition of any of claim 1 to 8, wherein the hair care composition
is a non hydrous, leave on type hair oil composition for human keratin fiber.

ABSTRACT

A hair care composition comprising:(A) a silicone blend oil obtained by mixing one or
more volatile silicone oil (a1) and one or more non-volatile silicone oil (a2);(B) a
hydrophobic oil selected from hydrocarbon oil, vegetable oil and mixture thereof; and
(C) an ammo-modified silicone having a viscosity of more than 1,000 mPas at 25 C, and
the preferable weight ratio of component (A) : component (C) ranges from 3:1 to 5:1.
The hair care composition is stable and provides superior sensory feeling, shine, light
feel and non-tacky feel to human hair.