Cosmetic composition comprising hydrophilic organosilanes
The present disclosure relates to cosmetic compositions comprising an organosilane (A) having the formula: (R 1 ) n (R 2 O) (3-n) SiR 3 O(CH 2 CH 2 O) a (C 3 H 6 O) b R 4 where n is 1, 2, or 3, a≥1, b may vary from 0 to 30, with the proviso a≥b, R 1 is a hydrocarbon group containing 1 to 12 carbon atoms, R 2 is hydrogen or an alkyl group containing 1 to 6 carbon atoms, R 3 is a divalent hydrocarbon group containing 2 to 12 carbon atoms, R 4 is hydrogen, R 1 , or an acetyl group; and a cosmetic ingredient (B), and optionally in a cosmetically acceptable medium.
1. A method of hair conditioning to reduce frizzing of hair comprises the steps of
mixing
i. a hydrophilic organosilane (A) having the formula:
(R 1 ) (3-n) (R 2 O) n SiR 3 O(CH 2 CH 2 ) a (C 3 H 6 O) b R 4
where
n is 1, 2, or 3,
a≥1, b is 0 to 30, with the proviso a≥b,
R 1 is a hydrocarbon group containing 1 to 12 carbon atoms,
R 2 is hydrogen or an alkyl group containing 1 to 6 carbon atoms,
R 3 is a divalent hydrocarbon group containing 2 to 12 carbon atoms,
R 4 is hydrogen, R 1 , or an acetyl group
with water, thereby forming a mixture; and
ii. applying the of mixture to the hair;
iii. optionally letting the mixture stand on the hair for a standing time of from 10 seconds to 2 hours; and
iv. optionally rinsing the hair.
2. A method according to claim 1 where n is 2.
3. A method according to claim 1 where a ranges from 4 to 30.
4. A method according to claim 2 where a ranges from 4 to 30.
5. A method according to claim 1 where R 1 is methyl and R 2 is methyl or ethyl.
6. A method according to claim 4 where R 1 is methyl and R 2 is methyl or ethyl.
7. A method according to claim 1 where R 3 is propylene or —CH 2 CH 2 C(CH 3 ) 2 —.
8. A method according to claim 6 where R 3 is propylene or —CH 2 CH 2 C(CH 3 ) 2 —.
9. A method according to claim 1 where organosilane (A) has the formula: (CH 3 )(CH 3 CH 2 O) 2 Si CH 2 CH 2 CH 2 O(CH 2 CH 2 O) (a′) CH 3 , wherein a′ may vary from 4 to 30 and has an average value of 7.
10. A method according to claim 1 where organosilane (A) has the following formula: (CH 3 )(CH 3 O) 2 Si CH 2 CH 2 C(CH 3 ) 2 O(CH 2 CH 2 O) (a″) (C 3 H 6 O) (b″) H, wherein a″ may vary from 4 to 30 and has an average value of 18 and b″ may vary from 1-30 and has an average value of 18.
11. A method according to claim 1 where the hair care composition of (i) further comprises at least one ingredient selected from emollients, waxes, moisturizers, surface active materials, thickeners, water phase stabilizing agents, pH controlling agents, preservatives, cosmetic biocides, sebum absorbants, sebum control agents, vegetable extracts, botanical extracts, vitamins, proteins, amino-acids and their derivatives, pigments, fillers, silicone conditioning agents, cationic conditioning agents, UV absorbers, sunscreen agents, antioxidants, oxidizing agents, reducing agents, propellant gases, fatty alcohols, pearlising agents, chelating agents, film formers, styling agents, ceramides, suspending agents, or mixtures thereof.
12. A method according to claim 1 wherein (ii) comprises applying 1 to 50 grams of the hair care composition of (i) to the hair.
13. A method according to claim 1 wherein (ii) comprises applying 1 to 20 grams of the hair care composition of (i) to the hair.