SILICONE-CONTAINING COMPOSITION AND PERSONAL CARE PRODUCTS CONTAINING SAME
A silicone composition, especially advantageous for incorporation in a personal care product, includes a silicone resin (a) and a silicone gum (b), the mixture of resin (a) and gum (b) having a softening point of 50° C. or greater and an elastic modulus at ambient temperature of 10 6 Pa or less.
1 - 20 . (canceled)
21 . A composition which comprises:
a) a MT resin having a molecular weight higher than 10,000 and containing one or more M units of the formula R 1 3 SiO 1/2 , and T units of the formula R 3 SiO 3/2 wherein the ratio of M to T units ranges from 1:1 to 1:7, and the softening point of the MT resin ranges from 50° C. to 110° C. wherein each R 1 and R 3 is independently a hydroxyl radical or monovalent hydrocarbon radical; and,
b) silicone gum,
wherein the mixture of MT resin (a) and silicone gum (b) is non-crosslinked and has a softening point greater than 50° C. and an elastic modulus at ambient temperature of less than 10 6 Pa.
22 . The composition of claim 21 wherein silicone gum (b) possesses a viscosity of from 300 to 200,000,000 centipoise at 25° C.
23 . The composition of claim 21 wherein silicone gum (b) contains one or more M′ units of the formula R 4 3 SiO 1/2 and one or more additional units selected from amongst D′ units of the formula R 5 2 SiO 2/2 , T′ units of the formula R 6 SiO 3/2 and Q′ units of the formula SiO 4/2 , and mixtures thereof, wherein each R 4 , R 5 and R 6 is independently a hydroxyl radical or a monovalent hydrocarbon radical.
24 . The composition of claim 21 wherein silicone gum (b) is selected from the group consisting of dimethiconol gum, dimethicone gum, polydimethysiloxane gum, amodimethicone, phenyl-modified silicone, silicone block copolymers containing amine groups or quat groups and alkyl-modified aminosilicone.
25 . The composition of claim 21 wherein the weight ratio of silicone resin (a) to silicone gum (b) ranges from 0.4 to 6.
26 . The composition of claim 21 wherein the softening point of the MT resin ranges from 60° C. to 110° C.
27 . The composition of claim 21 wherein the softening point of the MT resin ranges from 70° C. to 110° C.
28 . The composition of claim 21 which is cationic surfactant-free.
29 . The composition of claim 21 further comprising a solvent for the mixture of silicone resin (a) and silicone gum (b).
30 . The composition of claim 29 wherein the solvent is a volatile organic solvent or organosilicon-containing volatile solvent.
31 . A personal care product which comprises:
a) a MT resin having a molecular weight higher than 10,000 and containing one or more M units of the formula R 1 3 SiO 1/2 , and T units of the formula R 3 SiO 3/2 wherein the ratio of M to T units ranges from 1:1 to 1:7, and the softening point of the MT resin ranges from 50° C. to 110° C. wherein each R 1 and R 3 is independently a hydroxyl radical or monovalent hydrocarbon radical; and,
b) silicone gum,
wherein the mixture of MT resin (a) and silicone gum (b) is non-crosslinked and has a softening point greater than 50° C. and an elastic modulus at ambient temperature of less than 10 6 Pa.
32 . The personal care product of claim 31 wherein silicone gum (b) possesses a viscosity of from 300 to 200,000,000 centipoise at 25° C.
33 . The personal care product of claim 31 wherein silicone gum (b) contains one or more M′ units of the formula R 4 3 SiO 1/2 and one or more additional units selected from amongst D′ units of the formula R 5 2 SiO 2/2 , T′ units of the formula R 6 SiO 3/2 and Q′ units of the formula SiO 4/2 , and mixtures thereof, wherein each R 4 , R 5 and R 6 is independently a hydroxyl radical or a monovalent hydrocarbon radical.
34 . The personal care product of claim 31 wherein silicone gum (b) is selected from the group consisting of dimethiconol gum, dimethicone gum, polydimethysiloxane gum, amodimethicone, phenyl-modified silicone, silicone block copolymers containing amine groups or quat groups and alkyl-modified aminosilicone.
35 . The personal care product of claim 31 wherein the weight ratio of silicone resin (a) to silicone gum (b) ranges from 0.4 to 6.
36 . The personal care product of claim 31 wherein the softening point of the MT resin ranges from 60° C. to 110° C.
37 . The personal care product of claim 31 wherein the softening point of the MT resin ranges from 70° C. to 110° C.
38 . The personal care product of claim 31 wherein the personal care product is cationic surfactant-free.
39 . The personal care product of claim 31 wherein the personal care product is a hair care product or a lip gloss.
40 . The personal care product of claim 31 further comprising a solvent for the mixture of silicone resin (a) and silicone gum (b).
41 . The personal care product of claim 40 wherein the solvent is a volatile organic solvent or organosilicon-containing volatile solvent.