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US5086127A
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Silicone UV absorbers containing silane units
Assignee: Shin-Etsu Chemical Co Ltd
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Filing: 1990-01-30
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Granted: 1992-02-04
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Expires: 2010-01-30
Abstract
Abstract Organic silicon compounds comprising in the molecule thereof, a polysilane structural unit: -(R 1 R 2 Si) n - and a structural unit: R 3 a SiO.sub.(4-a)/2 absorb UV in the range of 300-400 nm and are well soluble in organic solvent. These compounds are useful UV absorbers for cosmetic compositions.
Inventors
- 👤 Kunio Itoh
- 👤 Mitsuo Umemura
- 👤 Eiichi Tabei
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 18:28
CPC Classifications
A; A61; A61K; A61K8/00; A61K8/18; A61K8/72; A61K8/84; A61K8/89; A61K8/891; A61K8/895; A61Q; A61Q17/00; A61Q17/04; C; C08; C08G; C08G77/00; C08G77/48; C08G77/50; C08L; C08L83/00; C08L83/14
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
168 words
A UV absorber comprising an organic silicon compound containing in its molecule at least one polysilane structural unit of the formula: --(R.sup.1 R.sup.2 Si).sub.n -- (1) wherein R 1 is a substituted or unsubstituted alkyl radical having 1 to 10 carbon atoms, R 2 is a radical selected from the group consisting of substituted or unsubstituted alkyl radicals having 3 to 10 carbon atoms, cycloalkyl radicals having 5 to 10 carbon atoms, and aryl radicals having 6 to 10 carbon atoms, and letter n is an integer of 5 to 50, and at least one structural unit of the formula: R.sup.3.sub.a SiO.sub.(4-a)/2 ( 2) wherein R 3 is a radical selected from the group consisting of a hydrogen atom, a hydroxyl radical, a substituted or unsubstituted monovalent hydrocarbon radical having 1 to 10 carbon atoms, and OR 4 wherein R 4 is a substituted or unsubstituted monovalent hydrocarbon radical having 1 to 4 carbon atoms, and letter a is a positive number in the range of 0<a ≦4.
Claim 2
Dependent Claim
168 words
A UV absorber comprising an organic silicon compound containing in its molecule at least one polysilane structural unit of the formula: --(R.sup.1 R.sup.2 Si).sub.n -- (1) wherein R 1 is a substituted or unsubstituted alkyl radical having 1 to 10 carbon atoms, R 2 is a radical selected from the group consisting of substituted or unsubstituted alkyl radicals having 3 to 10 carbon atoms, cycloalkyl radicals having 5 to 10 carbon atoms, and aryl radicals having 6 to 10 carbon atoms, and letter n is an integer of 5 to 50, and at least one structural unit of the formula: R.sup.3.sub.a SiO.sub.(4-a)/2 ( 2) wherein R 3 is a radical selected from the group consisting of a hydrogen atom, a hydroxyl radical, a substituted or unsubstituted monovalent hydrocarbon radical having 1 to 10 carbon atoms, and OR 4 wherein R 4 is a substituted or unsubstituted monovalent hydrocarbon radical having 1 to 4 carbon atoms, and letter a is a positive number in the range of 0<a ≦4.
Claim 3
Dependent Claim
128 words
The UV absorber of claim 1 wherein said organic silicon compound is of the formula: ##STR12## wherein R 1 , R 2 , and n are as defined above; R 5 through R 13 are independently selected from the group consisting of alkyl radicals having 1 to 3 carbon atoms, alkenyl radicals having 2 to 6 carbon atoms, and aryl radicals having 6 to 10 carbon atoms; A is an alkylene radical having 1 to 6 carbon atoms; Y is selected from the group consisting of a hydrogen atom, a hydroxyl radical, alkyl radicals having 1 to 3 carbon atoms, alkenyl radicals having 2 to 6 carbon atoms, and aryl radicals having 6 to 10 carbon atoms; letters b and c are independently numbers of at least 1.
Claim 4
Dependent Claim
137 words
The UV absorber of claim 1 wherein said organic silicon compound is of the formula: Y-(R.sup.1 R.sup.2 Si).sub.n -A-(R.sup.14 R.sup.15 SiO)-(R.sup.16 R.sup.17 SiO).sub.d -(SiR.sup.18 R.sup.19 R.sup.20) wherein R 1 , R 2 , and n are as defined above; A is an alkylene radical having 1 to 6 carbon atoms; Y is selected from the group consisting of a hydrogen atom, a hydroxyl radical, alkyl radicals having 1 to 3 carbon atoms, alkenyl radicals having 2 to 6 carbon atoms, and aryl radicals having 6 to 10 carbon atoms; R 14 through R 20 are independently selected from the group consisting of alkyl radicals having 1 to 3 carbon atoms, alkenyl radicals having 2 to 6 carbon atoms, and aryl radicals having 6 to 10 carbon atoms; and letter d is a number of at least 1.
Claim 5
Dependent Claim
88 words
The UV absorber of claim 1 wherein said organic silicon compound is of the formula: ##STR13## wherein R 1 , R 2 , and n are as defined above; A is an alkylene radical having 1 to 6 carbon atoms; R 14 through R 20 are independently selected from the group consisting of alkyl radicals having 1 to 3 carbon atoms, alkenyl radicals having 2 to 6 carbon atoms, and aryl radicals having 6 to 10 carbon atoms; and letter d is a number of at least 1.
Claim 6
Dependent Claim
105 words
The UV absorber of claim 1 wherein said organic silicon compound is of the formula: (R.sup.22 O).sub.3-e -R.sup.21.sub.e Si-A-(R.sup.1 R.sup.2 Si).sub.n -A-SiR.sup.21.sub.e (OR.sup.22).sub.3-e wherein R 1 , R 2 , and n are as defined above; A is an alkylene radical having 1 to 6 carbon atoms; R 21 is selected from the group consisting of alkyl radicals having 1 to 3 carbon atoms, alkenyl radicals having 2 to 6 carbon atoms, and aryl radicals having 6 to 10 carbon atoms; R 22 is selected from the group consisting of lower alkyl radicals and trialkylsilyl radicals; and letter e is equal to 0 or 1.
Claim 7
Dependent Claim
19 words
The UV absorber of claim 1 wherein letter n of formula (1) is an integer of 10 to 20.
Claim 8
Dependent Claim
40 words
The UV absorber of claim 1 wherein the organic silicon compound is of the formula ##STR14## wherein R 1 , R 2 , and n are as defined above; letters b and c are independently numbers of at least 1.
Claim 9
Dependent Claim
36 words
The UV absorber of claim 1 wherein the organic silicon compound is of the formula: ##STR15## wherein R 1 , R 2 and n are defined above; letter d is a number of at least 1.
Claim 10
Dependent Claim
38 words
The UV absorber of claim 1 wherein the organic silicon compound is of the formula: ##STR16## wherein R 1 , R 2 , and an are as defined above; letter d is a number of at least 1.
Claim 11
Dependent Claim
38 words
The UV absorber of claim 1 wherein the organic silicon compound is of the formula: ##STR17## wherein R 1 , R 2 , and n are as defined above; letter d is a number of at least 1.
Claim 12
Dependent Claim
29 words
The UV absorber of claim 1 wherein the organic silicon compound is of the formula: ##STR18## wherein R 1 , R 2 , and n are as defined above.
References Cited (Backward Citations)
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