Silicone-modified pullulan, a composition comprising the same, and a cosmetic
AssigneeShin-Etsu Chemical Co., Ltd.
InventorHiroyuki Moriya
Life of this patent
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Abstract
The present invention provides a silicone-modified pullulan, the silicone-modified pullulan being an addition reaction product of the following components (a) and (b): (a) pullulan having a water content of 1.0 mass % or less and a calcium content of less than 100 ppm; and (b) isocyanate group-containing silicone represented by the formula (1), wherein the silicone-modified pullulan has a calcium content of less than 100 ppm and a content of the urea group-containing silicone represented by the formula (2) of less than 2,000 ppm.
Claims20
A silicone-modified pullulan, the silicone-modified pullulan being an addition reaction product of the following components (a) and (b):
- (a) pullulan having a water content of 1.0 mass % or less and a calcium content of less than 100 ppm;
- and
- (b) an isocyanate group-containing silicone represented by the following formula (1):
- wherein R1 is, independently of each other, a group selected from an alkyl group having 1 to 8 carbon atoms, a cycloalkyl group having 3 to 8 carbon atoms, a fluorine-substituted alkyl group having 1 to 8 carbon atoms, an aryl group having 6 to 12 carbon atoms, and an aralkyl group having 7 to 12 carbon atoms, R2 is an alkyl group having 1 to 4 carbon atoms or a phenyl group, n is an integer of 1 to 10, and α is an integer of 0 to 3,
- wherein the silicone-modified pullulan has a calcium content of less than 100 ppm and a content of the urea group-containing silicone represented by the following formula (2) of less than 2,000 ppm,
- wherein R1, R2, n and a are as described above.
A method for preparing a silicone-modified pullulan, wherein the method comprises steps of subjecting
- (a) pullulan having a water content of 1.0 mass % or less and a calcium content of less than 100 ppm;
- and
- (b) an isocyanate group-containing silicone represented by the following formula (1):
- wherein R1 is, independently of each other, a group selected from an alkyl group having 1 to 8 carbon atoms, a cycloalkyl group having 3 to 8 carbon atoms, a fluorine-substituted alkyl group having 1 to 8 carbon atoms, an aryl group having 6 to 12 carbon atoms, and an aralkyl group having 7 to 12 carbon atoms, R2 is an alkyl group having 1 to 4 carbon atoms or a phenyl group, n is an integer of 1 to 10, and α is an integer of 0 to 3, to an addition reaction to thereby obtain the silicone-modified pullulan, wherein the silicone-modified pullulan has a calcium content of less than 100 ppm and a content of the urea group-containing silicone represented by the following formula (2) of less than 2,000 ppm,
- wherein R1, R2, n and a are as described above.
Dependencies are inferred from the claim text.