CN-110214002-B - Aqueous silicone dispersion, coating and cosmetic

Abstract

An aqueous silicone dispersion which is an aqueous silicone dispersion that forms an elastomer coating by drying at room temperature, and which comprises (A) an organopolysiloxane (A-1) containing an alkenyl group having 2 or more alkenyl groups in 1 molecule, (A-2) an organopolysiloxane having 3 or more hydrosilyl groups in 1 molecule, and an organosilicon elastomer that is the product of the addition reaction of a linear diorganopolysiloxane (A-3) having hydrosilyl groups at both ends of the molecular chain, (B) an anionic surfactant, (C) a nonionic surfactant, (D) colloidal silica, and (E) water.

Inventors

• INOKUCHI YOSHINORI

Assignees

• 信越化学工业株式会社

Dates

Publication Date

20260508

Application Date

20180111

Priority Date

20170120

Claims (5)

1. 1. An aqueous silicone dispersion in which the following (a) silicone elastomer is dispersed, which is an aqueous silicone dispersion that is dried at normal temperature to form an elastomer coating film, comprising: (A) An organosilicon elastomer which is an addition reaction product of an organopolysiloxane (A-1) containing alkenyl groups represented by the following average composition formula (1) and an organopolysiloxane (A-2) containing 3 or more hydrosilyl groups represented by the following average composition formula (6) and a linear diorganohydrogen polysiloxane (A-3) containing hydrosilyl groups only at both ends of a molecular chain represented by the following average composition formula (11), wherein the mass ratio (A-2) of the (A-2) component and the (A-3) component (A-2) is 5:95 to 90:10, R 1 a R 2 b SiO (4-a-b)/2 (1) Wherein R 1 is independently a substituted or unsubstituted hydrocarbon group of 1 to 30 carbon atoms which does not include an alkenyl group, R 2 is independently an alkenyl group of 2 to 6 carbon atoms, a, b are positive numbers satisfying 0< a <3, 0<b≤3 and 0.1≤a+b≤3, R 3 w H x SiO (4-w-x)/2 (6) Wherein R 3 is independently a substituted or unsubstituted hydrocarbon group of1 to 30 carbon atoms excluding alkenyl groups, w and x are positive numbers satisfying 0< w <3, 0< x <3 and 0.1 < w+x <3, Wherein R 4 is independently a substituted or unsubstituted hydrocarbon group of 1 to 30 carbon atoms excluding alkenyl groups, s1 is a positive number of 5 to 1000, (B) 0.1 to 5 parts by mass of an anionic surfactant per 100 parts by mass of the component (A), (C) The nonionic surfactant is contained in an amount of 0 to 2 parts by mass per 100 parts by mass of the component (A), (D) 0 to 35 parts by mass of colloidal silica per 100 parts by mass of the component (A), and (E) 15 to 200 parts by mass of water per 100 parts by mass of the total of the component (A) and the component (D), The film is a film which satisfies the conditions that, in the measurement of an elastomer sheet having a thickness of 1mm as a 25 ℃ dried product of the aqueous silicone dispersion, Based on the test method specified in the Japanese rubber Association standard specification, asker C rubber hardness is 5 or more and 60 or less, According to the test method defined in JIS K6251, the elongation at break is 20% or more, and the tensile strength at break is 0.05MPa or more and 5.0MPa or less.
2. 2. The aqueous silicone dispersion according to claim 1, wherein the component (a-3) is a linear diorganohydrogen polysiloxane having 2 hydrosilyl groups at both molecular chain ends per molecule.
3. 3. An elastomer coating film obtained by drying the aqueous silicone dispersion according to any one of claims 1 to 2 at room temperature.
4. 4. Cosmetic comprising the aqueous silicone dispersion according to any one of claims 1 to 2.
5. 5. The cosmetic according to claim 4, which is a cosmetic selected from the group consisting of make-up cosmetics, skin care cosmetics and cosmetics for eyelashes.

Description

Aqueous silicone dispersion, coating and cosmetic Technical Field The present invention relates to an aqueous dispersion, a coating film, and a cosmetic, each of which is dried at room temperature to form an elastomer coating film. Background The aqueous silicone dispersion which forms an elastomer coating film upon drying has hitherto been composed of various compositions, and is used as a fiber treatment agent, a coating agent for rubber, a coating agent for building materials, a coating agent for paper and plastic films, or the like, or an additive thereof, in order to impart slidability, water repellency, and peelability. As a method for forming the elastomer film, there is a method in which the condensation reaction of the silicone is simultaneously performed during drying. Examples of the composition of the method include an emulsion composition comprising a hydroxylated diorganopolysiloxane, a polysiloxane having a silicon-bonded hydrogen atom and a curing catalyst in U.S. Pat. No. 3098833 (patent document 1), an emulsion composition comprising a polydiorganosiloxane having both ends of the molecular chain blocked with hydroxyl groups in Japanese patent publication No. 38-860 (patent document 2), a polyorganosiloxane, an alkyl polysilicate and a tin salt of a fatty acid, an organopolysiloxane latex composition comprising a polydiorganosiloxane having both ends of the molecular chain blocked with hydroxyl groups in Japanese patent publication No. 53-130752 (patent document 3), a silane having at least three hydrolyzable groups and a curing catalyst in Japanese patent publication No. 3294725 (patent document 4), and an organopolysiloxane emulsion composition comprising a hydroxylated diorganopolysiloxane, a trialkoxysilane and colloidal silica in Japanese patent publication No. 54-131661 (patent document 5). However, when the elastomer coating is formed by the condensation reaction of the silicone while drying these components, the reaction is generally carried out by heating at 100 to 300 ℃. In addition, materials that are unsuitable for cosmetics are unsuitable because they cannot be heated on the skin. JP-A-7-196984 (patent document 6) proposes a silicone emulsion composition in which an emulsion of an amino group-containing organopolysiloxane and an epoxy group-containing hydrolyzable silane are mixed and dispersed, or a silicone emulsion composition in which an emulsion of an epoxy group-containing organopolysiloxane and an amino group-containing hydrolyzable silane are mixed and dispersed. The reaction rate of amino groups with epoxy groups is high, and in particular, in cosmetics such as make-up cosmetics and skin care cosmetics, the amino groups and epoxy groups are applied to the skin and the make-up film is held on the skin for a long period of time, and there is a concern about safety to the skin. There is a method of forming a coating film of a silicone elastomer by simultaneously utilizing an addition reaction of an alkenylsilyl group and a hydrosilyl group during drying. As the composition thereof, for example, an emulsion comprising a molecular chain terminal vinyl-terminated polydiorganosiloxane, a polyorganohydrogen polysiloxane and a platinum catalyst has been proposed in Japanese patent application laid-open No. 50-94082 (patent document 7), and an emulsion comprising a polydiorganosiloxane containing a vinyl group at a molecular chain terminal or side chain, a polysiloxane having a silicon-bonded hydrogen atom, colloidal silica and a platinum catalyst has been proposed in Japanese patent application laid-open No. 54-52160 (patent document 8). However, in these compositions, if a hydrosilyl-containing siloxane is allowed to coexist with a platinum catalyst, the reaction proceeds with time or hydrogen gas is generated, and therefore, it is necessary to mix an emulsion of silicone with the platinum catalyst before use. For general consumers who use cosmetics, the liquid is mixed and then the hands are not called. Japanese patent application laid-open No. 56-36546 (patent document 9) proposes a method of adding a platinum catalyst to a emulsion containing a polydiorganosiloxane having both ends of a molecular chain blocked with vinyl groups and a polyorganosiloxane to prepare an emulsion of a crosslinked silicone elastomer, or a method of further blending colloidal silica into the emulsion of the silicone elastomer. However, in this composition, the addition reaction of the vinylsilyl group and the hydrosilyl group is completed, but the composition is dried to form an elastomer coating film. However, the film has the disadvantage of no elongation and brittleness. Prior art literature Patent literature Patent document 1 U.S. Pat. No. 3098833 Patent document 2 Japanese patent publication No. 38-860 Patent document 3 Japanese patent laid-open No. 53-130752 Patent document 4 U.S. Pat. No. 3294725 Patent document 5 Japanese patent laid-open No. 54-131661 Patent document 6 Japanese patent lai