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Preparation method and application of daily chemical organosilicone elastomer gel

An elastic gel and organosilicon technology, which is applied in the field of preparation of organosilicon elastomer gel for daily chemicals, can solve the problems of uneven particle size of elastomer powder, uneven product fineness, and difficult cleaning of reaction devices, etc. Achieve the effect of uniform product fineness, low production cost and low equipment requirements

Inactive Publication Date: 2017-12-08
GUANGZHOU TINCI MATERIALS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are some disadvantages in this process: the primary gel preparation process system is in a viscoelastic state, it is not easy to stir and disperse, and the reaction device is not easy to clean; after the primary gel is crushed by mechanical shearing, the particle size of the obtained elastomer powder is not uniform, and the product is delicate Uneven degree
[0009] Patent CN 106633076 A mentions spray curing technology to prepare silicone elastomer gel, but this process has obvious disadvantages: the equipment requirements are relatively complicated, and the spray curing chamber needs to be cleaned regularly, otherwise the elastomer powder will block the pipeline

Method used

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  • Preparation method and application of daily chemical organosilicone elastomer gel
  • Preparation method and application of daily chemical organosilicone elastomer gel
  • Preparation method and application of daily chemical organosilicone elastomer gel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] (1) Add 535.23g of n-propanol, 200.00g of hydrogen-containing silicone oil with a hydrogen content of 0.43%, and 29.24g of 1,4-pentadiene into a 1000ml three-necked flask, start stirring, and after mixing evenly, put the 0.38g of Karstedt catalyst was added dropwise to the three-necked flask, the amount of catalyst used was 500ppm, and the temperature was raised at the same time, and then reacted at 70°C for 3h under stirring condition, and the rotation speed was 80rpm.

[0036] (2) After the reaction, stop heating, cool the reactant to below 40°C, and filter to obtain solid powder.

[0037] (3) The obtained solid powder was dried at 120° C., vacuum degree: −0.95 MPa, and stirred for 3 hours to obtain a silicone elastomer powder.

[0038] (4) Add 535.23g of polydimethylsiloxane with a viscosity of 10mpa.s into the three-necked flask, and at 90°C and 80rpm, add the silicone elastomer powder obtained in step (3) into the three-necked flask, and stir for 2 hours to swell ...

Embodiment 2

[0040] (1) Add 888.16g of n-propanol, 200.00g of hydrogen-containing silicone oil with a hydrogen content of 0.2%, and 22.04g of 1,7-octadiene into a 1000ml three-necked flask, start stirring, and after mixing evenly, put the 0.67g of Pt catalyst was added dropwise to the three-necked flask, the amount of catalyst used was 600ppm, and the temperature was raised at the same time, and then reacted at 90°C for 8h under stirring conditions, and the rotation speed was 120rpm.

[0041] (2) After the reaction, stop heating, cool the reactant to below 40°C, and filter to obtain solid powder.

[0042] (3) Dry the obtained solid powder at 140° C., vacuum degree: −0.95 MPa, and stir for 2 hours to obtain silicone elastomer powder.

[0043] (4) Add 888.16g of polydimethylsiloxane with a viscosity of 5mpa.s into the three-necked flask, and at 80°C and 70rpm, add the silicone elastomer powder obtained in step (3) into the three-necked flask, and stir for 2 hours to swell , and finally a un...

Embodiment 3

[0045] (1) Add 840g of isopropanol, 200.00g of hydrogen-containing silicone oil with a hydrogen content of 0.06%, and 360.00g of vinyl-terminated polydimethylsiloxane with a vinyl mass fraction of 0.9% into a 1000ml three-necked flask, and open the Stir and mix evenly, add 0.16g of Pt catalyst dropwise to the three-necked flask under stirring conditions, the catalyst dosage is 120ppm, start to heat up at the same time, then react at 90°C for 8h under stirring conditions, and the rotation speed is 90rpm.

[0046] (2) After the reaction, stop heating, cool the reactant to below 40°C, and filter to obtain solid powder.

[0047] (3) Dry the obtained solid powder at 110° C., vacuum degree: −0.95 MPa, and stir for 2 hours to obtain silicone elastomer powder.

[0048] (4) Add 840g of decamethylcyclopentasiloxane into the three-necked flask, and at 70°C and 80rpm, add the silicone elastomer powder obtained in step (3) into the three-necked flask, stir for 3 hours to swell, and finally...

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Abstract

The invention belongs to the field of daily chemical organosilicone materials and discloses a preparation method and application of daily chemical organosilicone elastomer gel. The preparation method comprises the following steps: adding anorganic solvent, hydrogen-containing silicone oil, and a compound containing at least two aliphatic unsaturated groups in molecules into a reactor, and carrying out a precipitation polymerization reaction in the presence of a catalyst at the temperature of 50-90 DEG C for 2-9 hours; cooling and filtering after reaction completion, drying the obtained solid powder so as to obtain organosilicone elastomer powder; swelling the organosilicone elastomer powder with a diluents, thereby obtaining the daily chemical organosilicone elastomer gel, wherein the organic solvent refers to a volatile organic solvent which is soluble in reactive raw materials while insoluble in polymerization reaction products. According to the method disclosed by the invention, the organosilicone elastomer powder is prepared by the precipitation polymerization method by adopting a specific organic solvent, the requirement on equipment is low, and the obtained organosilicone elastomer gel is fresh and cool but not greasy in skin feeling and good in matte sense and can be directly added into daily cosmetics.

Description

technical field [0001] The invention belongs to the field of silicone materials for daily chemicals, and in particular relates to a preparation method and application of silicone elastomer gels for daily chemicals. Background technique [0002] Silicone elastomers refer to silicon-containing polymers with different network crosslinking structures. According to different states, it can be divided into: silicone elastomer powder, silicone elastomer emulsion, silicone elastomer gel. The mixture of dimethylsiloxane crosslinked polymer and diluent, called silicone elastomer gel, is a mixture of silicone crosslinked polymer with three-dimensional network structure and small molecule solvent. Silicone elastomer gel can give the skin a unique "velvety" skin feel, so it is widely used in the fields of daily cosmetics such as skin care, make-up, and deperspirants. [0003] The traditional silicone elastomer gel preparation process has the following two methods: [0004] method 1): ...

Claims

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Application Information

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IPC IPC(8): C08J3/075C08F283/12C08F236/20C08F299/08A61K8/895A61K8/04A61Q19/00A61K8/90A61K8/91C08L51/08C08L53/00
Inventor 柳晨醒霍梦月吴伟张宇张利萍
Owner GUANGZHOU TINCI MATERIALS TECH
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