Water-repellent fine particles and making method
a technology of fine particles and water repellent, applied in the field of water repellent fine particles, can solve the problems of changing the color of the cosmetic film on the skin or losing the evenness
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Benefits of technology
Problems solved by technology
Method used
Image
Examples
example 1
[0058]A 1-L glass beaker was charged with 500 g of methylvinylpolysiloxane of formula (1), shown below, having a viscosity of 580 mm2 / s and 19 g (an amount to provide 1.06 hydrosilyl groups per olefinic unsaturated group) of methylhydrogenpolysiloxane of formula (2), shown below, having a viscosity of 30 mm2 / s. Using a homo mixer, the contents were agitated at 2000 rpm for dissolution. Then 3 g of polyoxyethylene lauryl ether (moles of ethylene oxide added=9 moles) and 55 g of water were added. The contents were agitated at 6000 rpm using Homo Mixer until an oil-in-water type emulsion with a noticeable viscosity buildup was formed, after which agitation was continued for a further 15 minutes. While agitating at 2000 rpm, 421 g of water was added to the emulsion, which turned into a homogeneous white emulsion. The emulsion was transferred to a 1-L glass flask equipped with an anchor paddle agitator, where it was conditioned at 15-20° C. With agitation, a mixture of 0.8 g of a toluene...
example 2
[0064]A water dispersion of silicone elastomer spherical fine particles was prepared as in Example 1.
[0065]The water dispersion of silicone elastomer particles, 870 g, was transferred to a 3-L glass flask equipped with an anchor paddle agitator, to which 2013 g of water and 57 g of 28% aqueous ammonia were added. At this point, the liquid was at pH 11.3. The liquid was conditioned at 5-10° C., and 46.8 g (an amount to provide 5.1 parts by weight of polymethylsilsesquioxane per 100 parts by weight of silicone elastomer particles after hydrolytic condensation reaction) of methyltrimethoxysilane was added dropwise over 20 minutes. Next, a mixture of 8.4 g (corresponding to 1.9 parts by weight relative to 100 parts by weight of silicone elastomer particles) of trimethylsilanol and 4.8 g (corresponding to 0.34 mole per mole of trimethylsilanol) of tetramethoxysilane was added dropwise over 5 minutes. Agitation was continued for a further 1 hour while maintaining the liquid temperature at...
example 3
[0069]A water dispersion of silicone elastomer spherical fine particles was prepared as in Example 1.
[0070]The water dispersion of silicone elastomer particles, 870 g, was transferred to a 3-L glass flask equipped with an anchor paddle agitator, to which 2012 g of water and 57 g of 28% aqueous ammonia were added. At this point, the liquid was at pH 11.3. The liquid was conditioned at 5-10° C., and 46.8 g (an amount to provide 5.1 parts by weight of polymethylsilsesquioxane per 100 parts by weight of silicone elastomer particles after hydrolytic condensation reaction) of methyltrimethoxysilane was added dropwise over 20 minutes. Next, a mixture of 9.9 g (corresponding to 2.2 parts by weight relative to 100 parts by weight of silicone elastomer particles) of trimethylmethoxysilane and 4.8 g (corresponding to 0.33 mole per mole of trimethylmethoxysilane) of tetramethoxysilane was added dropwise over 5 minutes. Agitation was continued for a further 1 hour while maintaining the liquid te...
PUM
| Property | Measurement | Unit |
|---|---|---|
| Percent by mass | aaaaa | aaaaa |
| Percent by mass | aaaaa | aaaaa |
| Particle size | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More