Method for forming particles with cross-linked coatings for cosmetic applications
A technology of particles, core particles, applied in the field of topical compositions of coated particles, which can solve the problems of reduced overall performance, instability of cosmetic compositions or topical compositions, permeability, opacity, solubility, and agglomeration.
Inactive Publication Date: 2018-03-16
ELC MANAGEMENT LLC
View PDF30 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
The smaller the particle size, the greater the active surface area, and the more susceptible such particulate components are to adverse interactions or interference with other ingredients or components in cosmetic or topical compositions, which may render the cosmetic or topical composition Destabilization of topical compositions or reduction of their overall performance
[0005] Coatings for particles are well known, but they often suffer from one or more disadvantages such as permeability, opacity, solubility and agglomeration
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreExamples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0017] The compositions herein comprise particles coated with a thermally curable silicone composition.
[0018] The vinyl silicone coating herein comprises a vinyl-containing polydiorganosiloxane base polymer, which generally consists of siloxane units having substituents including lower alkyl groups such as methyl, ethyl, propyl, isopropyl, etc. and monovalent alkenyl groups of about 2 to 20 carbon atoms, such as vinyl, allyl, butenyl, etc., including cycloalkenyl. These polymers are prepared by methods known in the art and are commercially available in various functionalities. They generally have a viscosity at 25°C of from about 50 to about 100,000 centipoise.
[0019] The vinyl silicone coating also contains a SiH-containing polysiloxane used as a crosslinking agent. The curing reaction that occurs between the vinyl-functional polysiloxane base polymer and the SiH-containing crosslinker is an addition curing reaction known as hydrosilyla...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
| Property | Measurement | Unit |
|---|---|---|
| particle size | aaaaa | aaaaa |
| particle size | aaaaa | aaaaa |
| melting point | aaaaa | aaaaa |
Login to View More
Abstract
The present invention relates to a method for forming coated particles, comprising the steps of: agitating a volume of core particles while heating to a constant average temperature of about 40oC. Once particles are generally evenly mixed, with no apparent agglomeration, the vinyl-functional silicone polymer, hydride-functional crosslinker, and metal catalyst are combined in a premix under continuous propeller-mixing. The vinyl-functional silicone polymer, hydride-functional crosslinker, and metal catalyst premix is then siphoned into the main vessel, containing the heated core particles, at rate that ensures no clumping or agglomeration of the particulates. Once even coating has been achieved, the main vessel is heated to an average temperature of about 80oC, then cooled back down to roomtemperature (about 20oC-28oC). The coated material is then passed through a 45 [miu] sieve to remove any large particulates that may be present.
Description
field of invention [0001] The present invention relates to topical compositions comprising coated particles for preventing bleeding of colored particles and / or providing particle stability in solvent systems and methods for their preparation. Background of the invention [0002] Cosmetic or topical compositions typically comprise one or more particulate components such as pigments or dyes, fillers, thickeners, sunscreens, and the like. Such particulate components are generally insoluble in the corresponding solvent or carrier system and, if so, remain dispersed or suspended in the cosmetic or topical composition. [0003] The list of suitable particulate components is limited by factors such as stability, incompatibility with other cosmetic components, skin sensitization, reactivity, and the like. In the case of color cosmetics, many pigments and / or dyes that are soluble in oil or polar solvents such as water can be damaged by "bleeding" into the wider composition. [0004...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): A61K8/02A61K8/27A61K8/29A61K8/895A61Q19/00C09D143/04
CPCA61K8/0241A61K8/27A61K8/29A61K8/895A61Q19/00C09D143/04A61K2800/43A61K2800/412A61K2800/10A61K2800/624A61K2800/651A61K8/0283A61K8/89A61K2800/65
Inventor R.贝里昂T.格雷P.措利斯I.D.科亨
Owner ELC MANAGEMENT LLC