Process for the preparation of aqueous emulsions of silicon oils and/or gums and/or resins
US5763505A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 10, 1997 |
| Grant date | Jun 9, 1998 |
| Priority date | — |
| Expiry date | Apr 10, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2383/04
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method for preparing oil-in-water emulsions of oils, gums or silicone resins by kneading a mixture of (1) a silicone phase (A) with a viscosity of at least 3 Pas or a consistency of at least 200, and (2) an aqueous phase comprising water, at least one surfactant (B) and optionally at least one water-soluble thickening polymer (C), wherein the relative amounts of water, (B) and optionally (C) are such that the aqueous phase preferably has at least as much viscosity or consistency as the silicone phase (A), said kneading being performed for a sufficient time and with sufficient shear to give an oil-in-water emulsion having a particle size of 0.1-5 .mu.m; and optionally by diluting the medium in water.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.