Organopolysiloxane microemulsion, process for its production and application thereof
US4935464A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 28, 1988 |
| Grant date | Jun 19, 1990 |
| Priority date | — |
| Expiry date | Apr 28, 2008 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G77/06
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A microemulsion with an average particle size not exceeding 0.15 micrometers or organopolysiloxane composed of trifunctional siloxane units with the formula RSiO.sub.3/2 and difunctional siloxane units with the formula R.sup.1.sub.2 SiO is characterized by transparency, by excellent mechanical, dilution, and blending stabilities and by an excellent stability against pH variations. The microemulsion is prepared by process comprising the slow addition, to an aqueous emulsion-polymerization catalyst solution, of a crude emulsion prepared from an organotrialkoxysilane having the formula RSi(OR.sup.1).sub.3, a cyclic organopolysiloxane having the formula (R.sup.1.sub.2 SiO).sub.n, a surfactant, and water. A microemulsion which consists of 30 to 95 mol % trifunctional siloxane units and 70 to 5 mol % difunctional siloxane units is useful as a fiber-treatment agent that can impart slip resistance to fibrous material without stiffening the hand, while at the same time not causing oil spots.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.