Anionic and cationic silicone emulsions
US6465568B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 11, 2000 |
| Grant date | Oct 15, 2002 |
| Priority date | — |
| Expiry date | Dec 27, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S516/924
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Emulsions and microemulsions containing particles of siloxane polymers are prepared by an emulsion polymerization process involving (i) the formation of a mixture by combining a siloxane oligomer, an ionic surfactant, no nonionic surfactant, and water; (ii) agitating the mixture without using high shearing forces (homogenization) to form droplets of oligomer prior to polymerization that have an average diameter of greater than 10 micron/10,000 nanometer; (iii) adding a siloxane polymerization catalyst to the oligomer mixture; (iv) agitating the mixture without using high shearing forces; (v) polymerizing the oligomer to form new particles of polymer; and (vi) continuing step (v) until the polymer has increased in viscosity or molecular weight.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.