Method of making silicone emulsions having low residual volatile siloxane oligomer content
US6627698B2 · kind B2 · utility
3Cited by
11References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 13, 2001 |
| Grant date | Sep 30, 2003 |
| Priority date | — |
| Expiry date | Jul 14, 2021 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G77/06
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A batch steam distillation process removes volatile siloxane oligomers from an emulsion containing siloxane polymers and volatile siloxane oligomers prepared by emulsion polymerization of volatile siloxane oligomers. In one embodiment, emulsions stripped of volatile siloxane oligomers are re-catalyzed to initiate condensation polymerization. In another embodiment, clear emulsions stripped of volatile siloxane oligomers are provided even though an antifoam is used in the stripping process.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.