Process for the synthesis of multi-modal aqueous dispersions of polysiloxanes
US5856402A · kind A · utility
6Cited by
6References
10Claims
0Family size
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Key dates
| Filing date | Dec 30, 1996 |
| Grant date | Jan 5, 1999 |
| Priority date | — |
| Expiry date | Dec 30, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S977/788
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A process for the acid-catalyzed synthesis of polysiloxane emulsions is discussed. The process comprises preheating an aqueous reaction mixture, optionally comprising polysiloxane emulsion seeds, and optionally containing a surfactant, to a temperature of up to about 110.degree. C. and adding to the aqueous reaction mixture, water, an acid catalyst surfactant, and a polysiloxane precursor to form a polysiloxane emulsion comprising essentially multi-modal, optionally multi-layered particles having desired multi-modal particle sizes in a range of from about 100 nm to about 2 microns.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.