Poly (aminoorganofunctionalsiloxanes)
US6339137B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 22, 2000 |
| Grant date | Jan 15, 2002 |
| Priority date | — |
| Expiry date | Mar 22, 2020 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G77/34
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention provides near quantitative yields of greater than about 95% isomeric purity of poly(3-aminopropylmethylsiloxanes) of the general formulae:Me3Si(H2NCH2CH2CH2MeSiO)xOSiMe3(H2NCH2CH2CH2MeSiO)ywherein Me is methyl, x may range from 2 to about 100 and y may range from 3 to about 7. The present invention also provides a simple method for rapidly producing poly(3-aminopropylmethylsiloxanes) of the general formulae:Me3Si(H2NCH2CH2CH2MeSiO)xOSiMe3(H2NCH2CH2CH2MeSiO)ywherein Me is methyl, x may range from 2 to over 100 and y may range from 3 to about 7, the method comprising heating of 3-(3-aminopropyl)-1,1,1,3,5,5,5-heptamethyltrisiloxane, of at least 95% isomeric purity, with a basic catalyst, removing hexamethyldisiloxane, and decomposing the catalyst.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.