Polysiloxane-polyurea block copolymers
US4935482A · kind A · utility
6Cited by
1References
5Claims
0Family size
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Key dates
| Filing date | Jan 3, 1989 |
| Grant date | Jun 19, 1990 |
| Priority date | — |
| Expiry date | Jan 3, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G77/54
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Polysiloxane-polyurea block copolymers are prepared from isocyanate and aminophenoxy functional polyorganosiloxane. These block copolymers are hydrolytically stable and exhibit improved thermal stability compared to aminoalkyl functional polyorganosiloxanes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.