Silicone polyoxamide and silicone polyoxamide-hydrazide copolymers
US8124713B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 21, 2009 |
| Grant date | Feb 28, 2012 |
| Priority date | — |
| Expiry date | Mar 4, 2030 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G77/26
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A copolymer comprises at least two repeating units of formula IIn this formula each R1 is independently an alkyl, haloalkyl, aralkyl, alkenyl, aryl, or aryl substituted with an alkyl, alkoxy, or halo; each Y is independently an alkylene, aralkylene, or a combination thereof; each G is independently a bond or a divalent residue equal to a diamine of formula R3HN-G-NHR3 minus the two —NHR3 groups; each R3 is independently hydrogen or alkyl or R3 taken together with G and to the nitrogen to which they are both attached form a heterocyclic group; each n is independently an integer of 0 to 1500; each p is independently an integer of 1 to 10; and each q is independently an integer of 1 or greater, and wherein at least 50% of the q's are the integer 2.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.