Silicon-containing copolymer and process for producing the same
US6946536B2 · kind B2 · utility
7Cited by
4References
12Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 14, 2002 |
| Grant date | Sep 20, 2005 |
| Priority date | — |
| Expiry date | Aug 13, 2022 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09D183/14
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A silicon-containing copolymer which comprises units represented by the general formulae (I) and (II) as essential units and ones represented by the general formulae (III) to (VII) as optional units and has a number average molecular weight of 500 to 1,000,000,—(—R1R2Si—A —)p— (I)—(—R3R4Si—R7—SiR5R6—)q— (II)—(—R8Si—A—)r— (III)—(—R9(H)Si—A—)s— (IV)—(—R1R2Si—NH—R10—NH—)t— (V)—(—R8Si—NH—R10—NH—)u— (VI)—(—R9(H)Si—NH—R10—NH—)w— (VII)wherein A is NH or oxygen, the proportions of these satisfying the relationship 0.01≦Si—O/(Si—N+Si—O)≦0.99.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.