Process for the hydrogenation of a polymer composed of diene monomer units and nitrile group containing monomer units and hydrogenated polymer
US6552132B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 9, 2001 |
| Grant date | Apr 22, 2003 |
| Priority date | — |
| Expiry date | Feb 9, 2021 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F8/04
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The invention relates to a process for the hydrogenation of a polymer composed of diene monomer units and nitrile group containing monomer units in which crosslinks formed as a result of the hydrogenation are broken by adding, before, during or after the hydrogenation, a compound that satisfies the formula R1—N(H)—X (I) or (R1)(R2)C═N—Y (II), whereR1 is a hydrogen atom, an alkyl or cycloalkyl group with 1-30 carbon atoms, or an aromatic group with 6-30 carbon atoms andR2 is an alkyl or cycloalkyl group with 1-30 carbon atoms, or an aromatic group with 6-30 carbon atoms, X is chosen from the group comprising —R3, —OR4, —SR4, —NR5R6, where R3, R4 and R5 are a hydrogen atom, an alkyl or cycloalkyl group with 1-30 carbon atoms or an aromatic group with 6-30 carbon atoms and R6 is an alkyl or cycloalkyl group with 1-30 carbon atoms or an aromatic group with 6-30 carbon atomsY is chosen from the group comprising —R7, —OR8, —SR8, —NR9R10 and —N═CR11R12, where R7, R8, R9, R10, R11 and R12 are a hydrogen atom, an alkyl or cycloalkyl group with 1-30 carbon atoms or an aromatic group with 6-30 carbon atoms, and …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.