Method for producing carboxyl-group-containing nitrile rubber
US11161920B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 23, 2018 |
| Grant date | Nov 2, 2021 |
| Priority date | — |
| Expiry date | Dec 21, 2038 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L2312/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A method of producing a carboxyl group-containing nitrile rubber including a coagulation step of coagulating a carboxyl group-containing nitrile rubber component by mixing a monovalent metal salt and a polymer flocculating agent into a carboxyl group-containing nitrile rubber latex having an iodine value of 120 or less, wherein the monovalent metal salt is compounded in an amount of 3 to 25 parts by weight and the polymer flocculating agent is compounded in an amount of 0.01 to 10 parts by weight relative to 100 parts by weight of a rubber solid content in the latex, and a weight ratio of the monovalent metal salt/the polymer flocculating agent is in the range of 10 to 500
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.