Method for the production of MDI dimer
US10047054B2 · kind B2 · utility
10Cited by
19References
21Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 12, 2013 |
| Grant date | Aug 14, 2018 |
| Priority date | — |
| Expiry date | Apr 1, 2034 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G18/82
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The invention relates to a method for the production of 4,4′-methylenebis(phenylisocyanate) dimer (MDI dimer) which is distinguished by an MDI dimer being obtained which is present in high purity. The MDI dimer which is produced according to the method according to the invention is distinguished by being essentially free of MDI and also urea derivatives. Furthermore, the invention relates to a corresponding MDI dimer and also the use thereof as crosslinker for polyurethanes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.