Process for using sediments developed during storage of pure MDI
US4465638A · kind A · utility
3Cited by
3References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 20, 1983 |
| Grant date | Aug 14, 1984 |
| Priority date | — |
| Expiry date | Jan 20, 2003 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G18/7671
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
This invention relates to a process for utilizing the sediments in pure MDI which comprises PA1 (a) heating the sediments at temperatures of 180.degree. C. to 250.degree. C. for 0.25 hour to 6 hours in the presence of crude MDI; and PA1 (b) cooling the product to a temperature of 60.degree. C. or less within 5 minutes. The sediment-free crude MDI which results can then be used for the preparation of polyurethane products.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.