Process for preparing polyoxymethylenes
US4380620A · kind A · utility
5Cited by
5References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 12, 1981 |
| Grant date | Apr 19, 1983 |
| Priority date | — |
| Expiry date | Aug 12, 2001 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G2/18
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
In a process for preparing polyoxymethylenes by polymerizing formaldehyde in the presence of an anionic polymerization catalyst, the use of a polyhydric alcohol having at least three alcoholic hydroxyl groups in the molecule permits the preparation of polyoxymethylenes which have desired molecular weights along with improved melt fluidity and which are excellent in processability.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.