Process for preparation of formaldehyde copolymers
US4504636A · kind A · utility
1Cited by
6References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 8, 1983 |
| Grant date | Mar 12, 1985 |
| Priority date | — |
| Expiry date | Dec 8, 2003 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G2/24
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A copolymer of formaldehyde with a cyclic formal is continuously prepared by feeding formaldehyde, the cyclic formal and 0.1-20 weight parts, per 100 weight parts of formaldehyde, of an inert organic solvent to a biaxial mixer where the formaldehyde is copolymerized with the cyclic formal in the presence of boron trifluoride or an ether complex thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.