Method of producing a quick-curing novolac phenolic resin using ammonium halides
US4870154A · kind A · utility
5Cited by
3References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 20, 1987 |
| Grant date | Sep 26, 1989 |
| Priority date | — |
| Expiry date | Nov 20, 2007 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G8/10
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A method of producing a novolac phenolic resin having quick-curing properties and good fluidity is disclosed, whereby the novolac resin is prepared by reacting a phenol with an aldehyde using an acidic catalyst and thereafter adding an ammonium halide. The ammonium halide is added in amounts of about 0.05 to 3 wt % of the solid resin, and the conversion of aldehyde is not less than 90% and the water content of the resin is not less than 5%.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.