Method for the preparation of polymers
US6245882A · kind A · utility
1Cited by
6References
25Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 1, 1999 |
| Grant date | Jun 12, 2001 |
| Priority date | — |
| Expiry date | Sep 1, 2019 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G8/10
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Method for the manufacture of a phenolic resin emulsion and/or dispersion, wherein an aldehyde, a phenolic compound and an alkaline catalyst are allowed to react at a temperature of 40-100.degree. C. until a desired degree of condensation is achieved, and the pH of the resin is adjusted to a value below 9 using an acid in the presence of a surface active agent or a mixture thereof at a temperature below 100.degree. C. and a phenolic resin emulsion and/or dispersion is obtained providing a colorless or light-colored glue line or surface when cured.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.