Method of making a fire retardant polymer resin
US4275170A · kind A · utility
9Cited by
16References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 7, 1979 |
| Grant date | Jun 23, 1981 |
| Priority date | — |
| Expiry date | Sep 7, 1999 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S521/907
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Flame retardant polymer resins formed by an acid condensation reaction from a mixture of resorcinol and furfural with a molar excess of the aldehyde. In one particular embodiment the resin is formed of a mixture of two prepolymer solutions with at least a boric acid catalyst, one or both of the prepolymer solutions being an acid-condensation reaction product of resorcinol and furfural with excess aldehyde functionality, or one of the prepolymers being a mix of substantially unreacted resorcinol and furfural with a slight molar excess of aldehyde.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.