Process for the preparation of cellular products and laminates based on furan prepolymers
US4640934A · kind A · utility
Inventor
Key dates
| Filing date | Sep 24, 1984 |
| Grant date | Feb 3, 1987 |
| Priority date | — |
| Expiry date | Sep 24, 2004 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2361/00
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Process for the preparation of cellular products and laminates based on anhydrous furan prepolymers which possess free OH groups, which is carried out at normal temperature using small amounts of silicon tetrachloride and/or phosphorus oxychloride as the crosslinking and expansion agent, characterised in that a combination of a furfuryl alcohol resin and/or a furfural/phenol (phenol and/or bisphenol A) resin with a bishydroxymethylfuran resin is used as the furan prepolymers, without the use of an acid, the silicon tetrachloride and/or phosphorus oxychloride being used in amounts of 0.1 to 5% by weight, based on the resin employed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.