Substantially closed cell shaped hard phenol foam and method for preparing that phenol foam
US4920154A · kind A · utility
8Cited by
5References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 14, 1989 |
| Grant date | Apr 24, 1990 |
| Priority date | — |
| Expiry date | Apr 14, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2361/06
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A phenol foam and a method for preparing substantially closed cell shaped resins on the basis of the condensation product between, on the one hand an either or not substituted phenol and/or phenol derivative and, on the other hand an aldehyde by using a blowing means for forming a hard phenol foam, whereby a physical blowing means comprising chlorine-propane is used.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.