Phenol formaldehyde foams
US4417004A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 5, 1979 |
| Grant date | Nov 22, 1983 |
| Priority date | — |
| Expiry date | Dec 5, 1999 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2361/34
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A two-part pack, and method for its preparation, from which a phenol-formaldehyde resin foam may be prepared, which system comprises in the first part of the pack a phenol-formaldehyde resin, a blowing agent which is an inert, low boiling liquid, an effective amount of a nitrogenous modifier capable of permitting dispersion of the blowing agent in the resin, and a surfactant; and in the second part of the pack an acid catalyst system dispersed in a liquid polyhydroxy compound, in a weight ratio of polyhydroxy compound to acid catalyst of at least 1:1. These two-part packs enable simpler handling and placement techniques being shelf storable, compared to the known shelf storable systems which involve three, or more, components.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.