Foundry binder composition
US4459374A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 8, 1983 |
| Grant date | Jul 10, 1984 |
| Priority date | — |
| Expiry date | Apr 8, 2003 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K5/5406
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
This invention is concerned with foundry binder compositions for alkaline aggregates such as reclaimed sand, Olivia sand, alumina sand, etc., which cure at ambient temperatures. The binder composition is composed of phenolic resins, polyisocyanates and a hydrogen chloride emitting substance upon hydrolysis. Curing of this composition is by gaseous amines. The hydrogen chloride emitting substance on hydrolysis is selected from the following: ##STR1## wherein R.sub.1, R.sub.2, R.sub.3 can be selected from: Hydrogen, Chlorine, alkyl, vinyl or alkoxy, or PA1 (b) Thionyl chloride, sulfuryl chloride, acid chlorides of sulfur, such as methyl chlorosulfuric acid, ethyl chloroculfuric acid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.