Foundary binder systems which contain alcohol modified polyisocyanates
US5874487A · kind A · utility
3Cited by
18References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 7, 1996 |
| Grant date | Feb 23, 1999 |
| Priority date | — |
| Expiry date | Nov 7, 2016 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G18/8064
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The invention relates to foundry binder systems which use modified polyisocyanates. The modified polyisocyanates are prepared by reacting a polyisocyanate with an aliphatic alcohol having one active hydrogen atom. These modified polyisocyanates, along with a phenolic resole resin, are added to a foundry aggregate to form a foundry mix which is shaped and cured with a gaseous amine curing catalyst.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.