Process for no-bake foundry application utilizing polyurethanes based on amine polyols
US4370463A · kind A · utility
3Cited by
7References
27Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 30, 1981 |
| Grant date | Jan 25, 1983 |
| Priority date | — |
| Expiry date | Mar 30, 2001 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G18/5033
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
No Bake foundry cores and molds for casting metals are prepared by using a binder comprising a polyol generally derived from alkoxylating an amine compound and a polyisocyanate. The binder is especially useful for casting non-ferrous metals, for example, the casting of aluminum, magnesium and other light weight metals. The cores and molds produced for casting aluminum and other light weight metals exhibit excellent shakeout while retaining other desirable core and mold properties. In addition the binders of this invention would have been observed to have an autocatalytic nature.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.