Foundry moulding materials
US4020027A · kind A · utility
12Cited by
4References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 14, 1976 |
| Grant date | Apr 26, 1977 |
| Priority date | — |
| Expiry date | Jun 14, 1996 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB22C1/167
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A composition for making foundry moulds and cores of improved strength comprises a mixture of a granular refractory material, a sodium silicate binder and a polymeric resin material. The polymeric resin material is formed by heating together phenol, a carbohydrate and formaldehyde in the presence of a catalyst.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.