Shell molding process and composition
US4089837A · kind A · utility
13Cited by
5References
12Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Mar 7, 1977 |
| Grant date | May 16, 1978 |
| Priority date | — |
| Expiry date | Mar 7, 1997 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K5/13
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Shell cores and molds are prepared more rapidly by the shell process using resin coated sands wherein the resin is a phenol-formaldehyde novalak resin but having a small amount, e.g. about 1 to about 10 percent by weight, of resorcinol incorporated therein whereby a significant reduction in the cycle time required to produce the cores or molds is achieved.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.