Foundry sand compositions containing graft copolymers of biochemically-synthesized heteropolysaccharides
US3947392A · kind A · utility
6Cited by
2References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 1, 1971 |
| Grant date | Mar 30, 1976 |
| Priority date | — |
| Expiry date | Oct 1, 1991 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K8/24
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A sand core and mold composition for use in casting metals comprising foundry sand, clay, water and from about 0.0025% to about 1% by weight of a water-soluble graft copolymer of acrylic acid and a minor amount of a water-soluble polyhydroxy polymeric compound, including water-soluble salts thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.