Cold-setting mixture for the production of casting moulds and cores
US4146526A · kind A · utility
Inventors
Key dates
| Filing date | Mar 9, 1977 |
| Grant date | Mar 27, 1979 |
| Priority date | — |
| Expiry date | Mar 9, 1997 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G18/542
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A cold-setting mixture for the production of casting moulds and cores comprises the following components, in parts by weight: PA1 Refractory filler -- 100 PA1 Binder, viz., novolac phenol-formaldehyde resin -- 0.5 to 5.0 PA1 Hardener, viz., polyisocyanate -- 0.005 to 1.0 PA1 Organic solvent -- 0.5 to 5.0 PA1 Hardening catalyst -- 0.0025 to 5.0 The catalyst employed in this mixture is a composition which comprises silicates and aluminates of alkaline-earth metals, cements, slags of ferrochrome manufacturing process, nepheline slurry and basic salts, e.g. sodium carbonate. The catalyst due to easy proportioning thereof, makes it possible to reduce the cost of the mixture, reduce the amount of polyisocyanate required, and simplify the preparation of this mixture. The proposed cold-setting mixture has enhanced strength properties and improves the quality of casting mould and cores being made therefrom.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.