Concrete composition for the manufacture of moulds, mould and process for the manufacture of a mould
US5188791A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 1, 1991 |
| Grant date | Feb 23, 1993 |
| Priority date | — |
| Expiry date | Apr 1, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B2201/30
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Compound concrete composition for the manufacture of moulds, comprising: (1) a binder which comprises an alkaline-earth mineral substance, a constituent made up of fine particles of a compound other than an oxide, 90% of which have a particle size of between 1 and 150 .mu.m with a median diameter of between 3 and 20 .mu.m, these fine particles comprising particles of a substance which has a thermal conductivity higher than approximately 30 W/mK, chosen from silicon carbides, silicon carbonitrides, silicon nitrides, boron carbides, titanium carbides and tungsten carbides and a constituent made up of ultrafine particles at least 70% of which have a particle size smaller than 1 .mu.m with a median diameter of between 0.3 and 0.8 .mu.m, (2) water optionally with the addition of a dispersant, and (3) fillers comprising metal granulates and metal fibres, wherein the water/binder ratio is lower than 0.20 and the concrete composition has a thermal conductivity at 200.degree. C. which is equal to or higher than 5 W/m K.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.