Reinforced cement sheet product containing fibers other than asbestos, clay and thickener
US4363666A · kind A · utility
32Cited by
8References
28Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 11, 1981 |
| Grant date | Dec 14, 1982 |
| Priority date | — |
| Expiry date | Feb 11, 2001 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02W30/91
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A fiber cement product consisting essentially by weight of a Portland cement binder in the amount of between about 40% and 80%, natural and/or synthetic fibers in an amount of between 1% and 15%, clay in an amount of between about 2% and 15%, and thickener in an amount of between about 0.03% and 0.5%. The product may also contain silica and/or filler in an amount of between about 10% and 40% by weight. The silica is generally used in a product which is to be autoclaved. The filler may be waste fiber-cement product or inert filler material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.