Lightweight insulating boards and process for manufacturing same
US4840672A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 12, 1987 |
| Grant date | Jun 20, 1989 |
| Priority date | — |
| Expiry date | Mar 12, 2007 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02W30/91
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Lightweight insulating boards in accordance with the present invention comprise Portland cement, fibers and fillers including: PA0 (a) 50-75% by weight of cement, PA0 (b) 0-5% by weight of cellulose fibers, PA0 (c) 0.5-4% by weight of alkali-resistant fiber material, PA0 (d) 5-20% by weight of mica, PA0 (e) 5-20% by weight of light filler and PA0 (f) 8-25% by weight of hydrated lime. They are shaped into boards from a suspension and are set at least 15 days, and preferably 28 days. The insulating boards of the present invention meet all of the requirements set for such materials regarding flexural strength, incombustibility, and the like.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.