Lightweight asphalt based building materials and process for making same
US4634622A · kind A · utility
28Cited by
4References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 16, 1985 |
| Grant date | Jan 6, 1987 |
| Priority date | — |
| Expiry date | Sep 16, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T442/59
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A lightweight asphalt roofing product wherein the asphalt-based coating has a specific gravity less than 1.0. A lightweight filler is used which has an effective specific gravity in the range of 0.10-0.50 and is present in the coating in the range of 3%-25% by weight of the filled coating. In a preferred embodiment, the filler particles have hollow, gas filled inclusions, and comprise expanded perlite particles or expanded permicite particles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.