Bitumen backed carpet tile
US5929145A · kind A · utility
24Cited by
13References
30Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 1, 1993 |
| Grant date | Jul 27, 1999 |
| Priority date | — |
| Expiry date | Jun 1, 2013 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/23993
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A bitumen composition suitable for a carpet tile backing is provided having from 12 to 35 wt. % bitumen, from 50 to 85 wt. % of an inorganic filler such as calcium carbonate and from 0.5 to 20 wt. % of an acid functionalized polyolefin selected from acrylic acid, maleic acid and maleic anhydride grafted isotactic polypropylene. The cold flow characteristics of the composition can be improved by incorporating from 1 to 10 wt. % atactic polypropylene.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.