Sponge rubber rug underlay having improved load bearing capacity
US4060502A · kind A · utility
7Cited by
2References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 14, 1974 |
| Grant date | Nov 29, 1977 |
| Priority date | — |
| Expiry date | Feb 14, 1994 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2427/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A composition is provided for use in flexible sponge rubber rug underlay of a type including about 100 parts of natural or synthetic rubber, from about 100 to about 300 parts of a reinforcing filler, and from about 50 to about 200 parts of oil. The improvement in the composition comprises from about 10 to about 40 parts of the natural or synthetic rubber being replaced by an approximately equal number of parts of a finely divided vinyl chloride polymer or copolymer. The present invention may also provide a sponge rubber of lower cost for the same apparent density.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.