Non-halogenated rubber compounds for use in conveyor belts
US8007917B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 25, 2007 |
| Grant date | Aug 30, 2011 |
| Priority date | — |
| Expiry date | Mar 16, 2028 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/3183
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A non-halogenated rubber compound is provided for use in conveyor belts, particularly those used in underground mining. The non-halogenated rubber compound is fire-resistant in accordance with MSHA standards and produces acceptable levels of toxicity and smoke upon burning. Such non-halogenated rubber compound includes a blend of rubbery polymers in combination with aluminum trihydrate, which is a fire retardant, and optionally a phosphate plasticizer, which can provide the rubber compound with a more desirable workability. The blend of rubbery polymers is composed of natural rubber and butadiene rubber, and optionally styrene-butadiene rubber, such blend being present in a total amount of 100 phr. In one embodiment, the aluminum trihydrate is present in an amount of about 30 phr to about 150 phr. In another embodiment, the phosphate plasticizer is present in an amount of about 10 phr to about 60 phr.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.