Use of recycled plastics for preparing high performance composite railroad ties
US6191228A · kind A · utility
39Cited by
6References
24Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 27, 1999 |
| Grant date | Feb 20, 2001 |
| Priority date | — |
| Expiry date | Jan 27, 2019 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L67/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A method of maintaining proper distance between railroad rails is disclosed. The method utilizes railroad ties manufactured from a composite of polystyrene and polyolefin components, preferably obtained from recycled plastics. The composite exhibits a dual phase morphology wherein the two phases, polystyrene and polyolefin, intertwine and remain continuous throughout the material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.