Surface treatment for inhibiting thermal oxidation of polypropylene fabrics
US4892784A · kind A · utility
2Cited by
8References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 27, 1988 |
| Grant date | Jan 9, 1990 |
| Priority date | — |
| Expiry date | Jul 27, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T442/2918
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A process is disclosed for inhibiting thermal oxidative degradation of polypropylene webs results from rinsing the polypropylene webs after washing in an aqueous solution of either dilaurylthiodipropionate (DLTOP) or distearylthiodipropionate (DSTDP). The aqueous solution has a concentration of DLTDP or DSTDP of 5 ppm. The aqueous solution is maintained about 150.degree. F., and the polypropylene web is rinsed or dipped in the aqueous solution until saturated. A polypropylene web is also disclosed which has been treated to inhibit thermal oxidative degradation by the above process.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.