Process for cleaning metal surfaces of poly(arylene sulfide) deposits
US4435221A · kind A · utility
2Cited by
1References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 30, 1982 |
| Grant date | Mar 6, 1984 |
| Priority date | — |
| Expiry date | Jul 30, 2002 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C48/05
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A process for the removal of poly(arylene sulfide) deposits is provided which comprises contacting said deposits with a solution comprising an alkali metal hydrosulfide in a lactam. In addition, a process for the cleaning of metal parts having poly(arylene sulfide) deposits is provided by contacting the metal parts in the manner as described immediately above, contacting the metal part with a lower alkyl alcohol, washing said metal part with water, drying said metal part, contacting the dried part with concentrated HNO.sub.3 followed by water washing and drying.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.