Oligomeric phenylphosphonites
US4472548A · kind A · utility
2Cited by
6References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 30, 1983 |
| Grant date | Sep 18, 1984 |
| Priority date | — |
| Expiry date | Jun 30, 2003 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K5/5333
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Oligomeric alkylenebisphenyl phenylphosphonites, easily prepared by the reaction of phenyldichlorophosphine and certain bis-phenols in the presence of a base, provide enhanced stabilizing activity to hydroxyalkyleneyl isocyanurates when combined to stabilize organic materials subject to degradation. These oligomeric phenylphosphonites are not expensive, resist hydrolysis, do not evaporate from or are leached out of polymers when mixed therewith and provide excellent protection to polymers during processing and result in decreased water carry over of polymer films on leaving a cooling water bath during the film forming process.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.