Polyolefin light stabilizers
US3984348A · kind A · utility
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6Claims
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Assignee
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Key dates
| Filing date | Apr 7, 1975 |
| Grant date | Oct 5, 1976 |
| Priority date | — |
| Expiry date | Apr 7, 1995 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K5/5399
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
O,O-Bis(aryl)amidothiophosphates, useful as light stabilizers in polyolefins, are those having the formula: ##EQU1## wherein: R is hydrogen, alkyl of 1-12 carbons, or halogen; Ar is phenyl or naphthyl; n is 1 or 2; and R' and R", which may be the same or different, are each selected from the group consisting of hydrogen, alkyl of 1-18 carbons, 2,2,6,6-tetramethyl-4-piperidyl, cycloalkyl of 5-6 carbons or both R' and R", together with the N to which they are attached, form a morpholino or piperidino ring. Such compounds are made by reacting PSCl.sub.3 with two moles of a phenol and then the product thereof with an amine.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.