Metal complexes of .alpha.-aminophosphonic acid half-esters and of .alpha.- a
US4199494A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 21, 1977 |
| Grant date | Apr 22, 1980 |
| Priority date | — |
| Expiry date | Dec 21, 1997 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07F9/6533
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Metal salts of monoalkyl .alpha.-aminophosphonates or of .alpha.-aminophospinates show a considerable thermostability. Obviously the amino groups are coordinated on the metal atom. These complex salts are soluble in organic solvents and compatible even with non-polar plastics such as polyolefins. They are effective stabilizers against the light-induced deterioration of polymers with an outstanding duration of this activity. The cation of these salts may be a complex-forming multivalent metal, preferable nickel, cobalt, zinc and aluminum. The amino group may be primary, secondary or tertiary. The complex salts are prepared according conventional processes, for example by conversion of the corresponding alkali phosphonate with a metal halide in organic solution. This is a continuation of application Ser. No. 682,871 filed on May 3, 1976, now abandoned which is a continuation-in-part of application Ser. No. 503,426, filed on Sept. 5, 1974, now abandoned.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.