Piperidine-spiro-hydantoin derivatives and their use as stabilizers
US3975462A · kind A · utility
14Cited by
9References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 22, 1974 |
| Grant date | Aug 17, 1976 |
| Priority date | — |
| Expiry date | Oct 22, 1994 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K15/322
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Piperidine-spiro-hydantoin derivatives having the formula ##SPC1## Wherein X represents oxygen atom or sulfur atom; n is an integer of 1 to 4 inclusive, and R represents various aliphatic or aromatic groups depending on the value of n. These compounds (I) are useful as stabilizers against photo and thermal deterioration of various synthetic polymers and can be prepared, for example, by reacting the corresponding 3-unsubstituted piperidine-spiro-hydantoin compound with the halide R-(X.sub.1).sub.n in which R and n are as defined herein and X.sub.1 is a halogen atom.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.