Hindered piperidyl light stabilizers
US4450248A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 14, 1981 |
| Grant date | May 22, 1984 |
| Priority date | — |
| Expiry date | Aug 14, 2001 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K5/3435
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Piperidine-4-carboxylic acid derivatives of the formula ##STR1## wherein: R.sub.2 is hydrogen, alkyl having from one to four carbon atoms, or oxyl; PA1 R.sub.3 is --XR.sub.5 or --CN; PA1 R.sub.4 is alkylene having from two to twelve carbon atoms; cycloalkylene having from three to twelve carbon atoms; arylene having from six to twelve carbon atoms; or aralkylene having from seven to twelve carbon atoms; PA1 R.sub.5 is hydrogen, alkyl having from one to twenty carbon atoms, cycloalkyl having from five to six carbon atoms; or alkenyl having from three to twenty carbon atoms; or ##STR2## X is --O-- or --NH--; and n is 0 to 10; and the acid addition salts thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.