Oligomeric hindered amine light stabilizers based on multi-functional carbonyl compounds and methods of making same
US6696570B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 25, 2001 |
| Grant date | Feb 24, 2004 |
| Priority date | — |
| Expiry date | Feb 15, 2022 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K5/3435
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Oligomeric compounds and methods of making the compound having the formula:T—&Parenopenst;E—F&Parenclosest;i—&Parenopenst;E—F′&Parenclosest;j—&Parenopenst;E′—F&Parenclosest;k—&Parenopenst;E′—F′&Parenclosest;l—S  (II)wherein i, j, k, and l are integers from about 0 to 300 and the sum of i, j, k, and l is greater than 2, wherein the units F, F′ and T are derived from one or more multi-functional carbonyl compounds of general structureDO—CO—CRaRb—(—CRcRd—)n—NH—(Y)m—CO—OD  (IV)wherein n is an integer from 1 to 15, m is either 0 or 1; Ra, Rb, Rc, and Rd, are each a hydrogen or a hydrocarbyl group; Y is CO—(CReRf)p, wherein Re and Rf are each a hydrogen or hydrocarbyl group and p is zero or an integer from 1 to 20 or CO—C6H4—, wherein the substitution pattern on the phenylene group is an ortho, meta, or para substitution pattern, and one or more of the hydrogens of the phenylene group may be substituted by a hydrocarbyl group or a functional group; and D is a hydrocarbyl group and the units E, E′ and S ar…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.