Claims
- 1. A compound of formula I ##STR7## wherein R.sup.1 and R.sup.2 independently from one another represent alkyl having 1-4 C-atoms or together with the C-atom to which they are attached form a cyclopentane or cyclohexane or a 2,2,6,6-tetramethylpiperidine ring,
- R.sup.3 is hydrogen, methyl, phenyl or vinyl,
- R.sup.4 and R.sup.5 independently from one another represent hydrogen, methyl, phenyl, vinyl, alkoxy having 1-8 C-atoms, alkoxyalkoxy having 3-10 C-atom, cyclohexyloxy, aralkoxy having 7 or 8 C-atoms, phenoxy which is unsubstituted or substituted by chlorine, alkyl or alkoxy having each 1-4 C-atoms, or a group of the formula Ia ##STR8## and, if R.sup.3 and R.sup.4 are hydrogen, methyl, phenyl or vinyl, R.sup.5 may also be a group of the formula Ib ##STR9## wherein n is an integer of from 1 to 20, and X is hydrogen, alkyl having 1-12 C-atoms, alkenyl having 3-6 C-atoms, alkoxyalkyl having 3-14 C-atoms, aralkyl having 7 or 8 C-atoms or an aliphatic acyl group having 1-4 C-atoms or one of the groups --CH.sub.2 COOR.sup.6, --CH.sub.2 --CH(R.sup.7)--OR.sup.8 or --COOR.sup.9 wherein
- R.sup.6 is alkyl having 1-8 C-atoms, alkenyl having 3-6 C-atoms, phenyl, aralkyl having 7 or 8 C-atoms or cyclohexyl,
- R.sup.7 is hydrogen, methyl or phenyl,
- R.sup.8 is hydrogen or an aliphatic, aromatic, araliphatic or alicyclic acyl group having up to 18 C-atoms, which may be substituted in its aryl moiety with chlorine, alkyl having 1-4 C-atoms, alkoxy having 1-8 atoms and/or hydroxy, and
- R.sup.9 is alkyl having 1-8 C-atoms, benzyl, phenyl or cyclohexyl, with the proviso that, when X is hydrogen and
- R.sup.3 is phenyl, one of R.sup.4 and R.sup.5 is different from a 2,2,6,6-tetramethylpiperidine-4-oxy residue.
- 2. A compound as claimed in claim 1 wherein
- R.sup.1 and R.sup.2 are each methyl,
- R.sup.3 is hydrogen, methyl, phenyl or vinyl,
- R.sup.4 and R.sup.5 are independently of another hydrogen, methyl, phenyl, vinyl, alkoxy having 1-8 C-atoms, phenoxy which is unsubstituted or substituted by an alkyl group having 1-4 C-atoms, or a residue of formula Ia, and, if R.sup.3 and R.sup.4 are hydrogen, methyl, phenyl or vinyl.
- R.sup.5 may also be a residue of formula Ib, and
- X is hydrogen, alkyl having 1 to 4 C-atoms, benzyl or an aliphatic acyl group having 1-4 C-atoms.
- 3. A compound as claimed in claim 1 wherein R.sup.1 and R.sup.2 are each methyl, X is hydrogen, alkyl having 1-4 C-atoms or acetyl, R.sup.3 is hydrogen, methyl or phenyl and R.sup.4 and R.sup.5 are methyl, phenyl or a residue of formula Ia in which residue of formula Ia R.sup.1 and R.sup.2 are each methyl and X is hydrogen, alkyl having 1-4 C-atoms or acetyl.
- 4. A compound as claimed in claim 1 wherein R.sup.1 and R.sup.2 are each methyl, X is hydrogen or methyl, R.sup.3 and R.sup.4 are methyl or phenyl and R.sup.5 is methyl, phenyl or a residue of formula Ia in which residue of formula Ia R.sup.1 and R.sup.2 are each methyl and X is hydrogen or methyl.
- 5. A compound as claimed in claim 1 wherein R.sup.1 and R.sup.2 are each methyl, X is hydrogen or methyl, R.sup.3 is methyl and R.sup.4 and R.sup.5 are methyl, phenyl or a residue of formula Ia in which residue of formula Ia R.sup.1 and R.sup.2 are each methyl and X is hydrogen or methyl.
- 6. The compound of claim 1, 2,2,6,6-tetramethyl-4-triphenylsilyloxypiperidine.
- 7. The compound of claim 1, 1,2,2,6,6-pentamethyl-4-triphenylsilyloxypiperidine.
- 8. The compound of claim 1, diphenyl-bis(2,2,6,6-tetramethylpiperidine-4-oxy)silane.
- 9. The compound of claim 1, diphenyl-bis(1,2,2,6,6-pentamethylpiperidine-4-oxy)silane.
- 10. The compound of claim 1, dimethyl-bis(2,2,6,6-tetramethylpiperidine-4-oxy)silane.
- 11. A composition of matter stabilized against photodeterioration comprising an organic polymer, normally subject to deterioration by light, and from 0.01 to 5.0 percent by weight of a compound as claimed in claim 1.
- 12. A composition as claimed in claim 11, wherein the organic polymer is a polyolefin or a styrene homo- or copolymer.
- 13. A composition as claimed in claim 11, wherein the organic polymer is a polyurethane or a polyamide.
Priority Claims (1)
Number |
Date |
Country |
Kind |
6831/75 |
May 1975 |
CHX |
|
Parent Case Info
This application is a continuation-in-part application of co-pending application Ser. No. 687,825, filed May 19, 1976, now abandoned.
US Referenced Citations (2)
Number |
Name |
Date |
Kind |
3513170 |
Murayama et al. |
May 1970 |
|
3840494 |
Murayama et al. |
Oct 1974 |
|
Foreign Referenced Citations (2)
Number |
Date |
Country |
1326889 |
Aug 1973 |
GBX |
406833 |
Jun 1974 |
SUX |
Non-Patent Literature Citations (1)
Entry |
Shapiro et al., Polymer Science USSR, vol. A14, (1973), pp. 3034-3043. |
Continuation in Parts (1)
|
Number |
Date |
Country |
Parent |
687825 |
May 1976 |
|