Stabilizer mixture

Patent metadata

Field	Value
Publication number	US-9475918-B2
Application number	US-201313874619-A
Country	US
Kind code	B2
Filing date	May 1, 2013
Priority date	Jan 13, 2006
Publication date	Oct 25, 2016
Grant date	Oct 25, 2016

Abstract

Suitable stabilizers for organic material are a mixture comprising A. at least one oligomeric compound, comprising repeat units of the formula (I), in which the meanings of the symbols are as follows: R1 is hydrogen, C1-C6-alkyl, formyl, C2-C6-alkanoyl, C1-C12-alkoxy, C5-C6-cycloalkoxy, cyanomethyl, 2-hydroxyethyl, benzyl or a radical of the formula -CR'=CH-CO-OR'', where R' is hydrogen, C1-C6-alkyl or a radical of the formula -CO-OR'', and R'' is C1-C18-alkyl, C5-C8-cycloalkyl, C7-C18-aralkyl, phenyl, or tolyl; R2 is a mixture composed of C14-C25-alkyl groups, where two of these alkyl groups whose number of carbon atoms is not permitted to differ by more than two respectively make up at least 30% of this mixture; R3 and R4, independently of one another, are C1-C6-alkyl; and B. at least one compound of the formula (II) or (III) where the meanings of the symbols and indices are as follows: n and m, independently of one another, are a natural number from 2 to 22, and R1, R3 and R4, independently of one another, have the meanings given in formula (I).

First claim

The invention claimed is:

1. A method for the stabilization of organic material with respect to exposure to light, oxygen, and heat, comprising:
mixing (A) and (B) together to form a mixture comprising (A) and (B) in ratio by weight of (A):(B) of 5:1 to 1:5;
storing the mixture;
and then adding the mixture to the organic material, where (A) and (B) are as follows:
(A) at least one oligomeric compound, comprising repeat units of the formula (I),

in which the meanings of the symbols are as follows:
R 1 is hydrogen, C 1 -C 6 -alkyl, formyl, C 2 -C 6 -alkanoyl, C 1 -C 12 -alkoxy, C 5 -C 6 -cycloalkoxy, cyanomethyl, 2-hydroxyethyl, benzyl or a radical of the formula—CR′═CH—CO—OR″, where
R′ is hydrogen, C 1 -C 6 -alkyl or a radical of the formula —CO—OR″, and
R″ is C 1 -C 18 -alkyl, C 5 -C 8 -cycloalkyl, C 7 -C 18 -aralkyl, phenyl, or tolyl;
R 2 is a mixture composed of C 14 -C 28 -alkyl groups, where two of these alkyl groups whose number of carbon atoms is not permitted to differ by more than two respectively make up at least 30% of this mixture;
R 3 and R 4 , independently of one another, are C 1 -C 6 -alkyl; and
(B) at least one compound of the formula (II) or (III)

where the meanings of the symbols and indices are as follows:
n and m, independently of one another, are a natural number from 2 to 22, and
R 1 , R 3 and R 4 , independently of one another, have the meanings given in formula (I).

2. The method according to claim 1 , wherein the organic material is a plastic or a paint.

3. The method according to claim 1 , where the meanings of the symbols and indices in the formulae (I) to (III) are as follows:
R 1 is H, C 1 -C 6 -alkyl, formyl, acyl, C 1 -C 6 -alkyl or benzyl;
R 2 is a mixture composed of C 16 -C 24 -alkyl groups;
R 3 and R 4 are methyl, and
m and n are a natural number from 6 to 8.

4. The method according to claim 1 , where component A is an oligomer of the formula (Ia)

and component B is at least one selected from the group of compounds (IIa), (IIIa), and (IIIb)

5. The method according to claim 1 , wherein the weight ratio of components A and B is in the range of from 2:1 to 1:2.

6. The method according to claim 1 , wherein the weight ratio of components A and B is in the range of from 1.2:1 to 1:1.2.

7. The method according to claim 1 , wherein the weight ratio of components A and B is about 1:1.

8. The method according to claim 1 , where component A is an oligomer of the formula (Ia)

and component B is at least one selected from the group of compounds (IIIa) and (IIIb)

Assignees

• Basf Se

Inventors

• Schambony Simon
• Glaser Alban
• Trauth Hubert
• Appel Manfred
• Haremza Sylke

Classifications

• C08K5/34

  Heterocyclic compounds having nitrogen in the ring · CPC title

• C09K15/20

  containing nitrogen and oxygen · CPC title

• C07D211/58

  attached in position 4 · CPC title

• C09D7/1241

  Chemistry & Metallurgy · mapped topic

• C08K5/3435 Primary

  Piperidines · CPC title