Compositions stabilized with hindered piperidine carboxylic acids

Claim 2

A composition of matter comprising a synthetic organic polymer normally subject to deterioration stabilized with ##SPC5## wherein R 1 and R 2 independently of each other are straight or branched-chain alkyl having from 1 to 6 carbon atoms, or together with the carbon to which they are bound form a cyclopentyl or cyclohexyl ring, which is unsubstituted or substituted with a methyl group. R 3 is hydrogen, alkyl having 1 to 12 carbon atoms, β-methoxyethyl, alkenyl having 3 to 4 carbon atoms, propargyl, benzyl or alkyl substituted benzyl, and R 4 is straight- or branched-chain alkylene having 1 to 4 carbon atoms, and wherein the reactants from which the synthetic organic polymer is derived are substantially free of chemical groups which would react by condensation with the carboxylic acid group of the stabilizer.

Claim 3

A composition of claim 1 wherein R 1 and R 2 are each methyl and R 4 is straight-chain alkylene having 1 to 4 carbon atoms.

Claim 4

A composition of matter comprising a synthetic organic polymer normally subject to deterioration stabilized with a. 0.005 to 5% of a stabilizer of claim 1. b. 0.005 to 5% of a phenolic antioxidant selected from 1,4-bis(3,5-di-t-butyl-4-hydroxybenzyl)-2,3,5,6-tetramethylbenzene, n-octadecyl-β-(3,5-di-t-butyl-4-hydroxyphenyl) propionate, pentaerythritol tetrakis{3-(3,5di-t-butyl-4-hydroxyphenyl propionate}, dioctadecyl 3,5-di-t-butyl-4-hydroxybenzylphosphonate, tris(3,5-di-t-butyl-4-hydroxybenzyl) isocyanurate, and di-n-octadecyl- α,α ', bis(3-t-butyl-5-methyl-4-hydroxybenzyl) malonate, and 2,4-bis(4-hydroxy-3,5-di-tert-butyl phenoxy)-6-(n-octylthioethylthio)-1,3,5-triazine, c. 0.01 to 2% of a thio co-stabilizer selected from di-lauryl-β-thiodipropionate and distearyl-β-thiodipropionate, and d. a stabilizing amount of a UV absorber selected from 2(2'-hydroxy-3', 5'-di-t-butylphenyl)-5-chlorobenzotriazole, 2-hydroxy-4-n-octoxylbenzophenone, {2,2' -thiobis (4-t-octylphenolate)}-n-butylamine nickel II, and 2(2'-hydroxy-5'-methylphenyl)-benzotriazole, wherein the reactants from which the synthetic organic polymer is derived are substantially free of chemical groups which would react by condensation with the carboxylic acid group of the stabilizer.

Claim 5

A composition of matter comprising a synthetic organic polymer normally subject to deterioration stabilized with a. 0.005 to 5% of a stabilizer of claim 1, b. 0.005 to 5% of a phenolic antioxidant of claim 3, and c. 0.01 to 2% of a thio co-stabilizer of claim 3, wherein the reactants from which the synthetic organic polymer is derived are substantially free of chemical groups which would react by condensation with the carboxylic acid group of the stabilizer.

Claim 6

A composition of claim 4 wherein (b) the phenolic antioxidant is selected from di-n-octadecyl 3,5-di-tert-butyl-4-hydroxybenzylphosphonate, di-n-octadecyl-α,α, '-bis(3-butyl-4-hydroxy-5-methylbenzyl)malonate and 2,4-bis (4-hydroxy-3,5-di-tert-butylphenoxy)-6-(n-octylthioethylthio)-1,3,5-triazine, and (c) the thio costabilizer is selected from dilauryl-β-thiodipropionate and distearyl-β-thiodipropionate.

Claim 7

A composition of claim 5 wherein the organic material is polyolefin.

Claim 8

A composition of claim 6 wherein the polyolefin is polypropylene.

Claim 9

A composition of claim 7 wherein R 1 and R 2 are each methyl, R 3 is hydrogen or methyl, and R 4 is straight-chain alkylene having 1 to 4 carbon atoms.

Claim 10

A composition of matter comprising a synthetic organic polymer normally subject to deterioration stabilized with (a) 0.005 to 5% of a stabilizer of claim 1, and (b) 0.005 to 5% of a phenolic antioxidant of claim 3, wherein the reactants from which the synthetic organic polymer is derived are substantially free of chemical groups which would react by condensation with the carboxylic acid group of the stabilizer.

Claim 11

A composition of matter comprising a synthetic organic polymer normally subject to deterioration stabilized with (a) 0.005 to 5% of a stabilizer of claim 1, (b) 0.005 to 5% of a phenolic antioxidant of claim 3, and (c) a stabilizing amount of a UV absorber of claim 3, wherein the reactants from which the synthetic organic polymer is derived are substantially free of chemical groups which would react by condensation with the carboxylic acid group of the stabilizer.

Claim 12

The composition of claim 10 consisting essentially of the organic material polypropylene, stabilized with the stabilizer of (a) and di-n-octadecyl(3,5-di-tert.-butyl-4-hydroxybenzyl)phosphonate and 2(2'-hydroxy-3' ,5'-di-tertbutylphenyl)-5-chlorobenzotriazole.

Claim 13

The composition of claim 11 wherein the stabilizer of (a) is o-mono (1,2,2,6,6-pentamethylpiperidin-4-ol)succinate.

Claim 14

The composition of claim 11 wherein the stabilizer of (a) is o-mono(2,2,6,6-tetramethylpiperidin-4-ol)succinate.

Claim 15

The composition of claim 11 wherein the stabilizer of (a) is o-mono (2,2,6,6-tetramethylpiperidin-4-ol)adipate.