Complex acrylates as stabilizer for conjugated diene/monovinyl aromatic copolymers

Claim 3

A method in accordance with claim 1 wherein the conjugated diene is butadiene and the monovinyl substituted aromatic hydrocarbon is styrene and wherein the weight ratio of said butadiene to said styrene in said copolymer is about 24:76.

Claim 4

A method in accordance with claim 1 wherein said complex acrylate is incorporated in an amount in the range of about 0.05 to about 1.5 phr.

Claim 5

A method in accordance with claim 1 wherein said complex acrylate is 2-(2-hydroxy-3-t-butyl-5-methylbenzyl)-4-methyl-6-t-butyl phenyl acrylate.

Claim 8

A method in accordance with claim 5 wherein said alkyl thiopropionate is present in an amount in the range of about 0.05 to about 1.5 phr.

Claim 9

A method in accordance with claim 6 wherein said alkylthiopropionate is pentaerythritol tetrakis(3-laurylthiopropionate).

Claim 10

A method in accordance with claim 1 wherein said organic phosphite is present in an amount in the range of about 0.05 to about 2.0 phr.

Claim 11

A method in accordance with claim 1 wherein said non-acrylate substituted hindered phenolic compound is present in an amount in the range of about 0.05 to about 0.5 phr.

Claim 12

A method in accordance with claim 8 wherein said organic phosphite is tris(nonylphenyl) phosphite.

Claim 13

A method in accordance with claim 9 wherein said non-acrylate substituted hindered phenolic compound is n-octadecyl 3-(3,5-di-t-butyl-4-hydroxyphenyl)propionate.

Claim 16

A composition of matter consisting essentially of an intimate mixture of a conjugated diene/monovinyl substituted aromatic hydrocarbon copolymer wherein said copolymer is selected from the group consisting of linear or branched block, tapered block or random block copolymers, wherein the weight ratio of conjugated diene to monovinyl substituted aromatic hydrocarbon in said copolymer is in the range of about 5:95 to about 50:50; a complex acrylate of the formula ##STR5## and R 1 , R 2 and R 3 are the same or different and are selected from the group consisting of hydrogen, alkyl residues having from 1 to 16 carbon atoms, aryl residues, cycloalkyl residues having from 5 to 9 carbon atoms, and alkyl substituted aryl residues having from 7 to 12 carbon atoms, and wherein said acrylate is present in an amount in the range of about 0.05 to about 1.5 phr; an organic phosphite, wherein said organic phosphite is present in an amount in the range of about 0.05 to about 2.0 phr; and a non-acrylate substitute hindered phenolic compound, wherein said non-acrylate substituted hindered phenolic compound is present in an amount in the range of about 0.05 to about 0.5 phr.

Claim 17

A composition of matter consisting essentially of an intimate mixture of a conjugated diene/monovinyl substituted aromatic hydrocarbon copolymer wherein said copolymer is selected from the group consisting of linear or branched block, tapered block or random block copolymers, wherein the weight ratio of conjugated diene to monovinyl substituted aromatic hydrocarbon in said copolymer is in the range of about 5:95 to about 50:50; a complex acrylate of the formula ##STR5## and R 1 , R 2 and R 3 are the same or different and are selected from the group consisting of hydrogen, alkyl residues having from 1 to 16 carbon atoms, aryl residues, cycloalkyl residues having from 5 to 9 carbon atoms, and alkyl substituted aryl residues having from 7 to 12 carbon atoms, and wherein said acrylate is present in an amount in the range of about 0.05 to about 1.5 phr; an organic phosphite, wherein said organic phosphite is present in an amount in the range of about 0.05 to about 2.0 phr; and a non-acrylate substitute hindered phenolic compound, wherein said non-acrylate substituted hindered phenolic compound is present in an amount in the range of about 0.05 to about 0.5 phr.

Claim 18

A composition in accordance with claim 13 wherein said conjugated diene is butadiene and said monovinyl substituted aromatic hydrocarbon is styrene and wherein the weight ratio of said butadiene to said styrene in said copolymer is in the range of about 5:95 to about 50:50.

Claim 19

A composition in accordance with claim 13 wherein said complex acrylate is 2-(2-hydroxy-3-t-butyl-5-methylbenzyl)4-methyl-6-t-butylphenyl acrylate.

Claim 20

A composition in accordance with claim 13 wherein said phosphite is tris(nonylphenyl)phosphite.

Claim 21

A composition in accordance with claim 13 wherein said non-acrylate substituted hindered phenolic compound is selected from the group consisting of n-octadecyl 3-(3,5-di-t-butyl-4-hydroxyphenyl)propionate and tetrakis[3-(3,5-di-t-butyl-4-hydroxyphenyl) propionyloxymethyl]methane.

Claim 22

A composition of matter consisting essentially of an intimate mixture of a conjugated diene/monovinyl substituted aromatic hydrocarbon copolymer wherein said copolymer is selected from the group consisting of linear or branched block, tapered block or random block copolymers, wherein the weight ratio of conjugated diene to monovinyl substituted aromatic hydrocarbon in said copolymer is in the range of bout 5:95 to about 50:50; a complex acrylate of the formula ##STR6## and R 1 , R 2 and R 3 are the same or different and are selected from the group consisting of hydrogen, alkyl residues having from 1 to 16 carbon atoms, aryl residues, cycloalkyl residues having from 5 to 9 carbon atoms, and alkyl substituted aryl residues having from 7 to 12 carbon atoms, and wherein said acrylate is present in an amount in the range of about 0.05 to about 1.5 phr; and an alkyl thiopropionate of the formula ##STR7## wherein R 4 is an alkyl group having 4-20 carbon atoms.

Claim 23

A composition of matter consisting essentially of an intimate mixture of a conjugated diene/monovinyl substituted aromatic hydrocarbon copolymer wherein said copolymer is selected from the group consisting of linear or branched block, tapered block or random block copolymers, wherein the weight ratio of conjugated diene to monovinyl substituted aromatic hydrocarbon in said copolymer is in the range of bout 5:95 to about 50:50; a complex acrylate of the formula ##STR6## and R 1 , R 2 and R 3 are the same or different and are selected from the group consisting of hydrogen, alkyl residues having from 1 to 16 carbon atoms, aryl residues, cycloalkyl residues having from 5 to 9 carbon atoms, and alkyl substituted aryl residues having from 7 to 12 carbon atoms, and wherein said acrylate is present in an amount in the range of about 0.05 to about 1.5 phr; and an alkyl thiopropionate of the formula ##STR7## wherein R 4 is an alkyl group having 4-20 carbon atoms.

Claim 24

A composition in accordance with claim 18 wherein said alkyl thiopropionate is present in an amount in the range of about 0.05 to about 1.5 phr.

Claim 25

A composition in accordance with claim 19 wherein said alkyl thiopropionate is pentaerythritol tetrakis(3-laurylthiopropionate).

Claim 26

A composition comprising an intimate mixture of a butadiene/styrene copolymer wherein said copolymer is selected from the group consisting of linear or branched block, tapered block or random block copolymers, wherein the weight ratio of butadiene to styrene is about 24:76, and 2-(2-hydroxy-3-t-butyl-5-methylbenzyl)-4-methyl-6-t-butylphenyl acrylate in an amount in the range of about 0.05 to about 1.5 phr, and pentaerythritol tetrakis(3-laurylthiopropionate) in an amount in the range of about 0.05 to about 1.5 phr.

Claim 27

A composition comprising an intimate mixture of a butadiene/styrene copolymer wherein said copolymer is selected from the group consisting of linear or branched block, tapered block or random block copolymers, wherein the weight ratio of butadiene to styrene is about 24:76, and 2-(2-hydroxy-3-t-butyl-5-methylbenzyl)-4-methyl-6-t-butylphenyl acrylate in an amount in the range of about 0.05 to about 1.5 phr, and pentaerythritol tetrakis(3-laurylthiopropionate) in an amount in the range of about 0.05 to about 1.5 phr.

Claim 28

A composition comprising an intimate mixture of a butadiene/styrene copolymer wherein said copolymer is selected from the group consisting of linear or branched block, tapered block or random block copolymers, wherein the weight ratio of butadiene to styrene is about 24:76, and 2-(2-hydroxy-3-t-butyl-5-methylbenzyl)-4-methyl-6-t-butylphenyl acrylate in an amount in the range of about 0.05 to about 1.5 phr, and n-octadecyl 3-(3,5-di-t-butyl-4-hydroxyphenyl)propionate in an amount in the range of about 0.05 to about 0.5 phr, and tris(nonylphenyl) phosphite in an amount in the range of about 0.05 to about 2.0 phr.

Claim 29

A composition comprising an intimate mixture of a butadiene/styrene copolymer wherein said copolymer is selected from the group consisting of linear or branched block, tapered block or random block copolymers, wherein the weight ratio of butadiene to styrene is about 24:76, and 2-(2-hydroxy-3-t-butyl-5-methylbenzyl)-4-methyl-6-t-butylphenyl acrylate in an amount in the range of about 0.05 to about 1.5 phr, and n-octadecyl 3-(3,5-di-t-butyl-4-hydroxyphenyl)propionate in an amount in the range of about 0.05 to about 0.5 phr, and tris(nonylphenyl) phosphite in an amount in the range of about 0.05 to about 2.0 phr.