Peroxide composition

Claim 2

A peroxide composition comprising: (a) from about 10 to about 65 weight percent organic peroxide dispersed in an aqueous medium containing sufficient surfactant to provide a stable dispersion, and (b) from 0.05 to 1 mole percent, basis the organic peroxide, of diphenyl peroxydicarbonate stabilizer represented by the graphic formula: ##STR9## wherein R 1 is a C 1 -C 4 alkyl and m is 0, 1, 2, or 3, said amount of diphenyl peroxydicarbonate being sufficient to reduce the rate of self induced homolytic decomposition of the organic peroxide at temperatures of from 0° C. to +5° C.

Claim 3

The peroxide composition of claim 1 wherein the diphenyl peroxydicarbonate stabilizer is diphenyl peroxydicarbonate.

Claim 4

The peroxide composition of claim 1 wherein the diphenyl peroxydicarbonate stabilizer is selected from the group consisting of di(2,6-dimethylphenyl) peroxydicarbonate, di(2,4-dimethylphenyl) peroxydicarbonate, di(2,4,6-trimethylphenyl) peroxydicarbonate, di(2-tertiarybutyl-4-methylphenyl) peroxydicarbonate, and di(2,6-diisopropyl-4-methylphenyl) peroxydicarbonate.

Claim 5

The peroxide composition of claim 1 wherein the organic peroxide is a peroxydicarbonate ester having the graphic formula: ##STR10## wherein R 1 ' and R 1 " are each C 2 -C 12 alkyl radicals.

Claim 6

The peroxide composition of claim 4 wherein the peroxydicarbonate ester is di-n-propyl peroxydicarbonate, di-isopropyl peroxydicarbonate, di-n-butyl peroxydicarbonate, di-secondary butyl peroxydicarbonate and di-2-ethylhexyl peroxydicarbonate.

Claim 7

The peroxide composition of claim 4 wherein the diphenyl peroxydicarbonate stabilizer is diphenyl peroxydicarbonate.

Claim 8

The peroxide composition of claim 1 wherein the organic peroxide is an organic peroxymonocarbonate ester, a diacyl peroxide, or an organic peroxyester.

Claim 9

The peroxide composition of claim 3 wherein the organic peroxide is a peroxydicarbonate ester having the graphic formula: ##STR11## wherein R 1 ' and R 1 " are each C 2 -C 12 alkyl radicals.

Claim 10

The peroxide composition of claim 8 wherein the peroxydicarbonate ester is di-n-propyl peroxydicarbonate, di-isopropyl peroxydicarbonate, di-n-butyl peroxydicarbonate, di-secondary butyl peroxydicarbonate and di-2-ethylhexyl peroxydicarbonate.

Claim 11

The peroxide composition of claim 5 wherein the diphenyl peroxydicarbonate stabilizer is diphenyl peroxydicarbonate.

Claim 12

The peroxide composition of claim 10 wherein the diphenyl peroxydicarbonate is present in amounts of between 0.05 and 0.50 mole percent, basis the organic peroxide.

Claim 13

The peroxide composition of claim 10 wherein the organic peroxide is present in amounts of between 20 and 60 weight percent.

Claim 14

In the method of polymerizing ethylenically unsaturated monomers wherein an organic peroxide is used as an initiator for the polymerization, the improvement which comprises using as the organic peroxide a peroxide composition of (a) from about 10 to about 65 weight percent organic peroxide dispersed in an aqueous medium containing sufficient surfactant to provide a stable dispersion, and (b) from 0.05 to 1 mole percent, basis the organic peroxide, of diphenyl peroxydicarbonate stabilizer represented by the graphic formula: ##STR12## wherein R 1 is a C 1 -C 4 alkyl and m is 0, 1, 2, or 3, said amount of diphenyl peroxydicarbonate being sufficient to reduce the rate of self induced homolytic decomposition of the organic peroxide at temperatures of from 0° C. to +5° C.

Claim 15

In the method of polymerizing ethylenically unsaturated monomers wherein an organic peroxide is used as an initiator for the polymerization, the improvement which comprises using as the organic peroxide a peroxide composition of (a) from about 10 to about 65 weight percent organic peroxide dispersed in an aqueous medium containing sufficient surfactant to provide a stable dispersion, and (b) from 0.05 to 1 mole percent, basis the organic peroxide, of diphenyl peroxydicarbonate stabilizer represented by the graphic formula: ##STR12## wherein R 1 is a C 1 -C 4 alkyl and m is 0, 1, 2, or 3, said amount of diphenyl peroxydicarbonate being sufficient to reduce the rate of self induced homolytic decomposition of the organic peroxide at temperatures of from 0° C. to +5° C.

Claim 16

The method of claim 13 wherein the organic peroxide is a peroxydicarbonate ester having the graphic formula: ##STR13## wherein R 1 ' and R 1 " are each C 2 -C 12 alkyl radicals, and wherein the diphenyl peroxydicarbonate stabilizer is diphenyl peroxydicarbonate.

Claim 17

The method of claim 13 wherein the organic peroxide is a peroxydicarbonate ester having the graphic formula: ##STR14## wherein R 1 ' and R 1 " are each C 2 -C 12 alkyl radicals, and wherein the diphenyl peroxydicarbonate stabilizer is selected from the group consisting of di(2,6-dimethylphenyl)peroxydicarbonate, di(2,4-dimethylphenyl)peroxydicarbonate, di(2,4,6-trimethylphenyl)peroxydicarbonate, di(2-tertiarybutyl-4-methylphenyl)peroxydicarbonate, and di(2,6-diisopropyl-4-methylphenyl)peroxydicarbonate.

Claim 18

The method of claim 14 wherein the peroxydicarbonate ester is di-n-propyl peroxydicarbonate, di-isopropyl peroxydicarbonate, di-n-butyl peroxydicarbonate, di-secondary butyl peroxydicarbonate and di-2-ethylhexyl peroxydicarbonate and the amount of diphenyl peroxydicarbonate stabilizer is from 0.05 to 1 mole percent, basis the peroxydicarbonate ester.

Claim 19

The method of claim 15 wherein the peroxydicarbonate ester is di-n-propyl peroxydicarbonate, di-isopropyl peroxydicarbonate, di-n-butyl peroxydicarbonate, di-secondary butyl peroxydicarbonate and di-2-ethylhexyl peroxydicarbonate and the amount of diphenyl peroxydicarbonate stabilizer is from 0.05 to 1 mole percent, basis the peroxydicarbonate ester.

Claim 20

The method of claim 16 wherein the ethylenically unsaturated monomer is vinyl chloride.

Claim 21

The method of claim 17 wherein the ethylenically unsaturated monomer is vinyl chloride.

Claim 22

The method of claim 13 wherein the organic peroxide is an organic peroxymonocarbonate ester, a diacyl peroxide, or an organic peroxyester.

Claim 23

The method of claim 20 wherein the diphenyl peroxydicarbonate stabilizer is diphenyl peroxydicarbonate.

Claim 24

The method of claim 13 wherein the organic peroxide is a peroxydicarbonate ester having the graphic formula: ##STR15## wherein R 1 ' and R 1 " are each C 2 -C 12 alkyl radicals.