Inhibiting premature vulcanization of rubbers

Claim 2

The composition according to claim 2 wherein the rubber contains an organic vulcanization accelerating agent selected from the group consisting of thiazoles, diaryl guanidines and thiuram sulfides.

Claim 3

The composition according to claim 2 wherein R1 and R2 are radicals selected from the group consisting of alkyl radicals having from one to 20 carbon atoms, cycloalkyl radicals having from five to 20 carbon atoms, aralkyl radicals having from seven to 20 carbon atoms, chloroalkyl radicals having from one to 20 carbon atoms, aryl radicals having from six to 20 carbon atoms, alkylaryl radicals having from seven to 20 carbon atoms, chloroaryl radicals having from six to 20 carbon atoms, nitroaryl radicals having from six to 20 carbon atoms, alkoxyaryl radicals having from seven to 20 carbon atoms and alkenyl radicals having from three to 20 carbon atoms, wherein R is selected from the group consisting of R1, R2 and , wherein R4 and R5 are selected from the group consisting of R1 and R2 or R4 and R5 are joined to form a ring selected from the group consisting of morpholino, piperidino and pyrrolidino rings, and wherein R3 is selected from the group consisting of alkylene radicals having from one to six carbon atoms, cycloalkylene radicals having from five to seven carbon atoms and arylene radicals having from six to 20 carbon atoms.

Claim 4

The composition according to claim 2 wherein R is selected from the group consisting of alkyl radicals having from one to six carbon atoms, phenyl, p-tolyl, p-chlorophenyl, dimethylamino, morpholino, and piperidino and radicals; wherein R1 is selected from the group consisting of alkyl radicals having from one to six carbon atoms, cyclohexyl, phenyl, p-tolyl, p-chlorophenyl and allyl radicals and wherein R2 is selected from the group consisting of alkyl radicals having from one to six carbon atoms, benzyl, cyclohexyl, 2-chlorocyclohexyl, phenyl, p-tolyl, p-chlorophenyl, 1-(2-chlorobutyl)-, 2-(1-chlorobutyl)-, and allyl radicals, wherein R3 is selected from the group consisting of methylene, ethylene, propylene, 1,2-cyclohexylene and p-phenylene radicals and wherein when R and R1 are joined to form, along with the - SO2 - N - group, a heterocyclic ring, R and R1 are joined to form a radical selected from the group consisting of trimethylene and tetramethylene.

Claim 5

The composition according to claim 2 wherein R2 is a monochloroalkyl radical having one to 12 carbon atoms.

Claim 6

The composition according to claim 5 wherein when R is an alkyl radical it is selected from the group consisting of methyl, ethyl, isopropyl, n-butyl and t-butyl radicals, when R1 is an alkyl radical it is selected from the group consisting of methyl, ethyl, isopropyl, n-butyl and t-butyl radicals and when R2 is an alkyl radical, it is selected from the group consisting of methyl, ethyl, isopropyl, n-butyl and t-butyl radicals.

Claim 7

The composition according to claim 2 wherein R is selected from the group consisting of phenyl and p-tolyl radicals, R1 is selected from the group consisting of of methyl, ethyl, isopropyl and phenyl radicals and R2 is an alkyl radical having from one to six carbon atoms.

Claim 8

The composition according to claim 2 wherein the retarder is selected from the group consisting of N-(n-butylthio)-N,N'',N''-trimethylsulfamide; N-(cyclohexylthio)-N,N'',N''-trimethylsulfamide; N-(2-chloro-1-butylthio)-N-methyl-methanesulfonamide; N-(n-butylthio)-N-methyl-methanesulfonamide; N-(methylthio)-N-methyl-p-toluenesulfonamide; and -N-(phenylthio)-N-methyl-p-toluenesulfonamide N-(n-butylthio)-N-methyl-p-toluenesulfonamide.

Claim 9

The composition according to claim 2 wherein the sulfur vulcanizing agent includes elemental sulfur.

Claim 10

The composition according to claim 2 wherein the organic vulcanizing accelerating agent is a sulfenamide accelerator.

Claim 11

The composition according to claim 2 wherein the organic vulcanizing accelerating agent is a benzothiazolesulfenamide accelerator.

Claim 12

The composition according to claim 2 wherein the organic vulcanizing accelerating agent is a benzothiazy 1 amino disulfide.

Claim 14

An accelerator-retarder composition comprising an organic vulcanization accelerating agent selected from the group consisting of thiazole accelerators, aryl guanidine accelerators, organic disulfide accelerators and thiocarbamylsulfenamide accelerators and at least one retarder selected from the group consisting of compounds having the following structural formulas:

Claim 15

The composition according to claim 2 wherein the retarder is N-(phenylthio)-N-methyl-p-toluenesulfonamide.