Compositions comprising mixtures of silicone fluids and peptizing agents having use as rubber processing aids
AssigneeTechnical Processing, Inc.
InventorsEnrique Aguirre, Paul R. Yankner
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Abstract
The invention provides a processing aid and method for lubricating and improving the processability and releasability of rubber and plastic without adversely affecting and, in certain instances, improving the physical properties of the rubber or plastic such as adhesion, tack, modulus and tensile strength. The processing aid comprises a pre-formed homogeneous mixture of at least one silicone fluid lubricant and at least one peptizing agent. A preferred processing aid also includes a silicone fluid wetting agent, which affords decreased vulcanization times and increased production rates.
Claims26
A processing aid for lubricating and improving the processability of a rubber compound without adversely affecting the adhesion, tack, modulus and tensile strength of the rubber comprising a silicone fluid lubricating agent, having poor compatibility in rubber, which has been mixed with a peptizing agent selected from the group consisting of an alkylbenzene sulfonic acid represented by the formula:
- ##STR10## wherein each X is hydrogen or a branched or straight chain alkyl group having from 4 to 14 carbon atoms, thiazole accelerators, phenyl hydrazine and its derivatives, alkyl and aryl mercaptans and dithio-bisbenzanilides, said mixing being prior to adding the processing aid to the rubber and the proportions of said silicone lubricating agent and said peptizing agent being sufficient to render the lubricating agent more compatible with the rubber to which the processing aid is to be added.
A processing aid for lubricating and improving the processability of a rubber compound without adversely affecting the adhesion, tack, modulus and tensile strength of the rubber comprising a silicone fluid lubricating agent, having poor compatibility in rubber, which has been mixed with a peptizing agent selected from the group consisting of mercaptobenzothiazole, cyclohexybenzothiazole sulphenamide, phenyl hydrazine, thio-B-naphthol, xylyl mercaptan, pentachlorothiophenol, zinc pentachlorothiophenate, dithio-bisbenzanilide, N-tallow alkyltrimethylenediamine oleate and an alkylbenzene sulfonic acid represented by the formula:
- ##STR13## wherein each X is hydrogen or a branched or straight chain alkyl group having from 4 to 14 carbon atoms, said mixing being prior to adding the processing aid to the rubber and the proportions of said silicone lubricating agent and said peptizing agent being in the ratio of from 0.2:1 to 15:1 by weight and sufficient to render the lubricating agent more compatible with the rubber to which the processing aid is to be added.
A processing aid for lubricating and improving the processability of a rubber compound without adversely affecting the adhesion, tack, modulus and tensile strength of the rubber comprising a silicone fluid lubricating agent, having poor compatibility in rubber, which has been mixed with a peptizing agent selected from the group consisting of alkyl mercaptans, aryl mercaptans and an alkylbenzene sulfonic acid represented by the formula:
- ##STR14## wherein each X is hydrogen or a branched or straight chain alkyl group having from 4 to 14 carbon atoms, said mixing being prior to adding the processing aid to the rubber and the proportions of said silicone lubricating agent and said peptizing agent being in the ratio of from 0.2:1 to 15:1 by weight and sufficient to render the lubricating agent more compatible with the rubber to which the processing aid is to be added .
Dependencies are inferred from the claim text.