Surfactant treated clays useful as anti-tack agents for uncured rubber compounds
AssigneeJ. M. Huber Corporation
InventorsWalter O. Lackey, Carl J. Marshall, James E. Sikes, Gary M. Freeman
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Abstract
An anti-tack composition and method based on a kaolin clay/nonionic surfactant of intermediate HLB is disclosed where the surfactant is preferably an ethoxylated, acetylenic diol or octylphenal.
Claims13
An anti-tack composition consisting essentially of kaolin clay and a nonionic surfactant having a hydrophilic-lipophilic balance (HLB) of from 5.0 to 11.0, said nonionic surfactant selected from the group consisting of ethoxylated acetylenic diols and ethoxylated octylphenols and wherein said composition is 0.05% to 0.4% by weight of surfactant based on weight of dry clay.
A method of reducing the tack of uncured rubber compounds comprising:
- (a) treating kaolin clay with from 0.05 to 1.0% by weight (based on dry clay weight) of a nonionic surfactant having a hydrophile-lipophile balance form 5.0 to 11.0 selected from the group consisting of ethoxylated acetylenic diols and ethoxylated octylphenols, and
- (b) contacting the surface of said rubber compounds with an aqueous slurry of the composition of step (a) for at least 5 seconds to provide a coating pickup value of said composition of 2.0% or less by weight.
Dependencies are inferred from the claim text.