Process for preventing gel formation in lattices of hydrogenated, low molecular weight, functionalized elastomers
AssigneeZeon Chemicals L.P.
InventorsDavid D. H. Tao, Michael Gozdiff, Edmee Files
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AssigneeZeon Chemicals L.P.
InventorsDavid D. H. Tao, Michael Gozdiff, Edmee Files
Estimating the term…
The present invention discloses a process for hydrogenating a latex of a low molecular weight functionalized, unsaturated elastomer to produce a latex of a hydrogenated, low molecular weight, low gel, functionalized elastomer, said process comprising hydrogenating the low molecular weight, functionalized, unsaturated elastomer in the presence of (1) an oxidant selected from the group consisting of oxygen and hydroperoxides, (2) a reducing agent selected from the group consisting of hydrazine and hydrazine hydrates, and (3) a metal ion activator, wherein a hydroxylamine is added to the latex of the low molecular weight, functionalized, unsaturated elastomer or to the latex of the hydrogenated, low molecular weight, functionalized elastomer prior, during, or subsequent to the hydrogenation to produce the latex of the hydrogenated low molecular weight, low gel, functionalized elastomer.
A process for inhibiting gel formation in a latex of a hydrogenated, low molecular weight, functionalized elastomer which comprises adding an amine selected from the group consisting of dialkyl-hydroxylamines, diaryl-hydroxylamines, and alkyl,aryl-hydroxylamines to the latex of the hydrogenated, low molecular weight, functionalized elastomer, wherein the amine is of the structural formula:
A process for hydrogenating a latex of a low molecular weight functionalized, unsaturated elastomer to produce a latex of a hydrogenated, low molecular weight, low gel, functionalized elastomer, said process comprising hydrogenating the low molecular weight, functionalized, unsaturated elastomer in the presence of (1) an oxidant selected from the group consisting of oxygen and hydroperoxides, (2) a reducing agent selected from the group consisting of hydrazine and hydrazine hydrates, and (3) a metal ion activator, wherein an amine selected from the group consisting of dialkyl-hydroxylamines, diaryl-hydroxylamines, and alkyl,aryl-hydroxylamines is added to the latex of the low molecular weight, functionalized, unsaturated elastomer or to the latex of the hydrogenated, low molecular weight, functionalized elastomer prior, during, or subsequent to the hydrogenation to produce the latex of the hydrogenated low molecular weight, low gel, functionalized elastomer, wherein the amine is of the structural formula:
Dependencies are inferred from the claim text.