Anti-sticking composition for coating unvulcanized rubber
AssigneeKalcor Coatings Company, Inc.
InventorWilliam M. Ellslager
Life of this patent
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Abstract
A dry composition is described which can be converted to an anti-sticking composition for unvulcanized rubber by dispersion in water, consisting essentially of a film forming clay (bentonite or attapulgite), a surfactant and an additive capable of inactivating calcium and magnesium ions (e.g. polyphosphate); optionally, there may be present a defoamer, and up to equal parts by volume, based on a film forming clay, of a filler to speed drying.
Claims5
A dry composition readily dispersible in water to form a coating which can be applied to pellets or slabs of unvulcanized rubber stock to form a non-dusting to low dusting film which is effective in preventing adhesion of the slabs to one another, consisting essentially of a film forming clay of the class consisting of alkali metal bentonites and attapulgite, from 1 to 5% by weight, based on the film forming clay, of an anionic or nonionic surfactant together with a material capable of inactivating calcium and magnesium ions, in quantity by weight from one to five times that of the surfactant, and from 0 to equal parts by volume, based on the film forming clay, of an inert filler.
Dependencies are inferred from the claim text.