Compositions and processes for providing release coatings
AssigneeOMNOVA Solutions Inc.
InventorJoel E. Goldstein
Life of this patent
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Abstract
An aqueous composition that can be used to provide a release release properties to adhesive tape substrates can be applied at coating weights far less than those required in previously available compositions containing the same or similar release polymers. Inclusion of small amounts of a superwetter results in improved coatability and reduced amounts of sound generated during the process of releasing an adhesive tape from its roll.
Claims20
An aqueous composition useful for providing release properties to a substrate coated therewith, said composition having a total solids content of no more than 14 weight percent and comprising
- a) a release polymer component that is free of silicone release polymers and that comprises at least one release polymer which comprises at least 50 mole percent acrylate or vinyl acetate mer and which has a weight average molecular weight of 125±75 kg/mol, and
- b) from 0.5 to 1.5 weight percent, relative to said composition, of at least one sulfo-cuccinate.
A release coating that is free of silicone release polymers, said release coating comprising (a) at least one sulfocuccinate and (b) at least one release polymer which comprises at least 50 mole percent acrylate or vinyl acetate mer and which has a weight average molecular weight of 125±75 kg/mol, said release coating being provided from a composition having a total solids content of no more than 14 weight percent and comprising from 0.5 to 1.5 weight percent of said at least one sulfocuccinate.
A process for providing a release coating to an article, said method comprising applying to a substrate an aqueous composition that comprises at least one release polymer and from more than zero to 2 weight percent, relative to said composition, of at least one superwetter, said composition being free of silicone release polymers.
Dependencies are inferred from the claim text.