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US 12,286,570 B2Granted
Compositions and processes for providing release coatings
AssigneeSynthomer Inc.
InventorJoel E. Goldstein
Life of this patent
Estimating the term…
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.
Claims6
An aqueous composition for release coatings, the aqueous composition having a total solids content of no more than 10 weight percent and comprising:
- a) a release polymer component that is free of silicone release polymers and that comprises a release polymer from a monomer of formula (I-a) and which has a weight average molecular weight of 125+75 kg/mol,
- where R1 is H, X is O, R2 is lower alkyl, E is O and R3 is a long chain alkyl group, where the release polymer includes pendent groups of formula (I)
- where X is O or S, E is O or S or NH, R2 is a lower alkyl, Z is a divalent (thio) carbonyl-containing group that further includes two additional heteroatoms bonded to the carbon atom of the (thio) carbonyl, and R3 is a long chain alkyl group;
- and
- b) from 0.75 to 1.25 weight percent, relative to the composition, of dioctyl sulfosuccinate.
2 more elements
Dependencies are inferred from the claim text.