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US 7,001,435 B2Granted
Leather treatment
AssigneeAutomotive Technology, Inc.
InventorsDoug Slattery, Eric Waerkerle, Don Kamp
Life of this patent
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Abstract
An improved method for dyeing leather wit propylene glycol monomethyl ether (PGME) systems comprising adding polyacrylate resins base, C-3 and C-4 alcohols, and n-butyl acetate and negating the need for aqueous compositions, Teflon dispersions, dibutyl phthalate, and improves the dye penetration, hastens the flash times, improves the dust free time, and improves the tape time.
Claims6
In a method for dyeing leather of the type comprising:
- (a) coating onto a leather a composition comprising colorant dispersed in a propylene glycol monomethyl ether solvent system, a dibutyl phthalate elastomer, and an aqueous slurry of tetrafluoroethylene polymer to the surface of leather;
- (b) flashing and taping the coating at ambient conditions, and
- (c) repeating steps (a) and (b) to achieve from 2 to 6 coatings;
- the improvement comprising substituting a non-aqueous polyacrylate polymer resin base for the aqueous slurry of tetrafluoroethylene, and adding a mixture of C-3 and C-4 alcohol solvents and n-butyl acetate, instead of the dibutyl phthalate;
- wherein the coating composition is non-aqueous;
- and
- wherein there is achieved improved colorant penetration, improved flashing time, improved dust-free time, and improved tape time.
4 more elements
Dependencies are inferred from the claim text.