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US 2024/0417569 A1Published application
Water-based primers
AssigneeSun Chemical Corporation
InventorsBruce Marshall, Benjamin Floyd
Life of this patent
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Abstract
The present invention provides water-based primer compositions comprising polyolefin type adhesion promoters. Preferably, the polyolefin type adhesion promoter is a maleated polyolefin type adhesion promoter. The primer compositions improve adhesion of water-based inks and coatings to low-treatment substrates.
Claims6
-16. (canceled)
A method of preparing a primed substrate to which water-based inks and coatings adhere well, comprising the steps of:
- (a) providing a substrate selected from the group consisting of polyethylene, polypropylene, nylon, vinyl, polyvinylchloride, and polyethylene terephthalate;
- (b) providing a water-based primer composition comprising:
- (i) a maleated polyolefin type adhesion promoter, wherein the maleated polyolefin type adhesion promoter is present in an amount of 25 wt % to 100 wt %, based on the total weight of the primer composition, wherein the maleated polyolefin type adhesion promoter is chlorine-free;
- and
- (ii) water, in an amount of 0 wt % to 75 wt %, based on the total weight of the primer composition;
- with the proviso that the primer composition does not contain a non-oxidized, non-maleated, non-chlorinated, crystalline polyolefin;
- (c) applying the primer composition to a substrate, wherein the primer composition is applied by flexographic printing, rotogravure printing, lithographic printing, or screen printing;
- (d) drying the applied primer composition on the substrate, thereby obtaining a primed substrate.
5 more elements
Dependencies are inferred from the claim text.