Low gloss coating composition
OwnerRobert Mitchell Blankenship, James Tinney Brown +1inventors
InventorsRobert Mitchell Blankenship, James Tinney Brown, Michael Joseph Ruggio
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Abstract
The present invention provides a low gloss coating composition having a 75° sheet gloss of 50% or less which is useful for improving the print quality of inks applied to the low gloss coating composition. The low gloss coating composition is particularly useful for increasing the difference in gloss, or delta gloss, between a substrate coated with the low gloss composition and ink applied to the low gloss coated substrate.
Claims18
A printed substrate comprising:
- a) a low gloss coated substrate comprising:
- i) a substrate;
- and
- ii) a low gloss coating formed from a low gloss coating composition comprising:
- one or more polymer particles;
- and one or more pigments;
- wherein the polymer particles comprise at least one polymer core phase containing at least one void;
- at least one polymer shell phase at least partially surrounding the core;
- and at least one channel connecting the void in the core to the exterior of the particle;
- wherein the polymer particles have an average swollen particle size of from 300 nanometers to 1500 nanometers;
- wherein the coating composition comprises from 1.0 part by weight to 50 parts by weight of the polymer particles per 100 parts of the pigment, and
- wherein a calendered substrate coated with the dried low gloss coating composition has a 75° sheet gloss of 50 percent or less;
- and
- b) dried ink,
- wherein the ink is in contact with the low gloss coating.
A method of improving the print quality of a low gloss coated substrate comprising the steps of:
- a) applying ink to the low gloss coated substrate, wherein the low gloss coated substrate comprises:
- i) a substrate;
- and
- ii) a low gloss coating formed from a low gloss coating composition comprising:
- one or more polymer particles;
- and one or more pigments;
- wherein the polymer particles comprise at least one polymer core phase containing at least one void;
- at least one polymer shell phase at least partially surrounding the core;
- and at least one channel connecting the void in the core to the exterior of the particle;
- wherein the polymer particles have an average swollen particle size of from 300 nanometers to 1500 nanometers;
- wherein the coating composition comprises from 1.0 part by weight to 50 parts by weight of the polymer particles per 100 parts of the pigment, and
- wherein a calendered substrate coated with the dried low gloss coating composition has a 75° sheet gloss of 50 percent or less;
- and
- b) drying or allowing to dry the ink to provide a printed, low gloss coated substrate.
Dependencies are inferred from the claim text.