Cationic coating for printable surfaces
OwnerPhilip Confalone, Rajeev Farwahainventors
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Abstract
The present invention relates to a coating composition for fibrous substrates made up of 0.5 to 25 percent by weight of a water-insoluble emulsion polymer comprising from 0.4 to 3 mole percent of one or more cationic monomer units and at least 50 mole percent of at least one vinyl ester monomer; 25 to 75 percent by weight pigment; and water. The coating is useful on fibrous substrates on which liquid inks will be fixed. The cationic nature of the coating provides the substrate with an excellent point of attachment for anionic inks and dyes, resulting in bright, crisp printed images. The coating is especially useful for inkjet printing on paper, paperboard, textiles, non-wovens, and wood.
Claims13
A coating composition for fibrous substrates comprising:
- a) 0.5 to 25 percent by weight of an water-insoluble emulsion polymer comprising from greater than 0.4 to 3 mole percent of one or more cationic monomer units, and at least 50 mole percent of one or more vinyl ester monomer units;
- b) 25 to 76 percent by weight pigment;
- c) water, and
- d) cationic surfactant.
A coated fibrous substrate comprising a fibrous substrate having coated thereon on at least one surface a coating composition comprising a polymer comprising:
- a) 0.5 to 25 percent by weight of an water-insoluble emulsion polymer comprising from 0.4 to 3 mole percent of cationic functionality;
- b) 25 to 75 percent by weight pigment;
- and
- c) water.
A process for producing a coated paper comprising applying to a sized paper web a coating composition comprising a polymer comprising:
- a) 0.5 to 25 percent by weight of an water-insoluble hydrophilic emulsion polymer comprising from 0.4 to 3 mole percent of cationic functionality;
- b) 25 to 75 percent by weight pigment, and
- c) water.
Dependencies are inferred from the claim text.