Coating for a microporous printing sheet having improved peel strength

A method of making a coating composition for microporous printing sheets, the method comprising:

• synthesizing an acrylic copolymer from hydroxyalkyl (meth)acrylate and poly(alkylene glycol) (meth)acrylate;
• and mixing the copolymer with a dye fixative material.

A microporous printing sheet comprising:

• a layer of microporous material;
• and
• a coating on the layer of microporous material comprising an acrylic resin and a dye fixative material.

A method of coating a microporous printing sheet comprising:

• providing a layer of microporous material;
• and
• coating the layer of microporous material with a composition comprising an acrylic resin and a dye fixative material.

A laminated printed microporous sheet comprising:

• a printed microporous sheet having a coating comprising an acrylic resin and a dye fixative material;
• and
• a lamination layer covering at least a portion of the printed microporous sheet.

An inkjet printed essentially tamper-resistant security card comprising:

• an inkjet printed microporous sheet;
• and
• a lamination layer covering at least a portion of the inkjet printed microporous sheet, wherein the card has an initial peel strength of at least 10 lb/inch and a 24-hour peel strength of at least 5 lb/inch.