Method for producing low sheet gloss coated paper

Details Method for producing low sheet gloss coated paper Method for producing low sheet gloss coated paper

D - Textiles, Paper

21

H

117/203, 400/904

D21H 19/10 (2006.01) D21H 19/58 (2006.01)

Patent

CA 1299310

ABSTRACT This invention relates to an improvement in the production of low sheet gloss coated papers which comprises using as the synthetic polymer latex binder for the aqueous coating composition employed to coat the papers, a carboxylated latex which substantially swells during the preparation of the aqueous coating composition and subsequently shrinks during the drying of the coated paper, whereby a microscopic surface roughness is obtained to yield a low sheet gloss coated paper while retaining high ink gloss without detrimental effect on ink gloss, or the printing characteristics of the coated paper. Carboxylated latexes and their methods of preparation are generally taught in the art, The carboxylation is introduced by utilizing as one of the comonomers in the preparation of tha latex a vinyl acid, such as acrylic acid, 34,505 F methacrylic acid, itaconic acid, fumaric acid, and maleic acid. The carboxylated latexes suitable for use in this invention are those which contain at least 6 parts of a vinyl acid monomer per 100 parts of total monomers. Using these carboxylated latexes as the binder for the aqueous coating composition employed to coat papers produces low sheet gloss coated papers to be prepared without the use of large pigment particles and/or specialized supercalendering techniques. 34,505-F

535593

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