METHOD OF PRODUCTION OF WHITE PAPER Russian patent published in 2015 - IPC D21H21/30 D21H21/28 

Abstract RU 2564815 C2

FIELD: textiles, paper.

SUBSTANCE: invention relates to a method of production of white paper. The method comprises adding the pulp to the aqueous composition comprising a) at least one optical brightener from the group of derivatives of diaminostilbene series of the formula (I), mentioned in the description, b) at least one tinge dye of formula where M, R3, R4 have the meanings mentioned in the description, c) optionally one or more auxiliary substances and d) water.

EFFECT: proposed method provides enhancement of paper brightness while increasing or maintaining its shine.

17 cl, 4 tbl, 4 ex

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RU 2 564 815 C2

Authors

Greter-Shene Khajdrun

Kljajn Sedrik

Brevo Frederik

Atkinson Dejvid

Dzhehkson Ehndrju Klajv

Dates

2015-10-10Published

2011-07-22Filed