FIELD: chemistry.
SUBSTANCE: invention relates to compositions for optical brightening and tinting paper. The composition includes (a) at least one optical brightening agent selected from a group of diaminostilbene derivatives of formula (I) given in the description, (b) at least one tinting dye of formula
,
where M, R3, R4 have values given in the description, (c) at least one white pigment, (d) at least one primary binding compound, (e) optionally one or more secondary binding compounds and (f) water.
EFFECT: invention provides high degree of whiteness of paper while increasing or preserving its lustre.
16 cl, 4 tbl, 2 ex
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Authors
Dates
2015-09-27—Published
2011-06-21—Filed