Compounds and their use as insolubilizers for binders for paper coating compositions
AssigneeSun Chemical Corporation
InventorSai H. Hui
Life of this patent
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Abstract
Paper coating compositions contain at least one pigment, at least one binder, and, as an insolubilizer for the binder, the product of the reaction of a low molecular weight polyacrylamide with glyoxal and a urea or a cyclic urea.
Claims13
An insolubilizer for binders for paper coating compositions which comprises the product of the reaction of (a) about 1.65 to 12,000 parts by weight of a polyacrylamide, (b) about 1.35 to 500 parts by weight of glyoxal, and (c) about 1 to 250 parts by weight of a urea or a cyclic urea, the reaction being carried out at a temperature within the range of about 25.degree. to 100.degree. C. and the binder being selected from the group consisting of starch;
- oxidized starch;
- enzyme-converted starch;
- starches having hydroxyl, carboxyl, amido, or amino groups;
- proteins;
- and their mixtures.
The product of the reaction of (a) about 1.65 to 12,000 parts by weight of a polyacrylamide, (b) about 1.35 to 500 parts by weight of glyoxal, and (c) about 1 to 250 parts by weight of a urea or a cyclic urea, the reaction being carried out at a temperature within the range of about 25.degree. to 100.degree. C.
Dependencies are inferred from the claim text.