Hydrophobic fixation ink and preparation process thereof

Abstract

The invention discloses hydrophobic fixation ink. The hydrophobic fixation ink comprises the following components in parts by weight: 28 to 31 parts of modified adhesive material, 43 to 46 parts of amino hydrophobic pigments, 12 to 13 parts of glutaric dialdehyde, 9 parts of sodium hydroxide, 45 parts of methanol, 16 to 18 parts of oxidized starch, 8 to 10 parts of hexamethylene diisocyanate, 2 to3 parts of a defoaming agent, 3 to 4 parts of a dispersing agent, 3 to 4 parts of liquid paraffin, 1 to 2 parts of afilm forming additive, and 150 parts of ethanol. After the surface of the pigment is coated with a layer of hydrophobic composite film, the pigment has the ultrahigh hydrophobic performance; meanwhile, by introducing amino onto the composite film, the viscosity of the modified adhesive material is improved compared with the original polyvinyl alcohol adhesive materialby virtue of the polymerization of vinyl acetate and acrylamide, so that the adhesion performance is improved; and meanwhile, the amino is introduced into the adhesive material, the amino hydrophobic pigment is composited compounded onto the adhesive material under the cross-linking effect in the presence of glutaric dialdehyde, so that the whole adhesive material netted structure comprises a great amount of hydrophobic groups, and the prepared ink has ultrahigh hydrophobic capability.

Description

technical field [0001] The invention belongs to the field of ink preparation, and relates to a hydrophobic color-fixing ink and a preparation process thereof. Background technique [0002] Ink is prepared by mixing pigments, binders and additives in a certain proportion. Printing marks can be realized through inks to meet the needs of people's records. However, under the action of external conditions, such as external friction or rain erosion, printing marks It will peel off or be soaked. In order to prevent the peeling of the printed mark caused by external force friction, the existing ink usually uses a linker with a high bonding capacity to fix the pigment in the ink so that the pigment is not easy to peel off. However, the existing adhesive The binder not only has low bonding performance, but also disperses the pigment through mechanical action, so that the pigment is dispersed unevenly. The pigment in the ink is not only easy to peel off under the action of external for...

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Problems solved by technology

[0003] The object of the present invention is to provide a hydrophobic color-fixing ink and its preparation process. After coating the surface of the pigment with a layer of hydrophobic composite film, the ink makes the pigment itself have super-hydrophobic performance, and at the same time introduces amino groups into the composite film. , and for the modified binder through the polymerization of vinyl acetate and acrylamide, compared with the original polyvinyl alcohol binder, the relative molecular weight and viscosity increase, thereby improving the bonding performance, and at the same time in the binder The amino group is introduced, and the cross-linking effect of the aminated hydrophobic pigment is compounded on the binder through the action of glutaraldehyde. Compared with the existing mechanical stirring and mixing, the pigment can be evenly dispersed on the binder network structure through chemical mixing. , so that the entire binder network structure contains a large number of hydrophobic groups, so that the prepared ink has a super high hydrophobicity as a whole, and thus solves the problem that the existing ink is usually directly filled with a hydrophobic agent, but the hydrophobic agent cannot be uniformed by mechanical stirring Dispersed in the ink, and the pigment itself does not have hydrophobic properties, so that the water penetrates through the pigment

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