Casein type aqueous ink and method for preparing same

A water-based ink and casein technology, applied in inks, household appliances, applications, etc., can solve the problems of poor heat resistance of polyurethane and unsuitable for use under high temperature conditions, and achieve improved performance, heat resistance and solution consistency. reasonable effect

Inactive Publication Date: 2006-09-06
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Polyurethane is a good bonding material. Water-based polyurethane can increase the consistency of the solution by associating in water, but polyurethane has poor heat resistance and is not suitable for use under high temperature conditions.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] (1) Synthesizing a polyurethane prepolymer with a molar ratio of -NCO and -OH of 1.2:1 (called prepolymer before being hydrated), and the mass percentage of solvent acetone in the prepolymer is 30%. In the solvent acetone, add PEG400 (polyethylene glycol), dimethylolpropionic acid (DMPA), isophorone diisocyanate (IPDI), heat up to 90 ° C, add 2 drops of catalyst di-n-butyltin laurate ( 0.05ml), carry out polymerization reaction, stop heating after 3.5 hours (measure the NCO value of reaction system with n-butylamine method), make polyurethane prepolymer; Cool to 50 ℃, add triethylamine (TEA) (triethylamine The number of moles is equal to the number of moles of dimethylol propionic acid) to neutralize, and add water to form a polymer solution with a solid content of 40%, which is a brown viscous liquid (PU-1). Add hydrophobic Type clay (clay (Clay tone II), U.S. Laporte company), make clay weight concentration be 1% in solution, stir to obtain clay intercalation polyuret...

Embodiment 2

[0022] (1) Synthesize a polyurethane prepolymer with a molar ratio of -NCO and -OH of 1.2:1, and the mass percentage of pyrrolidone as a solvent in the prepolymer is 30%. In the solvent pyrrolidone, add PEG600 (polyethylene glycol), dimethylolpropionic acid (DMPA), isophorone diisocyanate (IPDI), raise the temperature to 80-90°C, add the catalyst di-n-butyltin dilaurate 0.05 ml, carry out the polymerization reaction, stop heating after 3 hours (measure the NCO value of the reaction system with n-butylamine method), and obtain the polyurethane prepolymer; cool to 60 ℃, add triethylamine (TEA) (triethylamine mole (equivalent to dimethylolpropionic acid moles) neutralize, and add water to form a polymer solution with a solid content of 40%, which is a brown viscous liquid (PU-2), and add hydrophobic clay to the polymer solution (clay (Clay tone II), U.S. Laporte company), make the weight concentration of clay in the solution be 2%, stir to obtain clay intercalation polyurethane (...

Embodiment 3

[0026] (1) Synthesize a polyurethane prepolymer with a molar ratio of -NCO and -OH of 1.3:1, and the mass percentage of ethyl acetate as a solvent in the prepolymer is 30%. In the solvent ethyl acetate, add hexyl adipate diol with a weight average molecular weight of 500, dimethylol propionic acid (DMPA), isophorone diisocyanate (IPDI), heat up to 80°C, add catalyst two Di-n-butyltin laurate 0.05ml, carry out polymerization reaction, stop heating after 3.5 hours (measure the NCO value of reaction system with n-butylamine method), make polyurethane prepolymer; Cool to 55 ℃, add triethylamine (TEA) (the number of moles of triethylamine is equal to the number of moles of dimethylolpropionic acid) to neutralize, and add water to form a polymer solution with a solid content of 30%, which is a brown viscous liquid (PU-3). Add hydrophobic clay (clay (Clay tone II), U.S. Laporte company) in the solution, make clay weight concentration in solution be 2%, stir to obtain clay intercalati...

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Abstract

The invention discloses a cheese water-type ink and its process for preparing. The method is as follows: polymerizing arbowax or polyester diol, dimethylol propionic acid and isophorone diisocyanate under accelerating effect of catalyst, stopping heating after 3-5 hours; adding triethylamine to neutralize after cooling, and adding water to prepare polymer solution with 20-40 % of solid content, adding drainable clay, stirring to obtain clay intercalation polyurethane, dissolving dry casein into the water in alkali condition, preparing to obtain aqueous solution of dry casein with 10-20 % of solid content; mixing intercalation polyurethane with aqueous solution of dry casein evenly to produce junction material of water-type ink, and adding pigments, alcohol, anti-fungus agent and water, grinding, adjusting viscosity to obtain water-type ink. The invention selects renewable natural resources as its main film forming matter, so it is environment-friendly and can save energy; the said water-type ink is of simple process and reasonable cost; and the quality of the obtained ink meets the requirement of the decorative laminate printing.

Description

technical field [0001] The invention relates to water-based ink, in particular to a water-based ink with modified casein as the main binder and a preparation method thereof. Background technique [0002] Water-based inks are environmentally friendly and are gradually replacing solvent-based inks in modern packaging and printing. Acrylate emulsion soluble in alkaline water is a commonly used binder for water-based inks. The solubility of the binder in alkaline water is similar to that of copolymers in organic solvent system inks, so it is suitable for high-speed printing on the printing roller, mesh and transfer process of the binder. The requirement of repeated dissolution (resolvability) of the original ink is widely used in practice. However, when applied in gravure printing decorative paper ink, there are defects such as easy anti-sticking of the coating film when processed at 150-190 °C, insufficient glue absorption, and easy decolorization w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D11/08
Inventor 黄志虹张黎明苏韦佳
Owner SUN YAT SEN UNIV
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