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Binder for aqueous liquid ink, aqueous liquid ink and printed matter

A water-based liquid and adhesive technology, applied in the direction of ink, application, household utensils, etc., can solve the problems of reducing resolvability, not being able to print in a long run, and not spreading faster, and achieve excellent resolvability.

Active Publication Date: 2021-12-31
DAINIPPON INK & CHEM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, compared with solvent-based liquid inks, water-based liquid inks have advantages in terms of adhesion to films, anti-blocking with backside smearing of printed patterns, and mutual contamination caused by ink drying on plates during long-run printing. In terms of "ink resolvability", seek to further improve performance, otherwise it will not be fully recognized, and it is not expected to be popularized faster. This is the current situation of water-based liquid ink
[0007] As an example of the front printing water-based ink composition for packaging, a polyhydrazide compound and a polyamine compound other than the polyhydrazide compound are reacted with an isocyanate group-containing polymer, and the organic solvent solution of the polyurethane resin thus obtained is mixed with ammonia water Although the invention of using water-soluble polyurethane resin as an adhesive by neutralizing it with deionized water has been completed, it cannot be said that the resolubility is sufficient even if the adhesion and anti-blocking properties to the film can be maintained. In particular, it cannot be said that it can withstand long-run printing (for example, Patent Document 1: Japanese Patent Application Laid-Open No. 8-053641)

Method used

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  • Binder for aqueous liquid ink, aqueous liquid ink and printed matter
  • Binder for aqueous liquid ink, aqueous liquid ink and printed matter
  • Binder for aqueous liquid ink, aqueous liquid ink and printed matter

Examples

Experimental program
Comparison scheme
Effect test

Synthetic example 1

[0086] (Synthesis Example 1: Preparation of Binder for Aqueous Liquid Ink (1))

[0087] 191 parts by mass of polyoxytetramethylene glycol (molecular weight: 2000), 141 parts by mass of isophorone diisocyanate, 2,2- 26 parts by mass of dimethylolpropionic acid react in a mixed solvent of 28 parts by mass of 1,4-cyclohexanedimethanol and 200 parts by mass of methyl ethyl ketone to obtain a prepolymerized carbamate having an isocyanate group at the molecular end. organic solvent solutions.

[0088] Next, by adding 20 parts by mass of a 50% potassium hydroxide aqueous solution, part or all of the carboxyl groups contained in the above-mentioned urethane prepolymer were neutralized, and 700 parts by mass of water and 9.0 parts by mass of an 80% aqueous hydrazine solution were added to fully Stirring was carried out to obtain an aqueous dispersion of polyurethane resin, followed by aging-desolventization to obtain a binder for aqueous liquid ink (1) with 40% by mass of non-volatile...

Synthetic example 2

[0091] (Synthesis Example 2: Preparation of Binder for Aqueous Liquid Ink (2))

[0092] 256 parts by mass of polyoxytetramethylene glycol (molecular weight: 2000), 102 parts by mass of isophorone diisocyanate, 2,2-bis 23 parts by mass of methylolpropionic acid were reacted in a mixed solvent of 6.5 parts by mass of neopentyl glycol and 200 parts by mass of methyl ethyl ketone to obtain an organic solvent solution of a urethane prepolymer having an isocyanate group at a molecular end.

[0093] Next, by adding 18 parts by mass of a 50% potassium hydroxide aqueous solution, part or all of the carboxyl groups contained in the above-mentioned urethane prepolymer were neutralized, and 700 parts by mass of water and 6.5 parts by mass of an 80% aqueous solution of hydrazine were added to fully Stirring was carried out to obtain an aqueous dispersion of polyurethane resin, followed by aging-desolventization to obtain an aqueous liquid ink binder (2) with 40% by mass of non-volatile com...

Synthetic example 3

[0095] (Synthesis Example 3: Preparation of Binder for Aqueous Liquid Ink (3))

[0096] 263 parts by mass of polyoxytetramethylene glycol (molecular weight: 2000), 98 parts by mass of isophorone diisocyanate, 2,2-bis 22 parts by mass of methylolpropionic acid react in a mixed solvent of 5.6 parts by mass of 1,4-cyclohexanedimethanol and 200 parts by mass of methyl ethyl ketone to obtain a urethane prepolymer having an isocyanate group at the molecular end of organic solvent solutions.

[0097] Next, by adding 17 parts by mass of a 50% potassium hydroxide aqueous solution, part or all of the carboxyl groups possessed by the above-mentioned urethane prepolymer was neutralized, and 700 parts by mass of water and 6.2 parts by mass of an 80% aqueous hydrazine solution were added and fully stirred, Thus, an aqueous dispersion of the polyurethane resin was obtained, followed by aging-desolventization, to obtain a binder for aqueous liquid ink (3) with 40% by mass of non-volatile mat...

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Abstract

The present invention provides a binder for an aqueous liquid ink that is excellent in adhesion to a base material, anti-blocking properties, and re-solubility of the ink, and an aqueous liquid composition containing the binder. A binder for aqueous liquid ink, characterized in that it contains polyurethane resin (A) as a reaction product of polyol (a1) and polyisocyanate (a2) and an aqueous medium (B), said polyol (a1 ) contains a polyol (a1-1) having an acidic group and a polyether polyol (a1-2) other than the polyol (a1-1), the acidic group of the polyurethane resin (A) being dissolved in a metal salt And, the polyurethane resin (A) contains an alicyclic structure in a range of 1000 to 5000 mmol / kg based on the total amount of the polyurethane resin (A).

Description

Technical field [0001] The present invention relates to a resin binder for aqueous liquid ink that can be used for aqueous gravure printing and aqueous flexographic printing, and an aqueous liquid ink composition. Background technique [0002] In order to impart beauty and functionality to the printed matter, water-based gravure printing and water-based flexographic printing are widely used. [0003] In recent years, in the printing ink industry, based on the perspective of sustainable development against the background of the worsening of air pollution caused by VOCs contained in solvent-based printing inks and the global expansion of global warming, in addition to occupational safety and health, Furthermore, it is flammable and explosive, and there is a trend to switch away from petroleum resources. The restrictions on the use of organic solvents are becoming increasingly strict. [0004] On the other hand, population growth, rising income levels, and changes in logistics...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D11/102
CPCC09D11/102
Inventor 佐坂利桂小田克郞石桥岁德冈康孝永浜定佐竹直人
Owner DAINIPPON INK & CHEM INC
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