Ester-soluble polyurethane compound printing ink with high composite strength and preparation method thereof

A technology of composite strength and polyurethane, which is applied in the direction of ink, household utensils, applications, etc., can solve the problems of affecting the central nervous system of the brain, poor compatibility, and strong irritating odor, and achieves strong printing adaptability, high transparency, and internal The effect of poly strength and strong adhesion

Active Publication Date: 2014-03-12
BAUHINIA VARIEGATA INK ZHEJIANG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because ester alcohol solvents do not have a good compatibility with traditional plastic ink binders, this type of ink contains a large amount of benzophenone solvents, and these solvents ar

Method used

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  • Ester-soluble polyurethane compound printing ink with high composite strength and preparation method thereof
  • Ester-soluble polyurethane compound printing ink with high composite strength and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A preparation method of amide-modified polyurethane resin in an ester-soluble polyurethane composite ink comprises the steps:

[0035] (1) Synthesis of hydroxyl-terminated amide polyester: Weigh each raw material according to the set ratio, put 500g of adipic acid and 376g of 2-methyl-1,3-propanediol into the reaction kettle, and slowly heat up to The temperature of the kettle reaches 140°C for dehydration; when the dehydrated water reaches 120g, continue to heat up and start vacuuming for vacuum polycondensation, gradually increase the vacuum degree of the system, and reach -0.098MPa within 2 hours, control the temperature in the kettle to 230℃, wait for the After the acid value of the resin solution is less than 8mgKOH / g, cool down to 170°C; add 59.64g of phthalic anhydride, gradually increase the temperature until the acid value is 35mgKOH / g, then cool down to 100°C; add 10.42g of ethylenediamine, at 120°C Conditional reaction for 4 hours; then add 22.5 g of ethanola...

Embodiment 2

[0039] A preparation method of amide-modified polyurethane resin in an ester-soluble polyurethane composite ink comprises the steps:

[0040] (1) Synthesis of hydroxy-terminated amide polyester: Weigh each raw material according to the set ratio, and weigh 976g of adipic acid, 144g of 2-methyl-1,3-propanediol and 1,4-butanediol Put 577g into the reaction kettle, and slowly raise the temperature until the temperature of the kettle reaches 160°C for dehydration; when the dehydrated water reaches 240g, continue to raise the temperature and start vacuuming for vacuum polycondensation, and gradually increase the vacuum degree of the system until it reaches -0.098MPa within 3 hours. The internal temperature is 240°C. After the acid value of the resin liquid in the kettle is less than 8mgKOH / g, the temperature is lowered to 170°C; after adding 146.17g of phthalic anhydride, the temperature is gradually increased to react until the acid value is 40mgKOH / g, and then the temperature is l...

Embodiment 3

[0044] The preparation method of the amide-modified polyurethane resin in the ester-soluble polyurethane composite ink provided in this example is basically the same as that of Example 1, except that: 665 g of isophthalic acid, 2-methyl-1,3-propanediol 440g, phthalic anhydride 76g, propylenediamine 13.7g, 2-amino-2-methylpropanol 46.1g The synthetic molecular weight M is 2800, the hydroxyl value is 40mgKOH / g, the acid value is 0.5mgKOH / g terminal hydroxyl group Amide polyester; 66.87g of isophorone diisocyanate, 500g of hydroxyl-terminated amide polyester and 378g of ethyl acetate to synthesize amide-modified polyurethane prepolymer, the content of -NCO is 0.9%; 6.92g of hexamethylenediamine, ethyl acetate 258g, isopropanol 258g, amide-modified polyurethane prepolymer 500g chain extension to obtain polyurethane finished product, the average molecular weight M of gained modified polyurethane resin is 28000, viscosity 960mpa·s, and solid content is 30%.

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Abstract

The invention relates to compound printing ink, in particular to ester-soluble polyurethane compound printing ink and a preparation method thereof. The compound printing ink comprises the following components by weight percentage: 27 to 32 percent of modified polyurethane resin, 6 to 15 percent of vinyl chloride-vinyl acetate copolymer liquid, 8 to 33 percent of a pigment, 0.4 to 0.8 percent of a dispersing agent, 0.3 to 0.5 percent of wax powder, 0.2 to 0.8 percent of an antistatic agent, 0.2 to 0.5 percent of an anti-precipitating agent, 0.5 to 1.5 percent of an adhesive force reinforcing agent, 10 to 25 percent of propyl acetate, 5 to 15 percent of ethyl acetate, and 10 to 20 percent of butyl acetate. The compound ink prepared in the invention has the advantages as follows: the tinting strength is high; the color is bright; the transparency is high; the printing adaptability is high, so that the compound printing ink can be widely applied to high-low speed printing of plastic flexible packaging composite materials such as PET, NY and BOPP; the adhesive force to various plastic film base materials is great, and firmness is achieved; resistance to corrosion of acid, alkali and the like is high; hot adhesion phenomena are avoided; the water resistance is high; the temperature resistance is high, so that the compound printing ink can meet the processing requirements of follow-up processes such as boiling, high-temperature cooking, food refrigerating, and is high in storage stability.

Description

technical field [0001] The invention relates to a composite ink, in particular to an ester-soluble polyurethane composite ink and a preparation method thereof. Background technique [0002] With the development of China's economy and cultural undertakings, the printing, publishing and packaging industries are developing rapidly, and the domestic demand for inks has increased sharply. According to statistics, the consumption of flexible packaging inks in my country has maintained a growth rate of 25% year by year, which also means that the consumption of binders for inks is also growing at a high speed. As an important part of the ink, the binder largely determines the viscosity, viscosity, dryness, fluidity and other properties of the ink. If you want to get high-quality ink, you must use high-quality resin for ink. Plastic gravure printing ink mainly includes the following three series according to the binder: chlorinated polypropylene, polyamide and polyurethane. Polyam...

Claims

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Application Information

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IPC IPC(8): C09D11/102C09D11/106C09D11/033C08G18/65C08G18/60
Inventor 徐洋
Owner BAUHINIA VARIEGATA INK ZHEJIANG
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