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Environment-friendly acrylate modified waterborne polyurethane printing ink and preparation method thereof

A technology of water-based polyurethane and acrylate, which is applied in the field of ink and can solve problems such as easy agglomeration

Active Publication Date: 2020-12-04
ZHEJIANG HUABAO INK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this patent technical scheme, titanium dioxide is used as the white pigment of the ink, but nano-titanium dioxide is prone to agglomeration in aqueous media, and has certain photocatalytic properties, resulting in photocatalytic degradation of the ink binder

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The preparation method of acrylate-modified waterborne polyurethane comprises the following steps:

[0030] 1) Add 100g of polyethylene adipate with a molecular weight of 1000, 200g of polyoxypropylene diol with a molecular weight of 2000 and 7.68 grams of 1,4-dihydroxybutane-2 in a reactor equipped with a stirrer -Sodium sulfonate, carry out vacuum dehydration at a constant temperature of 90°C for 1 hour, then add 71g of isophorone diisocyanate, 13.5g of hexamethylene diisocyanate and 0.04g of stannous octoate catalyst, and keep warm at 80°C in a nitrogen atmosphere Reaction 3h, obtains polyurethane prepolymer 1;

[0031] 2) Lower the temperature of the reaction system in step 1) to 30° C., add 7.2 g of ethylenediamine chain extender to the polyurethane prepolymer, and keep the reaction at 35° C. for 1 hour in a nitrogen atmosphere to obtain polyurethane prepolymer 2;

[0032] 3) Add 5.16 g of di-n-butylamine end-capping agent and 4.64 g of 2-hydroxyethyl acrylate to ...

Embodiment 2

[0041] The preparation method of acrylate-modified waterborne polyurethane comprises the following steps:

[0042] 1) Add 100g of polyethylene adipate with a molecular weight of 1000, 200g of polyoxypropylene diol with a molecular weight of 2000 and 7.68 grams of 1,4-dihydroxybutane-2 in a reactor equipped with a stirrer -Sodium sulfonate, carry out vacuum dehydration at a constant temperature of 90°C for 1 hour, then add 71g of isophorone diisocyanate, 13.5g of hexamethylene diisocyanate and 0.04g of stannous octoate catalyst, and keep warm at 80°C in a nitrogen atmosphere Reaction 3h, obtains polyurethane prepolymer 1;

[0043] 2) Lower the temperature of the reaction system in step 1) to 30° C., add 7.2 g of ethylenediamine chain extender to the polyurethane prepolymer, and keep the reaction at 35° C. for 1 hour in a nitrogen atmosphere to obtain polyurethane prepolymer 2;

[0044] 3) Add 5.16 g of di-n-butylamine end-capping agent and 4.64 g of 2-hydroxyethyl acrylate to ...

Embodiment 3

[0053] The preparation method of acrylate-modified waterborne polyurethane comprises the following steps:

[0054] 1) Add 100g of polyethylene adipate with a molecular weight of 1000, 200g of polyoxypropylene diol with a molecular weight of 2000 and 7.68 grams of 1,4-dihydroxybutane-2 in a reactor equipped with a stirrer -Sodium sulfonate, carry out vacuum dehydration at a constant temperature of 90°C for 1 hour, then add 71g of isophorone diisocyanate, 13.5g of hexamethylene diisocyanate and 0.04g of stannous octoate catalyst, and keep warm at 85°C in a nitrogen atmosphere Reaction 2h, obtains polyurethane prepolymer 1;

[0055] 2) Lower the temperature of the reaction system in step 1) to 30°C, add 7.2g of ethylenediamine chain extender to the polyurethane prepolymer, and keep it warm at 40°C for 0.5h in a nitrogen atmosphere to obtain polyurethane prepolymer 2;

[0056] 3) Add 5.16 g of di-n-butylamine end-capping agent and 4.64 g of 2-hydroxyethyl acrylate to the polyuret...

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Abstract

The invention relates to the technical field of ink, and discloses environment-friendly acrylate modified waterborne polyurethane printing ink and a preparation method thereof. The printing ink comprises the following components in parts by weight: acrylate modified waterborne polyurethane, modified nano titanium dioxide, a defoaming agent, a dispersing agent and water. The preparation method comprises the following steps: adding the acrylate modified waterborne polyurethane, the defoaming agent and the deionized water into a stirring kettle, conducting stirring for 30-50 minutes at the stirring speed of 400-500 r / min, adding the modified nano titanium dioxide and the dispersing agent, and conducting stirring for 20-30 minutes at the stirring speed of 600-800 r / min, thereby obtaining the printing ink. The waterborne polyurethane printing ink prepared by the invention has the advantages of environmental protection, high solid content and excellent water resistance; and besides, the nanotitanium dioxide pigment added into the ink can be uniformly dispersed in a water-based medium, and an acrylate modified water-based polyurethane binder cannot be subjected to photocatalytic degradation, so that the service life of the ink is prolonged.

Description

technical field [0001] The invention relates to the technical field of inks, in particular to an environmentally friendly acrylate-modified water-based polyurethane printing ink and a preparation method thereof. Background technique [0002] Solvent-based inks are composed of four major components: colored dyes, binder resins (polymer resins or natural resins), organic solvents, and related additives. Often binder resins are dispersed in organic solvents, so binder components generally contain About half of its total weight of organic solvents, if exposed to for a long time, will cause a certain degree of corrosion to the skin of operators and users, and the organic volatile compounds (VOCs) contained in it can be mixed in the air during the production process and passively inhaled In the human body, it greatly threatens the health of the human body. The organic solvent components in solvent-based inks account for about half of the weight, and are extremely volatile. During...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D11/107C09D11/037C08F283/00C08F220/14C08F220/18
CPCC08F283/008C09D11/037C09D11/107C08F220/14C08F220/1804
Inventor 陶利国沈斌洪晓伟
Owner ZHEJIANG HUABAO INK
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