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Bio-based polyurethane water-based ink and preparation method thereof

A technology of water-based ink and polyurethane, which is applied in ink, application, household appliances, etc., can solve the problems of poor biodegradability and achieve the effect of improving scratch resistance, improving scratch resistance, and avoiding brittleness

Inactive Publication Date: 2021-09-03
HEFEI KETIAN WATERBORNE TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Although the current water-based ink has improved the ink construction environment, its final products are mainly petroleum-based products with poor biodegradability

Method used

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  • Bio-based polyurethane water-based ink and preparation method thereof
  • Bio-based polyurethane water-based ink and preparation method thereof

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preparation example Construction

[0029] The invention provides a kind of preparation method of bio-based water-based polyurethane hot melt adhesive, comprising the following steps:

[0030] (1) Preparation of prepolymer: put bio-based isocyanate, bio-based macromolecular polyol, polypropylene carbonate polyol, carboxylic acid type hydrophilic chain extender and catalyst in the reaction kettle, and set the temperature at 70-95°C Stirring reaction obtains polyurethane prepolymer;

[0031] (2) Emulsification and desolventization: cool down the polyurethane prepolymer obtained in step (1) to 40-60°C, add a viscosity reducer, a salt-forming agent and a sulfonic acid-type hydrophilic chain extender, stir and react in a disperser Add water to emulsify, then remove the viscosity reducer to obtain polyurethane emulsion;

[0032] (3) Preparation of ink resin: adding a crosslinking agent to the polyurethane emulsion obtained in step (2) to react to obtain the bio-based matte polyurethane water-based ink resin.

[0033...

Embodiment 1

[0049] A kind of preparation of bio-based polyurethane water-based ink:

[0050] Weigh 120g of 1,3-propanediol polyether polyol (molecular weight 2000), 60g polypropylene carbonate polyol and 216g dimer acid diisocyanate (molecular weight 600), stir and react at 90°C for 2h; then add 6g Dimethylolpropionic acid (DMPA), continue to stir and react at 80°C for 2h; then add 0.8g of catalyst, cool the reaction temperature to 60°C, and continue to react for 3h; cool the prepolymer to 50°C, add 350g of viscosity-reducing acetone , add 4.53g of triethylamine to react for 3min, then add 18g of sodium ethylenediaminoethylsulfonate (A95) to continue the reaction for 30min, then discharge the material into a plum barrel, add 615g of emulsified water in the disperser to emulsify and open, the disperser speed 2000~3500r / min, put the acetone off after standing for 8 hours, then put the emulsion in a plum blossom bucket and add 30g of multifunctional aziridine type crosslinking agent under th...

Embodiment 2

[0052] A kind of preparation of bio-based polyurethane water-based ink:

[0053] Weigh 120g of 1,3-propanediol polyether polyol (molecular weight 2000), 60g polypropylene carbonate polyol and 216g dimer acid diisocyanate (molecular weight 600), stir and react at 90°C for 2h; then add 6g Dimethylolpropionic acid (DMPA), continue to stir and react at 80°C for 2h; then add 0.8g of catalyst, cool the reaction temperature to 60°C, and continue to react for 3h; cool the prepolymer to 50°C, add 350g of viscosity-reducing acetone , add 4.53g of triethylamine to react for 3min, then add 18g of sodium ethylenediaminoethylsulfonate (A95) to continue the reaction for 30min, then discharge the material into a plum barrel, add 615g of emulsified water in the disperser to emulsify and open, the disperser speed 2000~3500r / min, put the acetone off after standing for 8 hours, then put the emulsion in a plum blossom bucket and add 30g of multifunctional aziridine type crosslinking agent under th...

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Abstract

The invention provides bio-based polyurethane water-based ink and a preparation method thereof. The preparation method comprises three steps of preparation of a prepolymer, emulsification desolvation and preparation of ink resin. The bio-based polyurethane water-based ink comprises the following components: bio-based isocyanate, bio-based macromolecular polyol, polypropylene carbonate polyol, a carboxylic acid type hydrophilic chain extender, a sulfonic acid type hydrophilic chain extender and a cross-linking agent, wherein the molar ratio of the bio-based isocyanate to the bio-based macromolecular polyol to the polypropylene carbonate polyol is 3:1:0.5-6:1:0.5, the mass of the carboxylic acid type hydrophilic chain extender is 1-2% of the mass of a polyurethane prepolymer, the mass of the sulfonic acid type hydrophilic chain extender is 2-6% of the mass of the polyurethane prepolymer, and the mass of the cross-linking agent is 1.5%-5.5% of the mass of polyurethane emulsion. According to the ink, the defect that inorganic auxiliaries such as matting powder need to be added to matte resin is overcome, the scratch resistance of the resin can be improved through the added cross-linking agent, and the alcohol solubility of the water-based ink resin is also improved through the addition of the polypropylene carbonate polyol.

Description

technical field [0001] The invention relates to the technical field of polymers, in particular to a bio-based polyurethane water-based ink and a preparation method thereof. Background technique [0002] With the change of people's aesthetic concepts, people's demand for matte products is increasing. Therefore, matte functional resins have been developed in many fields, and water-based polyurethane matte resins have also been greatly developed. However, many water-based resins are currently The matte function of polyurethane is achieved by adding additives such as polymer particles, crystalline silica and matting powder. The addition of such additives is likely to affect the stability of water-based polyurethane or cause water-based polyurethane to become brittle and become brittle. Therefore, it is of great significance to develop self-dulling matte water-based polyurethane. Especially in the ink field, most ink resins are glossy products, so the development of matte inks h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/12C08G18/66C08G18/48C08G18/44C08G18/34C08G18/32C08G18/81C09D11/102C09D11/03
CPCC08G18/12C08G18/6625C08G18/6618C08G18/44C08G18/4825C08G18/4018C08G18/8125C08G18/348C08G18/3855C09D11/102C09D11/03C08G2230/00
Inventor 李维虎王启东朱保凌戴家兵赵曦
Owner HEFEI KETIAN WATERBORNE TECH CO LTD
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