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Water-based nano high-coverage 3D printing coating and preparation method thereof

A 3D printing, water-based technology, applied in dyeing, textile and papermaking, additive processing, etc., can solve the problems of large color differences in batches, poor printing three-dimensional effect, low color fastness, etc., and achieve low production costs , strong three-dimensional effect, and broad application prospects

Inactive Publication Date: 2017-08-18
深圳凯奇化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] For digital printing ink, a certain amount of wastewater will be generated in the process of pre-treatment sizing and post-treatment washing, and all current digital printing inks have low covering rate, poor three-dimensional effect of printing, poor versatility, and poor film elasticity. , the color fastness is not high (grade 3-4), and the batch color difference is large, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0031] In a second aspect, there is provided a method for preparing the water-based nano high-coverage 3D printing coating according to the first aspect, comprising the following steps:

[0032] S1: Mix and dehydrate polyester polyols and mixed polyols containing at least two sodium sulfonate groups in the molecular main chain, and then perform prepolymerization with aromatic diisocyanate at a mass ratio of 1:2 to obtain polyurethane prepolymer;

[0033] S2: performing a capping reaction between the polyurethane prepolymer and the small molecule diol at a mass ratio of 1:2 to obtain a capped polyurethane;

[0034] S3: adding acetone to dilute and emulsify the blocked polyurethane, and then adding an amine chain extender to perform a chain extension reaction to obtain a polyurethane dispersion;

[0035] S4: removing the acetone in the polyurethane dispersion to obtain the waterborne polyurethane resin;

[0036] S5: preparing the water-based nano-scale color paste;

[0037] S...

Embodiment 1

[0047] S1: Mix and dehydrate polyester polyols and mixed polyols containing at least two sodium sulfonate groups on the molecular main chain at 150°C, and then mix with aromatic diisocyanate at a mass ratio of 1:2 at 80°C Carry out prepolymerization reaction, make polyurethane prepolymer;

[0048]S2: Perform a capping reaction between the polyurethane prepolymer and the small molecule diol at a mass ratio of 1:2 at 75° C. to obtain a capped polyurethane;

[0049] S3: adding acetone to dilute and emulsify the end-capped polyurethane, and then adding diethyltoluenediamine to carry out chain extension reaction at 85° C. to obtain a polyurethane dispersion;

[0050] S4: removing the acetone in the polyurethane dispersion to obtain the water-based polyurethane resin with a solid content of 50%;

[0051] S5: Add deionized water, propylene glycol, dispersant, and organic pigments into the dispersing kettle at a mass ratio of 50:5:10:35, stir at 1500 rpm for 1 hour, and fully mix unt...

Embodiment 2

[0054] S1: Mix and dehydrate polyester polyols and mixed polyols containing at least two sodium sulfonate groups on the molecular main chain at 140°C, and then mix with aromatic diisocyanate at a mass ratio of 1:2 at 80°C Carry out prepolymerization reaction, make polyurethane prepolymer;

[0055] S2: Perform a capping reaction between the polyurethane prepolymer and the small molecule diol at a mass ratio of 1:2 at 80° C. to obtain a capped polyurethane;

[0056] S3: adding acetone to dilute and emulsify the end-capped polyurethane, and then adding diethyltoluenediamine to carry out chain extension reaction at 80° C. to obtain a polyurethane dispersion;

[0057] S4: removing the acetone in the polyurethane dispersion to obtain the water-based polyurethane resin with a solid content of 56%;

[0058] S5: Add deionized water, propylene glycol, dispersant, and organic pigments into the dispersion kettle at a mass ratio of 50:5:10:35, stir at 1500 rpm for 1.5 hours, and mix until...

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Abstract

The invention provides a water-based nano high-coverage 3D printing coating which is prepared from water-based polyurethane resin, water-based nanoscale color paste, ionized water and propylene glycol at the mass ratio of (75-90):(6-10):(9-11):(1-3), wherein the solid content of the water-based polyurethane resin is 50-60%; and the fineness of the water-based nanoscale color paste is 85-100nm. The preparation method of the water-based nano high-coverage 3D printing coating comprises the main steps of preparing the water-based polyurethane resin and the water-based nanoscale color paste separately, and then fully mixing the water-based polyurethane resin, the water-based nanoscale color paste, the ionized water and the propylene glycol at the mass ratio; and adding a polyurethane thickening agent for viscosity control to prepare the water-based nano high-coverage 3D printing coating. The water-based nano high-coverage 3D printing coating has the characteristics of high coverage rate, high elasticity and high third dimension, can adapt to the diversity of printing materials, and is relatively low in production cost and suitable for large-scale industrial production, therefore, the water-based nano high-coverage 3D printing coating has potential market values and wide application prospects.

Description

technical field [0001] The invention belongs to the field of polymer materials, and relates to a 3D printing coating, in particular to a water-based nano high covering 3D printing coating and a preparation method thereof. Background technique [0002] The environmentally friendly digital printing process has the advantages of energy saving and emission reduction, bright colors, high precision and good hand feeling. Its advanced production principles and technical measures have brought new concepts and unprecedented opportunities to the textile printing industry. my country's digital printing started late, and advanced digital printing machines are imported from abroad, and the corresponding digital printing ink consumables have always relied on foreign imports due to their high quality requirements. [0003] For digital printing ink, a certain amount of wastewater will be generated in the process of pre-treatment sizing and post-treatment washing, and all current digital pri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/66C08G18/46C08G18/32C08G18/12D06P1/52D06P1/44D06P1/651D06P5/30B33Y70/00
CPCC08G18/6651B33Y70/00C08G18/12C08G18/324C08G18/4676D06P1/44D06P1/5285D06P1/65118D06P5/30C08G18/3203
Inventor 徐建成
Owner 深圳凯奇化工有限公司
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