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Water-based double-component light-cured polyurethane resin and preparation method thereof

A polyurethane resin, water-based two-component technology, applied in polyurea/polyurethane coatings, polyurea/polyurethane adhesives, adhesive types, etc., can solve hidden safety hazards in the production process, cumbersome preparation process, increase production costs, etc. problems, to achieve the effects of reducing production safety hazards, simple preparation process, and low production cost

Active Publication Date: 2012-07-18
QINGDAO FUSILIN CHEM SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The above-mentioned prior art is mainly based on the requirements of different performances, and the soft and hard segments and the double bond density of the water-based photocurable polyurethane resin are continuously improved, and the prepared Resins are all one-component, so a series of resins need to be prepared to meet different performance requirements. The preparation process is cumbersome and the production cost is high.
Moreover, the current main preparation methods of water-based photocurable polyurethane resin (specific process such as Figure 1) introduces dimethylolpropionic acid (DMPA) to make the main chain obtain hydrophilic groups, but a large amount of acetone needs to be added to dissolve DMPA during the preparation process. This method not only increases the production cost, And it brings safety hazards to the production process

Method used

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  • Water-based double-component light-cured polyurethane resin and preparation method thereof
  • Water-based double-component light-cured polyurethane resin and preparation method thereof
  • Water-based double-component light-cured polyurethane resin and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] 1) Add 6g of trimethylolpropane into a 250ml three-neck flask with stirring, nitrogen inlet and outlet, then add 0.3g of p-toluenesulfonic acid catalyst, under the protection of nitrogen, heat to 140°C and slowly add 54g of dihydroxy Methyl propionic acid, and stirred for 1 hour, stop nitrogen flow, vacuumize (vacuum degree is 400 Pa), and continue to react for 2 hours to obtain a hydroxyl-terminated hyperbranched polymer.

[0039] 2) After cooling the hydroxyl-terminated hyperbranched polymer obtained in step 1 to 90°C, add 42g of maleic anhydride and 30g of acetone as a solvent. The reaction process was tracked by the acid value titration method. When the acid value of the solution became about half of the initial value and did not decrease with time, the reaction was stopped to obtain a carboxyl-terminated hyperbranched polymer.

[0040] 3) Raise the temperature of the carboxyl-terminated hyperbranched polymer obtained in step 2) to 105°C, then add 8g of glycidyl met...

Embodiment 2

[0046] Do not change other conditions in example 1, only change 8g glycidyl methacrylate to 16g glycidyl methacrylate, can obtain solid content and be the aqueous photocurable polyurethane resin of 40 Wt.%, wherein photosensitive group content increases to 0.34 mmol / g.

Embodiment 3

[0048] Without changing the other conditions in Example 1, only 10 g of polyethylene glycol (molecular weight 1000) is replaced by 20 g of polyethylene glycol (molecular weight 2000), and a water-based photocurable polyurethane resin with a solid content of 42Wt.% can be obtained, in which the soft chain The segment content increases, and the flexibility of the film-forming material increases.

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Abstract

The invention discloses a water-based double-component light-cured polyurethane resin, which comprises the following components in part by mass: 10 to 60 parts of hydrophilic polyisocyanate serving as a component A, 5 to 40 parts of diol with the molecular weight of 400 to 3,000 and 10 to 50 parts of water-based hyperbranched resin containing photosensitive groups, wherein the diol and the water-based hyperbranched resin serve as components B. The resin is prepared by the following steps of: mixing the components B and the component A, adding deionized water, reacting completely with stirring, and thus obtaining the water-based double-component light-cured polyurethane resin of which solid content is 20 to 60 weight percent. The resin has a good environment-friendly effect, the preparation method is simple and facilitates industrialization, the ratio of soft and hard chain segments and the density of photosensitive groups of the prepared resin can be adjusted according to different performance requirements, and the resin has a broad application prospect in the fields of coating, adhesive and ink.

Description

technical field [0001] The invention relates to a water-based two-component photocurable polyurethane resin and a preparation method thereof. Background technique [0002] Photocuring technology is an efficient, environmentally friendly, energy-saving, high-quality material surface treatment technology, known as a new technology for the green industry in the 21st century. The most common photocurable products are coatings, adhesives and inks. Among the components of photocurable products, oligomers are the main body of photocurable products, and their properties basically determine the main properties of cured materials. Water-based light-curing polyurethane resin is an environmentally friendly resin that uses water as a dispersion medium on the basis of traditional light-curing technology. It is widely used in coatings, adhesives and Ink and other fields. [0003] There are many reports on the preparation method of water-based photocurable polyurethane resin. Chinese pate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/68C08G18/48C08G63/91C09D175/14C09J175/14
Inventor 陈坤林庄东青
Owner QINGDAO FUSILIN CHEM SCI & TECH
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