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Method for preparing ultraviolet (UV)-curable polyisocyanate modified superbranched epoxy acrylate

A technology of epoxy acrylate and polyisocyanate, applied in organic chemistry, coating, etc., can solve the problems of high brittleness, poor light stability, and poor flexibility of epoxy resin cured film, so as to increase added value and increase flexibility , Improve the effect of water resistance

Active Publication Date: 2011-11-09
江苏金隆新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Epoxy resin has excellent hydrolysis resistance and adhesion, and is the main raw material for coatings. However, epoxy resin also has three major disadvantages. One is that the epoxy resin has a high viscosity due to its own structure, and the other is that the epoxy resin is cured to form a film. High brittleness, poor flexibility, third, poor light stability

Method used

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  • Method for preparing ultraviolet (UV)-curable polyisocyanate modified superbranched epoxy acrylate
  • Method for preparing ultraviolet (UV)-curable polyisocyanate modified superbranched epoxy acrylate
  • Method for preparing ultraviolet (UV)-curable polyisocyanate modified superbranched epoxy acrylate

Examples

Experimental program
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Embodiment 1

[0028] a. Equipped with a spherical condenser, nitrogen enters the tube, add 200.7g maleopimaric acid into the four-necked flask with agitator, heat to 120°C, put in 100.0g maleopimaric acid triglycidyl ester, add 2.1g dibutyl Tin oxide is used as a catalyst to react until the acid value is 5mgKOH / g, and the hyperbranched compound HBR is obtained.

[0029] b. Cool down to 90°C, add 3.2g H 2 O, add 126.0 g of epichlorohydrin dropwise, and the dropping time is controlled at about 1 h, then add 3.3390 g of tetraethylammonium bromide (catalyst), and react until the acid value is 3 mgKOH / g to stop the reaction.

[0030] c. Then cool down the compound obtained in step b to 70°C, add 100.2g of NaOH aqueous solution with a concentration of 40%, add 6.3g of epichlorohydrin as a ring-closing solvent, keep the temperature at 20°C for 1h, filter the generated NaCl particles, and filter the filtrate through Wash with water until PH = 7, distill under reduced pressure to recover excess epi...

Embodiment 2

[0036] Except that the heating temperature in step a is 140° C., and the acid value is 8 mgKOH / g. In step b, the temperature is 110°C, the amount of catalyst potassium hydroxide is 4.7700g, and the acid value is 0.4mgKOH / g. In step c, the temperature was maintained at 35° C. for 1 h, and other conditions were the same as in Example 1.

Embodiment 3

[0038] Remove 229.0 g of maleopimaric acid in step a. In step b, add 5.0 g of water and 4.6210 g of dibutyltin oxide as a catalyst, and react until the acid value is 1 mgKOH / g. In step c, 91.8 g of NaOH aqueous solution with a concentration of 50% was added, and 10.0 g of epichlorohydrin was added. Acrylic acid 50.0g in step d, catalyst dibutyl tin oxide 3.5000g. In step e, TDI-HEMA is 135.0 g, and catalyst dibutyltin dilaurate is 0.9736 g. Other conditions are the same as in Example 1.

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Abstract

The invention relates to a method for preparing an ultraviolet(UV)-curable polyisocyanate modified superbranched epoxy acrylate, which comprises the following steps of: heating maleopimaric acid tri glycidyl ester, maleopimaric acid and a catalyst for esterification reaction to obtain rosin-based superbranched resin; cooling, and adding epoxy chloropropane, water and a catalyst for reaction to obtain superbranched epoxy resin; adding crylic acid, a catalyst and a polymerization inhibitor for reaction to obtain superbranched epoxy acrylic resin; and reacting the superbranched epoxy acrylic resin with ethylene glycol methacrylate terminated para toluene diisocyanate, a catalyst and a polymerization inhibitor to obtain the final product. Compared with the prior art, the method has the advantages that: rosinyl is introduced into superbranched polyester, and the hardness, strength and other special properties of the resin are improved and the curing speed is improved by utilizing the special rigid condensed ring structure of the rosin. The cured product has higher ultraviolet resistance; and by adjusting the using amount of raw materials, superbranched polyester for ultraviolet-curable coatings meeting different coating requirements can be prepared.

Description

technical field [0001] The invention relates to UV coatings, in particular to a UV curable modified epoxy acrylate, and in particular to a preparation method of UV curable polyisocyanate modified hyperbranched epoxy acrylate. Background technique [0002] UV-curable coatings are a new type of coating developed in the 1960s. In the 1970s, with the formulation of international regulations on energy, ecology and environmental protection, the development of such coatings was further promoted. This kind of coating uses high-energy ultraviolet light as the curing energy source. The photoinitiator in the coating absorbs the ultraviolet light energy to form free radicals, triggers the photosensitive resin and reactive diluent molecules, and then undergoes a chain polymerization reaction to cure the coating film. [0003] The oligomers of UV-curable coatings are usually composed of linear molecular chains. As the relative molecular weight increases, the viscosity will increase signif...

Claims

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Application Information

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IPC IPC(8): C07D407/12C09D4/02
Inventor 谢晖王挺黄莉田松金爱红钱婷
Owner 江苏金隆新材料有限公司
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