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A kind of UV curable polyester and its preparation method and application

A polyester and catalyst technology, which is applied in the field of fine chemical synthesis, can solve the problems of high price, complex process, and high cost, and achieve the effects of strong anti-corrosion performance, simple process, and excellent medium resistance

Active Publication Date: 2019-08-20
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese patent application CN105504245A first prepares carboxyl-containing polyester resin, and its esterification reaction temperature is 200 ° C, and then reacts with glycidyl acrylate or glycidyl methacrylate to prepare vinyl polyester resin, because glycidyl acrylate is used ,expensive
It is reported in the literature that the preparation of UV-curable polyester resin needs to be esterified at a higher temperature (above 180°C), and the process of introducing vinyl or acrylic monomer is complicated and the cost is high

Method used

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  • A kind of UV curable polyester and its preparation method and application
  • A kind of UV curable polyester and its preparation method and application
  • A kind of UV curable polyester and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A kind of UV curable polyester acrylate, the composition of raw material formula mass percentage is as table 1 (excluding catalyzer):

[0035] Table 1

[0036]

[0037] (2) the preparation technology of this UV curing polyester acrylate comprises the following steps:

[0038] Mix trimethylolpropane triglycidyl ether, acrylic acid, hydroquinone, and ethyl acetate uniformly in the reactor according to the given mass, and add catalyst tetraethylammonium bromide (0.7% of triglycidyl ether mass ) at 120°C until the acid value is lower than 10mgKOH / g; add phthalic anhydride, hydroquinone and p-toluenesulfonic acid to the matrix prepared in step 1), react at 105°C for 2h, then add epichlorohydrin, and Add tetraethylammonium bromide (2% of the mass fraction of the epoxy compound) and ethyl acetate to react at 110°C until the acid value is less than 10mgKOH / g, distill under reduced pressure to remove the solvent, cool down and discharge the material, and obtain a UV-curable ...

Embodiment 2

[0050] (1) A kind of UV curable polyester acrylate, the mass percentage composition of raw material formula is as shown in Table 4 (catalyst is not included):

[0051] Table 4

[0052]

[0053] (2) the preparation technology of this UV curing polyester acrylate comprises the following steps:

[0054] Mix trimethylolpropane triglycidyl ether, acrylic acid, tert-butylcatechol, and butyl acetate uniformly in the reaction kettle according to a given mass, and add catalyst tetrabutylammonium bromide (0.8% of the mass of triglycidyl ether) %) at 105°C until the acid value is lower than 10mgKOH / g; add hexahydroanhydride, hydroquinone and p-toluenesulfonic acid to the matrix prepared in step 1), react at 120°C for 2h, and add butyl glycidol Ether, and add catalyst p-toluenesulfonic acid and tetrabutylammonium bromide (3% of epoxy compound mass fraction) and butyl acetate to react at 120 ℃ until the acid value is less than 10mgKOH / g, cool down and discharge, and obtain UV curing P...

Embodiment 3

[0064] (1) A kind of UV curable polyester acrylate, the mass percentage composition of raw material formula is as shown in Table 7 (catalyst is not included):

[0065] Table 7

[0066]

[0067] (2) the preparation technology of this UV curing polyester acrylate comprises the following steps:

[0068] Mix trimethylolethane triglycidyl ether, itaconic acid, tert-butyl catechol, and propylene glycol methyl ether acetate according to a given mass and mix them uniformly in the reaction kettle, and add the catalyst hexadecyl ammonium bromide (trisharyl ammonium bromide) 1.0% of the glycerol ether mass) at 115°C until the acid value is lower than 10mgKOH / g; add succinic anhydride, tert-butylcatechol and p-toluenesulfonic acid to the matrix prepared in step 1), and react at 110°C for 3h , add butyl glycidyl ether, and add catalyst p-toluenesulfonic acid and tetrabutylammonium bromide (4% of epoxy compound mass fraction) and propylene glycol methyl ether acetate to react at 130 ℃ u...

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Abstract

The invention discloses UV (Ultraviolet) curable polyester as well as a preparation method and application of the UV curable polyester. The preparation method of the UV curable polyester comprises the following steps: 1) mixing 1 part of triglycidyl ether and 3 to 4 parts of an acrylic monomer into a reaction kettle according to a mole fraction; adding a quaternary ammonium salt catalyst, a polymerization inhibitor and an organic solvent and reacting at 105 DEG C to 125 DEG C until the acid value is less than 10mgKOH / g; 2) adding acid anhydride, a polymerization inhibitor and p-toluenesulfonic acid into a matrix prepared by the step 1), and reacting at 105 DEG C to 130 DEG C for 2h to 4h; adding an epoxy compound which is 0.9 to 1.2 times of the mole fraction of the acid anhydride and adding the quaternary ammonium salt catalyst and the organic solvent to react until the acid value is less than 10mgKOH / g; decompressing and distilling to remove the solvent, and cooling and discharging a material, wherein the solid content of the resin reaches 100 percent or more and the viscosity is 3000mPa.s to 30000mPa.s. UV curable paint prepared by the polyester has excellent coating film performance and relatively low cost.

Description

technical field [0001] The invention relates to a polyester resin, in particular to a UV-curable polyester and its preparation method and application, belonging to the field of fine chemical synthesis. Background technique [0002] The development trend of coatings is to develop environmentally friendly coatings, including high solids coatings, water-based coatings, powder coatings and UV curing coatings. UV curing coatings have the advantages of fast curing speed, energy saving, and excellent coating performance. Commonly used light-curing coatings include epoxy acrylate, polyurethane acrylate, polyester acrylate and polyacrylate. Among them, the coating prepared by epoxy acrylate has high viscosity, high brittleness and poor flexibility; polyurethane acrylate is expensive; The acrylate process is complicated; in the preparation process of polyester acrylate, it is first necessary to perform esterification reaction at 180-240°C to prepare hydroxyl polyester resin, and then...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C67/26C07C69/80C09D4/02
Inventor 瞿金清刘晚秋张凯旋
Owner SOUTH CHINA UNIV OF TECH
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