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Epoxy acrylate and preparation method thereof

An epoxy acrylate and carbonate-based technology, which is applied in the field of epoxy acrylate and its preparation, can solve the problems of tensile strength, tensile modulus reduction, low glass transition temperature, poor tensile strength, etc., and achieve reduction The effect of adding amount, high purity, and improving service life

Active Publication Date: 2020-01-17
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The viscosity, glass transition temperature, tensile strength, and tensile modulus of the obtained resin are all reduced, and the bending performance is improved. However, due to the soft polyether structure of the obtained coating film, the hardness of the coating film is low, the glass transition temperature is low, and the tensile strength is low. Difference

Method used

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  • Epoxy acrylate and preparation method thereof
  • Epoxy acrylate and preparation method thereof
  • Epoxy acrylate and preparation method thereof

Examples

Experimental program
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Effect test

preparation example Construction

[0038] The preparation method of embodiment 1 chain extender A1

[0039] Weigh 0.1 mol of mercaptosuccinic acid into a 250ML single-necked flask, dissolve mercaptosuccinic acid with 60 g of acetone, stir ultrasonically until it is completely dissolved, then add 0.1 mol of lauryl acrylate (LA), and add 0.2 mol after it is completely dissolved. mol triethylamine as catalyst and acid binding agent. The reaction was stirred at room temperature for 6h. The acetone solvent was spun off. Dissolve the reacted substance in a sufficient amount of deionized water, add sufficient amount of hydrochloric acid to acidify to adjust the pHfigure 1 , proving that the chain extender A1 was successfully synthesized.

[0040] The reaction formula is as follows:

[0041]

Embodiment 2

[0042] The synthesis of embodiment 2 epoxy acrylate B1

[0043] Add the raw materials into a 100ml three-necked flask according to the ratio in Table 1 and put it into an oil bath for heating reaction. The three-necked flask is respectively inserted into a thermometer, a stirring paddle and a dropping funnel. The reaction temperature is 100°C-120°C. After heating and stirring for four hours, measure the acid value of the system, and stop the reaction when the acid value drops to less than 1mg KOH / g. The synthetic product is epoxy acrylate B1.

[0044] The structural formula of epoxy acrylate B1 is as follows:

[0045]

[0046] The viscosity and molecular weight of the modified epoxy acrylate B1 were tested, and the test results are shown in Table 2, indicating that the synthesized resin has a low molecular weight and low viscosity.

[0047] Table 1

[0048] substance quality Chain extender A1 7.65g acrylic acid 2.86g Bisphenol A epoxy resin ...

Embodiment 3

[0058] The application of embodiment 3 epoxy acrylate B1

[0059] Epoxy acrylate B1 and acrylate reactive diluent HDDA (1,6-hexanediol diacrylate), TPDGA (tripropylene glycol diacrylate) or DPGDA (dipropylene glycol diacrylate), 1173 photoinitiator as follows Table 3 Proportions formulated into paint formulations. The film is coated with a scraper, and then irradiated and cured under a 365nm ultraviolet lamp.

[0060] table 3

[0061] substance mass percentage Modified epoxy acrylate 78％ Reactive diluent HDDA 20％ 1173 photoinitiator (2-hydroxy-methylphenylpropan-1-one) 2％

[0062]Use GB T 6739-1996 (coating film hardness pencil test method), GB / T 9286 (Baiger test standard), GB / T1732-93 (paint film impact resistance test method) and ISO 1519 (coating film cylindrical bending test) respectively Carry out pencil hardness, 100 grid test, impact test, bending test, the results are shown in Table 4. This shows that the modified epoxy acrylate s...

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Abstract

The invention provides epoxy acrylate with a structure of a general formula 1 shown in the description. The epoxy acrylate has a low viscosity and is capable of effectively reducing the addition amount of a reactive diluent when being used as a coating, the cost can be reduced, and in addition, the side chain of the epoxy acrylate can be grafted with various structures, and thus on the basis thata main body resin is not changed, other properties of the resin can be adjusted, for example, the water resistance can be improved after long chain alkane or benzene is grafted, the adhesion to a metal substrate can be improved after phosphate or isoborneol ester structures are grafted, the hardness and the like can be improved after a benzene ring is grafted, the viscosity of the resin can be reduced after vinyl ether or long chain alkane structures are grafted, and the epoxy acrylate has the effects of being convenient to apply and capable of prolonging the service life of a coating when being applied to coatings.

Description

technical field [0001] The invention relates to an epoxy acrylate and a preparation method thereof, belonging to the technical field of resin synthesis. Background technique [0002] Light-curing coating is a kind of high-efficiency, economical, environmentally friendly and green coating that uses an initiator to initiate unsaturated double bond polymerization to form a film under the irradiation of ultraviolet light. Can be applied on plastic, paper, wood and other substrates. Resins such as bisphenol A epoxy acrylate are widely used in photocurable coatings due to their fast curing rate and high hardness of the cured coating film. The internal stress of the substrate is large, which leads to poor adhesion of the coating film, and the cured coating film is hard and brittle, which is not suitable for substrates such as metals. Thus limiting its scope of application. [0003] Epoxy acrylate is a prepolymer that uses acrylic acid to block epoxy resin and uses the double bon...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G59/14C08G59/17
CPCC08G59/1466C08G59/1483
Inventor 刘仁罗静孙凯强
Owner JIANGNAN UNIV