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Modified epoxy acrylic resin and preparation method thereof

A technology of epoxy acrylic acid and epoxy resin, which is applied in the field of polymers and resins, can solve the problems of fracture and decomposition of cross-linked network structure, affect the service life of products, and high viscosity of finished adhesives, so as to facilitate large-scale production, improve Tg value, Effect of reducing curing shrinkage

Active Publication Date: 2020-02-28
广州日高新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the existing epoxy acrylic resin has high viscosity and the glass transition temperature (Tg) of its UV cured product is low (generally lower than 80°C). It is easy to generate bubbles, and the lower glass transition temperature will cause the cured cross-linked network structure to break and decompose when the ambient temperature is higher than Tg, resulting in yellowing, strength loss and other performance losses, which will affect the service life of the product, thus limiting Its application in long-term high-temperature environment

Method used

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  • Modified epoxy acrylic resin and preparation method thereof
  • Modified epoxy acrylic resin and preparation method thereof
  • Modified epoxy acrylic resin and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] (1) Preparation of modified cycloaliphatic epoxy resin

[0040] The modified cycloaliphatic epoxy resin of the present embodiment is prepared from following raw materials:

[0041] Diglycidyl 4,5-epoxycyclohexane-1,2-dicarboxylate 75%

[0042] Nadic Methyl Anhydride 24%

[0043] Accelerator (2-methylimidazole) 1%.

[0044] Its preparation method is as follows:

[0045] Add diglycidyl 4,5-epoxycyclohexane-1,2-dicarboxylate and accelerator into the reactor, stir and raise the temperature to 100±2°C, add methylnadic anhydride dropwise (with constant pressure drop funnel for dropwise addition), after 0.8h, the dropwise addition is completed (it is best to control the dropwise addition within 0.5-1.0h); The temperature is lowered to below 50°C, and the material is discharged to obtain the modified cycloaliphatic epoxy resin.

[0046] (2) Preparation of modified epoxy acrylic resin

[0047] Put 1.02mol of the modified cycloaliphatic epoxy resin prepared in step (1) (in ...

Embodiment 2

[0049] (1) Preparation of modified cycloaliphatic epoxy resin

[0050] The modified cycloaliphatic epoxy resin of the present embodiment is prepared from following raw materials:

[0051] 4-(2,3-epoxypropyloxy)-N,N-bis(2,3-epoxypropyl)aniline 75%

[0052] Nadic Methyl Anhydride 24%

[0053] Accelerator (1-cyanoethyl-2-phenylimidazole) 1%.

[0054] Its preparation method is with embodiment 1.

[0055] (2) Preparation of modified epoxy acrylic resin

[0056] Put 1.02mol of the modified cycloaliphatic epoxy resin prepared in step (1) (calculated as epoxy group) into the reactor, stir and heat up to 85±2°C, then add the catalyst (in this example, triphenylphosphine , consumption is 0.1% of modified cycloaliphatic epoxy resin and acrylic acid monomer gross weight), then dress acrylic monomer 0.96mol (methacrylic acid in the present embodiment) and polymerization inhibitor with constant pressure dropping funnel agent (in this embodiment, it is p-methoxyphenol, and the consumpti...

Embodiment 3

[0058] (1) Preparation of modified cycloaliphatic epoxy resin

[0059] The modified cycloaliphatic epoxy resin of the present embodiment is prepared from following raw materials:

[0060] 4-(2,3-epoxypropyloxy)-N,N-bis(2,3-epoxypropyl)aniline 71%

[0061] Nadic Methyl Anhydride 28%

[0062] Accelerator (2-methylimidazole) 1%.

[0063] Its preparation method is with embodiment 1.

[0064] (2) The preparation of modified epoxy acrylic resin is the same as in Example 1.

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Abstract

The invention relates to modified epoxy acrylic resin and a preparation method thereof. The modified epoxy acrylic resin is mainly prepared from modified cycloaliphatic epoxy resin, acrylic monomers,a catalyst and a polymerization inhibitor, wherein the modified cycloaliphatic epoxy resin is prepared from raw materials in percentage by weight as follows: 65%-85% of polyfunctional cycloaliphatic epoxy resin, 14%-34% of methyl nadic anhydride and 0.1%-3% of a promoter, wherein the mole ratio of epoxy groups to acrylic monomers in the modified cycloaliphatic epoxy resin is 1:(0.7-1.5). The modified epoxy acrylic resin has good heat resistance, can reduce curing shrinkage and has lower viscosity. With addition of the modified epoxy acrylic resin, the Tg value of a UV curing product can be greatly increased, and the modified epoxy acrylic resin has better market prospects.

Description

technical field [0001] The invention relates to the technical field of polymers and resins, in particular to a modified epoxy acrylic resin and a preparation method thereof. Background technique [0002] UV curable resin is a photosensitive resin with relatively low molecular weight, which has groups that can undergo photocuring reactions, such as various unsaturated double bonds or epoxy groups. Among the components of the final photocuring product, UV-curable resin is the main body of photocuring, and its performance basically determines the main properties of the cured material. important part of the design. [0003] Among the UV-curable resins, epoxy acrylic resin has the advantages of high hardness, good gloss, and strong toughness. Therefore, it is the most studied and most widely used UV-curable resin in the UV-curable industry. [0004] However, the existing epoxy acrylic resin has high viscosity and the glass transition temperature (Tg) of its UV cured product is ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G59/17C08G59/42
CPCC08G59/1466C08G59/4215
Inventor 李长莲
Owner 广州日高新材料科技有限公司
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