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Epoxy resin and preparation method thereof

A technology of epoxy resin and polymer, applied in the direction of adhesive type, polyether adhesive, coating, etc., can solve the problems of epoxy resin process difficulties, poor solubility, large usage, etc., and avoid solvent recovery Difficulty, low cost, effect of improving solubility

Inactive Publication Date: 2013-04-10
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the methods of using thermoplastic resin to toughen are all through physical blending or chemical blending to achieve the purpose of toughening. At the same time, because the amount of thermoplastic resin used in this type of method is generally relatively large, and the solubility is poor, a large amount of high-boiling point solvents are required. To increase the solubility, such as dimethyl formamide, dimethyl sulfoxide, etc., so thermoplastic resin toughened epoxy resin has certain difficulties in the process, which increases the cost

Method used

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  • Epoxy resin and preparation method thereof
  • Epoxy resin and preparation method thereof
  • Epoxy resin and preparation method thereof

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preparation example Construction

[0043] The present invention also provides a preparation method of epoxy resin, comprising: a) mixing hydroquinone represented by formula V, formula VI or formula VII with 4,4'-difluorobenzophenone, alkali metal carbon The acid salt is mixed in an organic solvent, and a polymerization reaction is carried out to obtain a polymer; b) the polymer obtained in step a) is mixed with acetic anhydride and hydrogen peroxide, heated, stirred and oxidatively added to obtain the epoxy resin shown in formula I; wherein R is a repeating unit represented by formula II, formula III or formula IV, R 1 , R 2 respectively methyl or hydrogen, n=1~20;

[0044]

[0045] Formula V Formula VI Formula VII.

[0046] The hydroquinone described in formula V, VI, VIII of the present invention is prepared by the following method, and the preparation method of the hydroquinone shown in formula V is:

[0047]

[0048] Combining cyclopentadiene with R 1 and / or R 2 The p-benzoquinone is mixed with D...

Embodiment 1

[0060]

[0061] Formula 1

[0062] The epoxy resin represented by formula 1 wherein n is 20 was prepared.

[0063] Equipped with stirring device, thermometer, water separator, condenser tube and N 2 Add hydroquinone shown in formula V in the reaction bottle of gas protection device, wherein R 1 , R 2 All hydrogen 17.4g, 0.1mol, 4,4-difluorobenzophenone 21.8g, 0.1mol, potassium carbonate 27.6g, 0.2mol, 150mL DMF and toluene 70mL. Stir, heat, and reflux the water with toluene at 120°C for 3.5h, release the toluene and the generated water in the water separator, slowly raise the temperature to 160°C, polymerize for 1.5h, pour the product into water, suction filter, and use Washed three times with deionized water and dried in a vacuum oven for 24 hours to obtain a polymer.

[0064] Take 10g of the obtained polymer and dissolve it in 50mL DMF, add 50mL acetic anhydride and 70% hydrogen peroxide, stir at 80°C for 6h, pour into ice water after cooling, filter with suction, was...

Embodiment 2

[0069]

[0070] Formula 2

[0071] An epoxy resin represented by formula 2, where n=2, was prepared.

[0072] Equipped with stirring device, thermometer, water separator, condenser tube and N 2 Add hydroquinone 25.2g, 0.1mol, R 1 is methyl, R 2 Both are hydrogen, 21.8g, 0.1mol of 4,4-difluorobenzophenone, potassium carbonate (27.6g, 0.2mol), 150mL of DMF and 70mL of toluene. Stir, heat, and reflux with toluene at 120°C to carry water for 3.5 hours, release toluene and generated water in the water separator, slowly raise the temperature to 160°C, polymerize for 2 hours, pour the product into water, filter with deionization Washed with water three times, dried in a vacuum oven for 24 hours to obtain a polymer.

[0073] Dissolve 10 g of the obtained polymer in 50 mL of DMF, add 50 mL of acetic anhydride and 70% hydrogen peroxide, stir at 80°C for 6 h, pour into ice water after cooling, filter with suction, wash with deionized water and dry in vacuum for 12 h to obtain a co...

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Abstract

The invention provides an epoxy resin, the structural formula of which is shown in formula I, wherein n equals to 1 to 20, R is a repeating unit shown by formula II, formula III or formula IV, R1 and R2 are respectively methyl or hydrogen; the epoxy resin provided by the invention does not need other blended toughening materials, a functional group with good heat resistance and friction resistance and an epoxide group form the epoxy resin, and the epoxy resin has good toughness. The invention also provides a preparation method of the epoxy resin shown by formula I, which does not need to use a great amount of solvents with a high boiling point, reduces the cost, and avoids inconvenient in aftertreatment caused by use of solvents with a high boiling point.

Description

technical field [0001] The invention relates to the field of polymer preparation, in particular to an epoxy resin and a preparation method thereof. Background technique [0002] Epoxy resins (EP) are an important class of thermosetting resins and are widely used matrix resins in polymer composites. EP has the advantages of excellent adhesion, wear resistance, mechanical properties, electrical insulation, chemical stability, low shrinkage, easy processing and low cost, etc. It is used in adhesives, electronic instruments, light industry, construction, It has been widely used in the fields of machinery, aerospace, coatings, electrical and electronic insulation materials and composite materials. However, due to the high cross-linking structure of pure epoxy resin, it has shortcomings such as brittleness, fatigue resistance, heat resistance, and poor impact toughness, which is difficult to meet the requirements of engineering technology, and its application is limited to a cert...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G65/48C08G65/40C07D303/31C09D171/10C09J171/10
Inventor 郑春柏柳美华刘宾元郑晓伟尹园邓鹏飏陈敬强
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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