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Low-cost high-toughness self-lubricating epoxy resin and preparation method thereof

An epoxy resin and high-toughness technology, applied in the field of advanced polymer material science, can solve the problems of unsuitability for large-scale promotion of production and cumbersome preparation steps, and achieve the effects of easy industrial production, simple preparation process, and strong bearing capacity

Inactive Publication Date: 2019-01-25
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current methods for preparing hyperbranched polymers generally have cumbersome preparation steps, use a large amount of solvents and catalysts, and are not suitable for large-scale commercial production.

Method used

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  • Low-cost high-toughness self-lubricating epoxy resin and preparation method thereof
  • Low-cost high-toughness self-lubricating epoxy resin and preparation method thereof
  • Low-cost high-toughness self-lubricating epoxy resin and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Mix 10 parts of multifunctional epoxy monomer, 90 parts of bisphenol A epoxy resin, and 25 parts of 4,4'-diaminodiphenyl sulfone, stir at 120°C for 1 hour until it melts, and prepare the resin pre- Polymer. Then, add 3 parts of hyperbranched polysiloxane into the above prepolymer at 120°C, stir for 15 minutes, pour it into a heated mold, and vacuumize to remove air bubbles in a vacuum box at 120-130°C. Blast drying oven for staged temperature rise curing, the curing process is 150 ° C / 2 h + 170 ° C / 2 h, then natural cooling, after demoulding, and then post-treatment at 230 ° C for 2 h.

Embodiment 2

[0032] Mix 20 parts of multifunctional epoxy monomer, 80 parts of bisphenol A epoxy resin, and 30 parts of 4,4'-diaminodiphenylmethane, stir at 130°C for 1 hour until it melts, and prepare the resin pre- Polymer. Then, add 3 parts of hyperbranched polysiloxane to the above prepolymer at 130°C, stir for 10 minutes, pour into a heated mold, vacuumize to remove air bubbles in a vacuum box at 130°C, and put it into the air blast Drying oven for staged heating and curing, the curing process is 150°C / 2 h+170°C / 2h, then naturally cooled, after demoulding, and post-treatment at 230°C for 2 hours.

Embodiment 3

[0034] Mix 30 parts of multifunctional epoxy monomer, 70 parts of bisphenol A epoxy resin, and 35 parts of 4,4'-diaminodiphenyl sulfone, stir at 110°C for 2 hours until it melts, and prepare the resin pre- Polymer. Then, add 3 parts of hyperbranched polysiloxane to the above prepolymer at 110°C, stir for 30 minutes, pour it into a heated mold, vacuumize in a vacuum box at 130°C to remove air bubbles, and put it into the air blast Drying oven for staged heating and curing, the curing process is 150°C / 2 h+170°C / 2h, then naturally cooled, after demoulding, and post-treatment at 230°C for 2 hours.

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Abstract

The invention relates to a low-cost high-toughness self-lubricating epoxy resin and a preparation method thereof, wherein the low-cost high-toughness self-lubricating epoxy resin comprises, by mass, 3-15 parts of epoxy-based hyper-branched polysiloxane, 10-40 parts of polyfunctional epoxy resin, 60-90 parts of a bisphenol A type epoxy resin, and 25-40 parts of an amine-based curing agent. According to the present invention, the low-cost high-toughness self-lubricating epoxy resin has characteristics of low friction coefficient, strong bearing capacity, good toughness and the like, can be usedas the resin matrix of electronic packaging materials, wear-resistant coatings, structural composite materials and the like in the fields of aerospace, electronic machinery, nuclear industry and the like, and can be widely used, wherein the casting body of the low-cost high-toughness self-lubricating epoxy resin has an impact strength of more than 33.0 KJ / m<2>, a bending strength of more than 150MPa, a friction coefficient of less than 0.25, and a glass transition temperature of more than 220 DEG C.

Description

technical field [0001] The invention belongs to the scientific and technical field of advanced polymer materials, and relates to a low-cost, high-toughness self-lubricating epoxy resin and a preparation method thereof. Background technique [0002] Epoxy resin is a general-purpose thermosetting resin with excellent adhesive properties, chemical stability, and molding processability. It has a large number of applications in aerospace, electronics industry, automobile manufacturing and other fields. However, when applied to the high-tech field, the cured epoxy resin has problems such as high brittleness, insufficient toughness, and a large friction coefficient, which need to be modified. [0003] At present, the modification of epoxy resin mainly includes rubber modification, thermoplastic resin modification, liquid crystal polymer modification and core-shell polymer modification. Rubber toughened epoxy resin, on the one hand, utilizes the phase separation of rubber particles...

Claims

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Application Information

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IPC IPC(8): C08L63/02C08L87/00C08G59/38
CPCC08G59/38C08L63/00C08L87/00
Inventor 颜红侠姚欢欢施勇鹏郭留龙丁凡
Owner NORTHWESTERN POLYTECHNICAL UNIV
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