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Preparation method of high-impact-resistant waterproof type epoxy resin toughening agent

An epoxy resin and high impact resistance technology, which is applied in the field of toughening agent preparation, can solve the problems of insufficient internal structure, poor impact strength and water resistance of epoxy resin, achieve good polymerization effect and improve impact strength Effect

Inactive Publication Date: 2018-06-29
常州市万昌化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention: Aiming at the defect that the internal structure of the current common toughening agent is not strong enough, resulting in poor impact strength and water resistance of the toughened epoxy resin, a high impact and water-resistant epoxy resin is provided. The preparation method of resin toughening agent

Method used

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  • Preparation method of high-impact-resistant waterproof type epoxy resin toughening agent

Examples

Experimental program
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Effect test

example 1

[0024] Weigh 20g of nano-silica with a particle size of 10nm and 5g of silane coupling agent KH-560 and mix and stir for 6 minutes. After stirring, add 24mL of deionized water and 10mL of absolute ethanol and mix them in an ultrasonic stirrer. After continuing to stir for 20min, Adjust the pH to 3 with 0.1 mol / L hydrochloric acid, pour it into a four-neck flask equipped with a stirrer, an addition funnel, a condenser tube and a thermometer after adjustment, and place it in a water bath. After stirring for 12 minutes under the protection of r / min and nitrogen, filter to obtain the filter residue, wash the filter residue with absolute ethanol, put it in an oven at 60°C and dry it for 1 hour to obtain modified nano-silica, and set aside, the volume ratio is 10 : 1:1 Mix butyl acrylate, 1,4-butanediol diacrylate and allyl methacrylate and stir for 10 minutes to obtain a mixed solution. Take 20 mL of the mixed solution and add it to a In the reactor of sodium phenylsulfonate and 0....

example 2

[0026] Weigh 25g of nano-silica with a particle size of 15nm and 6g of silane coupling agent KH-560 and mix and stir for 7 minutes. After stirring, add 27mL of deionized water and 11mL of absolute ethanol and mix them in an ultrasonic stirrer. After continuing to stir for 25min, Adjust the pH to 3 with 0.1 mol / L hydrochloric acid, pour it into a four-necked flask equipped with a stirrer, an addition funnel, a condenser tube and a thermometer after adjustment, and place it in a water bath. After stirring for 14 minutes under the protection of r / min and nitrogen, filter to obtain the filter residue, wash the filter residue with absolute ethanol, put it in an oven at 70°C and dry it for 1.5h to obtain modified nano-silica, which is set aside, and the volume ratio is Mix and stir butyl acrylate, 1,4-butanediol diacrylate and allyl methacrylate at 10:1:1 for 11 minutes to obtain a mixed solution. Take 30 mL of the mixed solution and add it to a mixture with 160 mL of distilled water...

example 3

[0028]Weigh 30g of nano-silica with a particle size of 20nm and 7g of silane coupling agent KH-560, mix and stir for 8 minutes, add 30mL of deionized water and 12mL of absolute ethanol after stirring, mix them in an ultrasonic stirrer, and continue stirring for 30 minutes , adjust the pH to 4 with 0.1mol / L hydrochloric acid, pour it into a four-neck flask equipped with a stirrer, an addition funnel, a condenser tube and a thermometer after adjustment, and place it in a water bath. After stirring at 400 r / min and under the protection of nitrogen for 16 minutes, filter to obtain the filter residue. After cleaning the filter residue with absolute ethanol, put it in an oven at 80°C and dry it for 2 hours to obtain modified nano-silica. Mix butyl acrylate, 1,4-butanediol diacrylate and allyl methacrylate at 10:1:1 and stir for 12 minutes to obtain a mixed solution. Take 40 mL of the mixed solution and add it to a mixture with 180 mL of distilled water and 0.7 g of In the reactor of...

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Abstract

The invention discloses a preparation method of a high-impact-resistant waterproof type epoxy resin toughening agent, and belongs to the technical field of preparation of toughening agents. The methoddisclosed by the invention is characterized in that butyl acrylate, 1,4-butanediol diacrylate, allyl methacrylate, distilled water, sodium dodecyl benzene sulfonate and potassium persulfate are subjected to heating reaction to prepare a home-made seed emulsion, and the home-made seed emulsion is mixed with butyl acrylate, methyl methacrylate, a cross-linking agent, an emulsifying agent, an initiating agent and a grafting agent together to prepare a core layer emulsion and a shell layer emulsion; divinyl benzene is an oil-soluble initiating agent and mainly swells in emulsion particles, and only a small amount of divinyl benzene is dissolved in a water phase, thereby improving the impact-resistance strength of the toughening agent; and nano silicon dioxide is added to a polyacrylate emulsion with better water resistance and physical and mechanical properties to enable the polymer to have high water absorbing capacity, and resin can be cured in a humid environment or even underwater andcan keep good water resistance, thereby improving the water resistance of the toughening agent.

Description

technical field [0001] The invention discloses a preparation method of a high-impact and water-resistant epoxy resin toughening agent, which belongs to the technical field of toughening agent preparation. Background technique [0002] Tougheners refer to substances that can increase the flexibility of the adhesive film. Some thermosetting resin adhesives, such as epoxy resin, phenolic resin and unsaturated polyester resin adhesive, have low elongation and high brittleness after curing. When the bonding part is subjected to external force, it is easy to generate cracks and expand rapidly. , leading to cracking of the adhesive layer, not fatigue resistant, and cannot be used for structural bonding. Therefore, we must try to reduce brittleness, increase toughness, and improve bearing strength. Any substance that can reduce brittleness and increase toughness without affecting other main properties of the adhesive is a toughening agent. Tougheners generally contain active grou...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F292/00C08F220/18C08F220/14C08F222/14C08F212/36C08F220/44C08F220/40C08K9/06C08K3/36C08L63/00C08L51/10
CPCC08F292/00C08K2201/003C08K2201/011C08L63/00C08L2205/03C08L2207/53C08L51/10C08K9/06C08K3/36C08F220/1804
Inventor 雷春艳杨立军陈莉莉
Owner 常州市万昌化工有限公司
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