Method for toughening epoxy resin by adopting modified wollastonite

A technology of tough epoxy resin and wollastonite, which is applied in the field of modified wollastonite toughened epoxy resin, can solve problems such as uneven dispersion, limitation of wollastonite application, and decline in mechanical properties of products, so as to increase added value and facilitate Effects of Handling, Tensile Strength and Impact Strength Improvement

Inactive Publication Date: 2012-07-04
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, wollastonite and organic polymers also have compatibility problems. When blending, they are unevenly dispersed in the polymer, resulting in a decrease in the mechanical properties of the product, which limits the application of wollastonite in polymers.

Method used

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  • Method for toughening epoxy resin by adopting modified wollastonite
  • Method for toughening epoxy resin by adopting modified wollastonite
  • Method for toughening epoxy resin by adopting modified wollastonite

Examples

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Embodiment 1

[0033] Modified wollastonite toughened epoxy resin

[0034] 1. Hydrolyze the silane coupling agent KH-570 in a mixed solution of absolute ethanol and deionized water (the volume ratio of ethanol and water is 1:4), add it to a 50 round bottom flask, and add a certain amount of silicon gray stone. The flask was placed in water at 80°C, and reacted under electromagnetic stirring for 3 hours. After the reaction, the mixture was suction-filtered, and the sediment was dried in a vacuum oven at 120°C for 12 hours. Grind the dry modified wollastonite in a planetary ball mill for 2 hours to obtain wet-process modified wollastonite.

[0035] 2. The modified wollastonite is mixed with epoxy resin and ground for 3 hours by a three-roller grinder to obtain a masterbatch with a certain solid content. The mass ratio of oxygen resin is 2:3.

[0036] 3. Mix epoxy resin, curing agent, and modified wollastonite masterbatch evenly, add initiator, release agent, and defoamer to mix, and react a...

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Abstract

The invention relates to a method for toughening epoxy resin by adopting modified wollastonite. The method is characterized by comprising the following steps: stirring the wollastonite for 30 minutes at the temperature of 80 DEG C so as to improve reaction activity; carrying out wet modification on the wollastonite with a silane coupling agent KH-570; and then toughening the epoxy resin by utilizing the modified wollastonite, wherein the tensile strength and the impact strength of the modified epoxy resin are greatly improved. According to the invention, the wollastonite is subjected to surface treatment and then the epoxy resin is subjected to toughening modification with the modified wollastonite, thus the process is simple and convenient for operation, thereby reaching the toughening purpose, reducing production cost and sufficiently utilizing the wollastonite so as to improve the additional value of the wollastonite.

Description

【Technical field】 [0001] The invention relates to the technical field of epoxy resin, in particular to a method for modifying wollastonite to toughen epoxy resin. 【Background technique】 [0002] Epoxy resin is a widely used matrix resin. The cured product has excellent heat resistance, chemical corrosion resistance, aging resistance, good electrical properties, high mechanical strength and good adhesion to the substrate. It is a thermosetting One of the varieties with the largest amount of resin, but there are also cured products with high brittleness, poor toughness, and insufficient fatigue resistance, which are difficult to meet industrial needs, so it needs to be toughened and modified. At present, there are many methods for toughening epoxy resins, including rubber-like elastomers, thermoplastic resins, thermotropic liquid crystals, interpenetrating polymer networks, flexible curing agents, and nanoparticle-toughened epoxy resins. In the past period of time, rubber ela...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/28C09C3/12C09C3/04C08L63/00C08K9/06C08K3/34C08J3/22
Inventor 林珩王锡麟易红玲郑柏存公维光魏婷
Owner EAST CHINA UNIV OF SCI & TECH
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