A kind of nano rubber epoxy resin toughening agent and preparation method thereof
A technology of epoxy resin and nano-rubber, which is applied in the field of toughening agent with epoxy resin as the carrier, can solve the problems of heat distortion temperature drop, high viscosity and brittleness of modified epoxy resin, and achieve high temperature resistance and insulation Reduce, increase impact strength, moderate viscosity effect
Inactive Publication Date: 2017-11-28
李发凯 +4
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Problems solved by technology
With the deepening of application, the shortcomings of general epoxy resin are also exposed, such as: (1) high brittleness; (2) low peel strength; (3) poor heat resistance; (4) easy to degrade at high temperature
[0003] In order to overcome the above-mentioned shortcomings of general-purpose epoxy resins and expand its application fields, various methods of research and application have been done on the toughening of epoxy resins at home and abroad, such as: using liquid rubber to toughen general-purpose epoxy resins. The size of the rubber particles is uneven during the phase, but it will lead to unstable toughening effect of the epoxy resin and a decrease in the heat deflection temperature; the improved type of Jindao Qishi toughener can improve the impact strength of the epoxy resin, but the heat deflection temperature drops less Large; nano-inorganic particle toughened epoxy resin, the compatibility of the two is not good, and most of them are still in the experimental research stage; Sinopec Beijing Research Institute of Chemical Industry ultra-fine fully vulcanized powder rubber (patent number: CN00109220.0) can improve environmental protection The impact strength of epoxy resin can be improved, and the heat distortion temperature can not be lowered at the same time, but the addition process is cumbersome, the relative addition amount is small, and the viscosity of modified epoxy resin is relatively high
Method used
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[0017] According to the above design scheme, two types of toughening agent products, EPR1 and EPR2, are now prepared, and the formulas of the examples are shown in Table 1.
[0018] Table 1 Hydantoin type epoxy resin toughening agent embodiment formula
[0019]
[0020] Nano-rubber epoxy resin toughening agent is processed according to the following six-step process:
[0021] Step 1. Pre-dispersion: Put the nano-rubber soft aggregates in a dispersion container, add FL-1 composite lubricating dispersant, stir with a high-speed mixer at a speed of 4000r / min for 15 minutes, and keep the temperature at 25°C~45°C ;
[0022] Step 2, fine dispersion: transfer the material obtained in step 1 into a high-speed colloid mill, grind it once, and keep the temperature at 25°C~45°C;
[0023] Step 3, soaking coating: transfer the material obtained in step 2 into a dispersion container, add antioxidant, coupling agent, add 1 / 3 part of epoxy resin, stir with a high-speed mixer, the speed i...
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Abstract
A nano-rubber epoxy resin toughening agent aims at modifying diphenol-based propane type epoxy resin, improving its impact strength, keeping the thermal deformation temperature of the original resin not lowered, and the comprehensive performance of the original resin not declining, and at the same time, it is easy to add. . Its ingredients are: nano-rubber, FL‑1 composite lubricating and dispersing agent, coupling agent, antioxidant, defoamer, epoxy resin, using high-energy mechanical method, through: pre-dispersion, fine dispersion, infiltration coating, auxiliary dispersion , fine dispersion, ultrasonic treatment and other processes. The toughening agent has moderate viscosity and is easy to add to general-purpose epoxy resins.
Description
technical field [0001] The invention relates to a nano-rubber epoxy resin toughening agent and a preparation method thereof, in particular to a toughening agent with one or more nano-rubber particles as a core functional component and an epoxy resin as a carrier, and a preparation method thereof. Background technique [0002] Diphenol-propane type epoxy resin belongs to the general-purpose epoxy resin. It is the largest and most widely used variety in epoxy resin. The chemical name is diphenol-propane glycidyl ether. Its structure is characterized by two or more More than two epoxy groups, this feature enables it to be cross-linked with various types of curing agents to form an insoluble and infusible three-dimensional network structure polymer. It has been widely used in coatings, adhesives, casting materials, molding compounds, fiber-reinforced plastics, etc. The products involve electrical and electronics, automobile manufacturing, aerospace, shipbuilding, military indust...
Claims
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IPC IPC(8): C08L63/02C08L9/02C08L13/00C08L9/06
Inventor 徐唱李发凯范忠庆黎铖
Owner 李发凯