Epoxy curing agents have excellent mechanical properties, electrical properties, and chemical resistance properties, and thus have been widely used. The curing agent is one of the raw materials necessary for curing the epoxy resin, otherwise the epoxy resin will not cure. In order to meet the requirements of various applications, the appropriate curing agent should be used. The following small series introduces epoxy curing agent types and epoxy curing agent applications.
What is epoxy resin
Epoxy resin refers to an organic high-molecular compound containing two or more epoxy groups in the molecule, except for a few, their relative molecular mass is not high. The molecular structure of epoxy resin is characterized by the presence of active epoxy groups in the molecular chain. The epoxy group can be located at the end, in the middle or in a ring structure of the molecular chain. Due to the presence of reactive epoxy groups in the molecular structure, they can be cross-linked with various types of curing agents to form insoluble, infusible polymers having a three-dimensional network structure.
Epoxy curing agent type
1. Latent epoxy curing agent
The range of the use of epoxy curing agent is different, so it leads to different epoxy curing agent according to the requirements of various fields. If the epoxy curing agent is used incorrectly, the epoxy will not Curing. First of all, Xiaobian introduced to everyone the latent epoxy curing agent. This latent epoxy resin curing agent is relatively stable under normal conditions. Only when its temperature rises at a certain height does it show its activity and thus cure with an epoxy resin. This latent epoxy resin curing agent has dicyandiamide, which exhibits this latent property. The characteristics of the curing agent, it is relatively stable at room temperature, will not produce a solid, when the temperature is 145-165 °, it will produce curing in 30 minutes.
2, apparent epoxy curing agent
Next, we will introduce a new type of epoxy curing agent, which is the most commonly used curing agent for epoxy resins. Please pay attention when using this type of epoxy curing agent. The use of energy should be appropriate. When the curing dose of this epoxy resin is relatively low, the fixed product will be connected to the non-reactive epoxy group. If the energy is too high, it will cause the curing speed to be extremely fast and will not reach Expected results. The epoxy curing agent belonging to this apparent type is adipic acid dihydrazide, which does not dissolve in the epoxy resin at room temperature, and will only cure when dissolved in a high-temperature environment.
3, catalytic epoxy curing agent
Finally, we will introduce catalytic epoxy resin curing agents and added curing agents. First of all, catalytic epoxy resin curing agents can be initiated by the epoxy resin we use. When we open the epoxy machine, we can implement catalytic epoxy resin and combine them into a network structure. To put it another way, a curing agent that adds an epoxy resin, also known as a melon-type curing agent, can undergo an addition reaction with an epoxy group.
Epoxy curing agent application
1. Coatings: automotive chassis primers, component paints, tanker interior paints, food cans, outer wall paints, equipment, pipe anti-corrosion coatings;
2. Composite materials: FRP shells, FRP flooring, FRP oxygen bottles, FRP tanks, relays, high voltage switches, insulators, transformers, impeders;
3ã€Adhesives: Fast-curing tough epoxy resin adhesive at room temperature, conductive adhesive, room temperature curing electrostatic flocking adhesive, optical structural adhesive, shuffleboard rubber, chemical anchoring adhesive, high functionalization of silk, and artificial Flower, magnetic writing board, auto repair glue, stone glue and so on.
Editor's summary: The types of epoxy curing agents and epoxy curing agent applications are introduced here, and we hope to help everyone. If you want to know more related information, you can pay attention to this website information.
Epoxy floor
Coated Fiberglass Geogrid: Ultimate tensile Strengths from 30kN/m to 400kN/m,Fiberglass Geogrid range: Biaxial, flexible high modulus Fiberglass geogrid impregnated with bitumen using the knitting process.
1. It reinforce old asphalt concrete road surface and asphalt layer, and prevents damage ;
2. It is used for rebuilding cement concrete road surface into composite road surface and restraining reflection caused by block contraction .
3. It is used in road expansion and improvment project and crack caused by old and new combination position and uneven sedimentation ;
4. It is used in soft soil base reinforcement treatment , is favorable for soft soil water separation and concretion,restrains sedimentation effectivly,distributes stress uniformly and improve overall strength of road base;
5. It is sued for preventing contraction crack caused by new road semi-rigid base layer,and reinforces and prevents road surface crack caused by foundation crack reflection.
Fiberglass Geogrid
Fiberglass Geogrid, Glass Fiber, Composite Glass Grid
Feicheng Lianyi Engineering Plastics Co., Ltd , https://www.lianyigeosynthetics.com