Introduction of the most fire anhydride curing age

2022-10-04
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Introduction of anhydride curing agents

epoxy resin is a thermoplastic linear resin, which cannot be directly applied. It must be added to it to generate a three-dimensional complex structure to reflect its unique performance. Among the curing agent products, anhydride curing agent plays an important role. It is one of the most widely used curing agents in the market

epoxy resin and anhydride curing agents and other additives (such as accelerators, tougheners, fillers, coupling agents, pigments, etc.) are heated to form different forms of thermosetting adduct Chinese coatings through various processing processes. The curing agent of anhydride system is characterized by small shrinkage, no by-products, good heat resistance, good sealing, good insulation, and high selectivity of various additives. It can be used in the fields of electronic potting, sequential start-up display - Printer - Computer - Industrial Computer - start-up experimental software - power supply of hydraulic source, electrical casting, encapsulation, pultrusion, winding, laminated insulating materials and composites, powder coatings, etc

here are several supporting products of anhydride system sold by our company:

1mdi is mainly used to produce hard foam

methylhexahydrophthalic anhydride: hn-7000 (a), supplier: Hitachi chemical formation

appearance: colorless transparent liquid

hue (APhA):

viscosity (MPa. S):

characteristics: free acid less than 0.5%, weak current insulating materials, strong current insulating materials, automotive electrical components, electronic devices, structural materials

2

Methyltetrahydrophthalic anhydride: hn-2000nt, supplier: Hitachi chemical formation

appearance: light yellow transparent liquid

neutralization equivalent (g/eq):

hue (APhA): less than 2

viscosity (MPa. S):

characteristics: free acid less than 0.5%, insulating materials for weak current, insulating materials for strong current, automotive electrical components, electronic devices, structural materials

3

anhydride accelerator: dy-070, supplier: Huntsman

viscosity (mpa.s): 50

hue (g): 3

characteristics: heterocyclic amine, used to promote the reaction speed of anhydride curing agent

4

anhydride accelerator: dy-062, supplier: Huntsman

viscosity (mpa.s): CP

characteristics: BDMA, low viscosity

application field

1, electronic encapsulation

Electronic Encapsulation Products range from small electronic components, precision instruments, military communication products, and various electronic pouring products, large transformers, from motor coils to current transformers, cable junction boxes and cable terminals in high-voltage electrical appliances, Anhydride curing agents are widely used

2. Pultrusion products

during pultrusion molding, continuous glass fiber bundles, belts or cloth impregnated with resin glue will continuously produce FRP profiles of unlimited length under the action of traction. This process is suitable for the production of FRP profiles with various cross-section shapes, such as bars, tubes, I-shaped, grooved, square and open web profiles

in the production of pultrusion products, the curing agent of epoxy resin system generally adopts anhydride curing agent. Although unsaturated resin pultrusion processing is also used, its comprehensive performance, especially in mechanical properties, insulation properties, shrinkage, is not as good as epoxy resin pultrusion products

3. Laminated products

epoxy laminated products are made of fiber fabric reinforced materials impregnated with epoxy resin/curing agent, which are dried at a certain temperature to obtain semi cured sheets. The semi cured sheets are cut, laminated, and then hot pressed and cured into plates. After winding and heating, they are cured into pipes and barrels during the 2014 visit to Europe. In the epoxy resin system used for laminated products, anhydride curing agent is mainly used, dicyandiamide and aromatic amine are used as amine curing agent, and synthetic resin is also used as curing agent. Epoxy copper-clad laminate is the basic material of electronic industry. It is used to manufacture printed circuit boards and is widely used in electronic computers, communication equipment, instrument equipment, household appliances, etc

4. Winding products

winding products are products with a certain shape obtained by winding resin impregnated continuous fibers (cloth, pre impregnated yarn) onto the core mold according to a certain law, and then curing and demoulding. The most representative of winding products is the epoxy curing system with long service life, low viscosity, low calorific value and low toxicity, so liquid anhydride is generally used

5. Molded plastic products

molded plastic is mainly used to encapsulate small electronic components such as transistors, integrated circuits, capacitors, resistors, etc. Its advantages are convenient operation, high production efficiency, and more fillers can be used. The curing agent used by the utility model includes both anhydride curing agent and amine curing agent

6. Vacuum pressure impregnated products

in the production of vacuum pressure impregnated products, the glass cloth is first wound on the mandrel and installed into the mold, then the epoxy adhesive is sucked into the mold cavity under vacuum, and then the pipe can be obtained by gel curing under a certain pressure and temperature

the production process mainly uses liquid anhydride curing agent

7. Epoxy resin coating

epoxy resin mainly uses its excellent adhesion and excellent chemical resistance in the coating process. It is widely used in corrosion prevention, electrical insulation, transportation, civil construction and other fields. The application of anhydride curing agents in epoxy resin coatings mainly includes drop impregnation paint, powder mica tape adhesion and non-ferrous industry. Many anti-dumping lawsuits against aluminum materials have also occurred, such as insulating paint, powder coating, etc

among anhydride curing agents, liquid anhydride is the most widely used in the market because of its convenient operation process and ultra-high cost performance

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