What is AB glue? Introduction to the classification, characteristics and use of AB glue

What is AB glue? Introduction to the classification, characteristics and use of AB glue

What is AB glue

AB glue is another name for two-liquid mixed hardening glue. One liquid is the glue and the other is the hardener. The two liquids can be hardened when they are mixed. It does not need to be hardened by temperature, so it is a kind of room temperature hardening glue.

AB glue is a two-component adhesive with high transparency. After curing, the adhesive is perfect without traces, without heating, can be cured at room temperature, environmentally friendly and non-toxic; high bonding strength, good toughness, oil resistance, water resistance and many other advantages; cured product It has good electrical and physical properties such as good insulation, compression resistance and low shrinkage.

Classification and characteristics of AB glue

The types of AB glue can be distinguished according to the raw materials used, which can be divided into silicone AB glue, polyurethane AB glue, acrylic AB glue, epoxy resin AB glue, etc. The main functions are bonding, sealing, potting, etc., different types There is a big difference in the performance of the AB glue, and the applicable process is also very different.

Silicone AB glue: The main raw material is silicone rubber, which can conduct heat and has good insulation and sealing effect. It is mainly used for potting. Such as potting of LED modules, potting of LED lamps, potting of electronic parts, etc. The material of silicone AB glue is soft after curing. There are two forms of solid silicone rubber product and silicone gel, which can eliminate most of the mechanical stress and play a shock absorption protection effect. Physical and chemical properties are stable, with good high and low temperature resistance, and can work for a long time in the range of -50~200 °C. Excellent weather resistance, can still play a good protective role outdoors for more than 20 years, and is not easy to yellow. The mixing ratio is not fixed, there are 10:1, 2:1, 1:1, etc.

Polyurethane AB glue: The main raw material is polyurethane, which is mainly used for potting, coating, etc. Due to its advantages of adjustable performance and wide application range, it has become a product with many varieties and large output in polyurethane glue.

Acrylic AB glue: The main raw material is acrylate, mostly in a 1:1 mixing ratio, room temperature curing, fast curing, most acrylic AB glue positioning time is 3-5 minutes, hard and tough after curing, impact resistance and shock resistance Excellent dynamic performance. The main function is bonding, and it has good bonding strength to metal, hard plastic, wood, stone, ceramics, etc. Note: This type of AB glue is not good for copper, electroplated cadmium materials, PP, PE and Teflon, and has a strong smell.

Epoxy resin AB glue: The main raw material is epoxy resin, most of which are colorless and transparent, room temperature curing, high hardness, toughness is not as good as acrylic AB glue, but the hardness is higher than it. The materials that can be bonded are also very wide. The epoxy resin AB glue that the acrylic AB glue can stick can also be bonded, and the initial curing time of the epoxy resin AB glue is more detailed, and the operation time is relatively long, which can be suitable for more bonding process. However, the viscosity of epoxy resin AB glue is greatly affected by temperature, so there is no easy control of acrylate AB glue in the process. In addition to good bonding performance, epoxy resin AB glue can also be used for potting, especially for the potting of electronic parts with high confidentiality requirements, epoxy resin AB glue is used.

How to use AB glue

  1. First of all, the surface of the object to be bonded must be clean, smooth and dry. If necessary, treat the surface according to the actual situation, such as polishing or using a treatment agent.
  2. Mix components A and B according to a certain proportion and stir evenly, and apply them to the surface of the adherend.
  3. Please wear isolation gloves when operating. In case of contact with skin or eyes, rinse immediately with water or seek medical attention.
  4. The products after bonding should be processed according to the requirements of bonding, so as not to affect the effect.
  5. If the AB glue is thick, it is a normal phenomenon and does not affect the bonding effect.
  6. When using in batches, please do a test first. Avoid affecting the bonding effect due to improper operation.

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