3W High thermal conductivity, low thickening: a new generation of polyurethane adhesive thermal conductive powder

Polyurethane adhesive plays an important role in industry and daily life because of its wide application and excellent performance. They can be used to bond a variety of materials, including metal, rubber, plastic, fabric, leather, rubber and plastic materials, wood, ceramics and glass. The advantages of polyurethane adhesives include strong adhesion, adjustable hardness and elongation, good process performance, curing stability and excellent impact resistance, vibration resistance and fatigue resistance. In addition, polyurethane adhesives can maintain high bond strength at extremely low temperatures, and can be used even at -196 ° C (liquid nitrogen temperature) and -253 ° C (liquid hydrogen temperature).
However, polyurethane adhesives also have some disadvantages, such as poor heat resistance, easy hydrolysis in high temperature and humidity environments, some components are toxic, poor resistance to strong acids and alkalis, water sensitivity, and relatively low metal bonding strength.
In the application of polyurethane adhesive, they are widely used in automotive, wood, footwear, packaging, construction, ink, book binding and other fields. With the advancement of technology and the enhancement of environmental awareness, the polyurethane adhesive industry is developing in the direction of more environmental protection, safer and resource recycling.

In addition, polyurethane adhesive faces challenges in the development of water-based polyurethane flame retardants, such as the amount of additive flame retardants, poor effect, poor stability, poor dispersion and so on. The future development trend is to develop high-efficiency halogen-free flame retardants with low additive amount, as well as the use of green inorganic nano flame retardants.
In order to solve the problem of preparing polyurethane thermal conductive adhesive, Dongchao-New Material developed a modified thermal conductive powder product which can be used in isocyanate and polyol components at the same time. These products not only have good compatibility, easy to disperse uniform, but also maintain high bonding strength and storage stability, suitable for the preparation of high thermal conductivity (3.0W/m·K) polyurethane adhesive.
Product application field
This product is suitable for the preparation of flame retardant polyurethane adhesive with thermal conductivity in the range of 2.5 to 3.0 W/m·K. According to the specific base adhesive viscosity and processing requirements, the corresponding adjustment can be made.
Product overview
This product through the use of unique powder surface treatment agent and advanced modification technology, the powder surface grafting treatment, thereby significantly improving the compatibility of powder and resin. This treatment method allows different particles to be piled up efficiently, not only reducing the density of the system, but also having little effect on the bonding properties of the resin. Therefore, the composite material has good bonding properties while maintaining high thermal conductivity.

Product characteristics
1. The surface treated powder has a low oil absorption value, good filling performance, and a small thickening effect on the base rubber. Therefore, the structural adhesive with these powders as fillers has low viscosity and good fluidity.
2. The particle size distribution of the powder is reasonable, and it is easy to form an efficient thermal conductivity network in the base glue, so as to achieve excellent thermal conductivity.
3. The powder is an inorganic material with low impurity content, so it has excellent insulation performance.