Preparation and application of thermal conductive wide temperature range damping coating

Abstract

The invention provides preparation and application of a thermal conductive wide temperature range damping coating. The thermal conductive wide temperature range damping coating is prepared from the following components in parts by mass: 75-125 parts of a main material and 14-39 parts of additive; the main material is prepared from the following components in parts by mass: 30-50 parts of acrylic emulsion, 35-55 parts of filler, 10-20 parts of thermal conducting filler and 10-25 parts of deionized water; the additive is prepared from the following components in parts by mass: 1-5 parts of dispersant, 1-3 parts of anti-sedimentation agent, 0.2-1 part of defoamer, 0.1-1.5 parts of thickener, 0.5-1.8 parts of film forming agent and 0.06-0.2 part of preservative. According to the preparation and the application, the acrylic emulsions with a core-shell structure and an IPN structure are adopted, the structures can enable a polymer to have a micro-phase separation structure after film formation, and the problem of mutual separation of damping peaks due to phase separation easily caused by blending of traditional polymers is overcame; and in addition, various polymerized emulsions are blended and are in gradient Tg distribution, so that a damping temperature range can be widened to the greatest extent, the prepared damping coating is wide in damping temperature range, can be suitable for variation of air temperature and reaches a wide temperature range from 20 DEG C to 100 DEG C.

Description

technical field [0001] The invention belongs to the field of damping coatings, and relates to the preparation and application of a novel damping coating with thermal conductivity in a wide temperature range. Background technique [0002] Damping coatings, also known as vibration-reducing and noise-reducing coatings, are special functional coatings composed of specific functional polymer materials and fillers that can effectively suppress vibration and noise. This type of coating uses the viscoelasticity of polymers to convert part of the energy generated by external field effects such as mechanical vibration and acoustic vibration into heat energy and dissipate it through the internal friction generated by the movement of molecular segments, so as to achieve the purpose of vibration reduction and noise reduction. Water-based damping coatings are prepared with water-based emulsion as the base, water as the dispersion medium, and one or more fillers and additives. [0003] At...

AI Technical Summary

Problems solved by technology

[0005] At present, the research on water-based damping coatings mainly focuses on its thermal insulation performance, but there are relatively few researches on real heat-dissipating water-based damping coatings. Only patent CN201410523281.9 prepares a thermally conductive damping coating by adding alumina particles and aluminum fibers. However, alumina belongs to spherical particles. It is generally believed that lamellar structure fillers can have a good damping effect. Therefore, although adding granular alumina makes it thermally conductive, it will also reduce its damping effect.

At the same time, the damping temperature range of the damping coating has a certain range. Generally speaking, the current damping coating has a better effect between 20°C and 60°C, but the damping and vibration reduction effect is relatively poor after this temperature range, or even loses damping. Vibration reduction effect, and the temperature difference across the country is relatively large, and the temperature difference between winter and summer is also relatively large, and when the damping coating acts on the motor casing, the motor itself will generate heat due to the rotation of the motor, which will increase the temperature of the motor, so the temperature of the motor will increase. This also requires that the damping coating must have a wider damping temperature range

Therefore, due to the poor thermal conductivity and narrow damping temperature range, the traditional damping coating can no longer meet the requirements of the current mechanical equipment such as motors.