Shrinkproof heat radiation polyurethane sealant

Abstract

The invention discloses shrinkproof heat radiation polyurethane sealant, which is prepared from polyurethane resin, a flatting agent, a crosslinking agent, a lubricating agent, a surface control agent, a defoaming agent and a coupling agent, wherein the flatting agent is polyether modified silicon oil; the cross linking agent is hydroxyethyl acrylate; the lubricating agent is butyl stearate; the surface control agent is polyethylene wax; the defoaming agent is benzyl carbinol oleate; the coupling agent is vinyltriethoxysilane. The product is prepared by using six kinds of additives; the prepared product has the advantages of small inner and outer tension, shrinkproof performance, stable quality, low foam, good stain-resistant performance and good anti-scratching and wear-resistant performance. The shrinkproof heat radiation polyurethane sealant also comprises the following ingredients of a mixture of sodium bicarbonate particles and carbon powder; the particle diameter of the mixture is smaller than 0.1mm. When the sealant is just filled into a position to be sealed, hot air blown out through a air blower heats the sealant to be 50 DEG C or higher; the heating is stopped after the continuous heating for 30S. The invention provides the novel sealant with the good heat radiation function.

Description

technical field [0001] The invention relates to a sealing material, in particular to a shrink-proof and heat-dissipating polyurethane sealant. Background technique [0002] Polyurethane resin is widely used as a main sealing material raw material. However, due to the problem of large internal stress in the production and processing of polyurethane itself, the internal and external quality of the product cannot be guaranteed, and due to the impact of foaming in the production process, it will Potholes are caused to the product, causing the rubber to shrink, which in turn damages the surface of the product and is easy to be scratched, causing the accumulation of stolen goods. [0003] At the same time, the existing sealant is mainly used in electronic components, and electronic components are often in a high-temperature working state. When the heat dissipation performance of the sealant is not good, it will cause the electronic components to fail or be damaged due to local ove...

AI Technical Summary

Problems solved by technology

[0002] Polyurethane resin is widely used as a main sealing material raw material. However, due to the large internal stress in the production and processing of polyurethane itself, the internal and external quality of the product cannot be guaranteed, and due to the impact of foaming in the production process, it will Potholes are caused to the product, causing the rubber to shrink, which in turn damages the surface of the product and is easy to be scratched, causing the accumulation of stolen goods

[0003] At the same time, the existing sealant is mainly used in electronic components, and electronic components are often in a high-temperature working state. When the heat dissipation performance of the sealant is not good, it will cause the electronic components to fail or be damaged due to local overheating. However, the sealant in the prior art often only plays the role of sealing and fixing, not only can not conduct heat well, but also is more unfavorable for heat dissipation because of its heat insulation; therefore, how to improve the existing sealant to achieve the ideal Heat dissipation performance is a technical problem that needs to be solved urgently in this field