Silicon rubber with temperature self-control performance

Abstract

The invention aims at providing temperature self-control silicon rubber which is used for solving the problem that the existing temperature self-control material is improved polyethylene and conductive particles are difficult to uniformly fill due to polymerization-adhesion trend of conductive particles under a base molten state. During a processing and using process of the product, the polymerization-adhesion trend can continue, so that the function attenuation of the product is accelerated; and the product is short in service life and poor in safety due to heat insulation or spontaneous combustion. The highest temperature maintaining range of the product is narrow due to the limit of the characteristics of the base material. The technical key point of the invention is that the silicon rubber comprises the following components in parts by weight: 100 parts of raw silicon rubber, 30-60 parts of reinforcing agent, 6-35 parts of conductive medium, 5.5-16 parts of constitution controller and 0.5-2 parts of vulcanizing agent organic oxide. The silicon rubber with the temperature self-control performance has the positive effect that the highest temperature maintaining range ranges from a certain DEG C to 200 DEC or higher. The silicon rubber with the temperature self-control performance can be used within a wider environment temperature range. Moreover, an open circuit due to sparse conductive particles is avoided and a short circuit due to gathering of conductive particles is also avoided, so that the self rubber with the temperature self-control performance is high in safety, longer in service life and strong in practicability.

Description

technical field [0001] The invention relates to a silicone rubber, in particular to a silicone rubber with self-limiting temperature performance. Background technique [0002] At present, the polymer self-limiting temperature material is a polymer compound using thermoplastic polymer as a raw material. During the heating process, its internal resistance will have a positive temperature coefficient change, and it has a special molecular memory ability, and this memory response is strong. When the ambient temperature rises, the micromolecules of the polymer polymer expand, and the conductive particles gradually separate, causing the circuit to be interrupted, the resistance rises, and the output power of the system automatically decreases; when the ambient temperature decreases, the distance between the polymer particles shrinks and becomes smaller , the conductive particles are connected accordingly to form a circuit, and the heating power of the system rises automatically; ...

AI Technical Summary

Problems solved by technology

[0004] Conductive particles with a large specific surface area are filled in the high-temperature molten state of polyethylene material, and the conductive particles tend to agglomerate in the molten state of the matrix, making it difficult to achieve uniform filling

Not only that, during the processing and use of the product, this aggregation tendency will continue, resulting in accelerated decay of the product function, or thermal break or spontaneous combustion, and eventually lose the product function in a short period of time