Normal temperature heat conducting and high temperature insulation porcelainized high molecular material and preparation method of material

Abstract

The invention discloses a normal temperature heat conducting and high temperature insulation porcelainized high molecular material which comprises 100 parts of base gum, 20-30 parts of reinforcing agents, 10-30 parts of halogen-free flame retardants, 20-40 parts of porcelain sintering additives, 1-4 parts of heat conducting functional fillers, 4-16 parts of high temperature insulation fillers, 0.01-10 parts of platinum complexes or platinum compounds (calculated in terms of platinum, 1-5 parts of structured control agents and 1.5 parts of crosslinking agents. The invention further discloses apreparation method of the material. The preparation method includes the steps of base gum mixing, milling, discharging and vulcanizing. The highest heat conducting coefficient of the normal temperature heat conducting and high temperature insulation porcelainized high molecular material reaches 0.4W / (m*K) and is far higher than that of a common porcelainized high molecular composite material by 0.2W / (m*K), the heat conducting coefficient of the high temperature porcelainized material is reduced to be 0.08W / (m*K), and the material has the unique advantages of normal temperature heat conductingand high temperature insulation porcelainized properties by unique combination and matching of the heat conducting functional fillers, the high temperature insulation fillers and the porcelain sintering additives, and can be widely applied to cable production.

Description

technical field [0001] The invention relates to a porcelainizable polymer material and a preparation method thereof, in particular to a normal temperature heat conduction-high temperature heat insulation porcelainizable polymer material and a preparation method thereof. Background technique [0002] Porcelainable polymer material is a new type of thermal protection material that has polymer properties at room temperature and can be transformed into a self-supporting ceramic material at high temperature. In many industrial fields such as energy, chemical industry and metallurgy, the application prospect of porcelainable polymers is broad. For example: in the field of power transmission, the wire core itself has resistance when transmitting electric energy. The greater the current, the more heat the wire core generates, and the temperature rise of the wire core will increase its own resistance, further expanding the power transmission process. The loss due to the temperature ...

AI Technical Summary

Problems solved by technology

[0005] Due to the poor compatibility between the thermally conductive filler and the silicone rubber matrix, the amount added has a great influence on the mechanical properties of the composite material

When the amount of thermally conductive filler added is large, the thermal conductivity is better, but in order to ensure the overall performance of the silicone rubber composite material, only the amount of high temperature resistant filler can be controlled, so it is difficult to ensure the simultaneous realization of the two functions of low temperature heat conduction and high temperature heat insulation , so that the current invention can only be aimed at one of the two functions of heat conduction or fire resistance and heat insulation

For example: the invention patent CN201510354977 provides a high thermal conductivity polyvinyl chloride sheath material for cables containing graphene. The thermal conductivity of the prepared material reaches above 0.3 W / (m K), but the flame retardancy needs to be improved, and Does not have fire resistance

Invention patent CN201510634469 introduces a heat-conducting and flame-retardant control cable, which has good thermal conductivity and excellent flame retardancy, but also does not have fire resistance

Patent CN204516432U provides a fire-resistant cable with light texture, good fire resistance and good thermal stability, but its low thermal conductivity is not conducive to large current transmission

Patent CN 106566097A discloses a modified ammonium polyphosphate low-smoke halogen-free flame-retardant cable material. The cable material is environmentally friendly and flame-retardant, low-smoke and halogen-free, but the fire resistance and thermal conductivity still need to be improved

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