Aerogel polyvinyl chloride material and preparation method thereof
An aerogel polyvinyl chloride and polyvinyl chloride resin technology, applied in the field of materials, can solve the problems of poor cold resistance and impact resistance, PVC pipe decomposition, and PVC pipe becoming brittle, etc. The effect of thermal insulation
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[0020] The present invention provides an airgel foam material and its preparation method and application. In order to make the purpose, technical solution and effect of the present invention clearer and clearer, the present invention will be further described in detail below.
[0021] Airgel is a very porous material with the highest porosity of any known solid. The airgel powder of the present invention is representative silica airgel, and the airgel powder has a porous structure, and the inner space of the airgel powder is mostly empty, so that the airgel powder exhibits Attractive properties such as super heat insulation, light weight, sound absorption, low dielectric constant, and the like. The biggest advantage of airgel powder is super heat insulation. Compared with traditional foam materials and their analogs, airgel shows a lower thermal conductivity of less than 0.030W / m·K. According to reports, the thermal conductivity of silica airgel is smaller than that of produc...
Embodiment 1
[0024] A kind of preparation method of airgel polyvinyl chloride material:
[0025] 1) 80 parts of polyvinyl chloride resin, 3 parts of airgel powder, 20 parts of calcium carbonate, 0.5 parts of polyethylene wax, 5 parts of ethylene-propylene rubber, 0.5 parts of paraffin wax, 0.4 parts of stearic acid and 4 parts of calcium-zinc composite stabilizer Parts are added to the heat mixer, premixed and dried at 150°C;
[0026] 2) Cool the dried material to 40°C and send it into an extruder for extrusion molding.
[0027] The thermal conductivity of the airgel polyvinyl chloride material prepared in Example 1 is 0.130 W / m·K, the critical softening temperature is 90°C, and it becomes brittle at -20°C.
Embodiment 2
[0029] A kind of preparation method of airgel polyvinyl chloride material:
[0030] 1) Mix 90 parts of polyvinyl chloride resin, 5 parts of airgel powder, 30 parts of calcium carbonate, 1 part of polyethylene wax, 8 parts of ethylene-propylene rubber, 1 part of paraffin wax, 1 part of stearic acid and 5 parts of calcium-zinc composite stabilizer Parts are added to the heat mixer, pre-mixed and dried at a temperature of 170°C;
[0031] 2) Cool the dried material to 45°C and send it into an extruder for extrusion molding.
[0032] The thermal conductivity of the airgel polyvinyl chloride material prepared in Example 2 is 0.120 W / m·K, the critical softening temperature is 95°C, and it becomes brittle at -25°C.
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