Preparation method of heat-resistant PVC (polyvinyl chloride) pipe
A PVC pipe and PVC resin technology, applied in the field of PVC pipe preparation, can solve the problems of low heat resistance and deformation of PVC pipes, and achieve the effects of stable production process, improved stability, and excellent mechanical properties
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Embodiment 1
[0017] A preparation method for a heat-resistant PVC pipe, comprising the following steps:
[0018] (1) Mix PVC resin and tetrabutylammonium fluoride at a mass ratio of 15:1, heat to 68°C until tetrabutylammonium fluoride is completely melted, mix and stir evenly, and cool to room temperature to prepare Obtain modified PVC resin;
[0019] (2) In parts by weight, 22 parts of polybenzimidazole fiber, 18 parts of polytetrafluoroethylene resin, and 20 parts of acetaldehyde ammonium trimer were mixed and stirred and heated. When the temperature rose to 80 ° C, the Add 4 parts of aluminum borate and 8 parts of zirconia, continue heat preservation and mixing for 15 minutes, and then cool to room temperature to obtain a heat-resistant agent;
[0020] (3) In parts by weight, 94 parts of modified PVC resin, 4 parts of calcium-zinc stabilizer, 11 parts of heat-resistant agent, and 6 parts of calcium carbonate were added to the extruder, extruded, cooled and shaped to obtain finished pr...
Embodiment 2
[0026] A preparation method for a heat-resistant PVC pipe, comprising the following steps:
[0027] (1) Mix PVC resin and tetrabutylammonium fluoride at a mass ratio of 18:1, heat to 70°C until tetrabutylammonium fluoride is completely melted, mix and stir evenly, and cool to room temperature to prepare Obtain modified PVC resin;
[0028] (2) In parts by weight, mix and stir 24 parts of polybenzimidazole fiber, 21 parts of polytetrafluoroethylene resin, and 23 parts of acetaldehyde ammonia trimer, and heat them. When the temperature rises to 80 ° C, add Add 5 parts of aluminum borate and 10 parts of zirconia, continue heat preservation and mixing for 18 minutes, and then cool to room temperature to obtain a heat-resistant agent;
[0029] (3) In parts by weight, 96 parts of modified PVC resin, 5 parts of calcium-zinc stabilizer, 13 parts of heat-resistant agent, and 7 parts of calcium carbonate were added to the extruder, extruded, cooled and shaped to obtain finished product...
Embodiment 3
[0035] A preparation method for a heat-resistant PVC pipe, comprising the following steps:
[0036] (1) Mix PVC resin and tetrabutylammonium fluoride at a mass ratio of 20:1, heat to 72°C until tetrabutylammonium fluoride is completely melted, mix and stir evenly, and cool to room temperature to prepare Obtain modified PVC resin;
[0037] (2) In parts by weight, 26 parts of polybenzimidazole fiber, 23 parts of polytetrafluoroethylene resin, and 25 parts of acetaldehyde ammonium trimer are mixed and stirred and heated. When the temperature rises to 80 ° C, add Add 7 parts of aluminum borate and 11 parts of zirconia, continue heat preservation and mixing for 20 minutes, and cool to room temperature to obtain a heat-resistant agent;
[0038] (3) In parts by weight, 98 parts of modified PVC resin, 7 parts of calcium-zinc stabilizer, 15 parts of heat-resistant agent, and 9 parts of calcium carbonate are added to the extruder, and after extrusion molding, cooling and setting, the o...
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