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Heat-resistant PVC plastic and preparation method thereof

A PVC resin and plastic technology, applied in the field of PVC plastics, can solve the problems of PVC plastic discoloration, easy deformation, and restrictions on the application of PVC plastics

Inactive Publication Date: 2021-02-05
广州凯杰环保新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Polyvinyl chloride is called PVC for short. Due to its wide source of raw materials and low price, it has a wide range of application markets. Although PVC has good comprehensive performance, it also has some defects in the process of production and application. The molding of industrial PVC plastics is in It is carried out in the molten state. Normally, the processing temperature of PVC plastic is 170-210°C, but PVC plastic will undergo de-HCl reaction when the temperature is higher than 100°C. When the temperature is higher than 140°C, it will decompose. The speed of producing HCl is accelerated sharply, and the color of PVC plastic will change. Therefore, relevant stabilizers need to be added during the heating process to ensure the smooth progress of the thermoforming process. In addition, the Vicat softening point temperature of general rigid PVC plastic is below 90 ° C. When the temperature exceeds 90°C, PVC plastic is easy to soften and deform under external stress, which limits the application of PVC plastic

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A heat-resistant PVC plastic, comprising the following raw materials in parts by weight:

[0035] 100 parts of PVC resin, 8 parts of zinc stearate, 8 parts of calcium stearate, 3 parts of heat stabilizer, 0.3 parts of benzotriazole, 1 part of dibutyl phthalate, 0.6 parts of dioctyl phthalate part and 0.6 part of isopropyl tris (dioctyl pyrophosphate acyloxy) titanate;

[0036] This PVC plastic is prepared through the following steps:

[0037] The first step, taking raw materials according to parts by weight;

[0038] The second step, PVC resin, zinc stearate, calcium stearate and heat stabilizer are added in the blender and mixed, the mixing speed is 60r / min, the stirring time is 3min, then add benzotriazole and continue to stir for 5min, then Add dibutyl phthalate, dioctyl phthalate and isopropyl tris(dioctyl pyrophosphate acyloxy) titanate and continue stirring for 5 minutes to obtain a mixture;

[0039] The third step is to extrude the mixture in a twin-screw extr...

Embodiment 2

[0051] A heat-resistant PVC plastic, comprising the following raw materials in parts by weight:

[0052] 110 parts of PVC resin, 9 parts of zinc stearate, 9 parts of calcium stearate, 4 parts of heat stabilizer, 0.4 parts of benzotriazole, 2 parts of dibutyl phthalate, 0.8 parts of dioctyl phthalate part and 0.8 part of isopropyl tris (dioctyl pyrophosphate acyloxy) titanate;

[0053] This PVC plastic is prepared through the following steps:

[0054] The first step, taking raw materials according to parts by weight;

[0055] The second step, PVC resin, zinc stearate, calcium stearate and heat stabilizer are added in the blender and mixed, the mixing speed is 65r / min, the stirring time is 4min, then add benzotriazole and continue to stir for 10min, then Add dibutyl phthalate, dioctyl phthalate and isopropyl tris(dioctyl pyrophosphate acyloxy) titanate and continue stirring for 10 minutes to obtain a mixture;

[0056] The third step is to extrude the mixture in a twin-screw e...

Embodiment 3

[0068] A heat-resistant PVC plastic, comprising the following raw materials in parts by weight:

[0069] 120 parts of PVC resin, 10 parts of zinc stearate, 10 parts of calcium stearate, 5 parts of heat stabilizer, 0.5 parts of benzotriazole, 3 parts of dibutyl phthalate, 1 part of dioctyl phthalate 1 part and 1 part of isopropyl tris (dioctyl pyrophosphate acyloxy) titanate;

[0070] This PVC plastic is prepared through the following steps:

[0071] The first step, taking raw materials according to parts by weight;

[0072] The second step, PVC resin, zinc stearate, calcium stearate and heat stabilizer are added in the blender and mixed, the mixing speed is 70r / min, the stirring time is 5min, then add benzotriazole and continue to stir for 15min, then Add dibutyl phthalate, dioctyl phthalate and isopropyl tri(dioctyl pyrophosphate acyloxy) titanate and continue stirring for 15 minutes to obtain a mixture;

[0073] The third step is to extrude the mixture in a twin-screw ext...

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PUM

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Abstract

The invention discloses heat-resistant PVC plastic and a preparation method thereof. The heat-resistant PVC plastic is prepared from the following raw materials in parts by weight: 100-120 parts of PVC resin, 8-10 parts of zinc stearate, 8-10 parts of calcium stearate, 3-5 parts of a heat stabilizer, 0.3-0.5 parts of benzotriazole, 1-3 parts of dibutyl phthalate, 0.6-1 part of dioctyl phthalate and 0.6-1 part of isopropyl tri (dioctyl pyrophosphate) titanate. The preparation method comprises the following steps of: firstly, weighing the raw materials in parts by weight; secondly, adding PVC resin, zinc stearate, calcium stearate and a heat stabilizer into a mixing stirrer for mixing, adding benzotriazole, continuing to stir for 5-15 minutes, adding dibutyl phthalate, dioctyl phthalate andisopropyl tri (dioctyl pyrophosphate) titanate, and continuing to stir to obtain a mixture; and thirdly, extruding the mixture in a twin-screw extruder to obtain the heat-resistant PVC plastic.

Description

technical field [0001] The invention belongs to the technical field of PVC plastics, and in particular relates to a heat-resistant PVC plastic and a preparation method thereof. Background technique [0002] Polyvinyl chloride is called PVC for short. Due to its wide source of raw materials and low price, it has a wide range of application markets. Although PVC has good comprehensive performance, it also has some defects in the process of production and application. The molding of industrial PVC plastics is in It is carried out in the molten state. Normally, the processing temperature of PVC plastic is 170-210°C, but PVC plastic will undergo de-HCl reaction when the temperature is higher than 100°C. When the temperature is higher than 140°C, it will decompose. The speed of producing HCl is accelerated sharply, and the color of PVC plastic will change. Therefore, relevant stabilizers need to be added during the heating process to ensure the smooth progress of the thermoforming...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/06C08K13/02C08K5/098C08K5/12C08K5/3475C08K5/5399
CPCC08K5/098C08K5/12C08K5/3475C08K5/5399C08K13/02C08K2201/014C08L2201/08C08L27/06
Inventor 容健辉
Owner 广州凯杰环保新材料科技有限公司