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Low-temperature-brittleness-resistant PVC composite material and processing method thereof

A composite material, low temperature resistant technology, applied in the field of plastic composite materials, can solve problems such as increasing cost, achieve the effect of low cost, improve comprehensive performance, and solve poor plasticity

Inactive Publication Date: 2021-07-13
程伟
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the addition of functional additives can improve the application performance of PVC to a certain extent, it will also increase the cost, so how to optimize the use effect of PVC on the basis of cost control is particularly important

Method used

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  • Low-temperature-brittleness-resistant PVC composite material and processing method thereof
  • Low-temperature-brittleness-resistant PVC composite material and processing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The preparation of styrene-isopropenyloxytrimethylsilane copolymer: add 30g styrene, 20g isopropenyloxytrimethylsilane and 0.5g dicumyl peroxide to butyl acetate, under nitrogen protection Heating to 110° C. for 10 h, the reaction was completed, centrifugally filtered, and dried to obtain a styrene-isopropenyloxytrimethylsilane copolymer.

[0026] Processing of PVC composite materials: 80 parts of PVC resin powder, 22 parts of dioctyl phthalate, 22 parts of styrene-isopropenyl oxytrimethylsilane copolymer, 15 parts of sepiolite fiber and 3 parts of bismuth Add dibutyltin laurate into the double-roll mill, heat up to 170°C and mix for 15 minutes, then transfer to the mold for molding, the molding temperature is 150°C, the molding pressure is 8MPa, naturally cool to room temperature, demould, and the thickness is obtained 2.5mm PVC composite material.

Embodiment 2

[0028] The preparation of styrene-isopropenyloxytrimethylsilane copolymer: add 35g styrene, 25g isopropenyloxytrimethylsilane and 0.5g dicumyl peroxide to ethyl propionate, under nitrogen atmosphere Under protection, heat to 110° C. for 12 hours. After the reaction is completed, centrifugally filter and dry to obtain a styrene-isopropenyloxytrimethylsilane copolymer.

[0029] Processing of PVC composite materials: 90 parts of PVC resin powder, 25 parts of epoxidized soybean oil, 20 parts of styrene-isopropenyloxytrimethylsilane copolymer, 18 parts of sepiolite fiber and 3 parts of dilauric acid di Add butyl tin to the double-roll mill, raise the temperature to 170°C and mix for 15 minutes, then move to the mold for molding, the molding temperature is 150°C, the molding pressure is 8MPa, naturally cool to room temperature, demould, and the thickness of 2.5mm is obtained. PVC composite.

Embodiment 3

[0031] The preparation of styrene-isopropenyloxytrimethylsilane copolymer: add 35g styrene, 25g isopropenyloxytrimethylsilane and 0.5g dicumyl peroxide to ethyl propionate, under nitrogen atmosphere Under protection, heat to 110° C. for 12 hours. After the reaction is completed, centrifugally filter and dry to obtain a styrene-isopropenyloxytrimethylsilane copolymer.

[0032] Processing of PVC composite materials: 90 parts of PVC resin powder, 25 parts of epoxidized soybean oil, 20 parts of styrene-isopropenyl oxytrimethylsilane copolymer, 18 parts of sepiolite fiber and 3 parts of calcium zinc heat stabilized Add agent CZ915 to the double-roll mill, raise the temperature to 170°C and mix for 15 minutes, then transfer to the mold for compression molding, the molding temperature is 150°C, the molding pressure is 8MPa, naturally cool to room temperature, demold, and the thickness is 2.5mm PVC composite material.

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Abstract

The invention discloses a low-temperature-brittleness-resistant PVC composite material and a processing method thereof, and relates to the technical field of plastic composite materials, the low-temperature-brittleness-resistant PVC composite material is prepared from the following raw materials by weight: 60-100 parts of PVC resin powder, 15-40 parts of a plasticizer, 10-30 parts of a low-temperature-brittleness-resistant agent, 10-30 parts of a filler, and 1-5 parts of a heat stabilizer. The plasticizer, the low-temperature brittleness-resistant agent, the filler and the heat stabilizer are utilized to perform functional modification on the PVC resin, the adopted physical modification mode has the characteristics of simplicity and convenience in operation and lower cost, the problems of poor plasticity, poor heat stability and high embrittlement tendency at low temperature existing in the existing PVC can be well solved, and the comprehensive performance of the PVC composite material is improved, therefore, the application range is widened.

Description

Technical field: [0001] The invention relates to the technical field of plastic composite materials, in particular to a PVC composite material resistant to low temperature brittleness and a processing method thereof. Background technique: [0002] Polyvinyl chloride (PVC) is an extremely important class of plastic products. It has the characteristics of wide source and low price, and can be processed by molding, extrusion, injection molding and other methods. However, the toughness of PVC is poor, and it is easy to be brittle when impacted, and the brittleness is greatly affected by temperature. The lower limit of the service temperature of general PVC products is -15°C, and the lower limit of use temperature of soft PVC products is -30°C. In addition, the thermal stability of PVC is poor, it starts to decompose HCl at 100°C, and decomposes rapidly when it is higher than 150°C. In order to solve the limitations of the above-mentioned defects on the application range of PVC,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/06C08L25/08C08K13/04C08K7/10C08K5/12C08K5/57C08L91/00C08K5/00C08K5/10C08K5/098
CPCC08L27/06C08L2205/03C08L2201/08
Inventor 程伟
Owner 程伟