Heat-resisting and cold-resisting environment-friendly PVC (polyvinyl chloride) modified material and preparation method thereof

A modified material and PVC resin technology, applied in the field of heat-resistant, cold-resistant and environmentally friendly PVC modified materials and their preparation, can solve the problems of poor thermal stability, only reaching -30 °C, and high temperature resistance can only reach 105 °C, etc. Good flexibility and electrical insulation, improved heat and cold resistance, and excellent low temperature resistance

Active Publication Date: 2013-05-01
广东祺龙科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Polyvinyl chloride (PVC) is one of the earliest industrialized and widely used general-purpose thermoplastics. It has light weight, high strength, insulation, flame retardancy, corrosion resistance, It has the advantages of excellent comprehensive performance, low price and wide source of raw materials; but it also has the following disadvantages: 1. Poor toughness, easy to be brittle when impacted, so it cannot be used as a structural material. In addition, the brittleness of polyvinyl chloride is greatly affected by temperature. Large, the lower limit of general PVC products is -15°C, and the lower limit of soft PVC is -30°C; 2. Poor thermal stability, it begins to decompose HCl at 100°C, and decomposes more rapidly when it is higher than 150°C. The melting temperature of PVC is about 210°C; 3. The viscosity of PVC is extremely high and its fluidity is extremely poor, which limits its use to a certain extent.
[0006] The performance indicators of most of the existing PVC materials are only meeting the basic requirements of national standards. For many special environments such as environments where the difference between high and low temperature is too large, the performance of current PVC materials cannot reliably meet the long-term requirements of high temperature and low temperature conditions. According to the needs of use, the highest high temperature resistance can only reach 105°C, and the lowest low temperature resistance can only reach -30°C. The heat and cold resistance of PVC materials need to be further optimized and improved; in addition, the existing PVC sheathed cables and PVC plugs , PVC film and PVC pipes all have quite serious pollution, which will cause certain harm to human health. It is also particularly important to develop an environmentally friendly PVC modified material

Method used

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  • Heat-resisting and cold-resisting environment-friendly PVC (polyvinyl chloride) modified material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] Weigh raw material SG-5 PVC resin 80Kg, heavy calcium carbonate 7.5Kg, light calcium carbonate 7.5Kg, polyester plasticizer UN380 40Kg, antimony pentoxide 0.5Kg, calcium borate 0.5Kg, barium stearate 0.5 Kg, hydrotalcite 0.5Kg, chlorine content is 25% chlorinated polyethylene 3Kg, vinyl acetate unit content 5% ethylene-vinyl acetate copolymer 2Kg, paraffin 0.1Kg, pentaerythritol stearate 0.1Kg mix; The mixed raw materials were put into a high-speed blender and stirred at 100°C for 25 minutes; the stirred raw materials were extruded and granulated through a twin-screw extruder to obtain a heat-resistant and cold-resistant environmentally friendly PVC modified material; The screw temperature of the screw extruder is: the temperature of the first zone is 138°C, the temperature of the second zone is 135°C, the temperature of the third zone is 135°C, the temperature of the fourth zone is 132°C and the temperature of the fifth zone is 130°C. The mechanical and physical proper...

Embodiment 2

[0055] Weigh raw material SG-7 type PVC resin 90Kg, heavy calcium carbonate 10Kg, light calcium carbonate 10Kg, polyester plasticizer UN380 48Kg, antimony pentoxide 1Kg, calcium borate 2Kg, barium laurate 1Kg, hydrotalcite 1Kg, 4Kg of chlorinated polyethylene with a chlorine content of 30%, 3Kg of ethylene-vinyl acetate copolymer with a vinyl acetate unit content of 10%, 0.3Kg of oxidized paraffin, and 0.2Kg of butyl stearate are mixed; the mixed raw materials are put into In a high-speed blender, stir for 15 minutes at a temperature of 140° C.; extrude and granulate the stirred raw materials through a twin-screw extruder to obtain a heat-resistant and cold-resistant environmentally friendly PVC modified material; the screw of the twin-screw extruder The temperature is: zone 1 temperature 140°C, zone 2 temperature 140°C, zone 3 temperature 135°C, zone 4 temperature 135°C and zone 5 temperature 135°C. The mechanical and physical properties of the heat-resistant and cold-resista...

Embodiment 3

[0057] Weigh raw material SG-5 type PVC resin 100Kg, heavy calcium carbonate 12.5Kg, light calcium carbonate 12.5Kg, polyester plasticizer UN380 56Kg, antimony pentoxide 2Kg, calcium borate 3Kg, calcium stearate 2Kg, water Talc 2Kg, chlorine content is 35% chlorinated polyethylene 5Kg, vinyl acetate unit content 15% ethylene-vinyl acetate copolymer 4Kg, liquid paraffin 0.5Kg, sebacic acid oleyl 0.4Kg are mixed; After mixing The raw materials were put into a high-speed blender and stirred at 120°C for 20 minutes; the stirred raw materials were extruded and granulated through a twin-screw extruder to obtain a heat-resistant and cold-resistant environmentally friendly PVC modified material; the twin-screw extruder The temperature of the extruded screw is: 160°C in the first zone, 160°C in the second zone, 155°C in the third zone, 150°C in the fourth zone and 148°C in the fifth zone. The mechanical and physical properties of the heat-resistant and cold-resistant environmentally fr...

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Abstract

The invention relates to the technical field of polyvinyl chloride composite materials, and specifically relates to a heat-resisting and cold-resisting environment-friendly PVC (polyvinyl chloride) modified material and a preparation method thereof. The modified material comprises the raw materials in parts by weight as follows: 80-120 parts of PVC resins, 15-35 parts of a filling agent, 40-80 parts of a plasticizer, 1-10 parts of a fire retardant agent, 1-10 parts of a stabilizing agent, 5-15 parts of impact modifier and 0.2-2 parts of a lubricating agent. The preparation method comprises the steps that the raw materials are weighed in parts by weight to be mixed, after the stirring, extruding granulation is performed through a double screw extrusion machine, and the modified material is obtained. The prepared modified material has the excellent heat-resisting cold-resisting performance, the highest use temperature reaches 135 DEG C, and the lowest use temperature reaches subzero 65 DEG C; and meanwhile the modified material has the advantages of environmental friendliness, high intensity, good fire retardant effect, strong compression performance and toughness, and excellent processing performance and comprehensive performance. The preparation method is simple in processing, convenient to operate and control, stable in quality and high in production efficiency, so that the large-scale industrial production can be realized.

Description

technical field [0001] The invention relates to the technical field of polyvinyl chloride composite materials, in particular to a heat-resistant and cold-resistant environmentally friendly PVC modified material and a preparation method thereof. Background technique [0002] Polyvinyl chloride (PVC) is one of the earliest industrialized and widely used general-purpose thermoplastics. It has the advantages of light weight, high strength, insulation, flame retardancy, corrosion resistance, excellent comprehensive performance, low price and wide source of raw materials; but also There are the following disadvantages: 1. The toughness is poor, and it is easy to be brittle when impacted, so it cannot be used as a structural material. In addition, the brittleness of polyvinyl chloride is greatly affected by temperature. The lower limit of general PVC products is -15°C. The lower limit of use of PVC is -30°C; 2. Poor thermal stability, it begins to decompose HCl at 100°C, and decomp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/06C08L23/28C08L23/08C08K13/02C08K3/26C08K3/22C08K3/38B29C47/92B29C48/92
CPCB29C48/04B29C48/40
Inventor 宁建华朱其华
Owner 广东祺龙科技有限公司
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