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Low temperature resistant environment-friendly polyvinyl chloride (PVC) modified material and preparing method thereof

A technology of modified materials and low temperature resistance, which is applied in the field of low temperature resistant and environmentally friendly PVC modified materials and its preparation, and can solve problems such as human health hazards, poor fluidity, and pollution

Active Publication Date: 2013-04-24
广东祺龙科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Polyvinyl chloride (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.
[0005] The performance indicators of most of the existing PVC materials only meet the basic requirements of national standards. For many special environments such as low temperature environments, low temperature oils or gases such as low temperature refined oil, liquefied natural gas, ethylene oxide, liquid carbon dioxide Compressed natural gas is required to use low-temperature-resistant PVC materials during storage and use. The performance of current PVC materials cannot reliably meet the needs of long-term use under low-temperature conditions. The lowest temperature can only reach -30°C. The low temperature performance needs to be further optimized and improved; in addition, the existing PVC sheathed cables, PVC plugs, PVC films and PVC pipes all have quite serious pollution, which will cause certain harm to human health. An environmentally friendly PVC modified Materials are also very important

Method used

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  • Low temperature resistant environment-friendly polyvinyl chloride (PVC) modified material and preparing method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0057] Weigh 80Kg of SG-5 PVC resin, 10Kg of heavy calcium carbonate, 10Kg of colloidal calcium carbonate, 30Kg of diisononyl phthalate, 10Kg of dioctyl adipate, 1Kg of epoxy soybean oil, and nitrile rubber. 0.5Kg, butadiene rubber 0.5Kg, antimony pentoxide 0.5Kg, magnesium hydroxide 0.5Kg, barium stearate 0.5Kg, dibutyltin dilaurate 0.5Kg, 25% chlorine content of chlorinated polyethylene 5Kg, 0.1Kg of paraffin wax and 0.1Kg of stearic acid amide; put the mixed raw materials into a high-speed blender and stir at 100°C for 25 minutes; extrude the mixed raw materials through a twin-screw extruder to produce Low temperature resistant environmentally friendly PVC modified material; the screw temperature of the twin-screw extruder is: a zone temperature of 138°C, a second zone temperature of 135°C, a third zone temperature of 135°C, a fourth zone temperature of 132°C and a fifth zone temperature of 130°C . The mechanical and physical properties of the low-temperature resistant and ...

Embodiment 2

[0059] Weigh 90Kg of SG-7 PVC resin, 13Kg of heavy calcium carbonate, 12Kg of colloidal calcium carbonate, 34Kg of diisononyl phthalate, 12Kg of dioctyl adipate, 2Kg of epoxy soybean oil, and nitrile rubber 1Kg, butadiene rubber 1Kg, antimony pentoxide 1Kg, magnesium hydroxide 2Kg, barium laurate 1Kg, di-n-octyltin dilaurate 1Kg, chlorinated polyethylene with 30% chlorine content 7Kg, paraffin oxide 0.3Kg, fatty acid Alkanolamide 0.2Kg mixing; put the mixed raw materials into a high-speed blender and stir at 140℃ for 15 minutes; extrude and pelletize the mixed raw materials through a twin-screw extruder to produce low-temperature resistant environmentally friendly PVC Modified material; the screw temperature of the twin-screw extruder is: a zone temperature of 140°C, a second zone temperature of 140°C, a third zone temperature of 135°C, a fourth zone temperature of 135°C, and a fifth zone temperature of 135°C. The mechanical and physical properties of the low-temperature resist...

Embodiment 3

[0061] Weigh 100Kg of SG-5 PVC resin, 16Kg of heavy calcium carbonate, 14Kg of colloidal calcium carbonate, 38Kg of diisononyl phthalate, 14Kg of dioctyl adipate, 4Kg of epoxy soybean oil, and nitrile rubber 2Kg, butadiene rubber 2Kg, antimony pentoxide 2Kg, magnesium hydroxide 3Kg, calcium stearate 2Kg, isooctyl tin dimethyl dimercaptoacetate 2Kg, chlorinated polyethylene with 30% chlorine content 9Kg, liquid 0.5Kg of paraffin wax and 0.4Kg of erucamide were mixed; put the mixed raw materials into a high-speed blender and stir at 120°C for 20 minutes; extrude and pelletize the mixed raw materials through a twin-screw extruder to obtain Low temperature resistant and environmentally friendly PVC modified material; the screw temperature of the twin-screw extruder 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 low-temperature resistant and environment...

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Abstract

The invention relates to the technical field of polyvinyl chloride composite materials, in particular to a low temperature resistant environment-friendly polyvinyl chloride (PVC) modified material and a preparing method thereof. The modified material comprises by weight, 80-120 parts of PVC resin, 20-45 parts of filling agent, 41-80 parts of plasticizer, 1-10 parts of cold-resistant modifying agent, 1-10 parts of fire retardant, 1-10 parts of stabilizing agent, 5-15 parts of impact modifier and 0.2-2 parts of lubricating agent. Each raw material is weighed by weight and mixed, after being stirred; the raw material is squeezed out of prilling through a double-screw extruder and the modified material is available. The low temperature resistant performance of the modified material manufactured by the preparing method is fine; the minimum usage temperature can reach below 65 DEG C. The modified material is environment-friendly and has the advantages of high intensity, good flame retardant effects, strong compression performance and toughness, excellent processing performance and better comprehensive performance. The preparing method of the low temperature resistant environment-friendly polyvinyl chloride (PVC) modified material has the advantages of being simple in technology, convenient to control and operate, stable in quality, high in production efficiency. In addition, the preparation method of the low temperature resistant environment-friendly polyvinyl chloride (PVC) modified material can be used for a large scale industrial production.

Description

technical field [0001] The invention relates to the technical field of polyvinyl chloride composite materials, in particular to a low-temperature resistant and 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 decomposes...

Claims

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Application Information

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IPC IPC(8): C08L27/06C08L9/02C08L9/00C08L23/28C08K13/02C08K3/26C08K5/12C08K5/11C08K5/1515C08K3/22B29C47/92B29C48/92
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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