PVC (Polyvinyl Chloride) pipe and preparation method thereof

A PVC pipe material and PVC resin technology, applied in the direction of pipes, rigid pipes, mechanical equipment, etc., can solve the problems of limited improvement in impact resistance, and achieve the effects of improved impact resistance, high yield, and simple steps

Active Publication Date: 2014-10-01
ANHUI YUANFENG PIPELINE TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, the impact resistance of PVC rigid products is usually modified by adding a single impact modifier, but the impact resistance of PVC rigid products is limited by a single impact modifier.

Method used

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  • PVC (Polyvinyl Chloride) pipe and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] 100kg of PVC resin, 50kg of calcium carbonate, 15kg of CPE, 15kg of EPDM, 1.5kg of stearic acid, 2kg of titanium dioxide, 2kg of paraffin, 0.1kg of OB fluorescent whitening agent, 2.5kg of Calcium stearate, 2.5kg of zinc stearate and 1kg of PE wax were extruded at 170°C to prepare a PVC pipe A1 with a wall thickness of 4mm and an outer diameter of 160mm. Among them, the average degree of polymerization of PVC resin is 800, the weight average molecular weight of PE wax is 3000, the weight average molecular weight of CPE is 200,000, the weight average molecular weight of EPDM is 300,000, the particle size of calcium carbonate is 300 μm, the particle size of titanium dioxide is The diameter is 0.2 μm. A1 was tested for tensile strength and impact resistance, and the test results are shown in Table 1.

Embodiment 2

[0021] 100kg of PVC resin, 50kg of calcium carbonate, 15kg of CPE, 15kg of EPDM, 1.5kg of stearic acid, 2kg of titanium dioxide, 2kg of paraffin, 0.1kg of OB fluorescent whitening agent, 2.5kg of Calcium stearate, 2.5 kg of zinc stearate and 1 kg of PE wax were extruded at 170° C. to prepare a PVC pipe A2 with a wall thickness of 4 mm and an outer diameter of 160 mm. Among them, the average degree of polymerization of PVC resin is 720, the weight average molecular weight of PE wax is 2000, the weight average molecular weight of CPE is 200,000, the weight average molecular weight of EPDM is 200,000, the particle size of calcium carbonate is 130 μm, the particle size of titanium dioxide is The diameter is 0.3 μm. A2 was tested for tensile strength and impact resistance, and the test results are shown in Table 1.

Embodiment 3

[0023] 100kg of PVC resin, 50kg of calcium carbonate, 15kg of CPE, 15kg of EPDM, 1.5kg of stearic acid, 2kg of titanium dioxide, 2kg of paraffin, 0.1kg of OB fluorescent whitening agent, 2.5kg of Calcium stearate, 2.5 kg of zinc stearate and 1 kg of PE wax were extruded at 170° C. to prepare a PVC pipe A3 with a wall thickness of 4 mm and an outer diameter of 160 mm. Among them, the average degree of polymerization of PVC resin is 850, the weight average molecular weight of PE wax is 5000, the weight average molecular weight of CPE is 300,000, the weight average molecular weight of EPDM is 400,000, the particle size of calcium carbonate is 450 μm, the particle size of titanium dioxide is The diameter is 0.05 μm. A3 was tested for tensile strength and impact resistance, and the test results are shown in Table 1.

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Abstract

The invention discloses a method for preparing a PVC (Polyvinyl Chloride) pipe. The method comprises the following step: carrying out extrusion moulding on PVC resin, a stabilizing agent, CPE (Chlorinated Polyethylene), EPDM (Ethylene-Propylene-Diene Monomer), stearic acid, a filling agent, paraffin, an OB fluorescent whitening agent and PE (Poly Ethylene) wax to obtain the PVC pipe, wherein the average degree of polymerization of the PVC resin is 720-850; the weight-average molecular weight of the PE wax is 2000-5000; the weight-average molecular weight of the CPE is 100000-300000, and the chlorine content of the CPE is 25-45 parts by weight relative to 100 parts by weight of the CPE; the weight-average molecular weight of the EPDM is 200000-400000; the stabilizing agent is one or more of calcium stearate, calcium ricinoleate, zinc stearate and zinc ricinoleate; the filling agent is calcium carbonate and/or titanium dioxide. The PVC pipe disclosed by the invention has excellent impact-resistant property.

Description

technical field [0001] The invention relates to the field of plastic pipes, in particular to a PVC pipe and a preparation method thereof. Background technique [0002] Polyvinyl chloride (PVC) hard products have poor impact resistance due to the poor impact resistance of pure PVC material itself, especially the poor impact resistance at low temperature, which limits its application in many fields. At present, it is mainly to add impact modifiers to pure PVC materials to improve impact resistance. Impact modifiers mainly include CPE (chlorinated polyethylene), ACR (acrylate polymer), MBS (methyl methacrylate-butadiene-styrene copolymer), ABS (acrylonitrile-butadiene - Styrene Copolymer), EVA (Ethylene-Vinyl Acetate Copolymer), EPR (Ethylene Propylene Diene Monomer), EPDM (Ethylene Propylene Diene Monomer) and Nitrile Butadiene Rubber (NBR). In the prior art, the impact resistance of rigid PVC products is usually modified by adding a single impact modifier, but the improveme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/06C08L23/28C08L23/16C08K5/098C08K3/26C08K3/22F16L9/12
Inventor 伍克军
Owner ANHUI YUANFENG PIPELINE TECH CO LTD
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