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Low-temperature-brittleness-resistant PVC pipe material and preparation method thereof

A PVC pipe, low temperature resistance technology, applied in the field of plastic products, can solve the problems of control, high production cost, difficult production process, etc., and achieve the effects of easy processing, improved low temperature brittleness, and good weather resistance

Inactive Publication Date: 2015-04-29
SHANGHAI BANZAN MACROMOLECULE MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a PVC pipe, which is used to overcome the disadvantages of the prior art that the raw material components of PVC pipes are various, and a large number of additives are used, which makes the production process difficult to control and has high production costs.

Method used

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  • Low-temperature-brittleness-resistant PVC pipe material and preparation method thereof
  • Low-temperature-brittleness-resistant PVC pipe material and preparation method thereof
  • Low-temperature-brittleness-resistant PVC pipe material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027]

[0028] Wherein, the toughening agent is dioctyl phthalate; the APAO has moderate molecular weight, good elasticity, certain fluidity and wettability, which can improve the processability of the PVC mixed system and improve the cold resistance at low temperature. The number average molecular weight is 09,000 to 13,000;

[0029] 1) According to the parts by weight of each raw material component, PVC, polyacrylate, toughening agent, active nano-calcium carbonate, stabilizer and APAO are mixed at high speed;

[0030] 2) The material is cooled to 40-50°C by a cold mixer;

[0031] 3) Extrude into powder with a twin-screw extruder, and the extrusion temperature of the twin-screw extruder is 110-120°C.

[0032] PVC pipes are obtained after vacuum calibrating box and pipe traction cutting. Test the impact resistance at 0°C according to GB / T 14152, and measure the embrittlement temperature by impact method according to GB / T5470-2008.

Embodiment 2

[0034]

[0035] Wherein, the toughening agent is dioctyl phthalate; the APAO has moderate molecular weight, good elasticity, certain fluidity and wettability, which can improve the processability of the PVC mixed system and improve the cold resistance at low temperature. The number average molecular weight is 14,000 to 20,000;

[0036] 1) According to the parts by weight of each raw material component, PVC, polyacrylate, toughening agent, active nano-calcium carbonate, stabilizer and APAO are mixed at high speed;

[0037] 2) The material is cooled to 40-50°C by a cold mixer;

[0038] 3) Extrude into powder with a twin-screw extruder, and the extrusion temperature of the twin-screw extruder is 110-120°C.

[0039] PVC pipes are obtained after vacuum calibrating box and pipe traction cutting. Test the impact resistance at 0°C according to GB / T 14152, and measure the embrittlement temperature by impact method according to GB / T5470-2008.

Embodiment 3

[0041]

[0042] Wherein, the toughening agent is dioctyl phthalate; the APAO has moderate molecular weight, good elasticity, certain fluidity and wettability, which can improve the processability of the PVC mixed system and improve the cold resistance at low temperature. The number average molecular weight is 15,000 to 18,000;

[0043] 1) According to the parts by weight of each raw material component, PVC, polyacrylate, toughening agent, active nano-calcium carbonate, stabilizer and APAO are mixed at high speed;

[0044] 2) The material is cooled to 40-50°C by a cold mixer;

[0045] 3) Extrude into powder with a twin-screw extruder, and the extrusion temperature of the twin-screw extruder is 110-120°C.

[0046] PVC pipes are obtained after vacuum calibrating box and pipe traction cutting.

[0047] Specifically, in Examples 1 to 3, after cooling and shaping in a vacuum qualitative box of 0.05 MPa, PVC pipes were drawn and cut at a speed of 4 m / min.

[0048] Test the impa...

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Abstract

The invention discloses a low-temperature-brittleness-resistant PVC pipe material. The PVC pipe comprises the following raw material components in parts by weight: 100 parts of PVC, 1-15 parts of polyacrylate, 15-30 parts of toughening agent, 10-20 parts of active nanometer calcium carbonate, 2-7 parts of stabilizing agent and 4-10 parts of APAO. PVC pipes prepared by using the PVC pipe material disclosed by the invention have good impact resistance, cold resistance and weather resistance, and have remarkably better low temperature brittleness than that of the PVC pipes in the prior art; the PVC pipe material disclosed by the invention is easily processed, and the homogeneity between the components of the PVC pipe material is good; and the material cost and production cost of the PVC pipe material are low.

Description

technical field [0001] The invention relates to the field of plastic products, in particular to a novel low-temperature brittle-resistant PVC pipe material. Background technique [0002] Polyvinyl chloride (PVC) is the second largest plastic species after polyethylene in the world. It has good mechanical and physical properties. The PVC pipe made of it has good mechanical and physical properties due to its light weight. The made PVC pipe has been widely used due to its corrosion resistance, high compressive strength, safety and convenience, etc. At present, about 70% of PVC pipes are used in construction fields such as drainage / water supply, but the biggest defect of PVC pipes is cold resistance and low temperature The impact resistance is poor, and the lower limit of the operating temperature is about -15°C, which greatly limits the use of PVC pipes. For example, when PVC pipes are used in northern China, they are prone to brittle cracks in winter. Various additives are us...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/06C08L33/08C08L23/00C08K13/02C08K3/26C08K5/12B29C47/92B29C48/92
CPCC08L27/06B29C48/92B29C2948/92704C08K2201/011C08L2201/08C08L2203/18C08L2205/03C08L33/04C08L23/00C08K13/02C08K2003/265C08K5/12
Inventor 储江顺毕宏海毕宏江程安顺
Owner SHANGHAI BANZAN MACROMOLECULE MATERIAL
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