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A heat-resistant and corrosion-resistant polyvinyl chloride water supply and drainage pipe and its preparation method

A technology for polyvinyl chloride and water supply and drainage pipes is applied in the field of water supply and drainage pipes to achieve the effects of good toughness, good thermal stability, and ensuring uniformity of heat resistance and thermal stability.

Active Publication Date: 2022-04-01
GUANGDONG LIANSU TECH INDAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to overcome the defects and deficiencies in the heat resistance of existing PVC-U water supply and drainage pipes, and provide a heat-resistant and corrosion-resistant polyvinyl chloride water supply and drainage pipe

Method used

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  • A heat-resistant and corrosion-resistant polyvinyl chloride water supply and drainage pipe and its preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0031] A heat-resistant and corrosion-resistant polyvinyl chloride water supply and drainage pipe, prepared from the following raw materials in parts by mass: 100 parts of polyvinyl chloride, 10 parts of ethylene-vinyl acetate oligomer, 3 parts of heat stabilizer, and 0.5 part of crosslinking agent , 0.4 parts of lubricant, 20 parts of filler, 0.2 parts of pigment, the viscosity number distribution of polyvinyl chloride is 118-107mL / g, the average degree of polymerization is 1140, the molecular weight of ethylene-vinyl acetate oligomer is 1000, vinyl acetate The content of ester units was 15%.

[0032] The preparation method of the heat-resistant and corrosion-resistant polyvinyl chloride water supply and drainage pipe comprises the following steps:

[0033] S1. Inhale the above raw materials into a high-speed mixer, and mix at a high speed of 90°C to 100°C for 8 minutes to remove volatile components;

[0034] S2. Transfer the mixed product of the above S1 into a low-speed mi...

Embodiment 2

[0037] A heat-resistant and corrosion-resistant polyvinyl chloride water supply and drainage pipe, prepared from the following raw materials in parts by mass: 100 parts of polyvinyl chloride, 15 parts of ethylene-vinyl acetate oligomer, 4 parts of heat stabilizer, and 0.6 part of crosslinking agent , 0.4 parts of lubricant, 20 parts of filler, 0.2 parts of pigment, the viscosity number distribution of polyvinyl chloride is 118-107mL / g, the average degree of polymerization is 1140, the molecular weight of ethylene-vinyl acetate oligomer is 1000, vinyl acetate The content of ester units was 25%.

[0038] The preparation method of the heat-resistant and corrosion-resistant polyvinyl chloride water supply and drainage pipe comprises the following steps:

[0039] S1. Inhale the above raw materials into a high-speed mixer, and mix at a high speed of 90°C to 100°C for 6 minutes to remove volatile components;

[0040] S2. Transfer the mixed product of the above S1 into a low-speed mi...

Embodiment 3

[0043] A heat-resistant and corrosion-resistant polyvinyl chloride water supply and drainage pipe, prepared from the following raw materials in parts by mass: 100 parts of polyvinyl chloride, 20 parts of ethylene-vinyl acetate oligomer, 4 parts of heat stabilizer, and 0.8 part of crosslinking agent , 0.4 parts of lubricant, 20 parts of filler, 0.2 parts of pigment, the viscosity number distribution of polyvinyl chloride is 118-107mL / g, the average degree of polymerization is 1000, the molecular weight of ethylene-vinyl acetate oligomer is 2000, vinyl acetate The content of ester units was 20%.

[0044] The preparation method of the heat-resistant and corrosion-resistant polyvinyl chloride water supply and drainage pipe comprises the following steps:

[0045] S1. Inhale the above raw materials into a high-speed mixer, and mix at a high speed of 90°C to 100°C for 6 minutes to remove volatile components;

[0046] S2. Transfer the mixed product of the above S1 into a low-speed mi...

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Abstract

The invention discloses a heat-resistant and corrosion-resistant polyvinyl chloride water supply and drainage pipe and a preparation method thereof. The polyvinyl chloride water supply and drainage pipe is prepared from the following raw materials in parts by mass: 100 parts of polyvinyl chloride, 10-30 parts of ethylene-vinyl acetate oligomer, 2-5 parts of heat stabilizer, 0.5-2.0 parts of crosslinking agent, Lubricant 0.4-1.0 parts, filler 10-25 parts, pigment 0.1-0.5 parts. The heat-resistant and corrosion-resistant polyvinyl chloride water supply and drainage pipe of the present invention is prepared by chemical crosslinking between the heat-resistant component and the toughening component molecules and the PVC-U molecule. Compared with blending, copolymerization and chlorination resistance Thermal modification has great advantages, not only high heat resistance temperature, good thermal stability, card softening point greater than 100 ℃, it can be used for a long time at 70 ℃, and good toughness, longitudinal shrinkage rate does not exceed 3%, and this The preparation process provided by the invention is simple and low in cost, and is convenient for large-scale popularization and use.

Description

technical field [0001] The invention relates to the technical field of water supply and drainage pipes, in particular to a heat-resistant and corrosion-resistant polyvinyl chloride water supply and drainage pipe and a preparation method thereof. Background technique [0002] Polyvinyl chloride (PVC) is one of the earliest industrialized, widely used, and second largest 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 PVC has shortcomings such as low impact strength, poor thermal stability, and poor fluidity, which limit its use to a certain extent. Modifiers and flow modifiers to improve the performance of PVC. At present, plastic pipes have generally replaced metal pipes as cold and hot water supply and drainage pipes, but PVC-U water supply and drainage pipes can only be used in ordinary cold water ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L27/06C08L23/08C08K13/02C08K5/098C08K5/526C08K5/07
CPCC08L27/06C08K2201/014C08L2201/08C08L2203/18C08L23/0853C08K13/02C08K5/098C08K5/526C08K5/07
Inventor 陈勇李统一宋科明
Owner GUANGDONG LIANSU TECH INDAL
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