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High-performance chlorinated polyvinyl chloride plastic

A technology of chlorinated polyvinyl chloride and polyvinyl chloride, which is applied to the physical and chemical parameters of materials and the field of modified plastics of chlorinated polyvinyl chloride, can solve the problems of high low-temperature brittleness, increased processing difficulty, and poor impact resistance, and achieves High impact strength, good physical and chemical properties, good chemical stability

Inactive Publication Date: 2002-01-23
张小文
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its disadvantage is that its melt viscosity is at least twice that of polyvinyl chloride, which increases the friction between it and processing equipment, and the friction heat generated increases. Due to thermal decomposition, a large amount of hydrogen chloride gas is produced, which makes processing and molding difficult. And seriously corrode the processing equipment, the processing difficulty increases, and it is not easy to process; its low-temperature brittleness is higher than that of polyvinyl chloride, and its impact resistance is poor; its price is 3 to 4 times that of polyvinyl chloride, and the price is high
These pairs are processed into various products, and the use of these products brings difficulties

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Embodiment 1: Vicat softening reaches 120 ℃ component (weight ratio)

[0043] Chlorinated polyvinyl chloride 100

[0044] Polyvinyl chloride 11.1

[0045] Lead complex with lubrication system 8.89

[0046] Methacrylate impact modifier 8.89

[0047] Partially oxidized polyethylene wax 0.02

[0048] Active light CaCo 3 3.33 The above components are made into pipes through the following process:

[0049] Component raw materials→high-speed mixing→low-speed cold mixing→extrusion by twin-screw extruder→head mold forming→vacuum cooling and shaping→spray cooling→traction→cutting to length→flaring→inspection→packing and storage.

[0050] Its process parameters are:

[0051] 1. Temperature control range (°C):

[0052] 1. High speed mixing 110~130

[0053] 2. Low speed cold mixing 40~50

[0054] 3. Twin-screw extruder barrel:

[0055](I) District 180~205

[0056] (II) District 175~200

[0057] (III) District 170~195

[0058] (IV) District 170~195

[0059] ...

Embodiment 2

[0074] Embodiment 2: Vicat softening point is 110 ℃ of components (weight ratio)

[0075] Chlorinated polyvinyl chloride 100

[0076] PVC 25

[0077] Lead complex with lubrication system 7.75

[0078] Methacrylate Impact Modifier 10

[0079] Partially oxidized polyethylene wax 0.375

[0080] Active light CaCo 3 12.5

[0081] Other process flow and process parameter control are identical to embodiment 1.

Embodiment 3

[0082] Embodiment 3: Vicat softening point is 105 ℃ of components (weight ratio)

[0083] Chlorinated polyvinyl chloride 100

[0084] PVC 50

[0085] Lead complex with lubrication system 12.8

[0086] Methacrylate Impact Modifier 12

[0087] Partially oxidized polyethylene wax 0.9

[0088] Active light CaCo 3 46 Other process flow and process parameter control are identical to embodiment 1.

[0089] Generally speaking, when the ratio of polyvinyl chloride increases the temperature of its Vicat softening point and reduces, but the physicochemical index of its product can reach impact strength (KJ / m 2 )≥12, Vicat softening point (°C) 90-120, oxygen index (%) 50-60.

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Abstract

The present invention relates to a polymer material, modified chlorinated polyvinyl chloride plastic. It consists of in weight ratio chlorinated polyvinyl chloride 100, polyvinyl chloride 2-160, composite lead stabilizer 4-12, methyl acrylate as shock modifier 2-14, partially oxidized polyethylene wax 0.05-0.9, active light CaCO3 0.05-80. It has excellent physical and chemical performance including chemical stability, heat resistance, corrosion resistance, fireproofing, shock strength, weather resistance and ultraviolet resistance. In addition, it has relatively lower cost, and may be used widely in producing various plastic products.

Description

technical field [0001] The invention belongs to polymer plastic materials, especially modified plastics of chlorinated polyvinyl chloride, and relates to its composition, process control parameters and physical and chemical parameters of materials. Background technique [0002] In industry, agriculture, mining, communication, electric power, construction, environmental protection and human daily life, the use of plastics and their products has been widely used. For example, plastic pipes are widely used to transport liquids and gases. Plastic pipes have light weight, With the advantages of corrosion resistance and easy installation, its application has been developed rapidly. The current plastics are mainly polyvinyl chloride (PVC), polyethylene (PE), ABS, etc. However, the main defect of polyvinyl chloride is that the heat-resistant temperature is not high, and the long-term working temperature cannot exceed 60°C, and as the temperature increases, its o...

Claims

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Application Information

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IPC IPC(8): C08K5/09C08L27/06C08L27/24
Inventor 张小文
Owner 张小文
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