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Chlorinated polyvinyl chloride plastic and preparing process thereof

A chlorinated polyvinyl chloride and polyvinyl chloride technology, which is applied in the field of modified plastics of chlorinated polyvinyl chloride and the physical and chemical parameters of materials, can solve the problems of high low temperature brittleness, increased processing difficulty, and increased frictional heat, etc. Good chemical stability, good physical and chemical properties, high impact strength

Inactive Publication Date: 2004-12-22
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 the processing equipment, and the friction heat generated increases. Due to thermal decomposition, a large amount of hydrogen chloride gas is generated, resulting in processing molding. Difficult and severely corroded 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

[0044] Example 1: Vicat softening up to 120°C

[0045] Components by weight ratio:

[0046] Chlorinated polyvinyl chloride 100

[0047]Polyvinyl chloride 11.1

[0048] Lead complex with lubrication system 8.89

[0049] Methacrylate impact modifier 8.89

[0050] Partially oxidized polyethylene wax 0.02

[0051] Active light CaCo3 3.33

[0052] The above components are made into pipes through the following process:

[0053] 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.

[0054] The raw materials of the above components are mixed in a high-speed mixer, and the mixing temperature is controlled at 110°C to 130°C; then cold-mixed at a low speed, and the cold-mixing temperature is controlled at 40°C to 50°C, and extruded through a twin-screw extruder. The temperature of the twin-screw extruder barrel is...

Embodiment 2

[0074] Example 2: Vicat softening point is 110°C

[0075] Components by weight ratio:

[0076] Chlorinated polyvinyl chloride 100

[0077] PVC 25

[0078] Lead complex with lubrication system 7.75

[0079] Methacrylate Impact Modifier 10

[0080] Partially oxidized polyethylene wax 0.375

[0081] Active light CaCo3 12.5

[0082] Other process flow and process parameter control are identical to embodiment 1.

Embodiment 3

[0083] Example 3: The Vicat softening point is 105°C

[0084] Components by weight ratio:

[0085] Chlorinated polyvinyl chloride 100

[0086] PVC 50

[0087] Lead complex with lubrication system 12.8

[0088] Methacrylate Impact Modifier 12

[0089] Partially oxidized polyethylene wax 0.9

[0090] Active light CaCo3 46

[0091] Other process flow and process parameter control are identical to embodiment 1.

[0092] In general, when the proportion of polyvinyl chloride increases, the temperature of its Vicat softening point decreases, but within the scope of the composition of the present invention, the physical and chemical indicators of its products can reach impact strength ≥ 12KJ / m 2 , The Vicat softening point is between 90°C and 120°C, and the oxygen index is between 50% and 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, i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08K5/09C08L27/06C08L27/24
Inventor 张小文
Owner 张小文