Preparation method and application of vinyl chloride polymer

A technology of vinyl chloride polymer and polyvinyl chloride, applied in the field of preparation of vinyl chloride polymer, can solve problems such as environmental problems, application restrictions, high price and the like

Inactive Publication Date: 2020-10-30
HWASU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, its application is limited due to environmental concerns and high prices caused by the use of heavy metal stabilizers

Method used

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Examples

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Comparison scheme
Effect test

Embodiment Construction

[0018] The specific implementation manner of the present invention will be further described in detail through the description of the examples below.

[0019] The method for preparing a vinyl chloride polymer by bulk polymerization according to one embodiment of the present invention is characterized by comprising: prepolymerizing to form core particles (step 1); and adding a vinyl chloride monomer and a postpolymerization initiator to the core particles And post-polymerization (step 2), wherein, in the process of post-polymerization, relative to 100 parts by weight of vinyl chloride monomer, 0.001 to 10 parts by weight of modifier is added. Step 1 is a prepolymerization step for forming core particles of a vinyl chloride polymer and may be performed by adding a vinyl chloride monomer and a prepolymerization initiator to a reactor and prepolymerizing. Specifically, the prepolymerization can be performed by conventional methods known in the art without particular limitation. F...

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Abstract

The invention discloses a preparation method and application of a vinyl chloride polymer, and relates to the technical field of vinyl chloride; the method comprises the following steps: putting vinylchloride and an anti-bonding agent into a reactor; vacuumizing the reactor until the pressure is -0.1 MPa to -0.05 MPa, then introducing chlorine until the pressure in the reactor is 0.2 MPa to 0.6 MPa, carrying out chlorination reaction, discharging reaction waste gas after the reaction is finished, and repeating the operations of vacuumizing, introducing the chlorine for chlorination reaction and discharging the waste gas, so as to obtain chlorinated polyvinyl chloride. According to the preparation method of the vinyl chloride polymer according to the invention, the preparation method for the vinyl chloride polymer by bulk polymerization and the vinyl chloride polymer produced thereby can be easily applied to industries requiring vinyl chloride polymers, such as industries involving vinyl chloride resins and molded articles thereof.

Description

technical field [0001] The invention relates to the technical field of vinyl chloride, in particular, the invention relates to a preparation method and application of a vinyl chloride polymer. Background technique [0002] Vinyl chloride polymer is a polymer containing more than 50% vinyl chloride, which is cheap, easy to control hardness, suitable for most processing equipment and has various application fields. In addition, vinyl chloride polymers can provide molded products having excellent physical and chemical properties such as mechanical strength, weather resistance, and chemical resistance, and are widely used in various fields. However, vinyl chloride polymers cause dehydrochlorination due to defects in chemical structure generated during polymerization due to heat or ultraviolet rays applied during processing, thereby causing discoloration of the resin or deterioration of physical properties. [0003] Specifically, in the vinyl chloride polymer, there are chemical...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F114/06C08F8/22C08F2/44C08K3/36C08K7/26C08K3/34
CPCC08F2/44C08F8/22C08F114/06C08K3/34C08K3/36C08K7/26
Inventor 赵凯王明建卢鑫
Owner HWASU
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