Method for preparing hard polyvinyl chloride plastic toughening and reinforcing agent

A rigid polyvinyl chloride, toughening and reinforcing agent technology, applied in chemical instruments and methods, fibrous fillers, inorganic pigment treatment and other directions, can solve the problem of insignificant toughening effect, reduced tensile strength, poor modification effect, etc. problem, to achieve the effect of no dust pollution, not easy to desorb, and complete modification

Inactive Publication Date: 2010-05-12
EAST CHINA JIAOTONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In addition, the search found that the patent announcement number CN1006892 discloses a rigid polyvinyl chloride toughening method, which is to use non-polar synthetic rubber and polyvinyl chloride mechanical blending method to make rigid polyvinyl chloride tough, although The toughening effect is obvious, but the tensile strength will be reduced and the cost will be higher
Patent announcement number CN1272377 discloses a polyvinyl chloride toughened and reinforced masterbatch and its preparation method and application. The method uses

Method used

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  • Method for preparing hard polyvinyl chloride plastic toughening and reinforcing agent
  • Method for preparing hard polyvinyl chloride plastic toughening and reinforcing agent
  • Method for preparing hard polyvinyl chloride plastic toughening and reinforcing agent

Examples

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Embodiment 1

[0025] This embodiment is a preparation method of a toughening and strengthening agent for rigid polyvinyl chloride

[0026] a. Inorganic powder slurry preparation and ultrasonic assisted dispersion

[0027] Weigh 100g of 400-mesh calcium carbonate powder and 400g of ethylene glycol methyl ether solvent. Pour the mixed slurry into a three-necked flask. Heat in a water bath. The temperature of the water bath is 50°C. The stirring speed is 200 rpm and stirring for 10 minutes. Afterwards, move the three-necked flask into an ultrasonic container, continue to use a 50°C water bath for heating, and ultrasonically disperse for 15 minutes at an ultrasonic frequency of 2500 Hz to obtain a powder slurry.

[0028] b. Inorganic mineral powder coupling modification

[0029] After the powder slurry is obtained in the previous stage, the ultrasonic device is removed, and the vinyl triethoxy silane coupling agent with double bonds is gradually added dropwise to the three-necked flask. The amount of s...

Embodiment 2

[0035] a. Inorganic powder slurry preparation and ultrasonic assisted dispersion

[0036] Weigh 100g of 1250 mesh calcium carbonate powder, mix with 330g of ethylene glycol methyl ether solvent, pour the mixed slurry of the two into a three-necked flask, heat in a water bath, the temperature of the water bath is 65℃, the stirring speed is 300 rpm, stirring for 30 minutes After that, move the three-necked flask into an ultrasonic container, continue to use 65 ℃ water bath heating while ultrasonic dispersion for 30 minutes, the ultrasonic frequency is 2000 Hz, the powder slurry can be obtained.

[0037] b. Inorganic mineral powder coupling modification

[0038] After the powder slurry is obtained in the previous stage, the ultrasonic device is removed, and the vinyl trimethoxysilane coupling agent with double bonds is gradually added dropwise to the three-necked flask. The amount of silane coupling agent is 1g. The temperature of the control system is 80°C, the stirring speed is 400 r...

Embodiment 3

[0044] a. Inorganic powder slurry preparation and ultrasonic assisted dispersion

[0045] Weigh 100g of 2500 mesh calcium carbonate powder and 400g of ethylene glycol methyl ether solvent. Pour the mixed slurry into a three-necked flask, heat in a water bath, the temperature of the water bath is 50℃, stirring speed 300 rpm, stirring for 15 minutes Afterwards, move the three-necked flask into an ultrasonic container, continue to use a 50°C water bath for heating, and ultrasonically disperse for 30 minutes at an ultrasonic frequency of 2500 Hz to obtain a powder slurry.

[0046] b. Inorganic mineral powder coupling modification

[0047] After the powder slurry is obtained in the previous stage, the ultrasonic device is removed, and the vinyltrimethoxysilane coupling agent with double bonds is gradually added dropwise to the three-necked flask. The amount of silane coupling agent is 1.0g. The temperature of the system is controlled at 70°C, the stirring speed is 300 rpm, and the time i...

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Abstract

The invention discloses a method for preparing a hard polyvinyl chloride plastic toughening and reinforcing agent. The method mainly comprises the following steps: (1) preparation and ultrasonic auxiliary dispersion for inorganic powder slurry, namely mixing inorganic mineral powder calcium carbonate (or calcium sulfate, talc powder, mica powder or kaolin) and ethylene glycol methyl ether solvent, and heating, stirring and ultrasonically dispersing the mixed slurry to obtain powder slurry; (2) coupling modification for inorganic mineral powder, wherein a silane coupling agent adopted by the coupling modification is one of vinyl triethoxy silane and vinyl trimethoxy silane; (3) multilayer modification for organic monomers of the inorganic mineral powder, wherein a soft organic monomer adopted by the inorganic mineral powder modification is one of ethyl acrylate, butyl acrylate and ethyl hexyl acrylate; and a hard organic monomer is one of styrene, methyl methacrylate and vinyl acetate, acrylonitrile and acrylic amide; and (4) post treatment for the modified powder. The method is suitable for preparing the hard polyvinyl chloride plastic toughening and reinforcing agent.

Description

Technical field [0001] The invention relates to a preparation method of a toughening and strengthening agent for rigid polyvinyl chloride plastic, belonging to the technical field of new materials and chemical industry. Background technique [0002] In the process of preparing rigid polyvinyl chloride plastic products, in order to improve the mechanical properties of rigid plastic products, blending modification methods or inorganic powder filling modification methods are used. In order to improve the toughness of rigid plastic products, flexible plastics and rigid plastics are blended and modified to achieve the effect. However, the negative effect is that the tensile strength of rigid plastic products will decrease and the production cost will increase. There are also reports that the use of inexpensive and rigid inorganic particles also has a toughening effect, but its effect is not obvious. In most cases, the increase in tensile strength is more significant. In addition, inor...

Claims

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Application Information

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IPC IPC(8): C09C3/00C09C3/04C09C3/12C09C3/10C08F292/00C09C1/02C09C1/28C08K9/10C08L27/06
Inventor 王少会
Owner EAST CHINA JIAOTONG UNIVERSITY
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