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Preparation method of hydrophobic polyvinyl chloride granules

A technology of polyvinyl chloride and hydrophobicity, which is applied in the field of preparation of hydrophobic polyvinyl chloride pellets, can solve the problems of poor practicability of hydrophobic polyvinyl chloride, achieve the effect of reducing the risk of cracks and improving the surface strength

Active Publication Date: 2020-07-24
WUXI JIAHONG PLASTICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problems in the prior art, the present invention provides a preparation method of hydrophobic polyvinyl chloride pellets, which solves the problem that the existing hydrophobic polyvinyl chloride process is not practical, and utilizes the solubility of polyvinyl chloride to cooperate with methyl silicon The polymerization stability of the resin realizes the hydrophobic modification of the surface of polyvinyl chloride pellets

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A preparation method of hydrophobic polyvinyl chloride pellets, comprising the steps of:

[0024] Step 1, adding polyvinyl chloride into cyclohexanone and sonicating at low temperature for 1 hour to obtain a solution;

[0025] Step 2, dissolving methyltrichlorosilane in toluene to form and stir evenly, and distilling under reduced pressure to obtain saturated silicon toluene liquid;

[0026] Step 3, apply the solution evenly on the polyvinyl chloride pellets, let stand for 1 min to form a surface liquid film, then spray the silicon toluene solution on the surface liquid film to form polyvinyl chloride pellets with wet film;

[0027] Step 4, spray the ethanol aqueous solution on the surface of polyvinyl chloride and let it stand for 30 minutes, then dry the polyvinyl chloride pellets in two gradients to obtain prefabricated polyvinyl chloride pellets;

[0028] Step 5, spraying cyclohexanone on the surface of the prefabricated polyvinyl chloride pellets, rolling and cool...

Embodiment 2

[0036] A preparation method of hydrophobic polyvinyl chloride pellets, comprising the steps of:

[0037] Step 1, adding polyvinyl chloride to cyclohexanone and sonicating at low temperature for 2 hours to obtain a solution;

[0038] Step 2, dissolving methyltrichlorosilane in toluene to form and stir evenly, and distilling under reduced pressure to obtain saturated silicon toluene liquid;

[0039] Step 3, apply the solution evenly on the polyvinyl chloride pellets, let stand for 5 minutes to form a surface liquid film, and then spray the silicon toluene solution on the surface liquid film to form polyvinyl chloride pellets with a wet film;

[0040] Step 4, spray the ethanol aqueous solution on the surface of polyvinyl chloride and let it stand for 50 minutes, then dry the polyvinyl chloride pellets in two gradients to obtain prefabricated polyvinyl chloride pellets;

[0041]Step 5, spraying cyclohexanone on the surface of the prefabricated polyvinyl chloride pellets, rolling ...

Embodiment 3

[0049] A preparation method of hydrophobic polyvinyl chloride pellets, comprising the steps of:

[0050] Step 1, adding polyvinyl chloride to cyclohexanone and sonicating at low temperature for 2 hours to obtain a solution;

[0051] Step 2, dissolving methyltrichlorosilane in toluene to form and stir evenly, and distilling under reduced pressure to obtain saturated silicon toluene liquid;

[0052] Step 3, apply the solution evenly on the polyvinyl chloride pellets, let stand for 3 minutes to form a surface liquid film, and then spray the silicon toluene solution on the surface liquid film to form polyvinyl chloride pellets with wet film;

[0053] Step 4, spray the ethanol aqueous solution on the surface of polyvinyl chloride and let it stand for 40 minutes, then dry the polyvinyl chloride pellets in two gradients to obtain prefabricated polyvinyl chloride pellets;

[0054] Step 5, spraying cyclohexanone on the surface of the prefabricated polyvinyl chloride pellets, rolling a...

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Abstract

The invention discloses a preparation method of hydrophobic polyvinyl chloride granules, and the method comprises the following steps: adding polyvinyl chloride into cyclohexanone, and carrying out low-temperature ultrasonic treatment for 1-2 hours to obtain a dissolved solution; dissolving methyl trichlorosilane in toluene, uniformly stirring, and carrying out reduced pressure distillation to obtain a saturated silicon toluene solution; uniformly coating the dissolved solution on polyvinyl chloride granules, standing for 1-5 minutes to form a surface liquid film, and then spraying the silicontoluene solution on the surface liquid film to form polyvinyl chloride granules with a wet film; spraying an ethanol aqueous solution on the surface of polyvinyl chloride, standing for 30-50 minutes,and then carrying out second-gradient drying on the polyvinyl chloride granules to obtain prefabricated polyvinyl chloride granules; spraying cyclohexanone on the surfaces of the prefabricated polyvinyl chloride granules, and performing constant-temperature rolling and cooling to obtain the hydrophobic polyvinyl chloride granules. The method solves the problem that the existing hydrophobic polyvinyl chloride process is poor in practicability, and hydrophobic modification of the surfaces of polyvinyl chloride granules is realized by matching the solubility of the polyvinyl chloride with the polymerization stability of methyl silicone resin.

Description

technical field [0001] The invention belongs to the field of polyvinyl chloride, and in particular relates to a method for preparing hydrophobic polyvinyl chloride pellets. Background technique [0002] Polyvinyl chloride is a synthetic plastic resin formed by free radical polymerization of vinyl chloride monomer. Due to its special molecular structure characteristics, polyvinyl chloride has excellent flame retardancy, wear resistance, corrosion resistance, dielectric properties, sealing and other advantages. Polyvinyl chloride is widely used in flame-retardant plastic films, wire and cable pipes, disposable plastic packaging plastic products, drainage pipes, plastic toys, shopping bags, gloves, plastic wrap, artificial leather and other fields. [0003] Polyvinyl chloride (PVC) can be made into pipes, films, etc. However, PVC is easy to age, has poor thermal stability and impact performance, which greatly limits its application. With the migration of plasticizer on the s...

Claims

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Application Information

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IPC IPC(8): C08J3/12C08J9/28C08L27/06C08L83/04
CPCC08J3/126C08J9/286C08J2327/06C08J2427/06C08J2483/04C08J2201/0502
Inventor 顾友强管锡康
Owner WUXI JIAHONG PLASTICS TECH