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Preparation method of hydrophobic polyvinyl chloride

A polyvinyl chloride board, hydrophobic technology, applied in the field of plastics, to achieve the effect of reducing the difficulty of penetration

Inactive Publication Date: 2020-06-30
SHAOXING UNIVERSITY
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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 method for preparing a hydrophobic polyvinyl chloride board, which solves the difficulties of the existing hydrophobic polyvinyl chloride process, and forms a hydrophobic surface layer structure on the surface of polyvinyl chloride by using the infiltration method without large The overall process of polyvinyl chloride has been greatly changed

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0016] A method for preparing a hydrophobic polyvinyl chloride plate, comprising the steps of:

[0017] Step 1, add ethyl acetate to absolute ethanol and stir evenly at low temperature to form an alcohol ester mixture; the volume ratio of ethyl acetate to absolute ethanol is 1:3-7, and the temperature of low temperature stirring is 10-20 ℃, the stirring speed is 1000-2000r / min; ethyl acetate and absolute ethanol can form miscibility to achieve a good dissolution effect, and the way of low temperature stirring can effectively inhibit the volatilization of absolute ethanol and ethyl acetate, forming a stable the mixture;

[0018] Step 2, evenly spray the alcohol ester mixture on the polyvinyl chloride plate and let it stand for 20-40 minutes, then spray toluene on the surface, and let it stand for 20-40 minutes at a constant temperature to obtain a polyvinyl chloride plate with a liquid film; the spraying of the uniform spraying The volume is 5-8mL / min, and the standing tempera...

Embodiment 1

[0022] A method for preparing a hydrophobic polyvinyl chloride plate, comprising the steps of:

[0023] Step 1: Add ethyl acetate to absolute ethanol and stir evenly at low temperature to form a mixture of alcohol esters; the volume ratio of ethyl acetate to absolute ethanol is 1:3, the temperature of low temperature stirring is 10°C, and the stirring speed 1000r / min;

[0024] Step 2, evenly spray the alcohol ester mixture on the polyvinyl chloride plate and let it stand for 20 minutes, then spray toluene on the surface, and let it stand for 20 minutes at a constant temperature to obtain a polyvinyl chloride plate with a liquid film; the spraying amount of the uniform spray is 5mL / min, the standing temperature is 2°C; the amount of toluene sprayed is 10mL / cm 2 , the temperature of standing at constant temperature is 80°C;

[0025] Step 3: Spray the dichlorodimethylsilane liquid evenly on the surface of the polyvinyl chloride board, and let it stand at a constant temperature...

Embodiment 2

[0029] A method for preparing a hydrophobic polyvinyl chloride plate, comprising the steps of:

[0030] Step 1: Add ethyl acetate to absolute ethanol and stir evenly at low temperature to form an alcohol ester mixture; the volume ratio of ethyl acetate to absolute ethanol is 1:7, the temperature of low temperature stirring is 20°C, and the stirring speed 2000r / min;

[0031] Step 2, evenly spray the alcohol ester mixture on the polyvinyl chloride plate and let it stand for 40 minutes, then spray toluene on the surface, and leave it at a constant temperature for 40 minutes to obtain a polyvinyl chloride plate with a liquid film; the spraying amount of the uniform spray is 8mL / min, the standing temperature is 10°C; the amount of toluene sprayed is 20mL / cm 2 , the temperature of standing at constant temperature is 90°C;

[0032]Step 3: Spray the dichlorodimethylsilane liquid evenly on the surface of the polyvinyl chloride board, and let it stand at constant temperature for 4 ho...

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Abstract

The invention belongs to the field of plastics, relates to polyvinyl chloride, and in particular, relates to a preparation method of hydrophobic polyvinyl chloride, wherein the preparation method comprises the following steps: step 1, adding ethyl acetate into absolute ethyl alcohol, and uniformly stirring at low temperature to form an alcohol-ester mixed solution; step 2, uniformly spraying the alcohol-ester mixed solution on a polyvinyl chloride plate, standing for 20-40 min, then spraying methylbenzene on the surface, and standing for 20-40 min at a constant temperature, so as to obtain a polyvinyl chloride plate with a liquid film; step 3, uniformly spraying a dichlorodimethylsilane liquid onto the surface of the polyvinyl chloride plate, and standing for 2-4 h at a constant temperature to obtain a mixed film polyvinyl chloride plate; and step 4, spraying distilled water to the surface of the polyvinyl chloride plate, standing for 2-4 h, then carrying out two-gradient heating and drying, and cooling to obtain a hydrophobic polyvinyl chloride plate. According to the invention, the difficulties of an existing hydrophobic polyvinyl chloride process are solved, a hydrophobic surface structure is formed on the surface of polyvinyl chloride by using a permeation method, and the overall process of polyvinyl chloride does not need to be greatly changed.

Description

technical field [0001] The invention belongs to the field of plastics and relates to polyvinyl chloride, in particular to a method for preparing hydrophobic polyvinyl chloride. Background technique [0002] PVC film has excellent flame retardancy, abrasion resistance, chemical corrosion resistance, transparency and barrier properties, and is widely used in industry, construction, agriculture, daily life, packaging, electric power, public utilities and other fields , has become one of the most widely used plastic film varieties. All PVC films currently on the market have a contact angle with water generally less than 100°. [0003] In recent years, superhydrophobic materials with water contact angles larger than 150° have attracted extensive attention. The typical characteristics of superhydrophobic materials are: liquids such as water droplets and sewage are usually spherical on the surface of superhydrophobic materials, and it is difficult for liquids to remain stably on ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J7/16C08J7/02C08L27/06
CPCC08J7/02C08J7/16C08J2327/06C08J2483/04
Inventor 刘伟
Owner SHAOXING UNIVERSITY
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