Preparation method of PVC (polyvinyl chloride) waterproof coating

A waterproof coating and preparation process technology, applied in the direction of epoxy resin coating, coating, etc., can solve the problems of uneven fusion and dispersion, affecting performance, low thermal stability and anti-aging performance of polyvinyl chloride, and achieve uniform hydrophobicity, The effect of high adhesive performance and simple coating process

Active Publication Date: 2019-07-23
辽宁恒智科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a kind of preparation method of PVC waterproof coating, through alkoxy graft polyvinyl chloride and fluorinated epoxy resin directly carry out curing cross-linking action, make branched polyvinyl chloride and fluorinated epoxy resin Curing and cross-linking into a network structure, so that nano-titanium dioxide is wrapped in it, and better fixation of nano-titanium dioxide can be achieved. At the same time, alkoxy and fluorine functional groups are evenly distributed on the network structure, making the coating uniformly hydrophobic, Anti-aging and thermal stability, solve the problem of mixing polyvinyl chloride and modifier directly through the melt mixing method in the prior art, due to the interfacial tension between polyvinyl chloride and modifier, resulting in uneven fusion and dispersion, and then Affects the improved performance, making the thermal stability and anti-aging performance of the modified PVC still low

Method used

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  • Preparation method of PVC (polyvinyl chloride) waterproof coating
  • Preparation method of PVC (polyvinyl chloride) waterproof coating
  • Preparation method of PVC (polyvinyl chloride) waterproof coating

Examples

Experimental program
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Effect test

Embodiment 1

[0030]The concrete preparation process of branched graft modifier is as follows:

[0031] ①Put 3.02kg of trimethylolpropane triglycidyl ether into the reaction kettle, cool down to 5-10°C, add 0.57kg of allylamine dropwise, stir for 3-4 hours, then heat up to 30-35°C for reaction 1- 1.5h, a colorless and transparent solution was obtained;

[0032] ②Add 2.21kgr-aminopropyltriethoxysilane to the reaction kettle in step ①, raise the temperature to 80-90℃ and stir and reflux for 9-10h, then lower it to room temperature and add 0.66kg of ethylenediamine to the reaction kettle, keep the temperature After reflux for 4-5 hours, the product was distilled under reduced pressure to obtain a branched graft modifier.

Embodiment 2

[0034] The concrete preparation process of branched graft modifier is as follows:

[0035] ①Put 3.02kg of trimethylolpropane triglycidyl ether into the reaction kettle, cool down to 5-10°C, add 0.57kg of allylamine dropwise, stir for 3-4 hours, then heat up to 30-35°C for reaction 1- 1.5h, a colorless and transparent solution was obtained;

[0036] ②Add 1.77kgr-aminopropyltriethoxysilane to the reaction kettle in step ①, raise the temperature to 80-90℃ and stir and reflux for 9-10h, then lower it to room temperature and add 0.78kg of ethylenediamine to the reaction kettle, keep the temperature After reflux for 4-5 hours, the product was distilled under reduced pressure to obtain a branched graft modifier.

Embodiment 3

[0038] The concrete preparation process of branched graft modifier is as follows:

[0039] ①Put 3.02kg of trimethylolpropane triglycidyl ether into the reaction kettle, cool down to 5-10°C, add 0.57kg of allylamine dropwise, stir for 3-4 hours, then heat up to 30-35°C for reaction 1- 1.5h, a colorless and transparent solution was obtained;

[0040] ②Add 2.43kgr-aminopropyltriethoxysilane to the reaction kettle of step ①, raise the temperature to 80-90℃ and stir and reflux for 9-10h, then lower it to room temperature and add 0.66kg of ethylenediamine to the reaction kettle, keep the temperature constant After reflux for 4-5 hours, the product was distilled under reduced pressure to obtain a branched graft modifier.

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PUM

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Abstract

The invention discloses a preparation method of a PVC (polyvinyl chloride) waterproof coating. The preparation method comprises the specific preparation process as follows: prepared branched PVC and absolute ethyl alcohol are added to a stirring reactor, meanwhile, nano-titania, a plasticizer and a defoaming agent are added, the mixture is stirred and mixed uniformly, main slurry is obtained, prepared fluorinated epoxy resin powder is added to the main slurry, the main slurry is stirred to react at 40-45 DEG C for 40 min, and viscous slurry, namely, the PVC waterproof coating, is obtained. Alkoxyl-grafted PVC is directly cured and crosslinked with fluorinated epoxy resin, so that the branched PVC and the fluorinated epoxy resin are cured and crosslinked into a net structure, nano-titinia is wrapped in the net structure and can be better fixed, meanwhile, alkoxy and fluorine functional groups are uniformly distributed on the net structure, and the coating has uniform hydrophobic property, aging resistance and thermal stability.

Description

technical field [0001] The invention belongs to the field of paint preparation and relates to a preparation method of PVC waterproof paint. Background technique [0002] Polyvinyl chloride has excellent acid resistance, alkali resistance, corrosion resistance, high hydrophobicity, high mechanical properties and strong electrical insulation properties, and is widely used in the protection of the surface of the board. Poor resistance, hydrogen chloride begins to decompose at 150 ° C, and adverse reactions occur with the amount of plasticizer content, so modifiers are usually added during processing and use to improve its thermal stability and anti-aging performance. [0003] In the preparation process of existing polyvinyl chloride coatings, polyvinyl chloride is usually polymerized and modified and then melt-mixed with anti-aging agents and heat stabilizers to make coatings. There is interfacial tension between polyvinyl chloride and modifiers, resulting in Inhomogeneous fus...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D163/00C09D127/22C09D7/61C09D7/20C08G59/14C08F114/06C08F8/42C08F8/32
CPCC08F8/32C08F8/42C08G59/1455C08K2003/2241C08K2201/011C08L2201/08C08L2312/00C09D163/00C09D7/20C09D7/61C08L27/22C08K3/22C08F114/06
Inventor 何文霞
Owner 辽宁恒智科技发展有限公司
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