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Processing method of polyurethane finishing coat for chemical storage tank

A polyurethane topcoat and processing method technology, applied in polyurea/polyurethane coatings, coatings, etc., can solve the problems of non-foaming, poor weather resistance, and insufficient film thickness, and achieve good foaming and weather resistance Effect

Active Publication Date: 2014-04-30
MEGA P&C ADVANCED MATERIALS SHANGHAI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Existing foam-type heat-insulation coatings can have a certain heat-insulation effect, but they have the defect of poor weather resistance; existing non-foaming heat-insulation coatings have good weather resistance, but they cannot Foaming, often resulting in insufficient film thickness

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] In this embodiment, the weather-resistant polyester resin that can react with -NCO is selected from the special polyester resin (Desmophen 1652) produced by German Bayer company for automotive topcoats, and the vacuum microspheres are 3M vacuum microspheres and 3M hollow glass microspheres, which are weather-resistant Select Ciba 1130 additive produced by Ciba as the anti-pollution additive, BYK 3700 additive of the German BYK brand as the anti-pollution additive, fumed silica as the nano-additive, and propylene glycol as the environmentally friendly organic solvent for the preparation component and curing agent component. Methyl ether acetate, high weather resistance polyurethane curing agent chooses Bayer N3390 curing agent of German Bayer brand, and high flexibility polyurethane curing agent chooses Bayer N75 curing agent of German Bayer brand.

[0013] The processing method of the present embodiment comprises the following steps:

[0014] 1) Take 10 parts of weather...

Embodiment 2

[0019] In this embodiment, the weather-resistant polyester resin that can react with -NCO is selected from the special polyester resin (Desmophen 1652) produced by German Bayer company for automotive topcoats, and the vacuum microspheres are 3M vacuum microspheres and 3M hollow glass microspheres, which are weather-resistant Select Ciba 1130 additive produced by Ciba as the anti-pollution additive, BYK3700 additive of the German BYK brand as the anti-pollution additive, fumed silicon dioxide as the nano-additive, and propylene glycol as the environmentally friendly organic solvent for the preparation component and curing agent component. Methyl ether acetate, high weather resistance polyurethane curing agent chooses Bayer N3390 curing agent of German Bayer brand, and high flexibility polyurethane curing agent chooses Bayer N75 curing agent of German Bayer brand.

[0020] The processing method of the present embodiment comprises the following steps:

[0021] 1) Take 60 parts of...

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Abstract

The invention relates to a processing method of a polyurethane finishing coat for a chemical storage tank. The method comprises the following steps: 1) sequentially adding weather-resistant polyester resin, rutile titanium dioxide, inorganic filler, vacuum beads, a weather-resistant assistant, a pollution-preventing assistant, a nano additive, a dispersant, a defoamer, a rheological assistant, an anti-settling agent, a foaming catalyst and a flatting agent capable of being reacted with -NCO into a stirring vat, and dispersing and grinding to below 50 microns; 2) adjusting the viscosity of the matter obtained by the step 1) by an environment-friendly organic solvent, and then modulating color by a color paste to obtain a preparation component; 3) after mixing a highly weather-resistant polyurethane curing agent and a high flexibility polyurethane curing agent and placing for 1-5 hours at normal temperature, diluting to 60-90% by the environment-friendly organic solvent to obtain a curing agent component; and 4) mixing the preparation component and the curing agent component in a proportion of (1-3):1. The polyurethane finishing coat produced by the method provided by the invention has better foaming property, weather ability and heat-isolating and preserving effect.

Description

technical field [0001] The invention relates to the technical field of heat insulation and heat preservation of weather-resistant chemical storage tanks, in particular to a processing method for polyurethane topcoats used in chemical storage tanks. Background technique [0002] In summer, large-scale chemical storage tanks exposed to the outdoors will have the problem of excessive tank temperature, which is often solved by heat-insulating coatings. [0003] Existing foam-type heat-insulation coatings can have a certain heat-insulation effect, but they have the defect of poor weather resistance; existing non-foaming heat-insulation coatings have good weather resistance, but they cannot Foaming often results in insufficient paint film thickness. [0004] In the prior art, there is an urgent need for a method for processing polyurethane topcoats for chemical storage tanks with good foamability, weather resistance and thermal insulation properties. Contents of the invention ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/06C09D7/12C08G18/42
Inventor 仇大波刘正伟
Owner MEGA P&C ADVANCED MATERIALS SHANGHAI CO LTD
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