Diatomite modified composite environment-friendly coating and preparation method thereof

A technology of environmentally friendly coatings and diatomite, which is applied in the direction of epoxy resin coatings, fireproof coatings, polyurea/polyurethane coatings, etc., can solve the problems of affecting flame retardant performance and uneven dispersion of flame retardants, so as to improve mechanical strength, Uniform flame retardant properties and improved adsorption capacity

Active Publication Date: 2019-06-28
广西弗士特资源综合利用有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The object of the present invention is to provide a composite environmental protection coating based on diatomite modification and its preparation method. Aluminum hydroxide flame retardant material is deposited in the pore structure of diatomite by co-precipitation method, and then the modified silicon The diatomaceous earth is foamed together with the polyurethane. Since the diatomite has a high dispersibility, it can be uniformly dispersed in the polyurethane, thereby making the prepared material uniform in flame retardancy. Flame retardant, so that the prepared foam material is filled with flame retardant to realize the flame retardant performance of the foam material, but directly adding the flame retardant will cause uneven dispersion of the flame retardant during the foaming process and affect its flame retardant performance problem

Method used

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  • Diatomite modified composite environment-friendly coating and preparation method thereof
  • Diatomite modified composite environment-friendly coating and preparation method thereof

Examples

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Effect test

Embodiment 1

[0026] The specific preparation process of polyurethane loaded diatomite material is as follows:

[0027] Step 1: Configure 1kg of aluminum chloride aqueous solution with a concentration of 25-27%, then add 85g of activated carbon powder to it, ultrasonically disperse for 5-10min, then add 420g of diatomaceous earth to the mixed solution, and continue ultrasonically dispersing for 30-40min, Then slowly add 813g of concentrated ammonia water with a concentration of 22%-25% to the solution dropwise, ultrasonicate while adding dropwise, and ultrasonically shake for 1-1.5h after the dropwise addition is complete, then filter, wash and dry to obtain modified diatomite ;

[0028] Step 2: 5.3kg modified diatomite prepared in step 1, 3.2kg polyether polyol, 3.8kg isocyanate, 0.1kg cell opening agent, 0.3kg water, 0.1kg o-xylene dibutyl ester, 0.05kg formazan After mixing base silicone oil and 0.05kg silane coupling agent, stir quickly, stop stirring when the viscosity of the material...

Embodiment 2

[0033] The specific preparation process of polyurethane loaded diatomite material is as follows:

[0034] Step 1: Configure 1kg of aluminum chloride aqueous solution with a concentration of 25-27%, then add 420g of diatomaceous earth to it, continue ultrasonic dispersion for 30-40min, and then slowly add 813g of it with a concentration of 22%-25% to the solution The concentrated ammonia water was added dropwise and ultrasonically, and after the dropwise addition was complete, ultrasonically oscillated for 1-1.5h, and then filtered, washed and dried to obtain modified diatomite;

[0035] Step 2: 5.3kg modified diatomite prepared in step 1, 3.2kg polyether polyol, 3.8kg isocyanate, 0.1kg cell opening agent, 0.3kg water, 0.1kg o-xylene dibutyl ester, 0.05kg formazan After mixing base silicone oil and 0.05kg silane coupling agent, stir quickly, stop stirring when the viscosity of the material increases rapidly, pour it into the mold and foam at room temperature, and put the mold a...

Embodiment 3

[0040] The specific preparation process of polyurethane loaded diatomite material is as follows:

[0041] Step 1: Mix 5.3kg diatomite, 0.2kg aluminum hydroxide, 3.2kg polyether polyol, 3.8kg isocyanate, 0.1kg cell opener, 0.3kg water, 0.1kg o-xylene dibutyl ester, 0.05kg methyl Silicone oil and 0.05kg silane coupling agent are mixed and then stirred rapidly. When the viscosity of the material increases rapidly, the stirring is stopped, poured into the mold and foamed at room temperature, until the volume of the product no longer increases, the mold is placed in an 80°C Insulate in oven for 9-10h, obtain composite material;

[0042] Step 2: Pulverize the composite material obtained in step 1 with a pulverizer, place the pulverized material in cold nitrogen for 3-5 minutes, take it out quickly, and then add it to grinding, and keep the content of cold nitrogen during the grinding process, Pass the ground particles through a 300-400 mesh sieve to obtain a polyurethane-loaded dia...

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Abstract

The invention discloses a diatomite modified composite environment-friendly coating which is prepared from the following components in parts by weight: 52-58 parts of bisphenol A epoxy resin, 23-25 parts of a branched flame-retardant curing agent, 31-34 parts of polyurethane loaded diatomite material, 1-2 parts of a flatting agent, 3-5 parts of a dispersant and 100 parts of ethanol. The preparation method comprises the following steps: depositing an aluminum hydroxide flame-retardant material in duct structures of diatomite by a coprecipitation method; and then jointly foaming modified diatomite and polyurethane. As diatomite has relatively high dispersity and can be uniformly dispersed in polyurethane, the prepared material is uniform in flame-retardant performance, and the problem that the flame-retardant performance is further affected as a flame retardant which is directly added into a foaming process in the prior art is not uniformly dispersed while the prepared foamed material isfilled with the flame retardant to achieve the flame-retardant performance of the foamed material is solved.

Description

technical field [0001] The invention belongs to the field of coating preparation, and relates to a diatomite-based composite environmental protection coating and a preparation method thereof. Background technique [0002] Polyurethane foaming materials are widely used in sound and heat insulation materials due to their high specific surface area, but the flame retardancy and tensile strength of polyurethane materials are low. In the existing technology, diatomite and polyurethane materials are co-foamed To prepare the foamed material, since the main component of diatomite is silicon dioxide, the strength of the foamed material is improved, and a flame retardant is added during the foaming process, so that the prepared foamed material is filled with a flame retardant, Realize the flame retardant performance of foamed materials, but directly adding flame retardants will cause uneven dispersion of flame retardants in the foaming process and affect its flame retardant performanc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D163/00C09D175/08C09D5/18
Inventor 不公告发明人
Owner 广西弗士特资源综合利用有限公司
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