Water-based composite slurry and preparation method thereof

A composite slurry, water-based technology, applied in pigment slurry, anti-fouling/underwater coating, climate sustainability, etc., can solve problems such as excess, poor wettability, and failure to flow normally

Active Publication Date: 2020-05-15
MEICHAO GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In traditional feeding, due to the small bulk density and poor wettability of diatomite, it is not easy to be quickly stirred into the mixture by the dispersing equipment, so it takes a long time for wetting and dispersing
When making diatomite slurry alone, the concentration of the prepared product will not exceed 20% because of the light porous characteristics, high oil absorption and high water absorption of diatomite itself, and strong thixotropy will appear if the concentration is increased. , unable to flow normally; and the use of low-concentration semi-finished slurry may lead to excess moisture and additives in the overall coating formulation, affecting the performance of the coating formulation
[0008] If different types of powder are compounded to prepare composite water-based semi-finished slurry, the investment in equipment can be reduced, and the problems of unbalanced output of a single slurry and low utilization of equipment can be solved.

Method used

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  • Water-based composite slurry and preparation method thereof
  • Water-based composite slurry and preparation method thereof
  • Water-based composite slurry and preparation method thereof

Examples

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preparation example Construction

[0063] The present invention also provides a method for preparing the water-based composite slurry described in the above-mentioned technical solution, comprising the following steps:

[0064] a) mixing water, wetting agent, pH regulator, defoamer, dispersant and thickener to obtain a mixed dispersant;

[0065] b) mixing and dispersing the mixed dispersant with diatomaceous earth and pigments and fillers to obtain a prefabricated mixed slurry;

[0066] c) mixing and dispersing the prefabricated mixed slurry and the anti-mildew bactericide to obtain an aqueous composite slurry.

[0067] Among them, the types, dosages and sources of water, wetting agents, pH regulators, defoamers, dispersants, thickeners, diatomaceous earth, pigments and fillers, and anti-mold and fungicides are all consistent with those described in the above technical solutions , which will not be repeated here.

[0068] Regarding step a): the mixing method is not particularly limited, and it is sufficient t...

Embodiment 1

[0075] 1.1 Formula:

[0076]

[0077] Among them, the diatomite is calcined diatomite CELITE 490 with a particle size of 20-40 μm; the particle size of the pigment and filler is 200-400 nm; the pH of the slurry system is above 8.

[0078] 1.2 Preparation

[0079] S1. Add water, wetting agent, pH regulator, defoamer, dispersant and thickener into a stainless steel container and mix to obtain a mixed dispersant.

[0080] S2. Turn on the disperser, adjust the initial speed to 500r / min, slowly add diatomaceous earth and pigments and fillers to the mixed dispersant in turn, after the addition, adjust the speed of the dispersant to 1200r / min, disperse at high speed for 20min, until the slurry is evenly mixed . Use the scraper fineness meter to test the fineness of the slurry, if it reaches ≤40μm, the test is qualified.

[0081] S3. Add anti-mold and fungicide to the slurry, adjust the speed of the disperser to 1000r / min, disperse for 10min until the slurry is evenly mixed, and...

Embodiment 2

[0083] 1.1 Formula:

[0084]

[0085] Among them, the diatomite is calcined diatomite MGZ-600 with a particle size of 20-40 μm; the particle size of the pigment and filler is 700 mesh; the pH of the slurry system is above 8.

[0086] 1.2 Preparation: Same as Example 1.

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Abstract

The invention provides water-based composite slurry and a preparation method thereof. The water-based composite slurry provided by the invention is composed of the following components in percentage by mass: 20-50% of water, 0.1%-1.0% of a wetting agent, 0.1%-0.5% of a pH adjusting agent, 0.05%-0.8% of a defoaming agent, 1%-5% of a dispersant, 0.2%-3% of a thickening agent, 0.1%-0.8% of a mildew-proof bactericide, 8%-15% of diatomite, 35%-60% of a pigment filler. The pigment filler is selected from one or more of titanium dioxide, calcium carbonate, barium sulfate, quartz powder and xiashi powder; the diatomite is calcined diatomite, and the particle size of the diatomite is 20-40 [mu]m; the pH value of the composite slurry is 8 or more. The diatomite is compounded with the pigment filler,and the wetting agent, the dispersing agent, the pH regulator, the defoamer, the thickener and the mildew-proof bactericide are matched, so that the slurry has excellent stability and flowability.

Description

technical field [0001] The invention relates to the technical field of slurry, in particular to an aqueous composite slurry and a preparation method thereof. Background technique [0002] Water-based architectural coatings are a type of material commonly used in the field of building materials. The production process is roughly as follows: mix water, additives, and pigments and fillers evenly, then grind and disperse them to the required fineness through mechanical equipment, and then mix them with film-forming materials and additives. After the mixing and dispersion are uniform and meet the design index requirements, a stable coating product will be formed. [0003] With the increase of labor cost and environmental protection pressure involved in the production of water-based architectural coatings, it is increasingly difficult to meet the requirements of the market and policies by the pure manual powder-feeding paint production mode; the disorderly discharge of dust during...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D17/00C09D5/14C09D7/61
CPCC09D17/008C09D17/004C09D5/14C09D7/61C09D7/70C08K7/26C08K2003/2241C08K2003/265C08K3/34Y02W30/91
Inventor 牛志强刘凤仙闪晓刚
Owner MEICHAO GROUP
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