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A kind of sand-containing colored primer and its preparation method

A colored and primer technology, applied in the direction of paints, products and coatings containing biocides, can solve the problems of poor adhesion of the base layer, insufficient permeability, and many exterior wall renovation projects, so as to solve the sealing problem and eliminate the The effect of leaking bottom, improving permeability and adhesion

Active Publication Date: 2019-11-05
上海贝塔建筑科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

High performance clear primers do not provide coverage
[0008] (3) At present, there are many exterior wall renovation projects
Many exterior wall bases are pulverized. Due to the lack of permeability of conventional colored primers, the primer only forms a film on the surface of the putty and has poor adhesion to the base.

Method used

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  • A kind of sand-containing colored primer and its preparation method
  • A kind of sand-containing colored primer and its preparation method
  • A kind of sand-containing colored primer and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] This embodiment mainly selects fine sand as the main filler in the sand-containing primer.

[0032] In order to solve the problem that the surface of the primer film is too smooth, it is necessary to add coarse particle fillers to the formula. In the present invention, 40-80 mesh snowflakes, 80-120 mesh snowflakes, and 120-180 mesh snowflakes are added as fillers to the formula for comparative testing:

[0033] The test results are shown in Table 1.

[0034] Table 1 Contrast test of snowflake white fine sand with different particle sizes as filler

[0035]

[0036] Through the evaluation of the test items shown in Table 1, it is found that snowflake white with a particle size of 80-120 mesh can solve the problem that the textured construction sand of the surface layer is easy to roll, and its own construction performance is good.

Embodiment 2

[0038] In order to solve the problem of uneven primer roller coating, the primer must have color. Therefore, when evaluating polymer emulsions, in addition to conventional anti-efflorescence and anti-salting-out properties, it is also necessary to consider its ability to carry pigments and have better color development. The present invention selects 3 commonly used emulsions on the market for evaluation, and the formulations in Table 2 are used for batching when evaluating:

[0039] Table 2 Emulsion Evaluation Formulation

[0040] raw material name Content (parts by mass) water 171 preservative 2.5 D 1 Dispersant 3.5 Propylene Glycol 30 Defoamer 1 Rutile Titanium Dioxide 60 800 mesh heavy calcium 30 80-120 mesh snow white 250 dodecyl alcohol ester 12 Cellulose 1 lotion 435 antifungal agent 2 total 1000

[0041] Test and evaluate the primer paint materials obtained according to t...

Embodiment 3

[0048] The primer needs to solve the problem of sealing the pulverized base. It has excellent permeability and can penetrate deep into the pulverized base, so the viscosity should not be too high. However, due to the 80-120 mesh snowflake white sand in the primer, if the viscosity is insufficient, it is easy to cause precipitation. Therefore, the thickening system should take both permeability and anti-sedimentation into account. Based on these two requirements, the present invention selects the following thickening systems with different thickening mechanisms. The test formula is listed in Table 4:

[0049] Table 4 thickening system selection test formula

[0050]

[0051]

[0052] The obtained sand-containing colored primer paint according to the formula of Table 4 is tested, and the test results are shown in Table 5:

[0053] Table 5 Test results of different thickening systems

[0054]

[0055] Among them, the test method for the permeability of powdered base ...

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Abstract

The invention provides a formula of a building exterior-wall water-based paint, namely a sand-containing colored priming paint and its preparation technology. The sand-containing colored priming paint contains 140-170 parts of water, 0.5-4 parts of a preservative, 0.5-3 parts of a wetting agent, 1-3 parts of a mildew inhibitor, 1.5-5 parts of a dispersant, 25-35 parts of propylene glycol, 0.5-2 parts of an antifoaming agent, 2-4 parts of a thickening agent, 0.5-2 parts of cellulose, 50-70 parts of titanium dioxide, 20-40 parts of heavy calcium, 200-300 parts of snowflake white, 8-15 parts of 2,2,4-trimethyl-1,3-pentanediol monoisobutyrate, 0.5-2 parts of ammoniacal liquor, 380-500 parts of an emulsion and 5-15 parts of silica sol. The film of the priming paint contains sand, and the surface of the film is rough. Thus, the problem of sand loss that easily happens to construction of a textured paint on a smooth surface is solved. The sand-containing colored priming paint can be color-adjustable so that the problem of bottom exposure and floating due to poor covering power of a textured paint on the surface course can be completely eradicated. Through matching of a unique thickening system and selection of silica sol, permeability and adhesive force of the sand-containing colored priming paint are greatly improved, and the sealing problem of a powdered base is solved.

Description

technical field [0001] The invention belongs to the technical field of water-based coatings for buildings, in particular to a sand-containing colored primer and a preparation method thereof. Background technique [0002] At present, in the water-based architectural coating system for exterior walls, in order to meet the requirements of anti-efflorescence and anti-salting out, a special primer is required. There are two commonly used water-based primers: [0003] (1) Colored primer: In exterior wall decoration, the decorative color is light-colored paint, because the amount of color paste is small, the hiding power is often very low, and the most common situation is that the bottom is exposed and blooming. Therefore, in the construction of exterior walls, the color of the primer is often adjusted to a color close to that of the topcoat, and the colored primer will play the role of providing hiding power and sealing the bottom layer. [0004] (2), transparent primer: the adv...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D127/24C09D5/14C09D5/00C09D7/43
CPCY02P20/141
Inventor 姚伟陈勇
Owner 上海贝塔建筑科技有限公司
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