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Organic montmorillonoid modified elastic paint for protecting concrete surface and preparation method thereof

A concrete surface, organic montmorillonite technology, applied in antifouling/underwater coatings, coatings, paints containing biocides, etc., can solve the problems of carbonization, concrete crack leakage, etc., to improve stain resistance and weather resistance properties, improving carbonation resistance, increasing molecular cohesion and tensile properties

Active Publication Date: 2016-06-29
江苏道成不锈钢管业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problems of concrete crack leakage and carbonization, the invention provides a kind of organic montmorillonite modified elastic coating for concrete surface protection and its preparation method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] 1) Preparation of organic montmorillonite O-MMT: Take 50g Na-MMT in a 2L three-necked flask, add 600g water, stir and heat to 80°C for 30min, then add 10.78g (70meq / 100g) dodecyl trimethyl ammonium bromide and 150 g of aqueous dispersion. Keep it warm for 12 hours, wash it 10 times by precipitation method, dry it at 80°C and grind it finely, then pass it through a 200-mesh sieve to obtain organically modified montmorillonite.

[0046] 2) Organic montmorillonite modified core-shell acrylic emulsion: 53.3g of methyl methacrylate, 100.7g of butyl acrylate, 3.1g of acrylic acid, and 2.3g of diacetone acrylamide were uniformly mixed to obtain a core mixed monomer. 75.8 g of methyl methacrylate, 78.2 g of butyl acrylate, 3.1 g of acrylic acid, and 2.3 g of diacetone acrylamide were uniformly mixed to obtain a shell mixed monomer. Get 63.8g nuclear mixed monomer and 3.2g machine-modified montmorillonite O-MMT mix homogeneously, after ultrasonic 2h, leave standstill 24h, make ...

Embodiment 2

[0049] 1) Preparation of organic montmorillonite O-MMT: Take 50g Na-MMT in a 2L three-necked flask, add 600g water, stir and heat to 80°C for 30min, then add 9.2g (70meq / 100g) dodecyl trimethyl ammonium chloride and 150 g of aqueous dispersion. Keep it warm for 12 hours, wash it 10 times by precipitation method, dry it at 80°C and grind it finely, then pass it through a 200-mesh sieve to obtain organically modified montmorillonite.

[0050] 2) Organic montmorillonite-modified core-shell acrylic emulsion: 48.3g of methyl methacrylate, 105.7g of butyl acrylate, 3.1g of acrylic acid, and 2.3g of diacetone acrylamide were uniformly mixed to obtain a core mixed monomer. 71.5 g of methyl methacrylate, 82.5 g of butyl acrylate, 3.1 g of acrylic acid, and 2.3 g of diacetone acrylamide were uniformly mixed to obtain a shell mixed monomer. Get 63.8g nuclear mixed monomer and 3.2g machine-modified montmorillonite O-MMT mix homogeneously, after ultrasonic 2h, leave standstill 24h, make n...

Embodiment 3

[0053] 1) Preparation of organic montmorillonite O-MMT: Take 50g of Na-MMT in a 2L three-necked flask, add 600g of water, stir and heat to 80°C for 30min, then continue to add 12.7g (70meq / 100g) hexadecyl trimethyl ammonium bromide and 150 g of aqueous dispersion. Keep it warm for 12 hours, wash it 10 times by precipitation method, dry it at 80°C and grind it finely, then pass it through a 200-mesh sieve to obtain organically modified montmorillonite.

[0054] 2) Organic montmorillonite modified core-shell acrylic emulsion: 43.2g of methyl methacrylate, 110.8g of butyl acrylate, 3.1g of acrylic acid, and 2.3g of diacetone acrylamide were uniformly mixed to obtain a core mixed monomer. 67.2 g of methyl methacrylate, 86.8 g of butyl acrylate, 3.1 g of acrylic acid, and 2.3 g of diacetone acrylamide were uniformly mixed to obtain a shell mixed monomer. Get 63.8g nuclear mixed monomer and 3.2g machine-modified montmorillonite O-MMT mix homogeneously, after ultrasonic 2h, leave st...

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Abstract

The invention provides organic montmorillonoid modified elastic paint for protecting concrete surface and a preparation method thereof. The organic montmorillonoid modified elastic paint comprises 20-40% of organic montmorillonoid modified core-shell acrylic emulsion, 25-35% of pigment filler, 0.01-0.1% of PH regulator, 0.1-1.0% of cross-linking agent, 0.3-1% of dispersant, 0-1% of film forming auxiliary, 0.3-1% of antifreezing agent, 0.3-1% of defoamer, 0.3-1% of thickener, 0.1-0.2% of bactericide and the balance of water. Current elastic paint puts main emphasis on stain resistance of the elastic paint, and seldom relates to the aspects of carbonization resistance and aging resistance. The acrylic acid elastic paint has elastic crack resistance and has the advantages of being resistant to after-tack, stain, carbonization and aging.

Description

technical field [0001] The invention relates to an organic montmorillonite modified elastic paint used for concrete surface protection and a preparation method thereof. Background technique [0002] When the concrete is hardened, hardening cracks due to volume reduction; temperature cracks due to thermal expansion and contraction when the temperature changes; dry shrinkage cracks due to wet expansion and contraction when the dryness changes in sunny and rainy days; winter rainwater When the wall freezes and thaws, freeze-thaw cracks are generated due to the expansion of the frozen water volume; structural cracks are generated when the foundation subsides, which leads to cracks in the protective decorative coating on the concrete surface, and rainwater and air leak into the wall with the cracks, deepening the damage Damage to buildings, such as corrosion of steel bars and carbonation of concrete, endanger buildings. Since the elastic coating maintains high elasticity, toug...

Claims

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Application Information

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IPC IPC(8): C09D133/08C09D7/12C09D5/16C08F220/18C08F220/14C08F220/06C08F220/58C08F2/26C08F2/30
CPCC08F2/26C08F2/30C08F220/18C08F220/1804C08K3/346C08K9/04C09D5/16C09D7/62C09D133/08C08F220/14C08F220/06C08F220/58
Inventor 蒋永菁李磊王洪松王瑞田倩
Owner 江苏道成不锈钢管业有限公司
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