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Rice hull ash and metakaolin based polymer composite fireproof paint and preparation method thereof

A technology of metakaolin and fireproof coatings, which is applied in the field of preparation of organic-inorganic composite materials, can solve the problems of poor weather resistance and water resistance, volatile toxic substances, and easy falling off of inorganic binders, and achieve stable performance and environmental protection. Not easy to fall off, simple preparation process

Active Publication Date: 2012-01-18
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The weather resistance and water resistance of inorganic binders are not good, and they are easy to fall off and pulverize; although organic binders have better performance, they are generally more expensive, and some organic substances will volatilize toxic substances when burned

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] (1) Take 283g of rice husk ash that was incinerated at 500°C for 2 hours;

[0019] (2) Take 199g of metakaolin produced by calcining at 600°C for 2 hours; add 20.2g of NaOH to 100g of water glass solution with a concentration of 29.2% and a modulus of 3.2, and add 29g of water to make water with a concentration of 30% and a modulus of 1.0 Glass solution; the two are mixed and added with 34.9g polyvinyl acetate emulsion, and stirred for 150 seconds to obtain an organic-inorganic composite binder;

[0020] (3) Mix 71g of magnesium hydroxide, 28g of titanium dioxide, 3.5g of sodium bentonite, 3.5g of sodium lignosulfonate, and 3.5g of γ-aminopropyltriethoxysilane with steps (1) and (2) Mix the products, add 31g of water, stir at a speed of 1000r / min for 0.5 hours, and obtain a composite fireproof coating after the mixture is uniform.

[0021] Apply the paint layer by layer to the gypsum board of 80mm×80mm×8mm. When painting, wait for the surface of the first coat to dry b...

Embodiment 2

[0024] (1) Take 371g of rice husk ash that was incinerated at 650°C for 3 hours;

[0025] (2) Take 156g of metakaolin produced by calcining at 900°C for 3 hours; add 15.3g of NaOH to 100g of water glass solution with a concentration of 29.2% and a modulus of 3.2, and add 2g of water to make water with a concentration of 35% and a modulus of 1.2 Glass solution; the two are mixed and added with 15g of polyvinyl acetate emulsion, and stirred for 150 seconds to obtain an organic-inorganic composite binder;

[0026] (3) Combine 66g magnesium hydroxide, 42g titanium dioxide, 4.1g sodium bentonite, 4.1g sodium lignosulfonate, 4.1g γ-aminopropyltriethoxysilane, 0.8g lignin fiber with steps (1) and Mix the products of step (2), add 45g of water, stir at a speed of 3000r / min for 0.5 hours, and obtain a composite fireproof coating after the mixture is uniform.

[0027] Apply the paint layer by layer to the gypsum board of 80mm×80mm×8mm. When painting, wait for the surface of the first c...

Embodiment 3

[0030] (1) Take 594g of rice husk ash that was incinerated at 750°C for 3 hours;

[0031] (2) Take 146g of metakaolin produced by calcining at 800°C for 4 hours; add 11.8g of NaOH to 100g of water glass solution with a concentration of 29.2% and a modulus of 3.2, evaporate 2.5g of water, and adjust the concentration to 35% and a modulus of 1.4 water glass solution; the two are mixed and added with 42g polyvinyl acetate emulsion, and stirred for 150 seconds to obtain an organic-inorganic composite binder;

[0032] (3) Combine 197g magnesium hydroxide, 47.5g titanium dioxide, 4.7g sodium bentonite, 4.7g sodium lignosulfonate, 5.9g γ-aminopropyltriethoxysilane, 5g lignin fiber with steps (1) and Mix the products of step (2), add 36g of water, stir at 3000r / min for 0.5 hours, and obtain a composite fireproof coating after the mixture is uniform.

[0033] Apply the paint layer by layer to the gypsum board of 80mm×80mm×8mm. When painting, wait for the surface of the first coat to d...

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Abstract

The invention discloses rice hull ash and metakaolin based polymer composite fireproof paint and a preparation method thereof. The paint mainly consists of rice hull ash and alkali-activated metakaolin based polymers. The preparation method comprises the steps that: rice hull ash is used as fillings with the mass parts being 20 to 50 mass parts; the alkali-activated metakaolin based polymers and polyvinyl acetate emulsion are compounded and prepared into adhesion agents with the mass parts being 20 to 40 mass parts; and other auxiliaries and special additives are added and mixed for preparingthe paint, wherein the auxiliaries and the special additives comprise the following ingredients in parts by mass: 0 to 10 parts of magnesium hydroxide, 4 to 8 parts of titanium pigment, 0.5 to 2 parts of sodium bentonite, 0.2 to 0.5 part of sodium lignosulphonate, 0.3 to 1 part of gamma-aminopropyl triethoxysilane and 0 to 5 parts of cellulose fibers. The paint and the preparation method have theadvantages that the raw material cost is low, in addition, the environment is protected, the preparation process is simple, and the bonding strength and the fireproof performance of products are good.

Description

technical field [0001] The invention belongs to the field of preparation of organic-inorganic composite materials, and in particular relates to a preparation method of a composite fireproof coating of rice husk ash and metakaolin base polymer. Background technique [0002] Along with the whole coatings industry, fireproof coatings are developing in the following directions: improving coating film quality, facilitating construction, saving resources, saving energy and adapting to the environment. Modern coatings often use fillers with different particle sizes mixed, such as perlite, expanded vermiculite and other mixed gradations, which increases the cost of grinding. As a new thermal insulation material, rice husk ash has good micro-aggregate filling effect and pozzolanic activity, small refiring line shrinkage, low high-temperature thermal conductivity, and light weight. As a big rice-producing country, my country is rich in rice husk resources, with an annual by-product o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00C04B18/10
CPCY02W30/91
Inventor 吴波段静
Owner SOUTH CHINA UNIV OF TECH
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