CN102675938A - Hydrophobic silicate fireproof coating and preparation method thereof - Google Patents

Abstract

A kind of hydrophobic silicate fireproof coating and preparation method thereof, described a kind of hydrophobic silicate fireproof coating, is made up of A, B, C, and the mass ratio of described A, B, C is 1:(0.1～ 0.3): (0.2～0.4); the mass parts of each component in the described A are: 60～80 parts of water glass, 15～20 parts of deionized water, 15～65 parts of filler, 0.8～1.5 parts of dispersant, 0.5 to 1 part of polyvinyl alcohol; the mass parts of each component in B are: 60 to 80 parts of ethyl orthosilicate, 15 to 30 parts of modified organosilane, and 1 to 10 parts of condensation agent; The mass parts of each component are: 70-90 parts of nano-alumina, and 10-30 parts of aluminum dihydrogen phosphate. When using, mix components A, B, and C according to certain proportions and steps, and stir evenly to obtain a hydrophobic silicate fireproof coating. The coating of the invention has the advantages of water repellency, fire prevention, high temperature resistance, etc., and can be applied to the coating of wood-based, metal-based and other materials.

Description

A kind of hydrophobic silicate fireproof coating and preparation method thereof

technical field

The invention relates to a coating, in particular to a hydrophobic silicate fireproof coating and a preparation method thereof. the

Background technique

"Water and fire are ruthless." Fire is a common catastrophic problem faced by the whole world, which has caused huge loss of life and property to human society. Inorganic coatings have excellent fire resistance, air permeability, pollution resistance and excellent comprehensive environmental protection performance. As people have more and more stringent requirements on the fire resistance and environmental protection of architectural coatings, it has become a new trend to vigorously develop inorganic fireproof coatings. the

Fire retardant coatings were first developed from inorganic fire retardant coatings. In foreign countries, water-based fireproof coatings have been used very early. In the early 20th century, there were inorganic fireproof coatings with water glass as binder and minerals as fillers. The fireproof coating based on water glass can produce a silicate foam insulation layer in case of fire, which has the advantages of good flame retardant effect and no toxic gas, but because of its poor water resistance, the coating is easy to fall off after soaking in water and limit its use. In order to improve its water resistance, methods such as acid modification, compounding with organic membranes, and cross-linking curing modification are usually used, but there are disadvantages such as high curing temperature, poor stability, easy layering of coatings, and short storage time. In addition, the coating with water glass as the base material has high hardness and high brittleness, and its coating film is easy to crack. Therefore, how to improve the water resistance, flexibility and film-forming properties of fire-resistant coatings based on water glass has become a key issue for inorganic silicate coatings. the

Contents of the invention

The technical problem solved by the present invention is to provide a kind of hydrophobic silicate fireproof coating and its preparation method. A hydrophobic silicate fireproof coating was prepared by using fillers and additives. Applying the paint to wood-based materials and metal materials can not only improve the fireproof performance of the material, but also improve the hydrophobic performance of the material. the

The technical problem solved by the present invention adopts following technical scheme to realize:

A kind of hydrophobic silicate fireproof coating, is made up of A, B, C, and the mass ratio of described A, B, C is 1:(0.1～0.3):(0.2～0.4);

The parts by mass of each component in A are: 60-80 parts of water glass, 15-20 parts of deionized water, 15-65 parts of filler, 0.8-1.5 parts of dispersant, and 0.5-1 part of polyvinyl alcohol;

The parts by mass of the components in B are: 60-80 parts of ethyl orthosilicate, 15-30 parts of modified organosilane, and 1-10 parts of condensing agent;

The parts by mass of the components in C are: 70-90 parts of nano-alumina, and 10-30 parts of aluminum dihydrogen phosphate.

The modulus of the water glass is 3.2-3.6. the

The filler is one or a mixture of diatomite, mica powder, kaolin, sepiolite powder and talcum powder. the

The modified organosilane is one or more of octadecyltriethoxysilane, dodecyltriethoxysilane, phenyltriethoxysilane, vinyltriethoxysilane mixture. the

The condensing agent is one of ammonia water and adipic acid. the

A preparation method of hydrophobic silicate fireproof coating, is characterized in that, comprises the following steps:

(1) Add dispersant, polyvinyl alcohol and filler in deionized water in sequence, grind and mix with a colloid mill, and then add water glass to grind and mix, that is component A, ready for use;

(2) Mix ethyl orthosilicate, modified organosilane, and condensing agent evenly, which is component B, which is ready for use;

(3) Add nano-alumina to the aluminum dihydrogen phosphate solution, grind and mix with a colloid mill, that is, component C, ready for use;

(4) Mix A, B, and C evenly to obtain a hydrophobic silicate fireproof coating.

Beneficial effect:

The preparation method of the invention is simple, and the coating of the invention has the advantages of water repellency, fire prevention, high temperature resistance, etc., and can be applied to the coating of wood-based, metal-based and other materials.

Detailed ways

In order to make it easy to understand the technical means, creative features, work flow, and use methods of the present invention to achieve the purpose and effect, the present invention will be further elaborated below. the

The parts in the following examples are all parts by mass. the

Example 1

Step 1: Weigh 18 parts of deionized water, add 1 part of dispersant, 0.8 parts of polyvinyl alcohol in sequence, then add 10.2 parts of sepiolite powder, stir evenly, grind and mix with a colloid mill at a speed of 1000 rpm, and then add 70 parts The modulus is 3.2 water glass, stir well, it is component A, ready to use; Step 2: Take 75 parts of ethyl orthosilicate, 23 parts of octadecyltriethoxyorganosilane, and 2 parts of ammonia solution and mix well , which is component B, for use; step three: take 20 parts of aluminum dihydrogen phosphate solution, add 80 parts of nano-alumina, grind and mix with a colloid mill, that is component C, for use; step four: mix A, The three components of B and C are mixed evenly according to the mass ratio of 1: 0.15: 0.25, and then coated on the surface-treated wood base, metal base and other materials.

Example 2

Step 1: Weigh 10 parts of deionized water, add 1.0 parts of dispersant, 0.5 parts of polyvinyl alcohol in sequence, then add 5.5 parts of sepiolite powder, stir evenly, grind and mix with a colloid mill at a speed of 1000 rpm, and then add 83 parts The modulus is 3.0 water glass, stir well, it is component A, and it is ready for use; Step 2: Take 70 parts of ethyl orthosilicate, 25 parts of octadecyl triethoxyorganosilane, and 5 parts of adipic acid and mix Evenly, it is component B, ready for use; Step 3: Take 30 parts of aluminum dihydrogen phosphate solution, add 70 parts of nano-alumina, grind and mix with a colloid mill, that is component C, ready for use; Step 4: Mix A The three components of , B, and C are mixed evenly according to the mass ratio of 1: 0.10: 0.25, and then coated on the surface-treated wood base, metal base and other materials.

Example 3

Step 1: Weigh 18 parts of deionized water, add 1.2 parts of dispersant, 0.8 parts of polyvinyl alcohol in sequence, then add 8.0 parts of kaolin powder, stir evenly, grind and mix with a colloid mill at a speed of 1000 rpm, and then add 72 parts of mold The number is 3.0 water glass, stir evenly, it is component A, and it is ready for use; Step 2: Take 70 parts of ethyl orthosilicate, 25 parts of phenyltriethoxyorganosilane, and 5 parts of adipic acid and mix evenly, that is It is component B, ready for use; Step 3: Take 30 parts of aluminum dihydrogen phosphate solution, add 70 parts of nano-alumina, grind and mix with a colloid mill, that is component C, ready for use; Step 4: Combine A, B, The three components of C are mixed evenly in a mass ratio of 1: 0.20: 0.30, and then coated on the surface-treated wood base, metal base and other materials.

Example 4

Step 1: Weigh 15 parts of deionized water, add 1.0 parts of dispersant, 1.0 parts of polyvinyl alcohol in sequence, then add 8.0 parts of diatomite powder, stir evenly, grind and mix with a colloid mill at a speed of 1000 rpm, and then add 75 Part modulus is 3.0 water glass, stir evenly, it is component A, stand-by; Step 2: Take 70 parts of ethyl orthosilicate, 28 parts of phenyltriethoxyorganosilane, 2 parts of ammonia solution and mix well, That is component B, ready for use; Step 3: Take 20 parts of aluminum dihydrogen phosphate solution, add 80 parts of nano-alumina, grind and mix with a colloid mill, that is component C, ready for use; Step 4: Combine A, B The three components of C and C are mixed evenly according to the mass ratio of 1: 0.15: 0.30, and then coated on the surface-treated wood base, metal base and other materials.

The basic principles, main features and advantages of the present invention have been shown and described above. Those skilled in the industry should understand that the present invention is not limited by the above-mentioned embodiments. What are described in the above-mentioned embodiments and the description only illustrate the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will also have Variations and improvements are possible, which fall within the scope of the claimed invention. The protection scope of the present invention is defined by the appended claims and their equivalents. the

Claims (6)

1. a hydrophobicity silicate frie retardant coating is characterized in that, is made up of A, B, C, and the mass ratio of said A, B, C is 1: (0.1～0.3): (0.2～0.4);

The mass fraction of each component is among the said A: 60～80 parts of water glass, 15～20 parts of deionized waters, 15～65 parts of fillers, 0.8～1.5 part of dispersion agent, 0.5～1 part of Z 150PH;

The mass fraction of each component is among the said B: 60～80 parts of tetraethoxys, 15～30 parts in modified organic silicon alkane, 1～10 part of condensing agent;

The mass fraction of each component is among the said C: 70～90 parts of nano aluminium oxides, 10～30 parts of aluminium dihydrogen phosphates.

2. a kind of hydrophobicity silicate frie retardant coating according to claim 1 is characterized in that described water glass modulus is 3.2～3.6.

3. a kind of hydrophobicity silicate frie retardant coating according to claim 1 is characterized in that, described filler is one or several the mixture in zeyssatite, mica powder, kaolin, sepiolite powder, the talcum powder.

4. a kind of hydrophobicity silicate frie retardant coating according to claim 1; It is characterized in that described modified organic silicon alkane is one or several the mixture in octadecyltriethoxy silane, dodecyl triethoxyl silane, phenyl triethoxysilane, the vinyltriethoxysilane.

5. a kind of hydrophobicity silicate frie retardant coating according to claim 1 is characterized in that, described condensing agent is a kind of in ammoniacal liquor, the hexanodioic acid.

6. the preparation method of a hydrophobicity silicate frie retardant coating is characterized in that, may further comprise the steps:

(1) dispersion agent, Z 150PH and filler are added in the deionized water successively, use the colloidal mill ground and mixed, add the water glass ground and mixed then, be the A component, for use;

(2) tetraethoxy, modified organic silicon alkane, condensing agent are mixed, be the B component, for use;

(3) nano aluminium oxide is added in the phosphate dihydrogen aluminum solution, use the colloidal mill ground and mixed, be the C component, for use;

(4) A, B, C are mixed promptly get a kind of hydrophobicity silicate frie retardant coating.