CN1422921A - Anticorrosive water-proof coating material and preparation method thereof - Google Patents

Abstract

The invention provides an anti-corrosion and waterproof elastic coating material and a preparation method thereof. The weight percent content of each component of the material is: 10-30% of hydrophobic polymer with polar groups, 5-20% of elastic polymer, 20-30% of pigment and filler, 5-20% of solvent, and 10% of propellant. ~30% and crosslinking agent 0.1~0.5%. First, dissolve the hydrophobic polymer and elastic polymer with polar groups in the solvent; then mix one-third of the obtained product with pigments and fillers, stir at high speed for 10-20 minutes, and then three-thirds of the obtained product Mix two-thirds with the mixture of pigment and filler, stir at low speed for 20-40 minutes; put the cross-linking agent into the above mixture, stir for 20-30 minutes at medium speed; finally add propellant and seal to obtain this product. The invention is simple in process, easy to control, adjustable in material properties, and has good anti-corrosion and waterproof properties, elasticity, damping, shock-absorbing and noise-reducing properties, and can be widely used in anti-corrosion, waterproof, protection, protection, Shock absorption, noise reduction, plugging and other occasions.

Description

Anti-corrosion and waterproof coating material and preparation method thereof

technical field

The invention relates to an anti-corrosion and waterproof coating material and its preparation, especially an anti-corrosion and waterproof elastic coating material suitable for use in anti-corrosion and waterproofing, protection, shock absorption, noise reduction, leak plugging, etc. Preparation.

technical background

U.S. Patent No. 6,203,930 discloses an anti-corrosion coating material based on metal powder and synthetic resin. The preparation process is to dissolve inorganic fillers, pigments, and resins in a mixture of water and hydrophilic solvents, and then coat the mixture. Or spray it on the surface of the pre-treated metal substrate, and then cure it by air-drying at room temperature or heating-drying. When the anticorrosion coating prepared by this method is applied on the surface of the metal substrate, the metal substrate must be pretreated, that is, the surface of the metal substrate is plated with zinc or coated with a layer of zinc powder paint, so that the anticorrosion coating The construction operation of the layer material is more complicated when it is applied, and its application range is limited. In addition, this method uses a mixture of water and a hydrophilic solvent as a solvent for the resin, so a resin with a certain degree of hydrophilicity must be used; therefore, the final cured anti-corrosion coating has slightly poor water resistance.

U.S. Patent No. 6,291,054 discloses a method for making an anti-corrosion coating material. The anti-corrosion coating includes three layers, namely a bottom layer, a middle coating and a surface layer; A mixture of fillers, pigments and liquid thermosetting resins; the middle coating and the surface layer are heated and cured at a temperature of 100-160°C; therefore, the anti-corrosion coating prepared by this method has a complicated preparation process and is not convenient for construction and application.

Contents of the invention

The purpose of the present invention is to overcome the defects of the prior art, and provide an excellent and stable anti-corrosion and waterproof elastic coating material and a convenient and practical preparation method thereof.

The purpose of the present invention can be achieved through the following measures:

The composition weight percentage of anticorrosion waterproof elastic coating material is as follows:

Components % by weight

Hydrophobic polymer with polar groups 10～30%

Elastic polymer 5～20%

Pigments and fillers 20～30%

Solvent 5～20%

Cross-linking agent 0.1～0.5%

Propellant 10～30%

Hydrophobic polymers with polar groups are selected from polymers containing functional groups such as hydroxyl and/or carboxyl or ester groups and/or amino and/or aldehyde groups or halogen or cyano groups, with molecular weights between 10,000 and 100,000; Hydrophobic polymers with polar groups are preferably selected from polymers containing hydroxyl and/or amino and/or carboxyl groups;

The elastomeric polymer is selected from elastomeric polymers having unsaturated double bonds and a molecular weight greater than 50,000;

Pigments are selected from various inorganic or organic pigments such as white, red, blue, green, black, purple, etc.;

The filler is selected from inorganic fillers, including silica and/or carbon black and/or titanium dioxide and/or talcum powder and/or lithopone and/or mica powder and/or calcium carbonate and/or zinc powder and/or phosphoric acid aluminum;

The solvent is selected from a polar solvent, a non-polar solvent, or a combination of polar and non-polar solvents;

The propellant is selected from gases such as propane and butane and/or methyl ether and/or methyl ethyl ether and/or dichloromethane;

The crosslinking agent is selected from metal salt crosslinking agents of naphthenic acid and isooctanoic acid.

The preparation method of anticorrosion waterproof elastic coating material is characterized in that it comprises the following steps:

Step one preparation:

According to the required color, adjust the weight percentage of each component within the weight percentage range of the following components, and prepare the materials according to the adjusted formula: 10-30% of hydrophobic polymer with polar groups, elastic polymer 5-20%, pigment and filler 20-30%, solvent 5-20%, propellant 10-30% and cross-linking agent 0.1-0.5%;

Step 2 Preparation of anti-corrosion and waterproof elastic coating material:

Dissolve the hydrophobic polymer and elastic polymer with polar groups in the step 1 component in the solvent; mix one-third of the above solution with pigments and fillers, and use it at a high speed at a speed of 500 to 1000 rpm Shear and stir for 10 to 20 minutes; then, mix the remaining two-thirds of the above solution with the mixture of pigment and filler, and stir at a low speed of 50 to 100 rpm for 20 to 40 minutes; put the crosslinking agent Pour into the above mixture, and stir at a medium speed for 20 to 30 minutes at a speed of 100 to 500 rpm;

Step 3 Canning of anti-corrosion and waterproof elastic coating materials:

Add a propellant to the anti-corrosion and waterproof elastic coating material prepared in step 2, and seal it with an aerosol can packaging machine to obtain an anti-corrosion and waterproof elastic coating material.

Compared with the prior art, the present invention has the following outstanding advantages:

1. Use hydrophobic polymers with polar groups to ensure that the material has excellent adhesion, anti-corrosion, and waterproof properties; use elastic polymers to ensure that the resulting coating has excellent shock absorption and noise reduction properties; the material in the application process , the metal substrate does not need to be pretreated, so the construction and application are convenient and the process is simple.

2. The anti-corrosion and waterproof coating material produced by this method has stable and excellent performance. It can be used for anti-corrosion and waterproofing, protection, shock absorption, noise reduction, leak plugging and other occasions in the chassis of motor vehicles, the ground in the compartment, and the construction industry.

3. The anti-corrosion and waterproof elastic coating material manufactured by this method adopts metal salts of oil-soluble naphthenic acid and isooctanoic acid as a crosslinking agent, which ensures that the coating can be cured at room temperature without high-temperature heating and curing, thereby making the process Simple and easy to apply.

4. The anti-corrosion and waterproof elastic coating material manufactured by this method is sprayed on the metal substrate to form an anti-corrosion and waterproof elastic coating. Determination method", GB/T1733-93 "Determination of water resistance of paint film", GB10834-89 "Determination of salt water resistance of paint film" and GB/T1732-93 "Determination of impact resistance of paint film". The product test result of embodiment 1-6 gained is as shown in table 1: the performance of table 1 embodiment gained product Adhesion waterproof performance Anti-corrosion properties elasticity Example 1 Level 0 (excellent) No discoloration, no shedding No discoloration, no shedding excellent Example 2 Level 0 (excellent) No discoloration, no shedding No discoloration, no shedding excellent Example 3 Level 0 (excellent) No discoloration, no shedding No discoloration, no shedding excellent Example 4 Level 0 (excellent) No discoloration, no shedding No discoloration, no shedding excellent Example 5 Level 0 (excellent) No discoloration, no shedding No discoloration, no shedding excellent Example 6 Level 0 (excellent) No discoloration, no shedding No discoloration, no shedding excellent

Detailed ways

The formula of embodiment 1-6 is as shown in table 2. The raw materials in Table 2 are commercially available chemical industry products.

Preparation steps of anti-corrosion and waterproof elastic coating material:

The hydrophobic polymer with polar groups in the components of each embodiment of Table 2, the elastic polymer are dissolved in the solvent of each embodiment of Table 2; 1/3 of the above-mentioned solution is mixed with pigment and filler, Put it into the JB90-D (Shanghai Specimen Model Factory) mixer, and adjust it to 500-1000 rpm according to Table 2 under high-speed shear stirring for 10-20 minutes; then, mix the remaining two-thirds of the above Mix the solution with the mixture of pigment and filler, adjust the agitator to 50-100 rpm and stir at a low speed for 20-40 minutes; put the cross-linking agent into the above mixture, adjust the agitator to 100-500 rpm Stir at a medium speed for 20 to 30 minutes at a rotating speed;

Add the propellant shown in the table to the prepared anti-corrosion and waterproof elastic coating material, and seal it with an aerosol can packaging machine to obtain the anti-corrosion and waterproof elastic coating material. Table 2

Claims (3)

1, anticorrosion water-proof elastic coated material is characterized in that the composition weight percentage composition is as follows:

Weight percentages of components

The hydrophobic polymer 10～30% of band polar group

Elastomeric polymer 5～20%

Pigment and filler 20～30%

Solvent 5～20%

Linking agent 0.1～0.5%

Propelling agent 10～30%

The hydrophobic polymer of band polar group is selected from and contains hydroxyl and/or carboxyl or ester group and/or amino and/or aldehyde radical or halogen or cyano functional group, and molecular weight is the polymkeric substance between 10000 to 100000;

Elastomeric polymer be selected from have unsaturated double-bond, molecular weight is greater than 50000 elastomer polymer;

Pigment is selected from from various inorganic or pigment dyestuffs such as white, redness, blueness, green, black, purples;

Filler is selected from mineral filler, comprises white carbon black and/or carbon black and/or talcum powder and/or zinc sulfide white and/or mica powder and/or lime carbonate and/or zinc powder and/or aluminum phosphate;

Solvent is selected from the combination of polar solvent, non-polar solvent or polarity and non-polar solvent;

Propelling agent is selected from propane and butane and/or methyl ether and/or methyl ethyl ether and/or methylene dichloride gas;

Linking agent is selected from the metallic salt linking agent of naphthenic acid and isocaprylic acid.

2,, it is characterized in that being selected from the polymkeric substance that contains hydroxyl and/or amino and/or carboxyl with the hydrophobic polymer of polar group according to the described anticorrosion water-proof elastic coated material of claim 1.

3, the preparation method of anticorrosion water-proof elastic coated material, its feature may further comprise the steps:

Step 1 is got the raw materials ready:

By required color, in following composition weight percentage composition scope, adjust the weight percent content of each component, and get the raw materials ready: the hydrophobic polymer 10～30% of band polar group by the prescription of adjusting, elastomeric polymer 5～20%, pigment and filler 20～30%, solvent 5～20%, propelling agent 10～30% and linking agent 0.1～0.5%;

The preparation of the anticorrosion water-proof elastic coated material of step 2:

At first hydrophobic polymer and the elastomeric polymer with the band polar group in the step 1 component is dissolved in the solvent; 1/3rd and pigment and filler with above-mentioned solution mixes again, and high speed shear stirred 10～20 minutes under 500～1000 rev/mins rotating speed; Mixed solution with 2/3rds and paint filler of above-mentioned solution mixes then, and stirring at low speed is 20～40 minutes under 50～100 rev/mins rotating speed; Linking agent is put into said mixture, and middling speed stirred 20～30 minutes under 100～500 rev/mins rotating speed;

The anticorrosion water-proof elastic coated material of step 3 canned:

In the anticorrosion water-proof elastic coated material of in step 2, preparing, add propelling agent,, promptly make anticorrosion water-proof elastic coated material with aerosol potting installation encapsulation.