Permeable reactive solvent-free waterproof base layer treating agent and preparation method thereof

Abstract

The invention provides a permeable reactive solvent-free waterproof base layer treating agent and a preparation method thereof, and the permeable reactive solvent-free waterproof base layer treating agent comprises the following raw materials by weight: 12-28 parts of a polyhydroxy compound; 15 to 25 parts of pentaerythritol polyether; 22-38 parts of vegetable oil; 15 to 30 parts of diisocyanate; 0.5 to 6 parts of a hydroxylamine compound; and 1.5 to 10 parts of a silane coupling agent. The environment-friendly waterproof base layer treating agent provided by the invention does not contain an organic solvent, is good in permeability, not only can be crosslinked and cured with inorganic matters in a concrete base layer, but also has good compatibility and bonding performance with a polyurethane organic coating film.

Description

Technical Field

[0001] The invention relates to the technical field of waterproof coatings, and in particular to a permeation reaction type solvent-free waterproof base treatment agent and a preparation method thereof. Background Art

[0002] Base treatment agent is a coating that is applied to the base layer before the waterproof layer is constructed in order to enhance the bonding force between the waterproof material and the base layer. At present, the waterproof base treatment agents in my country mainly include the following: (1) Polymer modified asphalt waterproof coating can also use asphalt solution (i.e. cold primer) as a base treatment agent; (2) Solvent-based waterproof coating, because its penetration ability is stronger than that of water-based waterproof coating, can be directly used as a base treatment with a thin coating, such as solvent-based chloroprene asphalt waterproof coating or solvent-based recycled rubber asphalt waterproof coating. If the coating is thick, it can be diluted with a corresponding solvent before use; (3) Water-based waterproof coating, the coating can be diluted with an aqueous solution or softened water mixed with 0.2% to 0.5% emulsifier, and the dosage ratio is generally: waterproof coating: emulsifier aqueous solution (or soft water) = 1: (0.5-1). The first two base treatment effects are better, but both contain certain organic solvents and free TDI and other harmful substances, which seriously pollute the environment and endanger health, and are not environmentally friendly; the third type is environmentally friendly, but the base treatment effect is poor, and it needs to be mixed on site, and the quality is difficult to control.

[0003] With the enhancement of environmental awareness and the advancement of science and technology, there is an urgent need to provide an environmentally friendly waterproof base treatment agent that does not contain organic solvents and has good permeability, can cross-link and solidify with inorganic matter in the concrete base, and has good compatible bonding properties with polyurethane organic coating films. Summary of the invention

[0004] In view of the defects and shortcomings in the prior art, the present invention provides a permeable reaction type solvent-free waterproof base treatment agent and a preparation method thereof. The environmentally friendly waterproof base treatment agent provided by the present invention does not contain organic solvents and has good permeability. It can cross-link and solidify with inorganic substances in the concrete base, and has good compatibility and bonding performance with polyurethane organic coating films.

[0005] In the first aspect, the present invention provides a permeable reaction type solvent-free waterproof base treatment agent, which comprises the following raw materials by weight: 12-28 parts of polyhydroxy compounds; Pentaerythritol polyether 15-25 parts; 22-38 parts of vegetable oil; 15-30 parts of diisocyanate; 0.5-6 parts of hydroxylamine compounds; Silane coupling agent 1.5~10 parts.

[0006] Preferably, the silane coupling agent is aminopropyltriethoxysilane.

[0007] In the present invention, the aminopropyl triethoxysilane is used as a novel coupling agent, which is composed of two groups, hydrophilic and hydrophobic, and can combine two substances of different properties to play the role of a bridge. The purity is 99.0%, and the appearance is a light yellow transparent liquid, which can be dissolved in benzene and ether. The silaneoxy contained in aminopropyl triethoxysilane is reactive to inorganic substances, and the organic functional group is reactive or compatible to organic substances. Therefore, when aminopropyl triethoxysilane is between the inorganic and organic interfaces, a bonding layer of organic matrix-aminopropyl triethoxysilane-inorganic matrix can be formed to improve the interface effect between inorganic and organic substances, thereby greatly improving the bonding strength between the waterproof coating and the base layer.

[0008] Preferably, the pentaerythritol polyether has a hydroxyl value of 500-600 mgKOH / g and a viscosity of 2000-3000 mPa·s at 25°C. In the present invention, pentaerythritol polyether (hydroxyl value of 500-600 mgKOH / g, viscosity of 2000-3000 mPa·s at 25°C, colorless to light yellow liquid, good thermal stability) and trimethylolpropane form a high-density polymer network through a cross-linking reaction. Pentaerythritol polyether with a preferred hydroxyl value and viscosity is conducive to forming a uniform polymer network structure, and through a cross-linking reaction with trimethylolpropane, the mechanical strength of the material can be further enhanced, and the water resistance and weather resistance can be improved.

[0009] Preferably, the diisocyanate is toluene diisocyanate.

[0010] More preferably, the polyol compound is trimethylolpropane. The trimethylolpropane used in the present invention is also known as 2,2-dimethylolbutanol, which has three typical hydroxymethyl groups on its molecule and reacts with toluene diisocyanate to form carbamate. The interaction between trimethylolpropane and toluene diisocyanate can further improve the coating performance.

[0011] More preferably, the hydroxylamine compound is N,N-dimethyl-2-hydroxyethylamine. The melting point of N,N-dimethyl-2-hydroxyethylamine is -59.0°C and the density is 0.89 kg / m 3 , viscosity 3.8MPa·s, miscible with water, and miscible in clear liquids of ethers and aromatics. N,N-dimethyl-2-hydroxyethylamine is an auxiliary catalyst and a reactive catalyst. As an auxiliary catalyst, it can effectively accelerate the curing reaction of diisocyanates. It is also reactive, and the hydroxyl group can react with toluene diisocyanate to further improve the strength and durability of the coating film. It also helps to improve the compatibility and bonding performance between the waterproof base treatment agent and the polyurethane organic coating.

[0012] Further preferably, the hydroxyl value of the vegetable oil is 150-200 mgKOH / g, and the hydroxyl content is 3%-5%. Preferably, the vegetable oil contains 50%-80% trifunctionality and 20%-50% difunctionality in terms of hydroxyl, and the average hydroxyl functionality is 2.0-3.0. The present invention uses vegetable oil in the permeation reaction type solvent-free waterproof base treatment agent system. As a natural ingredient, the vegetable oil has good biocompatibility, reduces the negative impact on the environment, and makes the product more environmentally friendly. The vegetable oil with the preferred parameters can form good crosslinking in the polymer network, enhance the flexibility of the material, improve the crack resistance and impact resistance of the coating, and further increase the adhesion of the coating. The vegetable oil further improves the performance in the waterproof base treatment agent and also enhances the environmental protection characteristics.

[0013] More preferably, the hydroxyl value of the vegetable oil is 163 mgKOH / g, and the hydroxyl content is 4.94%. Calculated based on the hydroxyl group, the vegetable oil contains 70% trifunctionality and 30% difunctionality, and the average hydroxyl functionality is 2.7.

[0014] More preferably, the penetrating reaction type solvent-free waterproof base treatment agent adopts the following raw materials in parts by weight: 13-25 parts of trimethylolpropane; Pentaerythritol polyether 17-21 parts; 25-35 parts of vegetable oil; 16-28 parts of toluene diisocyanate; 1-5 parts of N,N-dimethyl-2-hydroxyethylamine; 2-8 parts of aminopropyltriethoxysilane.

[0015] In the present invention, by optimizing the components of the environmentally friendly solvent-free waterproof base treatment agent and optimizing the usage ratio, the synergistic effect between the components is brought into play, so that the treatment agent can have better performance in comprehensive properties such as compatibility and adhesion and environmental friendliness.

[0016] In a second aspect, the preparation method of the penetrating reaction type solvent-free waterproof base treatment agent provided by the present invention comprises mixing a polyhydroxy compound, pentaerythritol polyether and vegetable oil, then adding diisocyanate and hydroxylamine compounds, and then adding a silane coupling agent.

[0017] Preferably, the preparation method of the penetration reaction type solvent-free waterproof base treatment agent comprises mixing trimethylolpropane, pentaerythritol polyether and vegetable oil, adding toluene diisocyanate and N, N-dimethyl-2-hydroxyethylamine after heating, heating to 75-85°C for reaction, adding the remaining amount of toluene diisocyanate, heating to 85-95°C with stirring, cooling, adding aminopropyl triethoxysilane, stirring and evacuating.

[0018] Preferably, the preparation method of the penetration reaction type solvent-free waterproof base treatment agent comprises mixing trimethylolpropane, pentaerythritol polyether and vegetable oil, heating to 40-55°C, stirring for 20-30 minutes, adding 80%-90% of the amount of toluene diisocyanate and N,N-dimethyl-2-hydroxyethylamine, heating to 75-85°C and reacting for 90-95 minutes, adding the remaining amount of toluene diisocyanate, heating to 85-95°C, stirring for 0.5-1h, cooling to below 50°C, adding aminopropyl triethoxysilane, stirring for 15-20 minutes (isocyanate content is 2%-5%, viscosity is 850-900 centipoise); evacuating to 0.06-0.08 MPa under stirring for 30-40 minutes, and evacuating to 0.06-0.08 MPa under static state for 10-20 minutes.

[0019] The infiltration reaction type solvent-free waterproof base treatment agent provided by the present invention does not contain organic solvents in its raw materials, and the VOCs content is less than 30g / kg, which is much lower than 100g / kg of the standard and similar products. It does not contain free toluene diisocyanate, is harmless to the environment and human body, and belongs to an environmentally friendly waterproof coating. Moreover, it has a good penetration base enhancement function, has good performance compatibility with the waterproof coating, and can greatly improve the bonding strength between the waterproof coating and the base. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described clearly and completely below. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] In the examples of the present invention, unless otherwise specified, the raw materials used in the following examples are all industrial products purchased on the market. Or they can be prepared by known methods. If no specific techniques or conditions are specified in the examples, they are all conventional methods or carried out according to the techniques or conditions described in the literature in this field, or according to the product instructions. If the manufacturers of the reagents and instruments used are not specified, they are all conventional products that can be purchased through regular channels.

[0022] Example 1

[0023] This embodiment provides a permeable reaction type solvent-free waterproof base treatment agent, and its raw materials are measured by weight: 15 parts of trimethylolpropane; Pentaerythritol polyether 17 parts; 35 parts of vegetable oil; Toluene diisocyanate 28 parts; 2 parts of N,N-dimethyl-2-hydroxyethylamine; 3 parts of aminopropyltriethoxysilane.

[0024] The present embodiment also provides a method for preparing the above-mentioned penetrating reaction type solvent-free waterproof base treatment agent, comprising mixing trimethylolpropane, pentaerythritol polyether and vegetable oil, heating to 40°C, stirring for 20 minutes, adding 80%% of the amount of toluene diisocyanate and N,N-dimethyl-2-hydroxyethylamine, heating to 75°C for reaction for 90 minutes, adding the remaining amount of toluene diisocyanate, heating to 85°C, stirring for 0.5h, cooling to below 50°C, adding aminopropyl triethoxysilane, and stirring for 15 minutes; evacuating to 0.06MPa for 30 minutes under stirring, and evacuating to 0.06MPa for 10 minutes under static state.

[0025] Example 2

[0026] This embodiment provides a permeable reaction type solvent-free waterproof base treatment agent, and its raw materials are measured by weight: 20 parts of trimethylolpropane; 20 parts of pentaerythritol polyether; 30 parts of vegetable oil; Toluene diisocyanate 22 parts; 3 parts of N,N-dimethyl-2-hydroxyethylamine; 5 parts of aminopropyltriethoxysilane.

[0027] The present embodiment also provides a method for preparing the above-mentioned penetrating reaction type solvent-free waterproof base treatment agent, comprising mixing trimethylolpropane, pentaerythritol polyether and vegetable oil, heating to 47.5°C, stirring for 25 minutes, adding 85% of the amount of toluene diisocyanate and N,N-dimethyl-2-hydroxyethylamine, heating to 80°C and reacting for 92.5 minutes, adding the remaining amount of toluene diisocyanate, heating to 90°C, stirring for 0.75 hours, cooling to below 50°C, adding aminopropyl triethoxysilane, and stirring for 17.5 minutes; evacuating to 0.07 MPa under stirring for 35 minutes, and evacuating to 0.07 MPa under static state for 15 minutes.

[0028] Example 3

[0029] This embodiment provides a permeable reaction type solvent-free waterproof base treatment agent, and its raw materials are measured by weight: 25 parts of trimethylolpropane; Pentaerythritol polyether 21 parts; 25 parts of vegetable oil; Toluene diisocyanate 16 parts; 5 parts of N,N-dimethyl-2-hydroxyethylamine; Aminopropyltriethoxysilane 8 parts.

[0030] The present embodiment also provides a method for preparing the above-mentioned penetrating reaction type solvent-free waterproof base treatment agent: comprising mixing trimethylolpropane, pentaerythritol polyether and vegetable oil, heating to 55°C, stirring for 30 minutes, adding 90% of the amount of toluene diisocyanate and N,N-dimethyl-2-hydroxyethylamine, heating to 85°C for reaction for 95 minutes, adding the remaining amount of toluene diisocyanate, heating to 95°C, stirring for 1 hour, cooling to below 50°C, adding aminopropyl triethoxysilane, and stirring for 20 minutes; evacuating to 0.08 MPa under stirring for 40 minutes, and evacuating to 0.08 MPa under static state for 20 minutes.

[0031] Comparative Example 1

[0032] It is a solvent-based waterproof base treatment agent purchased from the market.

[0033] Comparative Example 2

[0034] It is a solvent-free waterproof base treatment agent purchased from the market.

[0035] The performance of the penetrating reaction type solvent-free waterproof base treatment agent of the embodiment of the present invention and the existing waterproof base treatment agent are shown in Table 1.

[0036] Table 1

[0037] It can be seen from the table that the penetration reaction type solvent-free waterproof base treatment agent of the present invention has greatly improved bonding strength with the base layer and the waterproof layer compared with the existing waterproof base treatment agent, thereby significantly enhancing the bonding force between the waterproof material and the base layer and reducing the cost of the waterproof base treatment agent.

[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A penetrating reaction type solvent-free waterproof base treatment agent, characterized in that: The following raw materials are included by weight: 12-28 parts of polyhydroxy compounds; Pentaerythritol polyether 15-25 parts; 22-38 parts of vegetable oil; 15-30 parts of diisocyanate; 0.5-6 parts of hydroxylamine compounds; Silane coupling agent 1.5~10 parts.

2. The penetrating reactive solvent-free waterproof base treatment agent according to claim 1, characterized in that: The silane coupling agent is aminopropyltriethoxysilane.

3. The penetrating reaction type solvent-free waterproof base treatment agent according to claim 1 or 2, characterized in that: The hydroxyl value of the pentaerythritol polyether is 500-600 mgKOH / g.

4. The penetrating reactive solvent-free waterproof base treatment agent according to any one of claims 1 to 3, characterized in that: The diisocyanate is toluene diisocyanate.

5. The penetrating reactive solvent-free waterproof base treatment agent according to any one of claims 1 to 4, characterized in that: The polyhydroxy compound is trimethylolpropane.

6. The penetrating reactive solvent-free waterproof base treatment agent according to any one of claims 1 to 5, characterized in that: The hydroxylamine compound is N,N-dimethyl-2-hydroxyethylamine.

7. The penetrating reactive solvent-free waterproof base treatment agent according to any one of claims 1 to 6, characterized in that: The vegetable oil has a hydroxyl value of 150-200 mgKOH / g and a hydroxyl content of 3%-5%; And / or, based on hydroxyl groups, the vegetable oil contains 50% to 80% trifunctionality and 20% to 50% difunctionality, and the average hydroxyl functionality is 2.0 to 3.

0.

8. The penetrating reactive solvent-free waterproof base treatment agent according to claim 1, characterized in that: The following raw materials were used in parts by weight: 13-25 parts of trimethylolpropane; Pentaerythritol polyether 17-21 parts; 25-35 parts of vegetable oil; 16-28 parts of toluene diisocyanate; 1-5 parts of N,N-dimethyl-2-hydroxyethylamine; 2-8 parts of aminopropyltriethoxysilane.

9. The method for preparing the penetrating reaction type solvent-free waterproof base treatment agent according to any one of claims 1 to 8, characterized in that: The method comprises mixing polyhydroxy compound, pentaerythritol polyether and vegetable oil, adding diisocyanate and hydroxylamine compound, and then adding silane coupling agent.

10. The method for preparing the penetrating reaction type solvent-free waterproof base treatment agent according to claim 9, characterized in that: The method comprises mixing trimethylolpropane, pentaerythritol polyether and vegetable oil, adding toluene diisocyanate and N, N-dimethyl-2-hydroxyethylamine after heating, heating to 75-85°C for reaction, adding the remaining amount of toluene diisocyanate, heating to 85-95°C for stirring, cooling down and adding aminopropyl triethoxysilane, stirring and evacuating.

Images