Spray polyurea high-performance waterproof paint and preparation method thereof

Abstract

The invention relates to a spray polyurea high-performance waterproof paint which is characterized by comprising component A and component B, wherein the component A comprises semi-prepolymer formed by the reaction between 70-35 parts of polyisocyanate and 30-50 parts of polyether glycol, and 0-15 parts of diluent based on parts by weight; the component B comprises 50-70 parts of amine-terminated polyether, 20-40 parts of amine chain extender and 5-10 parts of filler; and the volume ratio between the component A and the component B is 1:1. Compared with the common spray polyurea high-performance waterproof paint, the spray polyurea high-performance waterproof paint has higher tensile strength, elongation at break, tearing strength and other physical properties, and not only is applicable to waterproof projects of common building projects, basic facilities and the like, but also is especially suitable for high-difficulty waterproof projects of large basic facility construction such as a high speed railway, a subway, a tunnel, water conservancy project and the like.

Description

Technical field:

[0001] The invention relates to a spray polyurea high-performance waterproof coating and a preparation method thereof, which can be applied to waterproof projects such as construction projects and infrastructure facilities, especially to high-difficulty waterproof projects such as high-speed railways, subways, tunnels, and water conservancy projects. Background technique:

[0002] With the development of my country's economic construction, an advanced waterproof material is urgently needed in large-scale infrastructure construction, especially in difficult waterproof projects such as high-speed railways, subways, tunnels, and water conservancy projects. This kind of waterproof coating should overcome traditional waterproof materials such as asphalt membrane, single / two-component polyurethane waterproof coating and acrylic emulsion waterproof coating, which are not resistant to aging, cannot be exposed, have low strength, are not resistant to puncture, and hav...

Examples

Embodiment 1

[0027] Add 50 parts of MI into the reaction kettle, flush with nitrogen protection, stir at a constant speed, and after heating to 75-85°C, add dropwise 45 parts of low-unsaturated Polyether diol (molecular weight is 2000, degree of unsaturation is 0.007mol / Kg), dropwise time is 2 hours. After the dropwise addition, continue to react for 2 hours in the temperature range of 80-90°C, then add 5 parts of propylene carbonate (PC) and stir for 30 minutes, then cool and discharge the material, thereby preparing component A with an NCO% of 14.5%.

[0028] 5 parts of titanium dioxide, 0.5 parts of additives and 15.5 parts of JEFFAMIN @ Grind T-5000 on a three-roll mill, and after the fineness reaches ≤50 μm, put the grinding material into the ladle, and add the remaining 48 parts of JEFFAMIN @ T-5000, 22 copies of Ethacure @ 100, 8 parts of WanaLink6200 and 1 part of color paste, after high-speed mixing and stirring, filter the material with a 100-mesh sieve to obtain component B. ...

Embodiment 2

[0033] Add 48 parts of MI into the reaction kettle, flush with nitrogen protection, stir at a constant speed, and after heating to 75-85°C, add dropwise 45 parts of low-unsaturated Polyether diol (molecular weight is 4000, degree of unsaturation is 0.007mol / Kg), dropwise time is 2 hours. After the dropwise addition, continue to react for 2 hours in the temperature range of 80-90°C, then add 7 parts of propylene carbonate (PC) and stir for 30 minutes, then cool and discharge the material, thereby preparing component A with an NCO% of 15.3%.

[0034] 5 parts of titanium dioxide, 0.5 parts of additives and 15.5 parts of JEFFAMIN @Grind T-5000 on a three-roll mill, and after the fineness reaches ≤50 μm, put the grinding material into the ladle, and add the remaining 46 parts of JEFFAMIN @ T-5000, 22 copies of Ethacure @ 100, 10 parts of WanaLink 6200 and 1 part of color paste, after high-speed mixing and stirring, filter the material with a 100-mesh sieve to obtain component B. ...

Embodiment 3

[0039] Add 51 parts of MI into the reaction kettle, flush with nitrogen protection, stir at a constant speed, and after heating to 75-85°C, add dropwise 43 parts of low-unsaturated Polyether diol (molecular weight is 2000, degree of unsaturation is 0.007mol / Kg), dropwise time is 2 hours. After the dropwise addition, continue to react for 2 hours in the temperature range of 80-90°C, then add 6 parts of propylene carbonate (PC) and stir for 30 minutes, then cool and discharge the material, thereby preparing component A with an NCO% of 15.5%.

[0040] 7 parts of titanium dioxide, 0.5 parts of additives and 15.5 parts of JEFFAMIN @ D-2000 is ground on a three-roller mill, and after the fineness reaches ≤50 μm, put the grinding material into the cylinder, and add 36 parts of JEFFAMIN @ D-2000, 10 JEFFAMIN @ T-5000, 20 copies of Ethacure @ 100, 10 parts of Wana Link 6200 and 1 part of color paste, after high-speed mixing and stirring, filter the material with a 100-mesh screen to...

Technical field:

[0001] The invention relates to a spray polyurea high-performance waterproof coating and a preparation method thereof, which can be applied to waterproof projects such as construction projects and infrastructure facilities, especially to high-difficulty waterproof projects such as high-speed railways, subways, tunnels, and water conservancy projects. Background technique:

[0002] With the development of my country's economic construction, an advanced waterproof material is urgently needed in large-scale infrastructure construction, especially in difficult waterproof projects such as high-speed railways, subways, tunnels, and water conservancy projects. This kind of waterproof coating should overcome traditional waterproof materials such as asphalt membrane, single / two-component polyurethane waterproof coating and acrylic emulsion waterproof coating, which are not resistant to aging, cannot be exposed, have low strength, are not resistant to puncture, and hav...

Examples

Embodiment 1

[0027] Add 50 parts of MI into the reaction kettle, flush with nitrogen protection, stir at a constant speed, and after heating to 75-85°C, add dropwise 45 parts of low-unsaturated Polyether diol (molecular weight is 2000, degree of unsaturation is 0.007mol / Kg), dropwise time is 2 hours. After the dropwise addition, continue to react for 2 hours in the temperature range of 80-90°C, then add 5 parts of propylene carbonate (PC) and stir for 30 minutes, then cool and discharge the material, thereby preparing component A with an NCO% of 14.5%.

[0028] 5 parts of titanium dioxide, 0.5 parts of additives and 15.5 parts of JEFFAMIN @ Grind T-5000 on a three-roll mill, and after the fineness reaches ≤50 μm, put the grinding material into the ladle, and add the remaining 48 parts of JEFFAMIN @ T-5000, 22 copies of Ethacure @ 100, 8 parts of WanaLink6200 and 1 part of color paste, after high-speed mixing and stirring, filter the material with a 100-mesh sieve to obtain component B. ...

Embodiment 2

[0033] Add 48 parts of MI into the reaction kettle, flush with nitrogen protection, stir at a constant speed, and after heating to 75-85°C, add dropwise 45 parts of low-unsaturated Polyether diol (molecular weight is 4000, degree of unsaturation is 0.007mol / Kg), dropwise time is 2 hours. After the dropwise addition, continue to react for 2 hours in the temperature range of 80-90°C, then add 7 parts of propylene carbonate (PC) and stir for 30 minutes, then cool and discharge the material, thereby preparing component A with an NCO% of 15.3%.

[0034] 5 parts of titanium dioxide, 0.5 parts of additives and 15.5 parts of JEFFAMIN @Grind T-5000 on a three-roll mill, and after the fineness reaches ≤50 μm, put the grinding material into the ladle, and add the remaining 46 parts of JEFFAMIN @ T-5000, 22 copies of Ethacure @ 100, 10 parts of WanaLink 6200 and 1 part of color paste, after high-speed mixing and stirring, filter the material with a 100-mesh sieve to obtain component B. ...

Embodiment 3

[0039] Add 51 parts of MI into the reaction kettle, flush with nitrogen protection, stir at a constant speed, and after heating to 75-85°C, add dropwise 43 parts of low-unsaturated Polyether diol (molecular weight is 2000, degree of unsaturation is 0.007mol / Kg), dropwise time is 2 hours. After the dropwise addition, continue to react for 2 hours in the temperature range of 80-90°C, then add 6 parts of propylene carbonate (PC) and stir for 30 minutes, then cool and discharge the material, thereby preparing component A with an NCO% of 15.5%.

[0040] 7 parts of titanium dioxide, 0.5 parts of additives and 15.5 parts of JEFFAMIN @ D-2000 is ground on a three-roller mill, and after the fineness reaches ≤50 μm, put the grinding material into the cylinder, and add 36 parts of JEFFAMIN @ D-2000, 10 JEFFAMIN @ T-5000, 20 copies of Ethacure @ 100, 10 parts of Wana Link 6200 and 1 part of color paste, after high-speed mixing and stirring, filter the material with a 100-mesh screen to...