A kind of asphalt polyurethane waterproof coating suitable for cement base and its preparation method and application

Abstract

The invention discloses an asphalt polyurethane waterproof coating suitable for cement bases and its preparation method and application. The polyurethane prepolymer is prepared by reacting the compound represented by formula (I) with the polyurethane prepolymer, and the blocked polyurethane prepolymer does not contain terminal isocyanate groups; preparation: first prepare the blocked polyurethane prepolymer, and then mix with the remaining raw materials are mixed; and the application of the above-mentioned waterproof coating on the asphalt waterproof coiled material construction on the cement base; the preparation process of the waterproof coating of the present invention is safe, and it can be directly coated on the cement base with more water content during use. The silicate reaction in the cement improves the adhesion on the wet base, and it also has excellent bonding strength with the asphalt waterproofing membrane, especially with a faster surface-drying time and moderate viscosity (basically can Avoid the step of heating up before construction), which is conducive to on-site construction.

Description

technical field

[0001] The invention belongs to the field of building waterproofing, and in particular relates to an asphalt polyurethane waterproof coating suitable for cement bases, a preparation method and application thereof. Background technique

[0002] At present, waterproof coiled materials have been greatly promoted and used in construction applications. They are mainly used in building walls, roofs, tunnels, roads, etc., to resist external rainwater and groundwater leakage. The roll-shaped flexible building material product, as the non-leakage connection between the engineering foundation and the building, is the first barrier for waterproofing the entire project and plays a vital role in the entire project. It must be strictly in accordance with GB5027-2002 (roofing engineering Quality acceptance specification) and design requirements for construction. Among them, the base (currently basically the cement base) should have a certain strength, and should not be she...

Examples

Embodiment 1

[0042] This example provides a bituminous polyurethane waterproof coating suitable for cement bases. In terms of parts by mass, its raw materials include: 30 parts of end-blocked polyurethane prepolymers, 60 parts of road No. 10 bitumen, 1 part of polyethylene wax, water-removing Agent silane 171 1 part, dibutyltin dilaurate 0.1 part, fumed silica 0.5 part, vinyltriethoxysilane 0.2 part, calcium oxide 0.1 part.

[0043] The preparation method comprises the following steps:

[0044] (1) Preparation of blocked polyurethane prepolymer:

[0045] 50 parts of Dongda polyether diol 2000 were vacuum dehydrated at 120°C and -0.1MPA to a moisture content below 0.05%, and then mixed with 10 parts of BASF TDI and reacted at 80°C for 3 hours. The measured NCO content was about Terminate reaction when 4.6%, make 60 parts of polyurethane prepolymers;

[0046] Then mix 20 parts of the compound represented by formula (I-1) with 60 parts of the polyurethane prepolymer prepared by the above me...

Embodiment 2

[0049] This example provides a bituminous polyurethane waterproof coating suitable for cement bases. In terms of parts by mass, its raw materials include: 40 parts of end-blocked polyurethane prepolymer, 55 parts of road No. 10 bitumen, 1 part of polyethylene wax, water-removing 1 part of agent silane 171, 0.2 part of dibutyltin dilaurate, 0.7 part of fumed silica, 0.1 part of vinyltriethoxysilane, and 0.1 part of calcium oxide.

[0050] The preparation method comprises the following steps:

[0051] (1) Preparation of blocked polyurethane prepolymer:

[0052] 50 parts of Dongda Polyether Diol 2000 and 25 parts of Dongda Polyether Diol 1000 were vacuum dehydrated at 120°C and -0.1MPA to a moisture content below 0.05%, and then mixed with 20 parts of BASF TDI in React at 80°C for 3 hours, stop the reaction when the measured NCO content is about 5.8%, and make 95 parts of polyurethane prepolymer;

[0053] Then, 50 parts of the compound represented by formula (I-2) was mixed wit...

Embodiment 3

[0056] This example provides a bituminous polyurethane waterproof coating suitable for cement bases. In terms of parts by mass, its raw materials include: 50 parts of end-blocked polyurethane prepolymer, 40 parts of road No. 10 bitumen, 1 part of polyethylene wax, water-removing Agent silane 171 1 part, dibutyltin dilaurate 0.1 part, fumed silica 0.8 part, vinyltriethoxysilane 0.2 part, calcium oxide 0.2 part.

[0057] The preparation method comprises the following steps:

[0058] (1) Preparation of blocked polyurethane prepolymer:

[0059] 25 parts of Dongda Polyether Diol 400 and 25 parts of Dongda Polyether Diol 1000 were vacuum dehydrated at 120°C and -0.1MPA to a moisture content below 0.05%, and then mixed with 45 parts of BASF MDI in React at 80°C for 2 hours, stop the reaction when the measured NCO content is about 8.17%, and make 95 parts of polyurethane prepolymer;

[0060] Then, 55 parts of the compound represented by formula (I-3) was mixed with 95 parts of the p...

technical field

[0001] The invention belongs to the field of building waterproofing, and in particular relates to an asphalt polyurethane waterproof coating suitable for cement bases, a preparation method and application thereof. Background technique

[0002] At present, waterproof coiled materials have been greatly promoted and used in construction applications. They are mainly used in building walls, roofs, tunnels, roads, etc., to resist external rainwater and groundwater leakage. The roll-shaped flexible building material product, as the non-leakage connection between the engineering foundation and the building, is the first barrier for waterproofing the entire project and plays a vital role in the entire project. It must be strictly in accordance with GB5027-2002 (roofing engineering Quality acceptance specification) and design requirements for construction. Among them, the base (currently basically the cement base) should have a certain strength, and should not be she...

Examples

Embodiment 1

[0042] This example provides a bituminous polyurethane waterproof coating suitable for cement bases. In terms of parts by mass, its raw materials include: 30 parts of end-blocked polyurethane prepolymers, 60 parts of road No. 10 bitumen, 1 part of polyethylene wax, water-removing Agent silane 171 1 part, dibutyltin dilaurate 0.1 part, fumed silica 0.5 part, vinyltriethoxysilane 0.2 part, calcium oxide 0.1 part.

[0043] The preparation method comprises the following steps:

[0044] (1) Preparation of blocked polyurethane prepolymer:

[0045] 50 parts of Dongda polyether diol 2000 were vacuum dehydrated at 120°C and -0.1MPA to a moisture content below 0.05%, and then mixed with 10 parts of BASF TDI and reacted at 80°C for 3 hours. The measured NCO content was about Terminate reaction when 4.6%, make 60 parts of polyurethane prepolymers;

[0046] Then mix 20 parts of the compound represented by formula (I-1) with 60 parts of the polyurethane prepolymer prepared by the above me...

Embodiment 2

[0049] This example provides a bituminous polyurethane waterproof coating suitable for cement bases. In terms of parts by mass, its raw materials include: 40 parts of end-blocked polyurethane prepolymer, 55 parts of road No. 10 bitumen, 1 part of polyethylene wax, water-removing 1 part of agent silane 171, 0.2 part of dibutyltin dilaurate, 0.7 part of fumed silica, 0.1 part of vinyltriethoxysilane, and 0.1 part of calcium oxide.

[0050] The preparation method comprises the following steps:

[0051] (1) Preparation of blocked polyurethane prepolymer:

[0052] 50 parts of Dongda Polyether Diol 2000 and 25 parts of Dongda Polyether Diol 1000 were vacuum dehydrated at 120°C and -0.1MPA to a moisture content below 0.05%, and then mixed with 20 parts of BASF TDI in React at 80°C for 3 hours, stop the reaction when the measured NCO content is about 5.8%, and make 95 parts of polyurethane prepolymer;

[0053] Then, 50 parts of the compound represented by formula (I-2) was mixed wit...

Embodiment 3

[0056] This example provides a bituminous polyurethane waterproof coating suitable for cement bases. In terms of parts by mass, its raw materials include: 50 parts of end-blocked polyurethane prepolymer, 40 parts of road No. 10 bitumen, 1 part of polyethylene wax, water-removing Agent silane 171 1 part, dibutyltin dilaurate 0.1 part, fumed silica 0.8 part, vinyltriethoxysilane 0.2 part, calcium oxide 0.2 part.

[0057] The preparation method comprises the following steps:

[0058] (1) Preparation of blocked polyurethane prepolymer:

[0059] 25 parts of Dongda Polyether Diol 400 and 25 parts of Dongda Polyether Diol 1000 were vacuum dehydrated at 120°C and -0.1MPA to a moisture content below 0.05%, and then mixed with 45 parts of BASF MDI in React at 80°C for 2 hours, stop the reaction when the measured NCO content is about 8.17%, and make 95 parts of polyurethane prepolymer;

[0060] Then, 55 parts of the compound represented by formula (I-3) was mixed with 95 parts of the p...

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