阅读说明：本技术 一种多功能改性聚氨酯防水卷材 (Multifunctional modified polyurethane waterproof coiled material ) 是由 刘颜昆 张以才 于 2020-11-09 设计创作，主要内容包括：本发明公开了一种多功能改性聚氨酯防水卷材,包括基布层和改性聚氨酯涂层,所述改性聚氨酯涂层设置有两层,两层所述改性聚氨酯涂层分别设置在所述基布层的两侧面上,按照质量组份计所述改性聚氨酯涂层的原料包括聚醚型热塑性聚氨酯、二苯甲烷二异氰酸酯、增粘树脂、MDI半预聚物、有机硅改性硅酸盐、有机硅改性苯丙乳液、钛白粉、聚丙烯纤维、三聚磷酸钾、催化剂、偶联剂、消泡剂、抗氧化剂和阻燃剂；本发明还提供了一种多功能改性聚氨酯防水卷材的制备方法。本发明的内外两侧面均具有显著的阻燃和防水性能,吸水率非常低,具有优异的耐水侵蚀性,同时具有优异的物理性能,拉伸强度、断裂伸长率和撕裂强度均得到大大提升。(The invention discloses a multifunctional modified polyurethane waterproof coiled material which comprises a base cloth layer and a modified polyurethane coating, wherein the modified polyurethane coating is provided with two layers, the two layers of modified polyurethane coatings are respectively arranged on two side surfaces of the base cloth layer, and raw materials of the modified polyurethane coating comprise polyether type thermoplastic polyurethane, diphenylmethane diisocyanate, tackifying resin, MDI semi-prepolymer, organosilicon modified silicate, organosilicon modified styrene-acrylic emulsion, titanium dioxide, polypropylene fiber, potassium tripolyphosphate, a catalyst, a coupling agent, a defoaming agent, an antioxidant and a flame retardant according to mass components; the invention also provides a preparation method of the multifunctional modified polyurethane waterproof coiled material. The invention has the advantages that the inner side surface and the outer side surface of the invention both have obvious flame retardant and waterproof properties, the water absorption rate is very low, the invention has excellent water erosion resistance and excellent physical properties, and the tensile strength, the elongation at break and the tearing strength are all greatly improved.)

1. A multifunctional modified polyurethane waterproof coiled material is characterized in that: the fabric comprises a base fabric layer (1) and a modified polyurethane coating (2), wherein the modified polyurethane coating (2) is provided with two layers, and the two layers of the modified polyurethane coating (2) are respectively arranged on two side surfaces of the base fabric layer (1);

the modified polyurethane coating (2) comprises the following raw materials in parts by mass: 50-66 parts of polyether type thermoplastic polyurethane, 15-25 parts of diphenylmethane diisocyanate, 6-10 parts of tackifying resin, 8-12 parts of MDI semi-prepolymer, 6-12 parts of organic silicon modified silicate, 8-10 parts of organic silicon modified styrene-acrylic emulsion, 8-15 parts of titanium dioxide, 4-6 parts of polypropylene fiber, 1-3 parts of potassium tripolyphosphate, 1-5 parts of catalyst, 6-10 parts of coupling agent, 1-3 parts of defoaming agent, 2-5 parts of antioxidant and 1-3 parts of flame retardant.

2. The multifunctional modified polyurethane waterproof roll as claimed in claim 1, wherein the base cloth layer (1) is a glass fiber cloth layer.

3. The multifunctional modified polyurethane waterproof roll as claimed in claim 1, wherein the base cloth layer (1) is provided with raised arc-shaped connecting wires (3), and the arc-shaped connecting wires (3) and the base cloth layer (1) are integrally arranged.

4. The multifunctional modified polyurethane waterproof roll as claimed in claim 1, wherein the thickness of the base fabric layer (1) is 1-3mm, and the thickness of the modified polyurethane coating layer (2) is 0.5-2 mm.

5. The multifunctional modified polyurethane waterproof roll as claimed in claim 1, wherein the formula of the modified polyurethane coating (2) further comprises 2-5 parts of carbon fibers.

6. The multifunctional modified polyurethane waterproofing membrane according to claim 1, wherein the tackifying resin is at least one of rosin resin, terpene resin, phenolic resin and petroleum resin.

7. The multifunctional modified polyurethane waterproof coiled material of claim 1, wherein the MDI semi-prepolymer is prepared by polycondensation reaction of MDI and a modifier thereof with polyether polyol; the polyether polyol is at least one of polyether diol and polyether triol.

8. The multifunctional modified polyurethane waterproof roll as claimed in claim 1, wherein the catalyst is an organotin catalyst.

9. The multifunctional modified polyurethane waterproof coiled material as claimed in claim 1, wherein the flame retardant comprises an inorganic flame retardant, an alkali solution, ethyl orthosilicate and absolute ethyl alcohol in a mass ratio of 1-5:1:1: 1-3;

the preparation of the flame retardant comprises the following steps:

mixing inorganic flame retardant, alkali solution and absolute ethyl alcohol uniformly, stirring for 10-30min at room temperature, then adding tetraethoxysilane, reacting for 1-2h at room temperature, centrifuging the mixed solution, pouring out clear liquid, adding absolute ethyl alcohol, performing ultrasonic dispersion, centrifuging again, washing, and drying to obtain the flame retardant.

10. A preparation method of a multifunctional modified polyurethane waterproof coiled material is characterized by comprising the following steps:

s1, preparing the modified polyurethane coating: weighing polyurethane coating raw materials according to a mass ratio, adding polyether type thermoplastic polyurethane, diphenylmethane diisocyanate and tackifying resin into a stirrer together, stirring for 20-40min at the stirring temperature of 30-40 ℃ to obtain a component A, adding MDI semi-prepolymer, organosilicon modified silicate, organosilicon modified styrene-acrylic emulsion, titanium dioxide, polypropylene fiber and potassium tripolyphosphate into the stirrer together, stirring for 30-60min at the stirring temperature of 25-35 ℃ to obtain a component B, and adding the component A, the component B, a catalyst, a coupling agent, a defoaming agent, an antioxidant and a flame retardant into the stirrer together, and stirring for 1-2h to obtain a modified polyurethane coating;

s2, cleaning the base cloth: placing the base cloth into a cleaning agent for cleaning for 20-60min, and placing the base cloth into a dehydrating machine for dehydrating after cleaning, wherein the dehydrating time is 10-30 min;

s3, drying the base cloth: placing the cleaned base cloth into a dryer for drying until the inside and the outside of the base cloth are dried;

s4, coating: uniformly coating the obtained modified polyurethane coating on two side surfaces of the base cloth until the modified polyurethane coating is coated to the required thickness;

s5, drying the paint: placing the base cloth coated with the modified polyurethane coating into a dryer for drying until the inside and the outside of the base cloth are dried to obtain the multifunctional modified polyurethane waterproof coiled material;

s6, rolling and storing: and (3) rolling the multifunctional modified polyurethane waterproof coiled material by using a rolling device, and packaging, warehousing and storing after rolling.

Technical Field

The invention belongs to the technical field of waterproof rolls, and particularly relates to a multifunctional modified polyurethane waterproof roll.

Background

The waterproof coiled material is mainly used for building walls, roofs, tunnels, highways, refuse landfills and the like, can be curled into a roll-shaped flexible building material product for resisting external rainwater and underground water leakage, is used as a leakage-free connection between an engineering foundation and a building, is a waterproof first barrier of the whole engineering, and plays a vital role in the whole engineering.

As notice No. CN110053319A discloses a compound waterproofing membrane, including pitch waterproof substrate, pitch waterproof substrate top covers there is the isolation layer, the isolation layer is the polyvinyl alcohol thin film layer, pitch waterproof substrate below covers there is two ingredient polyurethane waterproof coating layer below covers there is the sound absorbing layer, the sound absorbing layer below covers there is the light reflection stratum, light reflection stratum below covers there is the protective layer, and this waterproofing membrane adopts polyurethane waterproof coating, and two ingredient polyurethane waterproof coating are liquid, and normal atmospheric temperature forms through curing reaction and films to reach water-proof effects, simultaneously, still have effects such as anticorrosive, ageing resistance, possess very strong corrosion control effect, greatly reduced the damage that adverse circumstances caused.

However, only one side of the waterproof roll material positioned at the outer side has waterproof performance, poor flame retardant performance, high water absorption, poor water erosion resistance, poor physical properties such as tensile strength, elongation at break, tearing strength and the like, and is easy to damage.

Disclosure of Invention

The invention aims to provide a multifunctional modified polyurethane waterproof coiled material, wherein the inner side surface and the outer side surface of the multifunctional modified polyurethane waterproof coiled material have obvious flame retardance and waterproof performance, the water absorption rate is very low, the multifunctional modified polyurethane waterproof coiled material has excellent water erosion resistance and excellent physical performance, and the tensile strength, the elongation at break and the tear strength are greatly improved so as to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme:

a multifunctional modified polyurethane waterproof coiled material comprises a base cloth layer and a modified polyurethane coating, wherein the modified polyurethane coating is provided with two layers, and the two layers of modified polyurethane coatings are respectively arranged on two side surfaces of the base cloth layer;

the modified polyurethane coating comprises the following raw materials in parts by mass: 50-66 parts of polyether type thermoplastic polyurethane, 15-25 parts of diphenylmethane diisocyanate, 6-10 parts of tackifying resin, 8-12 parts of MDI semi-prepolymer, 6-12 parts of organic silicon modified silicate, 8-10 parts of organic silicon modified styrene-acrylic emulsion, 8-15 parts of titanium dioxide, 4-6 parts of polypropylene fiber, 1-3 parts of potassium tripolyphosphate, 1-5 parts of catalyst, 6-10 parts of coupling agent, 1-3 parts of defoaming agent, 2-5 parts of antioxidant and 1-3 parts of flame retardant.

Preferably, the base cloth layer is a glass fiber cloth layer.

Preferably, the base cloth layer is provided with a tilted arc connecting wire, and the arc connecting wire and the base cloth layer are integrally arranged.

Preferably, the thickness of the base cloth layer is 1-3mm, and the thickness of the modified polyurethane coating is 0.5-2 mm.

Preferably, the formula of the modified polyurethane coating also comprises 2-5 parts of carbon fiber.

Preferably, the tackifying resin is at least one of rosin resin, terpene resin, phenolic resin and petroleum resin.

Preferably, the MDI semi-prepolymer is prepared by polycondensation of MDI and a modifier thereof and polyether polyol; the polyether polyol is at least one of polyether diol and polyether triol.

Preferably, the catalyst is an organotin catalyst.

Preferably, the flame retardant comprises an inorganic flame retardant, an alkali solution, ethyl orthosilicate and absolute ethyl alcohol in a mass ratio of 1-5:1:1: 1-3;

the preparation of the flame retardant comprises the following steps:

mixing inorganic flame retardant, alkali solution and absolute ethyl alcohol uniformly, stirring for 10-30min at room temperature, then adding tetraethoxysilane, reacting for 1-2h at room temperature, centrifuging the mixed solution, pouring out clear liquid, adding absolute ethyl alcohol, performing ultrasonic dispersion, centrifuging again, washing, and drying to obtain the flame retardant.

A preparation method of a multifunctional modified polyurethane waterproof coiled material comprises the following steps:

s1, preparing the modified polyurethane coating: weighing polyurethane coating raw materials according to a mass ratio, adding polyether type thermoplastic polyurethane, diphenylmethane diisocyanate and tackifying resin into a stirrer together, stirring for 20-40min at the stirring temperature of 30-40 ℃ to obtain a component A, adding MDI semi-prepolymer, organosilicon modified silicate, organosilicon modified styrene-acrylic emulsion, titanium dioxide, polypropylene fiber and potassium tripolyphosphate into the stirrer together, stirring for 30-60min at the stirring temperature of 25-35 ℃ to obtain a component B, and adding the component A, the component B, a catalyst, a coupling agent, a defoaming agent, an antioxidant and a flame retardant into the stirrer together, and stirring for 1-2h to obtain a modified polyurethane coating;

s2, cleaning the base cloth: placing the base cloth into a cleaning agent for cleaning for 20-60min, and placing the base cloth into a dehydrating machine for dehydrating after cleaning, wherein the dehydrating time is 10-30 min;

s3, drying the base cloth: placing the cleaned base cloth into a dryer for drying until the inside and the outside of the base cloth are dried;

s4, coating: uniformly coating the obtained modified polyurethane coating on two side surfaces of the base cloth until the modified polyurethane coating is coated to the required thickness;

s5, drying the paint: placing the base cloth coated with the modified polyurethane coating into a dryer for drying until the inside and the outside of the base cloth are dried to obtain the multifunctional modified polyurethane waterproof coiled material;

s6, rolling and storing: and (3) rolling the multifunctional modified polyurethane waterproof coiled material by using a rolling device, and packaging, warehousing and storing after rolling.

Compared with the prior art, the invention has the beneficial effects that:

the multifunctional modified polyurethane waterproof coiled material is characterized in that the modified polyurethane coatings are arranged on the two side faces of the base cloth layer, so that the inner side face and the outer side face have obvious flame retardance and waterproof performance, the water absorption rate is very low, the water erosion resistance is excellent, the physical properties are excellent, and the tensile strength, the elongation at break and the tearing strength are greatly improved.

Drawings

FIG. 1 is a schematic sectional view of a multifunctional modified polyurethane waterproof roll according to the present invention;

FIG. 2 is a flow chart of a preparation method of the multifunctional modified polyurethane waterproof roll material of the invention.

In the figure: 1. a base cloth layer; 2. a modified polyurethane coating; 3. and an arc connecting wire.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1

A multifunctional modified polyurethane waterproof coiled material comprises a base cloth layer 1 and a modified polyurethane coating layer 2, wherein the modified polyurethane coating layer 2 is provided with two layers, and the two layers of the modified polyurethane coating layers 2 are respectively arranged on two side surfaces of the base cloth layer 1;

the modified polyurethane coating 2 comprises the following raw materials in parts by mass: 50 parts of polyether type thermoplastic polyurethane, 15 parts of diphenylmethane diisocyanate, 6 parts of tackifying resin, 8 parts of MDI semi-prepolymer, 6 parts of organic silicon modified silicate, 8 parts of organic silicon modified styrene-acrylic emulsion, 8 parts of titanium dioxide, 4 parts of polypropylene fiber, 1 part of potassium tripolyphosphate, 1 part of catalyst, 6 parts of coupling agent, 1 part of defoaming agent, 2 parts of antioxidant and 1 part of flame retardant.

In this embodiment, the base fabric layer 1 is preferably a glass fiber fabric layer.

In this embodiment, preferably, the base fabric layer 1 is provided with a tilted arc connecting wire 3, and the arc connecting wire 3 and the base fabric layer 1 are integrally arranged.

In this embodiment, preferably, the thickness of the base fabric layer 1 is 1mm, and the thickness of the modified polyurethane coating layer 2 is 0.5 mm.

In this embodiment, preferably, the formula of the modified polyurethane coating 2 further includes 2 parts of carbon fiber.

In this embodiment, the tackifying resin is preferably at least one of a rosin resin, a terpene resin, a phenol resin, and a petroleum resin.

In this embodiment, preferably, the MDI semi-prepolymer is prepared by polycondensation of MDI and its modifier with polyether polyol; the polyether polyol is at least one of polyether diol and polyether triol.

In this embodiment, preferably, the catalyst is an organotin catalyst.

In this embodiment, preferably, the flame retardant includes an inorganic flame retardant, an alkali solution, ethyl orthosilicate, and anhydrous ethanol in a mass ratio of 1:1:1: 1;

the preparation of the flame retardant comprises the following steps:

mixing inorganic flame retardant, alkali solution and absolute ethyl alcohol uniformly, stirring for 10min at room temperature, then adding tetraethoxysilane, reacting for 1h at room temperature, centrifuging the mixed solution, pouring out clear liquid, adding absolute ethyl alcohol, performing ultrasonic dispersion, centrifuging again, washing and drying to obtain the flame retardant.

A preparation method of a multifunctional modified polyurethane waterproof coiled material comprises the following steps:

s1, preparing the modified polyurethane coating: weighing polyurethane coating raw materials according to a mass ratio, adding polyether type thermoplastic polyurethane, diphenylmethane diisocyanate and tackifying resin into a stirrer together, stirring for 20min at the stirring temperature of 30 ℃ to obtain a component A, adding MDI semi-prepolymer, organic silicon modified silicate, organic silicon modified styrene-acrylic emulsion, titanium dioxide, polypropylene fiber and potassium tripolyphosphate into the stirrer together, stirring for 30min at the stirring temperature of 25 ℃ to obtain a component B, adding the component A, the component B, a catalyst, a coupling agent, a defoaming agent, an antioxidant and a flame retardant into the stirrer together, and stirring for 1h to obtain the modified polyurethane coating;

s2, cleaning the base cloth: placing the base cloth into a cleaning agent for cleaning for 20min, and placing the base cloth into a dehydrating machine for dehydrating after cleaning, wherein the dehydrating time is 10 min;

s3, drying the base cloth: placing the cleaned base cloth into a dryer for drying until the inside and the outside of the base cloth are dried;

s4, coating: uniformly coating the obtained modified polyurethane coating on two side surfaces of the base cloth until the modified polyurethane coating is coated to the required thickness;

s5, drying the paint: placing the base cloth coated with the modified polyurethane coating into a dryer for drying until the inside and the outside of the base cloth are dried to obtain the multifunctional modified polyurethane waterproof coiled material;

s6, rolling and storing: and (3) rolling the multifunctional modified polyurethane waterproof coiled material by using a rolling device, and packaging, warehousing and storing after rolling.

Example 2

A multifunctional modified polyurethane waterproof coiled material comprises a base cloth layer 1 and a modified polyurethane coating layer 2, wherein the modified polyurethane coating layer 2 is provided with two layers, and the two layers of the modified polyurethane coating layers 2 are respectively arranged on two side surfaces of the base cloth layer 1;

the modified polyurethane coating 2 comprises the following raw materials in parts by mass: 55 parts of polyether type thermoplastic polyurethane, 18 parts of diphenylmethane diisocyanate, 7 parts of tackifying resin, 9 parts of MDI semi-prepolymer, 8 parts of organic silicon modified silicate, 9 parts of organic silicon modified styrene-acrylic emulsion, 10 parts of titanium dioxide, 5 parts of polypropylene fiber, 2 parts of potassium tripolyphosphate, 2 parts of catalyst, 7 parts of coupling agent, 2 parts of defoaming agent, 3 parts of antioxidant and 2 parts of flame retardant.

In this embodiment, the base fabric layer 1 is preferably a glass fiber fabric layer.

In this embodiment, preferably, the base fabric layer 1 is provided with a tilted arc connecting wire 3, and the arc connecting wire 3 and the base fabric layer 1 are integrally arranged.

In this embodiment, preferably, the thickness of the base fabric layer 1 is 2mm, and the thickness of the modified polyurethane coating layer 2 is 1 mm.

In this embodiment, preferably, the formula of the modified polyurethane coating 2 further includes 3 parts of carbon fiber.

In this embodiment, the tackifying resin is preferably at least one of a rosin resin, a terpene resin, a phenol resin, and a petroleum resin.

In this embodiment, preferably, the MDI semi-prepolymer is prepared by polycondensation of MDI and its modifier with polyether polyol; the polyether polyol is at least one of polyether diol and polyether triol.

In this embodiment, preferably, the catalyst is an organotin catalyst.

In this embodiment, preferably, the flame retardant includes an inorganic flame retardant, an alkali solution, ethyl orthosilicate, and anhydrous ethanol in a mass ratio of 2:1:1: 2;

the preparation of the flame retardant comprises the following steps:

mixing inorganic flame retardant, alkali solution and absolute ethyl alcohol uniformly, stirring for 15min at room temperature, then adding tetraethoxysilane, reacting for 1.2h at room temperature, centrifuging the mixed solution, pouring out clear liquid, adding absolute ethyl alcohol, performing ultrasonic dispersion, centrifuging again, washing and drying to obtain the flame retardant.

A preparation method of a multifunctional modified polyurethane waterproof coiled material comprises the following steps:

s1, preparing the modified polyurethane coating: weighing polyurethane coating raw materials according to a mass ratio, adding polyether type thermoplastic polyurethane, diphenylmethane diisocyanate and tackifying resin into a stirrer together, stirring for 28min at the stirring temperature of 33 ℃ to obtain a component A, adding MDI semi-prepolymer, organosilicon modified silicate, organosilicon modified styrene-acrylic emulsion, titanium dioxide, polypropylene fiber and potassium tripolyphosphate into the stirrer together, stirring for 40min at the stirring temperature of 28 ℃ to obtain a component B, adding the component A, the component B, a catalyst, a coupling agent, a defoaming agent, an antioxidant and a flame retardant into the stirrer together, and stirring for 1.2h to obtain a modified polyurethane coating;

s2, cleaning the base cloth: placing the base cloth into a cleaning agent for cleaning for 35min, and placing the base cloth into a dehydrating machine for dehydrating after cleaning, wherein the dehydrating time is 18 min;

s3, drying the base cloth: placing the cleaned base cloth into a dryer for drying until the inside and the outside of the base cloth are dried;

s4, coating: uniformly coating the obtained modified polyurethane coating on two side surfaces of the base cloth until the modified polyurethane coating is coated to the required thickness;

s5, drying the paint: placing the base cloth coated with the modified polyurethane coating into a dryer for drying until the inside and the outside of the base cloth are dried to obtain the multifunctional modified polyurethane waterproof coiled material;

s6, rolling and storing: and (3) rolling the multifunctional modified polyurethane waterproof coiled material by using a rolling device, and packaging, warehousing and storing after rolling.

Example 3

A multifunctional modified polyurethane waterproof coiled material comprises a base cloth layer 1 and a modified polyurethane coating layer 2, wherein the modified polyurethane coating layer 2 is provided with two layers, and the two layers of the modified polyurethane coating layers 2 are respectively arranged on two side surfaces of the base cloth layer 1;

the modified polyurethane coating 2 comprises the following raw materials in parts by mass: 60 parts of polyether type thermoplastic polyurethane, 20 parts of diphenylmethane diisocyanate, 8 parts of tackifying resin, 10 parts of MDI semi-prepolymer, 10 parts of organic silicon modified silicate, 10 parts of organic silicon modified styrene-acrylic emulsion, 12 parts of titanium dioxide, 5 parts of polypropylene fiber, 2 parts of potassium tripolyphosphate, 3 parts of catalyst, 8 parts of coupling agent, 2 parts of defoaming agent, 4 parts of antioxidant and 2 parts of flame retardant.

In this embodiment, the base fabric layer 1 is preferably a glass fiber fabric layer.

In this embodiment, preferably, the base fabric layer 1 is provided with a tilted arc connecting wire 3, and the arc connecting wire 3 and the base fabric layer 1 are integrally arranged.

In this embodiment, preferably, the thickness of the base fabric layer 1 is 2mm, and the thickness of the modified polyurethane coating layer 2 is 1.5 mm.

In this embodiment, preferably, the formula of the modified polyurethane coating 2 further includes 4 parts of carbon fiber.

In this embodiment, the tackifying resin is preferably at least one of a rosin resin, a terpene resin, a phenol resin, and a petroleum resin.

In this embodiment, preferably, the MDI semi-prepolymer is prepared by polycondensation of MDI and its modifier with polyether polyol; the polyether polyol is at least one of polyether diol and polyether triol.

In this embodiment, preferably, the catalyst is an organotin catalyst.

In this embodiment, preferably, the flame retardant includes an inorganic flame retardant, an alkali solution, ethyl orthosilicate, and anhydrous ethanol in a mass ratio of 4:1:1: 2;

the preparation of the flame retardant comprises the following steps:

mixing inorganic flame retardant, alkali solution and absolute ethyl alcohol uniformly, stirring for 25min at room temperature, then adding tetraethoxysilane, reacting for 1.8h at room temperature, centrifuging the mixed solution, pouring out clear liquid, adding absolute ethyl alcohol, performing ultrasonic dispersion, centrifuging again, washing and drying to obtain the flame retardant.

A preparation method of a multifunctional modified polyurethane waterproof coiled material comprises the following steps:

s1, preparing the modified polyurethane coating: weighing polyurethane coating raw materials according to a mass ratio, adding polyether type thermoplastic polyurethane, diphenylmethane diisocyanate and tackifying resin into a stirrer together, stirring for 35min at the stirring temperature of 35 ℃ to obtain a component A, adding MDI semi-prepolymer, organic silicon modified silicate, organic silicon modified styrene-acrylic emulsion, titanium dioxide, polypropylene fiber and potassium tripolyphosphate into the stirrer together, stirring for 50min at the stirring temperature of 30 ℃ to obtain a component B, adding the component A, the component B, a catalyst, a coupling agent, a defoaming agent, an antioxidant and a flame retardant into the stirrer together, and stirring for 1.8h to obtain a modified polyurethane coating;

s2, cleaning the base cloth: placing the base cloth into a cleaning agent for cleaning for 50min, and placing the base cloth into a dehydrating machine for dehydrating after cleaning, wherein the dehydrating time is 25 min;

s3, drying the base cloth: placing the cleaned base cloth into a dryer for drying until the inside and the outside of the base cloth are dried;

s4, coating: uniformly coating the obtained modified polyurethane coating on two side surfaces of the base cloth until the modified polyurethane coating is coated to the required thickness;

s5, drying the paint: placing the base cloth coated with the modified polyurethane coating into a dryer for drying until the inside and the outside of the base cloth are dried to obtain the multifunctional modified polyurethane waterproof coiled material;

s6, rolling and storing: and (3) rolling the multifunctional modified polyurethane waterproof coiled material by using a rolling device, and packaging, warehousing and storing after rolling.

Example 4

A multifunctional modified polyurethane waterproof coiled material comprises a base cloth layer 1 and a modified polyurethane coating layer 2, wherein the modified polyurethane coating layer 2 is provided with two layers, and the two layers of the modified polyurethane coating layers 2 are respectively arranged on two side surfaces of the base cloth layer 1;

the modified polyurethane coating 2 comprises the following raw materials in parts by mass: 66 parts of polyether type thermoplastic polyurethane, 25 parts of diphenylmethane diisocyanate, 10 parts of tackifying resin, 12 parts of MDI semi-prepolymer, 12 parts of organic silicon modified silicate, 10 parts of organic silicon modified styrene-acrylic emulsion, 15 parts of titanium dioxide, 6 parts of polypropylene fiber, 3 parts of potassium tripolyphosphate, 5 parts of catalyst, 10 parts of coupling agent, 3 parts of defoaming agent, 5 parts of antioxidant and 3 parts of flame retardant.

In this embodiment, the base fabric layer 1 is preferably a glass fiber fabric layer.

In this embodiment, preferably, the base fabric layer 1 is provided with a tilted arc connecting wire 3, and the arc connecting wire 3 and the base fabric layer 1 are integrally arranged.

In this embodiment, preferably, the thickness of the base fabric layer 1 is 3mm, and the thickness of the modified polyurethane coating layer 2 is 2 mm.

In this embodiment, preferably, the formula of the modified polyurethane coating 2 further includes 5 parts of carbon fiber.

In this embodiment, the tackifying resin is preferably at least one of a rosin resin, a terpene resin, a phenol resin, and a petroleum resin.

In this embodiment, preferably, the MDI semi-prepolymer is prepared by polycondensation of MDI and its modifier with polyether polyol; the polyether polyol is at least one of polyether diol and polyether triol.

In this embodiment, preferably, the catalyst is an organotin catalyst.

In this embodiment, preferably, the flame retardant includes an inorganic flame retardant, an alkali solution, ethyl orthosilicate, and anhydrous ethanol in a mass ratio of 5:1:1: 3;

the preparation of the flame retardant comprises the following steps:

mixing inorganic flame retardant, alkali solution and absolute ethyl alcohol uniformly, stirring for 30min at room temperature, then adding tetraethoxysilane, reacting for 2h at room temperature, centrifuging the mixed solution, pouring out clear liquid, adding absolute ethyl alcohol, performing ultrasonic dispersion, centrifuging again, washing and drying to obtain the flame retardant.

A preparation method of a multifunctional modified polyurethane waterproof coiled material comprises the following steps:

s1, preparing the modified polyurethane coating: weighing polyurethane coating raw materials according to a mass ratio, adding polyether type thermoplastic polyurethane, diphenylmethane diisocyanate and tackifying resin into a stirrer together, stirring for 40min at the stirring temperature of 40 ℃ to obtain a component A, adding MDI semi-prepolymer, organic silicon modified silicate, organic silicon modified styrene-acrylic emulsion, titanium dioxide, polypropylene fiber and potassium tripolyphosphate into the stirrer together, stirring for 60min at the stirring temperature of 35 ℃ to obtain a component B, adding the component A, the component B, a catalyst, a coupling agent, a defoaming agent, an antioxidant and a flame retardant into the stirrer together, and stirring for 2h to obtain a modified polyurethane coating;

s2, cleaning the base cloth: placing the base cloth into a cleaning agent for cleaning for 60min, and placing the base cloth into a dehydrating machine for dehydrating after cleaning, wherein the dehydrating time is 30 min;

s3, drying the base cloth: placing the cleaned base cloth into a dryer for drying until the inside and the outside of the base cloth are dried;

s4, coating: uniformly coating the obtained modified polyurethane coating on two side surfaces of the base cloth until the modified polyurethane coating is coated to the required thickness;

s5, drying the paint: placing the base cloth coated with the modified polyurethane coating into a dryer for drying until the inside and the outside of the base cloth are dried to obtain the multifunctional modified polyurethane waterproof coiled material;

s6, rolling and storing: and (3) rolling the multifunctional modified polyurethane waterproof coiled material by using a rolling device, and packaging, warehousing and storing after rolling.

Experiments were conducted on the currently widely used general polyurethane waterproof rolls and the multifunctional modified polyurethane waterproof rolls obtained in examples 1 to 4, and the experimental contents and results were as follows:

selecting the multifunctional modified polyurethane waterproof coiled material prepared in the embodiments 1-4 as an experimental group material, and selecting a common polyurethane waterproof coiled material in the market as a control group material;

the detection criteria and experimental results are shown in the following table:

the experiment proves that the multifunctional modified polyurethane waterproof coiled material has excellent physical properties, and the tensile strength, the elongation at break and the tearing strength are greatly improved.

From the above analysis, it can be seen that the experimental results of example 3 are better than those of the other examples, and are the best examples.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.