阅读说明：本技术 一种阻燃聚氨酯防水涂料及其制备方法 (Flame-retardant polyurethane waterproof coating and preparation method thereof ) 是由 代方华 张江 于 2021-08-12 设计创作，主要内容包括：本发明公开了一种阻燃聚氨酯防水涂料及其制备方法,具体涉及防水涂料技术领域,包括：聚醚多元醇、1,6－己二异氰酸酯、有机金属催化剂、消泡剂、有机溶剂和复合填充剂。本发明可有效提高阻燃聚氨酯防水涂料的耐温变性能,保证涂料在不同温度下的防水阻燃性能,避免涂料在低温或高温环境中长时间使用之后阻燃性能降低；石墨和氮化硼在超声微波辐照剥离处理下,制成纳米层状石墨/纳米氮化硼材料,可有效加强涂料的阻燃性能和耐温变性能；可有效提升碳纤维与环氧树脂之间的粘附性和界面剪切强度,进而有效加强复合填充剂之间的结合效果,从而进一步提高涂料的耐温变性能和防水阻燃性能。(The invention discloses a flame-retardant polyurethane waterproof coating and a preparation method thereof, and particularly relates to the technical field of waterproof coatings, which comprises the following steps: polyether polyol, 1, 6-hexamethylene diisocyanate, an organic metal catalyst, a defoaming agent, an organic solvent and a composite filler. The invention can effectively improve the temperature change resistance of the flame-retardant polyurethane waterproof coating, ensure the waterproof flame-retardant performance of the coating at different temperatures and avoid the flame-retardant performance reduction of the coating after long-time use in a low-temperature or high-temperature environment; the graphite and the boron nitride are made into a nano layered graphite/nano boron nitride material under the ultrasonic microwave irradiation stripping treatment, so that the flame retardant property and the temperature change resistance of the coating can be effectively enhanced; the adhesion and the interface shear strength between the carbon fibers and the epoxy resin can be effectively improved, and then the bonding effect between the composite fillers is effectively enhanced, so that the temperature change resistance and the waterproof flame retardant property of the coating are further improved.)

1. The flame-retardant polyurethane waterproof coating is characterized by comprising the following components in parts by weight: comprises the following components in percentage by weight: 48.60-51.20% of polyether polyol, 20.40-21.40% of 1, 6-hexamethylene diisocyanate, 0.33-0.43% of organic metal catalyst, 0.25-0.31% of defoaming agent, 2.10-2.60% of organic solvent and the balance of composite filler.

2. The flame retardant polyurethane waterproofing coating according to claim 1, wherein: the composite filler comprises the following components in percentage by weight: 22.80-23.40% of graphite, 15.80-17.20% of boron nitride, 15.50-17.30% of nano silicon dioxide, 18.40-19.20% of carbon fiber and the balance of epoxy resin.

3. The flame retardant polyurethane waterproofing coating according to claim 2, wherein: comprises the following components in percentage by weight: 48.60% of polyether polyol, 20.40% of 1, 6-hexamethylene diisocyanate, 0.33% of organic metal catalyst, 0.25% of defoaming agent, 2.10% of organic solvent and 28.32% of composite filler; the composite filler comprises the following components in percentage by weight: 22.80% of graphite, 15.80% of boron nitride, 15.50% of nano silicon dioxide, 18.40% of carbon fiber and 27.50% of epoxy resin.

4. The flame retardant polyurethane waterproofing coating according to claim 2, wherein: comprises the following components in percentage by weight: 51.20% of polyether polyol, 21.40% of 1, 6-hexamethylene diisocyanate, 0.43% of organic metal catalyst, 0.31% of defoaming agent, 2.60% of organic solvent and 24.06% of composite filler; the composite filler comprises the following components in percentage by weight: 23.40% of graphite, 17.20% of boron nitride, 17.30% of nano silicon dioxide, 19.20% of carbon fiber and 22.90% of epoxy resin.

5. The flame retardant polyurethane waterproofing coating according to claim 2, wherein: comprises the following components in percentage by weight: 49.90% of polyether polyol, 20.90% of 1, 6-hexamethylene diisocyanate, 0.38% of organic metal catalyst, 0.28% of defoaming agent, 2.35% of organic solvent and 26.19% of composite filler; the composite filler comprises the following components in percentage by weight: 23.10% of graphite, 16.50% of boron nitride, 16.40% of nano silicon dioxide, 18.80% of carbon fiber and 25.20% of epoxy resin.

6. The flame retardant polyurethane waterproofing coating according to claim 1, wherein: the organic solvent is prepared by compounding one or more of butyl acetate, isobutyl acetate, ethyl acetate, n-propanol and tert-butanol; the organic metal catalyst is at least one of dibutyltin dilaurate, stannous octoate, bismuth isooctanoate and zinc neodecanoate.

7. The method of preparing a flame retardant polyurethane waterproofing paint according to any of claims 1 to 6, characterized in that: the preparation method comprises the following specific steps:

the method comprises the following steps: weighing the polyether polyol, the 1, 6-hexamethylene diisocyanate, the organic metal catalyst, the defoaming agent, the organic solvent and the composite filler in parts by weight;

step two: adding the composite filler obtained in the first step into deionized water, and then carrying out water bath ultrasonic treatment for 50-60 minutes to obtain a mixture a;

step three: adding the mixture a prepared in the step two into microwave equipment with a solvent collector to perform microwave irradiation stripping for 3-5 minutes, and performing inert gas protection during microwave irradiation stripping to obtain a mixture b;

step four: then mixing and stirring the mixture b with the polyether polyol, the organic metal catalyst and the organic solvent in the step one, and carrying out ultrasonic treatment for 20-30 minutes to obtain a mixture c;

step five: and (3) adding the 1, 6-hexamethylene diisocyanate and the defoaming agent obtained in the step (I) into the mixture c prepared in the step (IV), carrying out mechanical stirring and ultrasonic treatment for 30-40 minutes, and then carrying out drying treatment to obtain the flame-retardant polyurethane waterproof coating.

8. The method for preparing a flame retardant polyurethane waterproof coating according to claim 7, wherein the method comprises the following steps: in the second step, the weight part ratio of the composite filler to the deionized water is 1: 50-60, the ultrasonic frequency is 1.5-1.9 MHz, the ultrasonic power is 300-600W, and the water bath ultrasonic temperature is 45-75 ℃; in the third step, the microwave frequency is 1450-1850 MHz, and the microwave output power density is 80-110 mW/cm³The inert gas is one of nitrogen, argon and helium; in the fourth step, the ultrasonic frequency is 1.5-1.9 MHz, and the ultrasonic power is 300-600W; in the fifth step, the ultrasonic frequency is 29-35 KHz, the ultrasonic power is 900-1500W, and the mechanical stirring speed is 400-800 rpm.

9. The method for preparing a flame retardant polyurethane waterproof coating according to claim 8, wherein the method comprises the following steps: in the second step, the weight part ratio of the composite filler to the deionized water is 1: 50, the ultrasonic frequency is 1.5MHz, the ultrasonic power is 300W, and the water bath ultrasonic temperature is 45 ℃; in the third step, the microwave frequency is 1450MHz, and the microwave output power density is 80mW/cm³The inert gas is one of nitrogen, argon and helium; in the fourth step, the ultrasonic frequency is 1.5MHz, and the ultrasonic power is 300W; in the fifth step, the ultrasonic frequency is 29KHz, the ultrasonic power is 900W, and the mechanical stirring speed is 400 rpm.

10. The method for preparing a flame retardant polyurethane waterproof coating according to claim 8, wherein the method comprises the following steps: in the second step, the weight portion ratio of the composite filler to the deionized water is 1: 55, the ultrasonic frequency is 1.7MHz, the ultrasonic power is 450W, and the water bath ultrasonic temperature is 60 ℃; in the third step, the microwave frequency is 1650MHz, and the microwave output power density is 95mW/cm³The inert gas is nitrogen, argon or heliumOne of gas; in the fourth step, the ultrasonic frequency is 1.7MHz, and the ultrasonic power is 450W; in the fifth step, the ultrasonic frequency is 32KHz, the ultrasonic power is 1200W, and the mechanical stirring speed is 600 rpm.

Technical Field

The invention relates to the technical field of waterproof coatings, in particular to a flame-retardant polyurethane waterproof coating and a preparation method thereof.

Background

The coating is a liquid or solid material which is coated on the surface of an object and can form a film under certain conditions to play a role in protection, decoration or other special functions (insulation, rust prevention, mildew prevention, heat resistance and the like). The polyurethane waterproof paint is one kind of single component waterproof polyurethane paint prepared with isocyanate group-containing prepolymer prepared through addition polymerization of isocyanate, polyether, etc. and through mixing with catalyst, anhydrous assistant, anhydrous stuffing, solvent, etc. The polyurethane waterproof coating is mainly used for the construction treatment of waterproof coatings in the aspect of building engineering, and can effectively enhance the waterproof performance of building construction.

The existing polyurethane waterproof paint has poor temperature change resistance, and the flame retardant property is sharply reduced after the temperature change damage.

Disclosure of Invention

In order to overcome the above-mentioned drawbacks of the prior art, embodiments of the present invention provide a flame retardant polyurethane waterproof coating material and a preparation method thereof.

The flame-retardant polyurethane waterproof coating comprises the following components in percentage by weight: 48.60-51.20% of polyether polyol, 20.40-21.40% of 1, 6-hexamethylene diisocyanate, 0.33-0.43% of organic metal catalyst, 0.25-0.31% of defoaming agent, 2.10-2.60% of organic solvent and the balance of composite filler.

Further, the composite filler comprises the following components in percentage by weight: 22.80-23.40% of graphite, 15.80-17.20% of boron nitride, 15.50-17.30% of nano silicon dioxide, 18.40-19.20% of carbon fiber and the balance of epoxy resin.

Further, the paint comprises the following components in percentage by weight: 48.60% of polyether polyol, 20.40% of 1, 6-hexamethylene diisocyanate, 0.33% of organic metal catalyst, 0.25% of defoaming agent, 2.10% of organic solvent and 28.32% of composite filler; the composite filler comprises the following components in percentage by weight: 22.80% of graphite, 15.80% of boron nitride, 15.50% of nano silicon dioxide, 18.40% of carbon fiber and 27.50% of epoxy resin.

Further, the paint comprises the following components in percentage by weight: 51.20% of polyether polyol, 21.40% of 1, 6-hexamethylene diisocyanate, 0.43% of organic metal catalyst, 0.31% of defoaming agent, 2.60% of organic solvent and 24.06% of composite filler; the composite filler comprises the following components in percentage by weight: 23.40% of graphite, 17.20% of boron nitride, 17.30% of nano silicon dioxide, 19.20% of carbon fiber and 22.90% of epoxy resin.

Further, the paint comprises the following components in percentage by weight: 49.90% of polyether polyol, 20.90% of 1, 6-hexamethylene diisocyanate, 0.38% of organic metal catalyst, 0.28% of defoaming agent, 2.35% of organic solvent and 26.19% of composite filler; the composite filler comprises the following components in percentage by weight: 23.10% of graphite, 16.50% of boron nitride, 16.40% of nano silicon dioxide, 18.80% of carbon fiber and 25.20% of epoxy resin.

Further, the organic solvent is one or more of butyl acetate, isobutyl acetate, ethyl acetate, n-propanol and tert-butanol; the organic metal catalyst is at least one of dibutyltin dilaurate, stannous octoate, bismuth isooctanoate and zinc neodecanoate.

The invention also provides a preparation method of the flame-retardant polyurethane waterproof coating, which comprises the following specific preparation steps:

the method comprises the following steps: weighing the polyether polyol, the 1, 6-hexamethylene diisocyanate, the organic metal catalyst, the defoaming agent, the organic solvent and the composite filler in parts by weight;

step two: adding the composite filler obtained in the first step into deionized water, and then carrying out water bath ultrasonic treatment for 50-60 minutes to obtain a mixture a;

step three: adding the mixture a prepared in the step two into microwave equipment with a solvent collector to perform microwave irradiation stripping for 3-5 minutes, and performing inert gas protection during microwave irradiation stripping to obtain a mixture b;

step four: then mixing and stirring the mixture b with the polyether polyol, the organic metal catalyst and the organic solvent in the step one, and carrying out ultrasonic treatment for 20-30 minutes to obtain a mixture c;

step five: and (3) adding the 1, 6-hexamethylene diisocyanate and the defoaming agent obtained in the step (I) into the mixture c prepared in the step (IV), carrying out mechanical stirring and ultrasonic treatment for 30-40 minutes, and then carrying out drying treatment to obtain the flame-retardant polyurethane waterproof coating.

Further, in the second step, the weight part ratio of the composite filler to the deionized water is 1: 50-60, the ultrasonic frequency is 1.5-1.9 MHz, the ultrasonic power is 300-600W, and the water bath ultrasonic temperature is 45-75 ℃; in the third step, the microwave frequency is 1450-1850 MHz, and the microwave output power density is 80-110 mW/cm³The inert gas is one of nitrogen, argon and helium; in the fourth step, the ultrasonic frequency is 1.5-1.9 MHz, and the ultrasonic power is 300-600W; in the fifth step, the ultrasonic frequency is 29-35 KHz, the ultrasonic power is 900-1500W, and the mechanical stirring speed is 400-800 rpm.

Further, in the second step, the weight part ratio of the composite filler to the deionized water is 1: 50, the ultrasonic frequency is 1.5MHz, the ultrasonic power is 300W, and the water bath ultrasonic temperature is 45 ℃; in the third step, the microwave frequency is 1450MHz, and the microwave output power density is 80mW/cm³The inert gas is one of nitrogen, argon and helium; in the fourth step, the ultrasonic frequency is 1.5MHz, and the ultrasonic power is 300W; in the fifth step, the ultrasonic frequency is 29KHz, the ultrasonic power is 900W, and the mechanical stirring speed is 400 rpm.

Further, in the second step, the weight part ratio of the composite filler to the deionized water is 1: 55, the ultrasonic frequency is 1.7MHz, the ultrasonic power is 450W, and the water bath ultrasonic temperature is 60 ℃; in the third step, the microwave frequency is 1650MHz, and the microwave output power density is 95mW/cm³The inert gas is one of nitrogen, argon and helium; in the fourth step, the ultrasonic frequency is 1.7MHz, and the ultrasonic power is 450W; in the fifth step, the ultrasonic frequency is 32KHz, the ultrasonic power is 1200W, and the mechanical stirring speed is 600 rpm.

The invention has the technical effects and advantages that:

1. the flame-retardant polyurethane waterproof coating prepared by adopting the raw material formula can effectively improve the temperature change resistance of the flame-retardant polyurethane waterproof coating, ensure the waterproof flame-retardant performance of the coating at different temperatures and avoid the flame-retardant performance reduction of the coating after long-time use in a low-temperature or high-temperature environment; the composite filler is used for endowing the coating with functional treatment, and the flame retardant and waterproof performance of the coating is improved; graphite and boron nitride are made into a nano layered graphite/nano boron nitride material under the ultrasonic microwave irradiation stripping treatment, the nano layered graphite/nano boron nitride material is compounded with epoxy resin, and finally the composite material is blended with other raw materials, so that the nano layered graphite/nano boron nitride material can effectively enhance the flame retardant property and the temperature change resistance of the coating; the nano silicon dioxide is quickly compounded into the epoxy resin under the radiation of ultrasound and microwave, so that the flame retardant property of the coating is effectively enhanced; the carbon fibers are peeled off by short-time microwave irradiation, so that the interface performance between the carbon fibers and the epoxy resin can be effectively improved, the adhesion and the interface shear strength between the carbon fibers and the epoxy resin are improved, the bonding effect between the composite fillers is effectively enhanced, and the temperature change resistance and the waterproof flame retardant property of the coating are further improved;

2. in the process of preparing the flame-retardant polyurethane waterproof coating, the composite filler is added into deionized water for ultrasonic treatment in the second step, so that the composite filler can be effectively dispersed into the deionized water; in the third step, the mixture a is subjected to microwave irradiation stripping treatment, so that the normal output of the nano layered graphite/nano boron nitride material is ensured, the carbon fiber can be stripped by the microwave irradiation, the interface performance between the carbon fiber and the epoxy resin can be effectively enhanced, and the adhesion and the interface shear strength between the carbon fiber and the epoxy resin are improved; in the fourth step, the distribution uniformity and the contact effect of the raw materials can be effectively enhanced; in the sixth step, 29KHz ultrasonic treatment is carried out on all the raw materials, a cavitation effect is generated in the raw materials, the cavitation effect generates a large amount of heat, further, the reaction efficiency of the raw materials is effectively enhanced, the output effect of the coating is higher, and meanwhile, all components in the coating are distributed more uniformly.

Detailed Description

The following will clearly and completely describe the technical solutions 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 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:

the invention provides a flame-retardant polyurethane waterproof coating which comprises the following components in percentage by weight: 48.60% of polyether polyol, 20.40% of 1, 6-hexamethylene diisocyanate, 0.33% of organic metal catalyst, 0.25% of defoaming agent, 2.10% of organic solvent and 28.32% of composite filler; the composite filler comprises the following components in percentage by weight: 22.80% of graphite, 15.80% of boron nitride, 15.50% of nano silicon dioxide, 18.40% of carbon fiber and 27.50% of epoxy resin;

the organic solvent is prepared by compounding one or more of butyl acetate, isobutyl acetate, ethyl acetate, n-propanol and tert-butanol; the organic metal catalyst is selected from at least one of dibutyltin dilaurate, stannous octoate, bismuth isooctanoate and zinc neodecanoate;

the invention also provides a preparation method of the flame-retardant polyurethane waterproof coating, which comprises the following specific preparation steps:

the method comprises the following steps: weighing the polyether polyol, the 1, 6-hexamethylene diisocyanate, the organic metal catalyst, the defoaming agent, the organic solvent and the composite filler in parts by weight;

step two: adding the composite filler obtained in the step one into deionized water, and then carrying out water bath ultrasonic treatment for 50 minutes to obtain a mixture a;

step three: adding the mixture a prepared in the step two into microwave equipment with a solvent collector to perform microwave irradiation stripping for 3 minutes, and performing inert gas protection during microwave irradiation stripping to obtain a mixture b;

step four: then mixing and stirring the mixture b with the polyether polyol, the organic metal catalyst and the organic solvent in the step one, and performing ultrasonic treatment for 20 minutes to obtain a mixture c;

step five: and C, adding the 1, 6-hexamethylene diisocyanate and the defoaming agent obtained in the step I into the mixture c prepared in the step four, carrying out mechanical stirring and ultrasonic treatment for 30 minutes, and then carrying out drying treatment to obtain the flame-retardant polyurethane waterproof coating.

In the second step, the weight part ratio of the composite filler to the deionized water is 1: 50, the ultrasonic frequency is 1.5MHz, the ultrasonic power is 300W, and the water bath ultrasonic temperature is 45 ℃; in the third step, the microwave frequency is 1450MHz, and the microwave output power density is 80mW/cm³The inert gas is one of nitrogen, argon and helium; in the fourth step, the ultrasonic frequency is 1.5MHz, and the ultrasonic power is 300W; in the fifth step, the ultrasonic frequency is 29KHz, the ultrasonic power is 900W, and the mechanical stirring speed is 400 rpm.

Example 2:

different from the embodiment 1, the material comprises the following components in percentage by weight: 51.20% of polyether polyol, 21.40% of 1, 6-hexamethylene diisocyanate, 0.43% of organic metal catalyst, 0.31% of defoaming agent, 2.60% of organic solvent and 24.06% of composite filler; the composite filler comprises the following components in percentage by weight: 23.40% of graphite, 17.20% of boron nitride, 17.30% of nano silicon dioxide, 19.20% of carbon fiber and 22.90% of epoxy resin.

Example 3:

different from the examples 1-2, the material comprises the following components in percentage by weight: 49.90% of polyether polyol, 20.90% of 1, 6-hexamethylene diisocyanate, 0.38% of organic metal catalyst, 0.28% of defoaming agent, 2.35% of organic solvent and 26.19% of composite filler; the composite filler comprises the following components in percentage by weight: 23.10% of graphite, 16.50% of boron nitride, 16.40% of nano silicon dioxide, 18.80% of carbon fiber and 25.20% of epoxy resin.

Taking the flame-retardant polyurethane waterproof paint prepared in the above examples 1-3, the flame-retardant polyurethane waterproof paint of the first control group, the flame-retardant polyurethane waterproof paint of the second control group, the flame-retardant polyurethane waterproof paint of the third control group, the flame-retardant polyurethane waterproof paint of the fourth control group and the flame-retardant polyurethane waterproof paint of the fifth control group respectively, the flame-retardant polyurethane waterproof paint of the first control group has no graphite compared with the examples, the flame-retardant polyurethane waterproof paint of the second control group has no boron nitride compared with the examples, the flame-retardant polyurethane waterproof paint of the third control group has no nano silica compared with the examples, the flame-retardant polyurethane waterproof paint of the fourth control group has no carbon fiber compared with the examples, the flame-retardant polyurethane waterproof paint of the fifth control group has no epoxy resin compared with the examples, and the flame-retardant polyurethane waterproof paints prepared in the three examples and the flame-retardant polyurethane waterproof paints of the five control groups are respectively tested in eight groups, uniformly mixing 30 samples in each group with water according to the mass ratio of 3:1, coating the mixture on a cement building base material with the thickness of 3mm, and testing after completely drying; the test results are shown in table one:

table one:

as can be seen from Table I, when the flame-retardant polyurethane waterproof coating comprises the following raw materials in parts by weight: comprises the following components in percentage by weight: 49.90% of polyether polyol, 20.90% of 1, 6-hexamethylene diisocyanate, 0.38% of organic metal catalyst, 0.28% of defoaming agent, 2.35% of organic solvent and 26.19% of composite filler; the composite filler comprises the following components in percentage by weight: 23.10% of graphite, 16.50% of boron nitride, 16.40% of nano silicon dioxide, 18.80% of carbon fiber and 25.20% of epoxy resin, the temperature change resistance of the flame-retardant polyurethane waterproof coating can be effectively improved, the waterproof and flame-retardant performances of the coating at different temperatures are ensured, and the flame-retardant performance of the coating is prevented from being reduced after the coating is used for a long time in a low-temperature or high-temperature environment; example 3 is a preferred embodiment of the present invention, in the formulation, polyether polyol and 1, 6-hexamethylene diisocyanate are contacted and reacted to synthesize a prepolymer containing isocyanate groups, an organic metal catalyst is used to catalyze the reaction of the coating, an organic solvent is used to dissolve the raw materials of the coating, so that the raw materials are reacted more fully, and the defoaming agent is used to eliminate bubbles generated by the reaction, so that the coating quality is better; the composite filler is used for endowing the coating with functional treatment, and the flame retardant and waterproof performance of the coating is improved; graphite and boron nitride are made into a nano layered graphite/nano boron nitride material under the ultrasonic microwave irradiation stripping treatment, the nano layered graphite/nano boron nitride material is compounded with epoxy resin, and finally the composite material is blended with other raw materials, so that the nano layered graphite/nano boron nitride material can effectively enhance the flame retardant property and the temperature change resistance of the coating; the nano silicon dioxide is quickly compounded into the epoxy resin under the radiation of ultrasound and microwave, so that the flame retardant property of the coating is effectively enhanced; the carbon fiber is stripped in short-time microwave irradiation, so that the interface performance between the carbon fiber and the epoxy resin can be effectively improved, the adhesion and the interface shear strength between the carbon fiber and the epoxy resin are improved, the bonding effect between the composite fillers is effectively enhanced, and the temperature change resistance and the waterproof flame retardant performance of the coating are further improved.

Example 4:

the invention provides a flame-retardant polyurethane waterproof coating which comprises the following components in percentage by weight: 49.90% of polyether polyol, 20.90% of 1, 6-hexamethylene diisocyanate, 0.38% of organic metal catalyst, 0.28% of defoaming agent, 2.35% of organic solvent and 26.19% of composite filler; the composite filler comprises the following components in percentage by weight: 23.10% of graphite, 16.50% of boron nitride, 16.40% of nano silicon dioxide, 18.80% of carbon fiber and 25.20% of epoxy resin;

the organic solvent is prepared by compounding one or more of butyl acetate, isobutyl acetate, ethyl acetate, n-propanol and tert-butanol; the organic metal catalyst is selected from at least one of dibutyltin dilaurate, stannous octoate, bismuth isooctanoate and zinc neodecanoate;

the invention also provides a preparation method of the flame-retardant polyurethane waterproof coating, which comprises the following specific preparation steps:

the method comprises the following steps: weighing the polyether polyol, the 1, 6-hexamethylene diisocyanate, the organic metal catalyst, the defoaming agent, the organic solvent and the composite filler in parts by weight;

step two: adding the composite filler obtained in the step one into deionized water, and then carrying out water bath ultrasonic treatment for 55 minutes to obtain a mixture a;

step three: adding the mixture a prepared in the step two into microwave equipment with a solvent collector to perform microwave irradiation stripping for 4 minutes, and performing inert gas protection during microwave irradiation stripping to obtain a mixture b;

step four: then mixing and stirring the mixture b with the polyether polyol, the organic metal catalyst and the organic solvent in the step one, and carrying out ultrasonic treatment for 25 minutes to obtain a mixture c;

step five: and C, adding the 1, 6-hexamethylene diisocyanate and the defoaming agent obtained in the step I into the mixture c prepared in the step four, carrying out mechanical stirring and ultrasonic treatment for 35 minutes, and then carrying out drying treatment to obtain the flame-retardant polyurethane waterproof coating.

In the second step, the weight part ratio of the composite filler to the deionized water is 1: 50, the ultrasonic frequency is 1.5MHz, the ultrasonic power is 300W, and the water bath ultrasonic temperature is 45 ℃; in the third step, the microwave frequency is 1450MHz, and the microwave output power density is 80mW/cm³The inert gas is one of nitrogen, argon and helium; in the fourth step, the ultrasonic frequency is 1.5MHz, and the ultrasonic power is 300W; in the fifth step, the ultrasonic frequency is 29KHz, the ultrasonic power is 900W, and the mechanical stirring speed is 400 rpm.

Example 5:

different from the embodiment 4, in the second step, the weight part ratio of the composite filler to the deionized water is 1: 60, the ultrasonic frequency is 1.9MHz, the ultrasonic power is 600W, and the water bath ultrasonic temperature is 75 ℃; in the third step, the microwave frequency is 1850MHz, and the microwave output power density is 110mW/cm³The inert gas is one of nitrogen, argon and helium; in the fourth step, the ultrasonic frequency is 1.9MHz, and the ultrasonic power is 600W; in the fifth step, the ultrasonic frequency is 35KHz, the ultrasonic power is 1500W, and the mechanical stirring rotating speed is 800rpm。

Example 6:

different from the examples 4 to 5, in the second step, the weight part ratio of the composite filler to the deionized water is 1: 55, the ultrasonic frequency is 1.7MHz, the ultrasonic power is 450W, and the water bath ultrasonic temperature is 60 ℃; in the third step, the microwave frequency is 1650MHz, and the microwave output power density is 95mW/cm³The inert gas is one of nitrogen, argon and helium; in the fourth step, the ultrasonic frequency is 1.7MHz, and the ultrasonic power is 450W; in the fifth step, the ultrasonic frequency is 32KHz, the ultrasonic power is 1200W, and the mechanical stirring speed is 600 rpm.

Taking the flame-retardant polyurethane waterproof coating prepared in the above examples 4 to 6, the flame-retardant polyurethane waterproof coating of the sixth control group, the flame-retardant polyurethane waterproof coating of the seventh control group, the flame-retardant polyurethane waterproof coating of the eighth control group and the flame-retardant polyurethane waterproof coating of the ninth control group, respectively, the flame-retardant polyurethane waterproof coating of the sixth control group has no operation in the second step compared with the examples, the flame-retardant polyurethane waterproof coating of the seventh control group has no operation in the third step compared with the examples, the flame-retardant polyurethane waterproof coating of the eighth control group has no operation of ultrasonic treatment in the fourth step compared with the examples, the flame-retardant polyurethane waterproof coating of the ninth control group has no operation of ultrasonic treatment in the fifth step compared with the examples, and the flame-retardant polyurethane waterproof coatings prepared in the three examples and the flame-retardant polyurethane waterproof coatings of the four control groups are respectively tested in seven groups, every 30 samples are taken as a group, after being uniformly mixed with water according to the mass ratio of 3:1, the flame-retardant polyurethane waterproof coating is coated on a cement building base material with the thickness of 3mm, and after being completely dried, the test results are shown in the following table two:

table two:

as can be seen from table two, example 6 is a preferred embodiment of the present invention; in the second step, the composite filler is added into deionized water, and then 1.7MHz ultrasonic treatment is carried out, so that the composite filler can be effectively dispersed into the deionized water; in the third step, the mixture a is subjected to microwave irradiation stripping treatment, inert gas is used as shielding gas, the deionized water added before serves as an intercalation solvent, normal production of the nano layered graphite/nano boron nitride material is ensured, the carbon fiber can be stripped by microwave irradiation, the interface performance between the carbon fiber and epoxy resin can be effectively enhanced, and the adhesion and the interface shear strength between the carbon fiber and the epoxy resin are improved; in the fourth step, the mixture b is mixed with the polyether polyol, the organic metal catalyst and the organic solvent in the first step for 1.7MHz ultrasonic treatment, so that the distribution uniformity and the contact effect of the raw materials can be effectively enhanced; in the sixth step, 29KHz ultrasonic treatment is carried out on all the raw materials, a cavitation effect is generated in the raw materials, the cavitation effect generates a large amount of heat, further, the reaction efficiency of the raw materials is effectively enhanced, the output effect of the coating is higher, and meanwhile, all components in the coating are distributed more uniformly.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.