阅读说明：本技术 橡胶沥青防水涂料组合物、其制备方法及建筑材料 (Rubber asphalt waterproof coating composition, preparation method thereof and building material ) 是由 郭子斌 黄祖行 龚兴宇 颜小雨 何然 于 2021-10-14 设计创作，主要内容包括：本发明提供一种橡胶沥青防水涂料组合物、其制备方法及建筑材料,适用于建筑防水材料领域。所述橡胶沥青防水涂料组合物包括如下重量配比的原料组分：沥青100重量份、芳烃油19-134重量份、石蜡油0-24重量份、端羟基氢化聚丁二烯33-48重量份、聚醚三元醇0-50重量份、多异氰酸酯18-22重量份、填料23-212重量份、硅烷偶联剂0-9重量份,以及聚氨酯催化剂1-2重量份。本发明采用端羟基氢化聚丁二烯改性沥青制备得到的防水涂料能在常温下使用,施工方便,并具有良好的耐老化性和力学稳定性。(The invention provides a rubber asphalt waterproof coating composition, a preparation method thereof and a building material, which are suitable for the field of building waterproof materials. The rubber asphalt waterproof coating composition comprises the following raw material components in parts by weight: 100 parts of asphalt, 19-134 parts of aromatic oil, 0-24 parts of paraffin oil, 33-48 parts of hydroxyl-terminated hydrogenated polybutadiene, 0-50 parts of polyether triol, 18-22 parts of polyisocyanate, 23-212 parts of filler, 0-9 parts of silane coupling agent and 1-2 parts of polyurethane catalyst. The waterproof coating prepared from the hydroxyl-terminated hydrogenated polybutadiene modified asphalt can be used at normal temperature, is convenient to construct, and has good aging resistance and mechanical stability.)

1. The rubber asphalt waterproof coating composition is characterized by comprising the following raw material components in parts by weight:

100 parts by weight of asphalt;

19-134 parts by weight of aromatic oil;

0-24 parts of paraffin oil;

33-48 parts of hydroxyl-terminated hydrogenated polybutadiene;

0-50 parts of polyether triol;

18-22 parts of polyisocyanate;

23-212 parts of filler;

0-9 parts of silane coupling agent;

1-2 parts of polyurethane catalyst.

2. The rubber asphalt waterproof coating composition according to claim 1, which comprises the following raw material components in parts by weight:

100 parts by weight of asphalt;

19-134 parts by weight of aromatic oil;

12-24 parts of paraffin oil;

33-48 parts of hydroxyl-terminated hydrogenated polybutadiene;

10-50 parts of polyether triol;

18-22 parts of polyisocyanate;

23-212 parts of filler;

4.5-9 parts by weight of a silane coupling agent;

1-2 parts of polyurethane catalyst.

3. The rubberized asphalt waterproofing coating composition according to claim 1 or 2, wherein the hydroxyl-terminated hydrogenated polybutadiene has a number average molecular weight of 1000-5000.

4. The rubberized asphalt waterproofing coating composition according to claim 1 or 2, wherein the polyether triol has a number average molecular weight of 3000-8000.

5. The rubberized asphalt waterproofing coating composition according to claim 1 or 2, wherein the polyisocyanate is a mixture of one or more of diphenylmethane diisocyanate, polymethylene polyphenyl isocyanate and modified diphenylmethane diisocyanate.

6. The rubberized asphalt waterproofing coating composition according to claim 1 or 2, wherein the filler is a mixture of one or more of talc, heavy calcium, light calcium carbonate, kaolin, attapulgite, bentonite, and fine silica powder.

7. The rubberized asphalt waterproofing coating composition according to claim 1 or 2, wherein the silane coupling agent is one or a mixture of γ -aminopropyltriethoxysilane, γ - (2, 3-glycidoxy) propyltrimethoxysilane and γ -methacryloxypropyltrimethoxysilane.

8. The rubberized asphalt waterproofing coating composition according to claim 1 or 2, wherein the polyurethane catalyst is one or a mixture of two or more of dibutyltin dilaurate, stannous octoate, dibutyltin diacetate, dibutyltin bis (dodecylthio) and dibutyltin dichloride.

9. The method for preparing the rubber asphalt waterproof coating is characterized by comprising the following steps:

heating and mixing asphalt, aromatic oil, paraffin oil, hydroxyl-terminated hydrogenated polybutadiene, polyether polyol and a filler according to the weight ratio of any one of claims 1 to 8 to obtain a first mixture;

adding polyisocyanate to the first mixture to react a portion of the polyisocyanate with hydroxyl-terminated hydrogenated polybutadiene and polyether triol to obtain a second mixture;

adding a polyurethane catalyst into the second mixture, so that the polyurethane catalyst catalyzes isocyanate and hydroxyl-terminated hydrogenated polybutadiene to further react to obtain a third mixture;

adding a silane coupling agent to the third mixture to prepare the waterproof coating.

10. A waterproof-treated building material comprising a substrate and the rubberized asphalt waterproofing paint composition according to any one of claims 1 to 8 applied on the substrate.

Technical Field

The invention relates to the technical field of building waterproof materials, in particular to a rubber asphalt waterproof coating composition, a preparation method thereof and a building material.

Background

With the development of the construction industry, the demand of waterproof materials for construction engineering is increasing. The rubber asphalt waterproof paint is a novel waterproof material synthesized by a polymer synthesis technology, and has the effects of water resistance, corrosion resistance, moisture resistance, mildew resistance and the like. The rubber asphalt waterproof coating also has flexible waterproof adhesiveness and creep property, and can be firmly bonded on various dry base surfaces such as a top plate, a plane, a vertical surface, an inclined surface and the like. In engineering application, the rubber asphalt waterproof coating is often used in a composite matching manner with a waterproof coiled material, so that the problems of infirm welding of joints, hollowing of planes, gliding of vertical surfaces, difficulty in operation of complex parts and the like of a single waterproof coiled material due to seams are solved.

The existing asphalt waterproof paint cannot have excellent construction performance, aging resistance and mechanical stability.

Disclosure of Invention

The invention provides a rubber asphalt waterproof coating composition, a preparation method thereof and a building material, and aims to provide a rubber asphalt waterproof coating with excellent construction performance, aging resistance and mechanical stability.

On one hand, the embodiment of the invention provides a rubber asphalt waterproof coating composition which comprises the following raw material components in parts by weight:

100 parts by weight of asphalt;

19-134 parts by weight of aromatic oil;

0-24 parts of paraffin oil;

33-48 parts of hydroxyl-terminated hydrogenated polybutadiene;

0-50 parts of polyether triol;

18-22 parts of polyisocyanate;

23-212 parts of filler;

0-9 parts of silane coupling agent;

1-2 parts of polyurethane catalyst.

According to an embodiment of one aspect of the invention, the rubber asphalt waterproof coating composition comprises the following raw material components in parts by weight:

100 parts by weight of asphalt;

19-134 parts by weight of aromatic oil;

12-24 parts of paraffin oil;

33-48 parts of hydroxyl-terminated hydrogenated polybutadiene;

10-50 parts of polyether triol;

18-22 parts of polyisocyanate;

23-212 parts of filler;

4.5-9 parts by weight of a silane coupling agent;

1-2 parts of polyurethane catalyst.

According to an embodiment of one aspect of the present invention, the hydroxyl-terminated hydrogenated polybutadiene has a number average molecular weight of 1000-.

According to an embodiment of one aspect of the present invention, the number average molecular weight of the polyether triol is 3000-8000.

According to an embodiment of one aspect of the invention, the polyisocyanate is a mixture of one or more of diphenylmethane diisocyanate, polymethylene polyphenyl isocyanate and modified diphenylmethane diisocyanate.

According to an embodiment of one aspect of the invention, the filler is a mixture of one or more of talc, heavy calcium, light calcium carbonate, kaolin, attapulgite, bentonite and silica micropowder.

According to an embodiment of one aspect of the invention, the silane coupling agent is a mixture of one or more of gamma-aminopropyltriethoxysilane, gamma- (2, 3-glycidoxy) propyltrimethoxysilane and gamma-methacryloxypropyltrimethoxysilane.

According to an embodiment of one aspect of the invention, the polyurethane catalyst is a mixture of one or more of dibutyl tin dilaurate, stannous octoate, dibutyl tin diacetate, dibutyl tin bis (dodecyl thio) and dibutyl tin dichloride.

In another aspect, embodiments of the present invention provide a method for preparing a rubberized asphalt waterproofing paint, comprising the steps of:

heating and mixing asphalt, aromatic oil, paraffin oil, hydroxyl-terminated hydrogenated polybutadiene, polyether polyol and a filler according to the weight ratio to obtain a first mixture;

adding polyisocyanate to the first mixture to react a portion of the polyisocyanate with the hydroxyl-terminated hydrogenated polybutadiene and the polyether triol to obtain a second mixture;

adding a polyurethane catalyst into the second mixture, so that the polyurethane catalyst catalyzes isocyanate and hydroxyl-terminated hydrogenated polybutadiene to further react to obtain a third mixture;

adding a silane coupling agent to the third mixture to prepare the waterproof coating.

In still another aspect, an embodiment of the present invention provides a waterproof-treated building material comprising a substrate and the above-described rubberized asphalt waterproofing coating composition applied on the substrate.

Compared with the prior art, the invention has at least the following beneficial effects:

(1) the rubber asphalt waterproof coating provided by the invention has good construction performance.

The rubber asphalt waterproof coating composition provided by the invention contains aromatic oil, can reduce the viscosity of the coating to a certain extent, enables the coating to keep certain fluidity in an unheated state, can be constructed at normal temperature, does not contain volatile organic compounds in the construction and use processes, and is friendly to the environment and constructors.

(2) The rubber asphalt waterproof coating provided by the invention has good mechanical properties.

Firstly, the hydroxyl-terminated hydrogenated polybutadiene and the asphalt have similar polarities and good compatibility. The invention adopts hydroxyl-terminated hydrogenated polybutadiene modified asphalt, and the hydroxyl-terminated hydrogenated polybutadiene is distributed in the asphalt in a molecular chain structure.

The hydroxyl-terminated hydrogenated polybutadiene is distributed in the asphalt in a molecular chain structure, so that on one hand, the temperature sensitivity of the asphalt can be improved, and the waterproof coating has good high and low temperature resistance; on the other hand, the hydroxyl-terminated hydrogenated polybutadiene and the asphalt are not subjected to phase separation, and the colloid structure and the continuous phase state of the asphalt are not changed, so that the waterproof coating keeps excellent extensibility and excellent bonding performance to a base layer and/or a coiled material.

Secondly, in the rubber asphalt waterproof coating provided by the invention, partial hydroxyl-terminated hydrogenated polybutadiene reacts with polyisocyanate to form a cross-linked network structure, so that the cohesive strength of the waterproof coating can be effectively improved, and the good creep resistance is maintained.

And thirdly, the rubber asphalt waterproof coating provided by the invention absorbs air or moisture in a cement concrete base layer after construction to further carry out curing and crosslinking, so that the cohesive strength and the creep resistance of the waterproof coating are further improved.

(3) The rubber asphalt waterproof coating provided by the invention has good aging resistance.

According to the invention, the hydroxyl-terminated hydrogenated polybutadiene liquid rubber modified asphalt is adopted, and the main chain of the hydrogenated hydroxyl-terminated polybutadiene is a saturated structure, so that the waterproof coating has good aging resistance.

Detailed Description

In order to make the objects, technical solutions and advantageous technical effects of the present invention more clear, the present invention is further described in detail with reference to the following embodiments. It should be understood that the embodiments described in this specification are only for the purpose of explaining the present invention and are not intended to limit the present invention.

For the sake of brevity, only some numerical ranges are explicitly disclosed herein. However, any lower limit may be combined with any upper limit to form ranges not explicitly recited; and any lower limit may be combined with any other lower limit to form a range not explicitly recited, and similarly any upper limit may be combined with any other upper limit to form a range not explicitly recited. Also, although not explicitly recited, each point or individual value between endpoints of a range is encompassed within the range. Thus, each point or individual value can form a range not explicitly recited as its own lower or upper limit in combination with any other point or individual value or in combination with other lower or upper limits.

In the description herein, it is to be noted that, unless otherwise specified, "above" and "below" are inclusive, and "a plurality" of "one or more" means two or more, "and" a plurality "of" one or more "means two or more.

The above summary of the present invention is not intended to describe each disclosed embodiment or every implementation of the present invention. The following description more particularly exemplifies illustrative embodiments. At various points throughout this application, guidance is provided through a list of embodiments that can be used in various combinations. In various embodiments, the lists are provided as representative groups and should not be construed as exhaustive.

Rubber asphalt waterproof coating composition

The embodiment of the first aspect of the invention provides a rubber asphalt waterproof coating composition, which comprises the following raw material components in parts by weight: 100 parts by weight of asphalt; 19-134 parts by weight of aromatic oil; 0-24 parts of paraffin oil; 33-48 parts of hydroxyl-terminated hydrogenated polybutadiene; 0-50 parts of polyether triol; 18-22 parts of polyisocyanate; 23-212 parts of filler; 0-9 parts of silane coupling agent; 1-2 parts of polyurethane catalyst.

According to the rubber asphalt waterproof coating composition provided by the embodiment of the invention, the components play a role in synergy by controlling the types and the contents of the components, so that the rubber asphalt waterproof coating has excellent construction performance, ageing resistance and mechanical stability.

According to an embodiment of the present invention, asphalt, which is a base material of the waterproof coating material, can serve as a binder for the remaining components of the waterproof coating material and provide the waterproof coating material with waterproof and adhesive properties. The asphalt mainly comprises asphaltene, saturates, aromatics and gums.

In some embodiments, the penetration of the base asphalt ranges from 60(1/10mm) to 300(1/10 mm). The base asphalt in this penetration range has moderate hardness and resistance to shear damage, and is well compatible with the remaining components of the waterproof coating.

In order to improve the performance of the waterproof coating in combination, the asphalt may be, for example, 70# asphalt, 90# asphalt, and 200# asphalt. The asphalt of the above grade has excellent comprehensive performances such as anti-slip property, heat resistance and viscosity. Wherein, 70#, 90# and 200# represent the grades of asphalt, each grade of asphalt respectively corresponds to a specific composition, and the specific physical and chemical performance parameters are not completely the same. It can be understood that, as the grade of the asphalt increases, the penetration degree increases and the low-temperature performance is better; however, as the grade of asphalt decreases, the softening point increases and the heat resistance increases.

For example, the matrix asphalt is 90# asphalt, the softening point of the matrix asphalt is 48 ℃, and the penetration degree of the matrix asphalt is 80-100 (1/10 mm). The 90# asphalt has more excellent comprehensive performances such as anti-slip property, heat resistance, viscosity and the like. And has better compatibility with thermoplastic elastomers.

According to the embodiment of the invention, the aromatic oil and the matrix asphalt have stronger binding force, and the viscosity of the coating can be reduced to a certain degree, so that the coating keeps certain fluidity in an unheated state, can be constructed at normal temperature, does not contain volatile organic compounds in the construction and use processes, and is friendly to the environment and constructors.

Illustratively, the aromatic oil may be a general aromatic oil and an environmentally friendly aromatic oil. Aromatic oil refers to hydrocarbon with a benzene ring structure in molecules, is mainly produced by taking furfural refined extract oil as a raw material in industry, and generally contains 70-87% of aromatic hydrocarbon and 20-35% of saturated hydrocarbon. The environment-friendly aromatic oil is produced by refining the original aromatic oil to remove the toxic polycyclic aromatic hydrocarbon, and has more beneficial environment-friendly performance.

In some embodiments, the aromatic oil is 19 to 134 parts by weight, based on 100 parts by weight of the asphalt. After the aromatic oil with the content is added into the matrix asphalt to form a mixture, the penetration degree of the mixture can be properly improved, the viscosity of the coating is reduced, and the construction at normal temperature is realized.

In some embodiments, the aromatic oil is 19 to 134 parts by weight. For example, the oil part is 19 parts by weight, 50 parts by weight, 80 parts by weight, 100 parts by weight, 120 parts by weight, or 134 parts by weight. The mass of the aromatic oil may be in any combination of the above values.

According to the embodiment of the invention, the paraffin oil can improve the weather resistance of the coating material, and the volatile matter is relatively small.

The paraffin oil is a hydrocarbon mixture with 18-30 carbon atoms, and mainly comprises straight-chain paraffin, a small amount of paraffin with individual branched chains and monocyclic naphthene with long side chains.

Illustratively, the paraffinic oil may be 150 # 100, 200# 200, 300# 300, 400# 400 500 (500#), 600# 600, 650# 650 (650#)750 (750#) lube base oils, each grade corresponding to a base oil of different kinematic viscosity. It can be understood that as the grade increases, the kinematic viscosity increases, the viscosity reducing effect on the coating gradually decreases, and the addition amount required for achieving a certain viscosity gradually increases.

In some embodiments, the paraffinic oil is 0 to 24 parts by weight, based on 100 parts by weight of the bitumen. For example, the paraffin oil is 2 parts by weight, 5 parts by weight, 12 parts by weight, 15 parts by weight, 20 parts by weight, or 24 parts by weight. The paraffin oil may have any combination of the above values.

According to the embodiment of the invention, the hydroxyl-terminated hydrogenated polybutadiene is distributed in the asphalt in a molecular chain structure, so that on one hand, the temperature sensitivity of the asphalt can be improved, and the waterproof coating has good high and low temperature resistance; on the other hand, the hydroxyl-terminated hydrogenated polybutadiene and the asphalt are not subjected to phase separation, and the colloid structure and the continuous phase state of the asphalt are not changed, so that the waterproof coating keeps excellent extensibility and excellent bonding performance to a cement base layer and a coiled material.

The hydrogenated hydroxyl-terminated polybutadiene is hydrogenated hydroxyl-terminated polybutadiene, and the main chain of the hydrogenated hydroxyl-terminated polybutadiene is a saturated structure, so that the waterproof coating has good aging resistance. The hydroxyl-terminated hydrogenated polybutadiene has excellent mechanical properties, particularly hydrolysis resistance, acid and alkali resistance, wear resistance, low temperature resistance and excellent electrical insulation, has excellent compatibility with asphalt, and can effectively improve the bonding property and cohesive strength of the waterproof coating.

In some embodiments, the molecular weight of the hydroxyl-terminated hydrogenated polybutadiene is 1000-5000, for example, the hydroxyl-terminated hydrogenated polybutadiene has a number average molecular weight of 1000, 2000, 3000, 4000, or 5000, and the hydroxyl-terminated hydrogenated polybutadiene can also have a number average molecular weight in any combination of the above number average molecular weight ranges.

In some embodiments, the hydroxyl functionality of the hydroxyl-terminated hydrogenated polybutadiene is 2 and the hydroxyl content is 0.4 to 2mmol/g, for example, the hydroxyl content of the hydroxyl-terminated hydrogenated polybutadiene is 0.4mmol/g, 0.6mmol/g, 0.8mmol/g, 1.0mmol/g, 1.2mmol/g, 1.5mmol/g, 1.8mmol/g, or 2mmol/g, and the hydroxyl content of the hydroxyl-terminated hydrogenated polybutadiene can also range in any combination of the above number average molecular weight ranges.

In some embodiments, the hydroxyl-terminated hydrogenated polybutadiene ranges from 33 to 48 parts by weight, based on 100 parts by weight of the asphalt. For example, the hydroxyl-terminated hydrogenated polybutadiene is 33 parts by weight, 38 parts by weight, 40 parts by weight, 42 parts by weight, 45 parts by weight or 48 parts by weight. The mass of the hydroxyl-terminated hydrogenated polybutadiene may be any combination of the above values.

According to the embodiment of the invention, the polyether triol is a trifunctional compound, can react with the polyisocyanate and the hydroxyl-terminated hydrogenated polybutadiene to form a three-dimensional crosslinking network structure, can effectively improve the cohesive strength of the waterproof coating, and keeps good creep resistance.

In some embodiments, the polyether triol has a number average molecular weight of 3000-. For example, the number average molecular weight of the polyether triol is 3000, 4000, 5000, 6000, 7000 or 8000, and the number average molecular weight of the polyether triol may also range in any combination of the above number average molecular weight ranges.

In some embodiments, the polyether triol has a hydroxyl functionality of 2 and a hydroxyl content of 0.35 to 1 mmol/g. For example, the hydroxyl group content of the polyether triol may be 0.35mmol/g, 0.5mmol/g, 0.8mmol/g or 1mmol/g, and the hydroxyl group content of the polyether triol may be any combination of the above number average molecular weight ranges.

In some embodiments, the polyether triol is from 0 to 50 parts by weight based on 100 parts by weight of the asphalt. For example, the paraffin oil is 2 parts by weight, 10 parts by weight, 20 parts by weight, 30 parts by weight, 40 parts by weight, or 50 parts by weight. The paraffin oil may have any combination of the above values.

According to the embodiment of the invention, part of polyisocyanate reacts with hydroxyl-terminated hydrogenated polybutadiene to form a cross-linked network structure, so that the cohesive strength of the waterproof coating can be effectively improved, and good creep resistance is maintained.

Illustratively, the polyisocyanate is a mixture of one or more of diphenylmethane diisocyanate (TDI), polymethylene polyphenyl isocyanate, and modified diphenylmethane diisocyanate.

In some embodiments, the polyisocyanate is 18 to 22 parts by weight based on 100 parts by weight of the asphalt. For example, the polyisocyanate is 18 parts by weight, 19 parts by weight, 20 parts by weight, 21 parts by weight or 22 parts by weight. The polyisocyanate may also be present in any combination of the above values.

According to the embodiment of the invention, the filler is used as a reinforcing material of the waterproof coating, so that the filler can play a role of a framework, the cost can be reduced, and the ageing resistance of the waterproof coating is improved; illustratively, the filler is a mixture of one or more of talc, heavy calcium carbonate, light calcium carbonate, kaolin, attapulgite, bentonite, and silica fume.

In some embodiments, the filler is 23 to 212 parts by weight, based on 100 parts by weight of the asphalt. For example, the filler is 23 parts by weight, 50 parts by weight, 80 parts by weight, 100 parts by weight, or 212 parts by weight. The filler may also have a mass ranging between any combination of the above values.

According to the embodiment of the invention, the silane coupling agent can be combined with the framework material (filler), so that the bonding strength of the waterproof coating is effectively improved.

In some embodiments, the silane coupling agent is a mixture of one or more of gamma-aminopropyltriethoxysilane, gamma- (2, 3-glycidoxy) propyltrimethoxysilane, and gamma-methacryloxypropyltrimethoxysilane.

In some embodiments, the silane coupling agent is present in an amount of 0 to 9 parts by weight, based on 100 parts by weight of the asphalt. For example, the silane coupling agent is 1 part by weight, 2 parts by weight, 4.5 parts by weight, 6 parts by weight, or 9 parts by weight. The mass of the silane coupling agent may be in any combination of the above values.

According to the embodiment of the invention, the polyurethane catalyst can promote the polyurethane catalyst to catalyze isocyanate and hydroxyl-terminated hydrogenated polybutadiene to further react to form a cross-linked network structure, so that the cohesive strength of the waterproof coating is effectively improved, and the good creep resistance is maintained.

Illustratively, the polyurethane catalyst may be an ammonia-based catalyst and a metal-based catalyst, wherein the metal-based catalyst includes an organotin catalyst, an organozinc catalyst, an organobismuth catalyst, and the like.

According to embodiments of the present invention, the polyurethane catalyst may be an organotin catalyst, such as a mixture of one or more of dibutyltin dilaurate, stannous octoate, dibutyltin diacetate, dibutyltin bis (dodecylthio) and dibutyltin dichloride.

In some embodiments, the polyurethane catalyst is 1 to 2 parts by weight, based on 100 parts by weight of the asphalt. For example, the polyurethane catalyst is 1 part by weight or 2 parts by weight.

According to an embodiment of one aspect of the invention, the rubber asphalt waterproof coating composition comprises the following raw material components in parts by weight: 100 parts by weight of asphalt; 19-134 parts by weight of aromatic oil; 12-24 parts of paraffin oil; 33-48 parts of hydroxyl-terminated hydrogenated polybutadiene; 10-50 parts of polyether triol; 18-22 parts of polyisocyanate; 23-212 parts of filler; 4.5-9 parts by weight of a silane coupling agent; 1-2 parts of polyurethane catalyst.

The rubber asphalt waterproof coating provided by the embodiment of the invention is suitable for waterproof engineering of underground structures, subway stations, tunnels, industrial and civil building roofs and side walls, road and bridge, railways, dams, water conservancy facilities and the like, and can be compositely matched with waterproof coiled materials for use.

The rubber asphalt waterproof coating disclosed by the embodiment of the invention has certain fluidity, does not need heating treatment during construction, can be directly used for scraping construction at normal temperature, does not generate harmful substances such as smoke and the like during construction, and does not harm the environment and the health of constructors.

Preparation of rubber asphalt waterproof paint

The embodiment of the second aspect of the invention provides a preparation method of a rubber asphalt waterproof coating. The preparation method comprises the following steps:

firstly, heating and mixing asphalt, aromatic oil, paraffin oil, hydroxyl-terminated hydrogenated polybutadiene, polyether polyol and a filler according to the weight ratio of the rubber asphalt waterproof coating in the embodiment of the first aspect of the invention to obtain a first mixture;

adding polyisocyanate into the first mixture to react part of the polyisocyanate with hydroxyl-terminated hydrogenated polybutadiene and polyether triol to obtain a second mixture;

adding a polyurethane catalyst into the second mixture to enable the polyurethane catalyst to catalyze isocyanate and hydroxyl-terminated hydrogenated polybutadiene to further react to obtain a third mixture;

and step four, adding a silane coupling agent into the third mixture to prepare the waterproof coating.

It is understood that the above steps are carried out at a certain temperature to ensure smooth progress of the reaction, thereby accelerating the progress of the reaction. In the first step, the reaction temperature is 105-120 ℃; in the second step, the reaction temperature is 80-90 ℃; the reaction temperature of the third step and the fourth step is 70-75 ℃.

In some embodiments, in step one, if excess moisture is included in the components, a vacuum dehydration process may be performed after the first mixture is obtained.

The preparation method of the asphalt mastic waterproof coating provided by the embodiment of the invention has the advantages that the process is simple, the compatibility of each component is good, and the prepared asphalt mastic waterproof coating is stable in system.

Water-repellent treated building material

Embodiments of a third aspect of the present invention provide a water-repellent treated building material. The building material comprises a substrate and the rubber asphalt waterproof coating composition provided by the embodiment of the first aspect of the invention or the rubber asphalt waterproof coating composition prepared by the preparation method provided by the embodiment of the second aspect of the invention coated on the substrate.

According to the waterproof-treated building material of the embodiment of the present invention, since the rubberized asphalt waterproof coating composition provided in the embodiment of the first aspect of the present invention is applied, the building material can maintain good and stable waterproof performance for a long time in a natural environment.

Examples

The compositions and contents of the rubberized asphalt waterproofing coatings of examples 1 to 3 are shown in Table 1.

TABLE 1 Components of examples 1-3

In example 1, the filler 1 was heavy calcium carbonate, the filler 2 was kaolin, the organotin catalyst was dibutyltin dilaurate, and the polyisocyanate was diphenylmethane diisocyanate (MDI).

In example 2, the filler 1 was talc, the filler 2 was kaolin, the silane coupling agent was KH560, the organotin catalyst was dibutyltin dilaurate, and the polyisocyanate was polymethylene polyphenyl isocyanate (PAPI).

In example 3, the filler 1 was silica powder, the filler 2 was kaolin, the silane coupling agent was KH570, the organotin catalyst was stannous octoate, and the polyisocyanate was MDI.

The rubber asphalt waterproof coating is prepared by the following method according to the components of the examples 1 to 3:

(1) adding asphalt, aromatic oil, paraffin oil, hydroxyl-terminated hydrogenated polybutadiene, polyether triol, filler 1 and filler 2 into a stirring kettle, controlling the temperature to be 105 ℃ and 120 ℃, uniformly dispersing to evaporate part of water to dryness, and performing dehydration treatment;

(2) cooling to 80-85 ℃, adding polyisocyanate, and controlling the reaction temperature to 80-90 ℃;

(3) and cooling to 70-75 ℃, adding a silane coupling agent and an organic tin catalyst, and uniformly dispersing to obtain the rubber asphalt waterproof coating.

The rubber asphalt waterproof coatings prepared in examples 1 to 3 were tested according to JC/T2428-2017 industry Standard of non-cured rubber asphalt waterproof coatings, and the test results are shown in Table 2.

Table 2 test results of examples 1-3

The result shows that compared with the industry standard of JC/T2428-2017 non-cured rubber asphalt waterproof coating, the examples 1-3 have obvious advantages of the asphalt modified by hydroxyl-terminated hydrogenated polybutadiene liquid rubber, and have good bonding property, elongation property, high and low temperature resistance, thermal aging resistance, acid resistance, alkali resistance, salt resistance and the like.

Comparative example

Comparative examples 1 to 3

Comparative examples 1-3 use polyether diol instead of an equivalent amount of hydroxyl terminated hydrogenated polybutadiene, the specific components and contents are shown in Table 4.

TABLE 4 Components and amounts of comparative examples 1-3

Wherein, the filler 1, the filler 2, the silane coupling agent, the organotin catalyst and the polyisocyanate in comparative examples 1 to 3 are respectively the same as the raw material components employed in examples 1 to 3.

The raw materials of comparative examples 1 to 3 were prepared into rubberized asphalt waterproofing paints in the same manner as in examples 1 to 3.

The rubber asphalt waterproof coatings prepared in examples 1 to 3 and comparative examples 1 to 3 were visually observed for oil bleeding, particulate matter, and fineness, and the wire-pulling test was used to determine the system compatibility. The specific method comprises the following steps: and dipping the materials in the cup by using a glass rod, lifting the materials away from the object surface in the cup, allowing the materials attached to the glass rod to flow into the cup from the end of the glass rod, and observing whether the materials form a continuous drooping fine line between the end of the glass rod and the object surface in the cup. The length of the continuous guy wire that can be maintained can be observed by changing the height of the glass rod lifted to adjust the distance between the end of the glass rod and the object surface in the cup. The better the compatibility, the longer and thinner the wire formed. If there is significant phase separation of the system, the affinity at the interface between the phase domains is poor, with consequent poor adhesion, lack of necessary strength, and very prone to breakage by stretching, so that no striae can form, and the material adhering to the rod will appear to drip in the form of particles. The wire-drawing experiments of examples 1 to 3 and comparative examples 1 to 3 showed specific results as shown in Table 5.

TABLE 5 results of compatibility test of examples 1 to 3 and comparative examples 1 to 3

Item

Example 1

Example 2

Example 3

Comparative example 1

Comparative example 2

Comparative example 3

Oil penetration

Without oil leakage

Without oil leakage

Without oil leakage

Surface oil penetration

Surface oil penetration

Surface oil penetration

Particulate matter

No particulate matter

No particulate matter

No particulate matter

With particles

With particles

With particles

Degree of fineness

Is uniform and fine

Is uniform and fine

Is uniform and fine

Roughness of

Roughness of

Roughness of

Wire drawing experiment

Pulling long thin wire

Pulling long thin wire

Pulling long thin wire

Without pulling wire

Without pulling wire

Without pulling wire

The results show that the rubber asphalt waterproof coatings obtained by adopting the hydroxyl-terminated hydrogenated polybutadiene modified asphalt in the examples 1 to 3 are observed by naked eyes: no oil leakage, no particles, uniformity and fineness, and the result of the wire drawing experiment is that long thin wires are drawn. As can be seen, the hydroxyl-terminated hydrogenated polybutadiene modified asphalt adopted in examples 1-3 provides the rubber asphalt waterproof coating with good compatibility.

And the rubber asphalt waterproof paint obtained by using polyether diol to replace hydroxyl-terminated hydrogenated polybutadiene modified asphalt in the comparative examples 1-3 is observed by naked eyes: the surface is oil-permeable, has particles and is rough, and the result of the wire drawing experiment is that the wire drawing is not performed.

Comparative examples 4 to 6

Comparative examples 4 to 6 Using hydroxyl-terminated polybutadiene instead of the same amount of hydroxyl-terminated hydrogenated polybutadiene as in examples 1 to 3, rubber-asphalt waterproofing coatings of comparative examples 4 to 6 were obtained in the same manner as in examples 1 to 3, and the specific components and contents were as shown in Table 6.

TABLE 6 Components and amounts of comparative examples 4-6

Components	Comparative example 4	Comparative example 5	Comparative example 6
				Petroleum asphalt	42kg	30kg	18kg
Aromatic oil	8kg	15kg	24kg
				Paraffin oil	10kg	5kg	0kg
Hydroxyl-terminated polybutadiene	20kg	12kg	6kg
				Polyether triol	0kg	6kg	9kg
Filler 1	5kg	15kg	20kg
				Filler 2	5kg	10kg	18kg
Silane coupling agent	0kg	1.0kg	1.5kg
				Organotin catalyst	0.8kg	0.4kg	0.2kg
Polyisocyanates	9.2kg	5.6kg	3.3kg

In order to compare the differences of the aging resistance of the examples 1 to 3 and the comparative examples 4 to 6, the test was carried out according to the JC/T2428-2017 industry Standard of non-curing rubber asphalt waterproof coating. Comparative examples 4-6 the data on ductility, low temperature flexibility and stress relaxation after heat aging (70 ℃, 168h) of the modified asphalts are shown in table 7 for examples 1-3.

TABLE 7 Heat aging data for examples 1-3 and comparative examples 4-6

The results show that the rubber asphalt waterproof coatings obtained by adopting the hydroxyl-terminated hydrogenated polybutadiene modified asphalt in the examples 1 to 3 of the invention have more excellent thermal stability and aging resistance, and the performance attenuation amplitude is lower than that of the waterproof coatings adopting the hydroxyl-terminated polybutadiene modified asphalt in the comparative examples 4 to 6 in the aspects of low-temperature flexibility, extensibility and stress relaxation after the rubber asphalt waterproof coatings are subjected to thermal oxidation aging at 70 ℃.

While the invention has been described with reference to a preferred embodiment, various changes may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention, and particularly, features shown in the various embodiments may be combined in any suitable manner without departing from the scope of the invention. It is intended that the invention not be limited to the particular embodiments disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.