Composition for asphalt waterproof coating, waterproof coating and preparation method thereof

Abstract

The present invention relates to the technical field of waterproof materials, and discloses a composition for asphalt waterproof coatings, an asphalt waterproof coating and a preparation method thereof. The composition contains an auxiliary agent and a main agent. The main agent includes an asphalt combination, a copolymer combination, terpene resin and polypropylene wax. Based on the total mass of the composition, the content of the asphalt combination is 57-70 wt%, the content of the copolymer combination is 5.5-9 wt%, the content of the terpene resin is 8-11 wt%, and the content of the polypropylene wax is 1.5-3.5 wt%. The Class V hot-melt rubber waterproof coating provided by the present invention has excellent bonding strength, tensile properties and heat aging properties.

Description

Technical Field

[0001] The present invention relates to the technical field of waterproof materials, and particularly relates to a composition for asphalt waterproof coating, an asphalt waterproof coating and a preparation method thereof. Background Art

[0002] The construction waterproofing industry is developing rapidly with continuous innovation in building design and increasing maturity of prefabricated buildings. Higher requirements are put forward for the waterproof characteristics of buildings on waterproof materials. Due to the low price and wide application range of hot-melt rubber waterproof coatings, they are increasingly favored by customers.

[0003] Currently, the hot-melt rubber waterproof coatings on the market are mainly classified into two categories. One is the H type, mainly applied to flat base surfaces, and the other is the V type with a wider application range, which can be used for vertical or flat base surfaces. Due to some buildings or building parts requiring high bonding strength, tensile properties, and heat aging properties of the hot-melt rubber waterproof coating, some customers also have demands for products higher than the current industry standards.

[0004] CN114921226A discloses a hot-melt rubber asphalt waterproof coating. By weight, the raw materials for preparing the waterproof coating include: 60 - 80 parts of 90# asphalt, 5 - 10 parts of 200# asphalt, 5 - 10 parts of softening agent, 3 - 8 parts of polyethylene wax, 12 - 16 parts of star-shaped SBS, 1 - 3 parts of SSBR, 10 - 15 parts of rubber powder, 0.05 - 0.1 part of rubber activator, 1 - 5 parts of hyperbranched polymer, 5 - 10 parts of APAO, 5 - 9 parts of C9 petroleum resin, and 10 - 15 parts of filler. Although this hot-melt rubber asphalt waterproof coating has the advantages of high solid content, short curing time, water pressure resistance, one-time film formation, and rapid molding, the bonding strength, tensile properties, and heat aging properties of the waterproof coating in this prior art need to be further improved. Summary of the Invention

[0005] The purpose of the present invention is to overcome the problems of poor bonding strength, tensile properties, and heat aging properties of the hot-melt rubber asphalt waterproof coating existing in the prior art.

[0006] To achieve the above purpose, on the one hand, the present invention provides a composition for V-type hot-melt rubber asphalt waterproof coating, characterized in that the composition contains an auxiliary agent and a main agent with a content of not less than 75wt%, and the main agent includes an asphalt combination, a copolymer combination, terpene resin, and polypropylene wax;

[0007] Based on the total mass of the composition, the content of the asphalt combination is 57 - 70wt%, the content of the copolymer combination is 5.5 - 9wt%, the content of the terpene resin is 8 - 11wt%, and the content of the polypropylene wax is 1.5 - 3.5wt%;

[0008] The asphalt combination is a combination of a first asphalt, a second asphalt, and a third asphalt in a ratio of 1:0.4 - 0.6:0.06 - 0.15; and the first asphalt has a penetration at 25°C of 65 - 75 1 / 10 mm; the second asphalt has a penetration at 25°C of 190 - 210 1 / 10 mm; the third asphalt has a penetration at 25°C of ≤10 1 / 10 mm;

[0009] The copolymer combination is a combination of APAO, SBS, and SIS with a weight ratio of 1:1.2 - 1.6:0.1 - 0.5.

[0010] The second aspect of the present invention provides a method for preparing a Class V hot-melt rubber asphalt waterproof coating, which is carried out using the components in the composition described in the first aspect above, including:

[0011] (1) Perform a first mixing treatment on the components in the asphalt combination and terpene resin to obtain Component A;

[0012] (2) Perform a second mixing treatment on Component A with the components in the copolymer combination and polypropylene wax to obtain Component B;

[0013] (3) Perform a third mixing treatment on Component B with additives to obtain the waterproof coating.

[0014] The third aspect of the present invention provides a Class V hot-melt rubber asphalt waterproof coating prepared by the method described in the second aspect above.

[0015] The Class V hot-melt rubber asphalt waterproof coating provided by the present invention has excellent bonding strength, tensile properties, and heat aging properties; it can be applied to various building parts, and at the same time, the production process and raw materials of this waterproof coating do not contain organic solvents, have no pungent odor, and are green and environmentally friendly. Detailed Embodiments

[0016] In the ranges disclosed herein, the endpoints and any values are not limited to the exact ranges or values, and these ranges or values should be understood to include values close to these ranges or values. For numerical ranges, between the endpoint values of each range, between the endpoint values of each range and individual point values, and between individual point values, they can be combined with each other to obtain one or more new numerical ranges, and these numerical ranges should be regarded as specifically disclosed herein.

[0017] It should be noted that in each aspect of the present invention, for the same components or terms in each aspect, the present invention only describes them once in one aspect without repeating the description. Those skilled in the art should not understand this as a limitation of the present invention.

[0018] As described above, the first aspect of the present invention provides a composition for a Class V hot-melt rubber asphalt waterproof coating, which composition contains an auxiliary agent and a main agent with a content of not less than 75 wt%. The main agent includes an asphalt combination, a copolymer combination, terpene resin, and polypropylene wax;

[0019] Based on the total mass of the composition, the content of the asphalt combination is 57 - 70 wt%, the content of the copolymer combination is 5.5 - 9 wt%, the content of the terpene resin is 8 - 11 wt%, and the content of the polypropylene wax is 1.5 - 3.5 wt%;

[0020] The asphalt combination is a combination of a first asphalt, a second asphalt, and a third asphalt in a ratio of 1:0.4 - 0.6:0.06 - 0.15; and the first asphalt has a penetration at 25°C of 65 - 75 1 / 10 mm; the second asphalt has a penetration at 25°C of 190 - 210 1 / 10 mm; the third asphalt has a penetration at 25°C of ≤10 1 / 10 mm;

[0021] The copolymer combination is a combination of APAO, SBS, and SIS with a weight ratio of 1:1.2 - 1.6:0.1 - 0.5.

[0022] According to a preferred specific embodiment, the content of the first asphalt is 35 - 42 wt%, the content of the second asphalt is 19 - 23 wt%, and the content of the third asphalt is 3 - 5 wt%.

[0023] Preferably, the first asphalt is 70# asphalt; the second asphalt is 200# asphalt; the third asphalt is at least one of SMA, 10# asphalt, and rock asphalt.

[0024] The 70# asphalt in the present invention is an asphalt with a penetration at 25°C of 70 ± 5 1 / 10 mm.

[0025] The 200# asphalt in the present invention is an asphalt with a penetration at 25°C of 200 ± 5 1 / 10 mm.

[0026] The SMA in the present invention is asphalt mastic asphalt mixture.

[0027] The SMA and the rock asphalt in the present invention both have a penetration at 25°C of 0 - 5 1 / 10 mm.

[0028] The 10# asphalt in the present invention is an asphalt with a penetration at 25°C of ≤10 1 / 10 mm.

[0029] The APAO in the present invention is an amorphous α-olefin copolymer.

[0030] Preferably, the glass transition temperature of the APAO is -40°C to -30°C, and the softening point is 130 - 145°C.

[0031] The SBS in the present invention is a styrene-butadiene-styrene block copolymer. Particularly preferably, the block ratio S / B of the SBS is 1:3 - 4.

[0032] The SIS in the present invention is a polystyrene-polyisoprene-polystyrene. Particularly preferably, the block ratio S / I of the SIS is 1:4 - 6.

[0033] Preferably, the density of the terpene resin is ≤0.98 g / cm 3 .

[0034] Preferably, the molecular weight of the terpene resin is 130 - 145.

[0035] Preferably, the median average diameter D50 of the polypropylene wax particles is 6 - 9 μm, and the dropping melting point is 140 - 160°C.

[0036] Preferably, the additives include defoamers, anti-aging agents, and fillers; based on the total mass of the composition, the content of the defoamer is 0.05 - 0.2 wt%, the content of the anti-aging agent is 0.05 - 0.15 wt%, and the content of the filler is 18 - 22 wt%.

[0037] Particularly preferably, the filler in the additives is at least one of talc powder, bentonite, and calcium carbonate.

[0038] The present invention has no particular requirements for the specific types of the defoamer and the anti-aging agent. Those skilled in the art can use various types of defoamers and anti-aging agents known and commonly used in the art in the solution of the present invention; the present invention will not elaborate herein, and those skilled in the art should not understand it as a limitation to the present invention.

[0039] As described above, the second aspect of the present invention provides a method for preparing a Class V hot-melt rubber asphalt waterproof coating, which is carried out using the components in the composition described in the first aspect above, including:

[0040] (1) Perform a first mixing treatment on the components in the asphalt combination and the terpene resin to obtain Component A;

[0041] (2) Perform a second mixing treatment on Component A, the components in the copolymer combination, and the polypropylene wax to obtain Component B;

[0042] (3) Perform a third mixing treatment on Component B and the additives to obtain the waterproof coating.

[0043] Particularly preferably, in step (2), the second mixing treatment is carried out under vacuum conditions. Further preferably, the pressure of the second mixing treatment is 10 5 -10 3 Pa.

[0044] Preferably, in step (1), the conditions of the first mixing treatment include: the reaction temperature is 155 - 165 °C.

[0045] Further preferably, in step (2), the conditions of the second mixing treatment include: the reaction temperature is 172 - 183 °C, the stirring rate is 800 - 1000 rpm, and the reaction time is 150 - 180 min.

[0046] Preferably, in step (3), the conditions of the third mixing treatment include: the reaction temperature is 172 - 183 °C, the stirring rate is 800 - 1000 rpm, and the reaction time is 50 - 60 min.

[0047] As described above, the third aspect of the present invention provides a Class V hot-melt rubber asphalt waterproof coating prepared by the method described in the foregoing second aspect.

[0048] The present invention will be described in detail below by way of examples. In the following examples, unless otherwise specified, various instruments and raw materials used are commercially available products.

[0049] 70# asphalt (the first asphalt): purchased from Zhonghai Asphalt Co., Ltd., with the commercial brand number 70#;

[0050] 200# asphalt (the second asphalt): purchased from Hebei Rent Group Co., Ltd., with the commercial brand number 200#;

[0051] SMA (the third asphalt): purchased from Qingdao Guochuang New Materials Co., Ltd., with the commercial brand number SMA - non-curing;

[0052] 10# asphalt (the third asphalt): purchased from Hengli Petrochemical Co., Ltd., with the commercial brand number 3# solid asphalt;

[0053] Rock asphalt (the third asphalt): purchased from China Shenhua Coal-to-Liquid and Chemical Co., Ltd., with the commercial brand number low-grade asphalt;

[0054] APAO: the glass transition temperature is -35 °C, and the softening point is 142 °C, purchased from Liaohua Qida Chemical Co., Ltd., with the commercial brand number TB1403;

[0055] SBS: the block ratio (weight ratio of structural units) S / B is 25:75, purchased from LG Chemical (Tianjin) Engineering Plastics Co., Ltd., with the commercial brand number LG411S;

[0056] SIS: The block ratio S / I is 15:85, purchased from China National Petroleum and Chemical Corporation, and the commercial brand is 1105;

[0057] Terpene resin: The density is 0.98 g / cm 3 , the molecular weight is 135, purchased from Pinova Company in the United States, and the commercial brand is S125;

[0058] Polypropylene wax A: The median average particle diameter D50 is 7 μm, and the dropping melting point is 142 °C, purchased from Honeywell Company, and the commercial brand is 8903;

[0059] Polypropylene wax B: The median average particle diameter D50 is 6 μm, and the dropping melting point is 135 °C, purchased from Comino New Materials Technology (Zhejiang) Co., Ltd., and the commercial brand is NOVO modulated wax;

[0060] Defoamer: Oil-based defoamer, purchased from Defeng Defoamer Company, and the commercial brand is DF-2416;

[0061] Antioxidant: Purchased from Chemtura Company, the commercial brand is F542, and the chemical composition is bis(2,4-di-tert-butylphenyl)pentaerythritol bis(diphosphite);

[0062] Filler: Talc powder, bentonite, calcium carbonate, purchased from Jiangxi Guangyuan Sales Co., Ltd., Shanghai Huayuan Century Trading Co., Ltd., and Lingshou County Baiyi Mineral Products Processing Factory respectively, and the commercial mesh numbers (China standard sieve, taking the undersize) are 1500 mesh, 800 mesh, and 800 mesh respectively.

[0063] Example 1

[0064] This example is used to illustrate the preparation method of the waterproof coating described in the present invention, including:

[0065] (1) Perform the first mixing treatment on the first asphalt, the second asphalt, the third asphalt, and the terpene resin to obtain component A;

[0066] (2) Under the state of vacuum negative pressure (pressure is 10 4 Pa), perform the second mixing treatment on component A with APAO, SBS, SIS, and polypropylene wax to obtain component B;

[0067] (3) Perform the third mixing treatment on component B with the defoamer, antioxidant, and filler to obtain the waterproof coating.

[0068] The specific formula used is shown in Table 1, and the specific process parameters used are shown in Table 2.

[0069] Examples 2 - 3

[0070] It is carried out according to the method of Example 1, except that the formulations and process parameters of each component are different, as specifically listed in Table 1 and Table 2.

[0071] Table 1 (total mass of waterproof coating is 1000 g)

[0072] Example 1 Example 2 Example 3 Name of the obtained waterproof coating J-1 J-2 J-3 First asphalt, dosage / g 390 420 350 Second asphalt, dosage / g 200 190 205 Third asphalt Type SMA 10# asphalt Rock asphalt Dosage / g 40 30 50 APAO, dosage / g 25 20 30 SBS, dosage / g 40 30 45 SIS, dosage / g 10 10 5 Terpene resin, dosage / g 90 80 100 Polypropylene wax Type Polypropylene wax A Polypropylene wax A Polypropylene wax A Dosage / g 20 15 30 Defoamer, dosage / g 1 2 1 Anti-aging agent, dosage / g 1 1 1 Filler, dosage Remainder Remainder Remainder

[0073] Table 2

[0074]

[0075]

[0076] Example 4

[0077] This example is carried out according to the method of Example 1, except that:

[0078] In the second mixing process, polypropylene wax B of equal weight is used to replace polypropylene wax A in Example 1.

[0079] The other substances and their dosages are the same as those in Example 1, and waterproof coating J-4 is obtained.

[0080] Example 5

[0081] This example is carried out according to the method of Example 1, except that:

[0082] In the second mixing process, vacuum negative pressure conditions are not adopted, but it is carried out under normal pressure.

[0083] The rest is the same as in Example 1, and waterproof coating J-5 is obtained.

[0084] Comparative Example 1

[0085] This comparative example is carried out according to the method of Example 1, except that:

[0086] In the first mixing process, the dosage of the second asphalt in this comparative example is 150 g, and at the same time, the dosage of the filler is adjusted so that the total mass of the waterproof coating is 1000 g.

[0087] The dosages of the other substances are the same as those in Example 1, and waterproof coating DJ-1 is obtained.

[0088] Comparative Example 2

[0089] This comparative example is carried out according to the method of Example 1, except that:

[0090] In the second mixing process, APAO is not added in this comparative example, and at the same time, the dosage of the filler is adjusted so that the total mass of the waterproof coating is 1000 g.

[0091] The dosages of the other substances are the same as those in Example 1, and waterproof coating DJ-2 is obtained.

[0092] Comparative Example 3

[0093] This comparative example was carried out according to the method of Example 1, the difference being that:

[0094] In the second mixing process, the dosage of SBS in this comparative example was 45 g, and the dosage of SIS was 5 g.

[0095] The dosages of the other substances are the same as those in Example 1, and new waterproof coating DJ-3 is obtained.

[0096] Comparative Example 4

[0097] This comparative example was carried out according to the method of Example 1, the difference being that:

[0098] In the first mixing process, no third asphalt was added in this comparative example, and at the same time, the dosage of the first asphalt was adjusted to 430 g. The dosages of the other substances are the same as those in Example 1, and waterproof coating DJ-4 is obtained.

[0099] Comparative Example 5

[0100] This comparative example was carried out according to the method of Example 1, the difference being that:

[0101] In the first mixing process, the dosage of the second asphalt was 150 g, and the dosage of the third asphalt was 90 g.

[0102] The dosages of the other substances are the same as those in Example 1, and waterproof coating DJ-5 is obtained.

[0103] Test Example

[0104] With reference to the provisions in the JC / T 2678-2022 standard, the bond strength, elongation at break, and elongation at break after heat aging of the waterproof coatings prepared in the examples were tested, and the experimental results are shown in Table 3.

[0105] Table 3

[0106]

[0107] It can be seen from the results in Table 3 that the waterproof coiled material provided by the present invention has the characteristics of good bond strength, tensile properties, and heat aging properties.

[0108] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited thereto. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solutions of the present invention, including any other suitable combination of each technical feature. These simple modifications and combinations should also be regarded as the content disclosed by the present invention and fall within the protection scope of the present invention.

Claims

1. A composition for Class V hot-melt rubber asphalt waterproof coating, characterized in that, The composition contains an auxiliary agent and a main agent with a content of not less than 75 wt%, and the main agent includes an asphalt combination, a copolymer combination, terpene resin, and polypropylene wax; Based on the total mass of the composition, the content of the asphalt combination is 57 - 70 wt%, the content of the copolymer combination is 5.5 - 9 wt%, the content of the terpene resin is 8 - 11 wt%, and the content of the polypropylene wax is 1.5 - 3.5 wt%; The asphalt combination is a combination of a first asphalt, a second asphalt, and a third asphalt with a weight ratio of 1:0.4 - 0.6:0.06 - 0.15; and the penetration of the first asphalt at 25°C is 65 - 75 1 / 10 mm; the penetration of the second asphalt at 25°C is 190 - 210 1 / 10 mm; the penetration of the third asphalt at 25°C is ≤10 1 / 10 mm; The copolymer combination is a combination of APAO, SBS, and SIS with a content weight ratio of 1:1.2 - 1.6:0.1 - 0.

5.

2. The composition according to claim 1, wherein Based on the total mass of the composition, the content of the first asphalt is 35 - 42 wt%, the content of the second asphalt is 19 - 23 wt%, and the content of the third asphalt is 3 - 5 wt%; And / or, the first asphalt is 70# asphalt; the second asphalt is 200# asphalt; the third asphalt is at least one of SMA, 10# asphalt, and rock asphalt.

3. The composition according to claim 1, wherein The glass transition temperature of the APAO is -40°C to -30°C, and the softening point is 130 - 145°C; And / or, the block ratio S / B of the SBS is 1:3 - 4; And / or, the block ratio S / I of the SIS is 1:4 - 6; And / or, based on the total mass of the composition, the content of the APAO is 2 - 3 wt%, the content of the SBS is 3 - 4.5 wt%, and the content of the SIS is 0.5 - 1 wt%.

4. The composition according to claim 1, wherein The density of the terpene resin ≤ 0.98 g / cm 3 ; And / or, the median average diameter D50 of the polypropylene wax particles is 6 - 9 μm, and the dropping melting point is 140 - 160°C.

5. The composition according to any one of claims 1-4, characterized in that, The auxiliary agent includes an antifoaming agent, an anti-aging agent, and a filler; Based on the total mass of the composition, the content of the antifoaming agent is 0.05 - 0.2 wt%, the content of the anti-aging agent is 0.05 - 0.15 wt%, and the content of the filler is 18 - 22 wt%.

6. The composition according to claim 5, wherein The filler in the auxiliary agent is at least one of talc powder, bentonite, and calcium carbonate.

7. A method for preparing Class V hot-melt rubber asphalt waterproof coating, characterized in that, This method is carried out using the components in the composition according to any one of claims 1 - 6, and includes: (1) Perform a first mixing treatment on the components in the asphalt combination and the terpene resin to obtain component A; (2) Perform a second mixing treatment on the component A with the components in the copolymer combination and the polypropylene wax to obtain component B; (3) Perform a third mixing treatment on the component B with the auxiliary agent to obtain the waterproof coating.

8. The method according to claim 7, wherein In step (2), the second mixing treatment is carried out under vacuum conditions.

9. The method according to claim 7 or 8, characterized in that In step (1), the conditions of the first mixing treatment include: the reaction temperature is 155 - 165°C; And / or, in step (2), the conditions for the second mixing treatment include: reaction temperature is 172 - 183 °C, stirring rate is 800 - 1000 rpm, and reaction time is 150 - 180 min; And / or, in step (3), the conditions for the third mixing treatment include: reaction temperature is 172 - 183 °C, stirring rate is 800 - 1000 rpm, and reaction time is 50 - 60 min.

10. Class V hot-melt rubber asphalt waterproof coating prepared by the method according to any one of claims 7 - 9.

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