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

Abstract

The invention relates to the technical field of waterproof materials, and discloses a composition for an asphalt waterproof coating, the asphalt waterproof coating and a preparation method of the asphalt waterproof coating, the composition contains an auxiliary agent and a main agent, and the main agent comprises an asphalt composition, a copolymer composition, terpene resin and polypropylene wax; based on the total mass of the composition, the content of the asphalt composition is 57-70 wt%, the content of the copolymer composition 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 V-type hot-melt rubber waterproof coating provided by the invention has excellent bonding strength, tensile property and thermal aging property.

Description

Technical Field

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

[0002] The building waterproofing industry is developing rapidly, the building design is constantly innovating, the prefabricated buildings are becoming more and more mature, and the waterproof characteristics of buildings have put forward higher requirements for waterproof materials. Hot melt rubber waterproof coatings are becoming more and more popular among customers because of their low price and wide application range.

[0003] There are two main categories of hot melt rubber waterproof coatings on the market today: Class H, which is mainly used on flat surfaces, and Class V, which has a wider range of applications and can be used on facades or flat surfaces. Because some buildings or construction parts require hot melt rubber waterproof coatings to have higher bonding strength, tensile properties, and thermal aging properties, some customers have also put forward demands for products that exceed the current industry standards.

[0004] CN114921226A discloses a hot melt rubber asphalt waterproof coating. The raw materials for preparing the waterproof coating include, by weight: 60-80 parts of 90# asphalt, 5-10 parts of 200# asphalt, 5-10 parts of softener, 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 parts 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 the hot melt rubber asphalt waterproof coating has the advantages of high solid content, short curing time, water pressure resistance, one-time film formation, rapid molding, etc., the bonding strength, tensile properties and thermal aging properties of the waterproof coating in the 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 thermal aging properties of hot-melt rubber asphalt waterproof coatings in the prior art.

[0006] In order to achieve the above-mentioned object, the present invention provides 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 75wt%, wherein the main agent includes an asphalt combination, a copolymer combination, a terpene resin and a 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 the first asphalt, the second asphalt and the third asphalt in a ratio of 1:0.4-0.6:0.06-0.15; the first asphalt has a needle penetration of 65-751 / 10mm at 25°C; the second asphalt has a needle penetration of 190-2101 / 10mm at 25°C; the third asphalt has a needle penetration of ≤101 / 10mm at 25°C;

[0009] The copolymer combination is a combination of APAO, SBS and SIS in 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, comprising:

[0011] (1) subjecting each component in the asphalt combination and the terpene resin to a first mixing treatment to obtain component A;

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

[0013] (3) The component B is subjected to a third mixing treatment with an auxiliary agent 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.

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

[0016] The endpoints and any values ​​of the ranges disclosed in this article are not limited to the precise ranges or values, and these ranges or values ​​should be understood to include values ​​close to these ranges or values. For numerical ranges, the endpoint values ​​of each range, the endpoint values ​​of each range and the individual point values, and the individual point values ​​can be combined with each other to obtain one or more new numerical ranges, which should be considered as specifically disclosed in this article.

[0017] It should be noted that, in various aspects of the present invention, for the same components or terms in various aspects, the present invention is described only once in one aspect without repeated description, which should not be understood by those skilled in the art as a limitation of the present invention.

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

[0019] 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%;

[0020] The asphalt combination is a combination of the first asphalt, the second asphalt and the third asphalt in a ratio of 1:0.4-0.6:0.06-0.15; the first asphalt has a needle penetration of 65-751 / 10mm at 25°C; the second asphalt has a needle penetration of 190-2101 / 10mm at 25°C; the third asphalt has a needle penetration of ≤101 / 10mm at 25°C;

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

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

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

[0024] The 70# asphalt described in the present invention is asphalt having a needle penetration of 70±51 / 10mm at 25°C.

[0025] The 200# asphalt described in the present invention is asphalt having a needle penetration of 200±51 / 10mm at 25°C.

[0026] The SMA described in the present invention is a mixture of mastic asphalt and crushed stone.

[0027] The needle penetration of the SMA and the rock asphalt described in the present invention at 25°C is 0-51 / 10mm.

[0028] The 10# asphalt described in the present invention is asphalt having a needle penetration of ≤101 / 10mm at 25°C.

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

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

[0031] The SBS of 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 of the present invention is 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 polypropylene wax has a particle median average diameter D50 of 6-9 μm and a drop melting point of 140-160°C.

[0036] Preferably, the auxiliary agent comprises a defoamer, an anti-aging agent and a filler; based on the total mass of the composition, the content of the defoamer is 0.05-0.2wt%, the content of the anti-aging agent is 0.05-0.15wt%, and the content of the filler is 18-22wt%.

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

[0038] The present invention has no particular requirements on the specific types of the defoaming agent and the specific types of the anti-aging agent. Those skilled in the art can use various types of defoaming agents and anti-aging agents known and commonly used in the art in the scheme of the present invention; the present invention will not be described in detail here, and those skilled in the art should not interpret it as limiting the present invention.

[0039] As mentioned 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, including:

[0040] (1) subjecting each component in the asphalt combination and the terpene resin to a first mixing treatment to obtain component A;

[0041] (2) subjecting the component A to a second mixing treatment with the components in the copolymer combination and the polypropylene wax to obtain the component B;

[0042] (3) The component B is subjected to a third mixing treatment with an auxiliary agent to obtain the waterproof coating.

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

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

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

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

[0047] As mentioned 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 second aspect above.

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

[0049] 70# asphalt (first asphalt): purchased from China National Offshore Oil Corporation, trade name 70#;

[0050] 200# asphalt (second asphalt): purchased from Hebei Lunt Group Co., Ltd., trade name 200#;

[0051] SMA (third asphalt): purchased from Qingdao Guochuang New Materials Co., Ltd., the trade name is SMA-non-curing;

[0052] 10# asphalt (third asphalt): purchased from Hengli Petrochemical Co., Ltd., the trade name is 3# solid asphalt;

[0053] Rock asphalt (third asphalt): purchased from China Shenhua Coal to Oil Chemical Co., Ltd., the trade name is low-grade asphalt;

[0054] APAO: glass transition temperature is -35°C, softening point is 142°C, purchased from Liaohua Qida Chemical Co., Ltd., trade name TB1403;

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

[0056] SIS: block ratio S / I is 15:85, purchased from China Petrochemical Corporation, trade number 1105;

[0057] Terpene resin: density is 0.98g / cm 3 , molecular weight 135, purchased from Pinova Company, USA, trade name S125;

[0058] Polypropylene wax A: the particle median average diameter D50 is 7 μm, the drop melting point is 142°C, purchased from Honeywell, the trade number is 8903;

[0059] Polypropylene wax B: the particle median average diameter D50 is 6 μm, the drop melting point is 135° C., purchased from Comino New Materials Technology (Zhejiang) Co., Ltd., the trade name is NOVO formulated wax;

[0060] Defoamer: oily defoamer, purchased from Defeng Defoamer Company, trade name DF-2416;

[0061] Anti-aging agent: purchased from Chemtura, trade name F542, chemical composition: bis(2,4-di-tert-butylphenyl)pentaerythritol bis(diphosphite);

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

[0063] Example 1

[0064] This embodiment is used to illustrate the preparation method of the waterproof coating of the present invention, which includes:

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

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

[0067] (3) Component B is subjected to a third mixing treatment with a defoamer, an anti-aging agent and a filler to obtain the waterproof coating.

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

[0069] Example 2-3

[0070] The method of Example 1 is referred to, except that the formulas of the components and the process parameters are different, as shown in Tables 1 and 2 for details.

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

[0072] Example 1 Example 2 Example 3 The resulting waterproof coating is named 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 Defoaming agent, dosage / g 1 2 1 Anti-aging agent, dosage / g 1 1 1 Filler, dosage margin margin margin

[0073] Table 2

[0074]

[0075]

[0076] Example 4

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

[0078] In the second mixing process, the polypropylene wax A in Example 1 was replaced with an equal weight of polypropylene wax B.

[0079] The remaining materials and amounts are the same as those in Example 1 to obtain waterproof coating J-4.

[0080] Example 5

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

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

[0083] The rest is the same as in Example 1 to obtain waterproof coating J-5.

[0084] Comparative Example 1

[0085] This comparative example was carried out with reference to the method of Example 1, except that:

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

[0087] The amounts of the remaining substances are the same as those in Example 1 to obtain a waterproof coating DJ-1.

[0088] Comparative Example 2

[0089] This comparative example was carried out with reference to the method of Example 1, except that:

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

[0091] The amounts of the remaining substances are the same as those in Example 1 to obtain a waterproof coating DJ-2.

[0092] Comparative Example 3

[0093] This comparative example was carried out with reference to the method of Example 1, except that:

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

[0095] The dosage of the remaining substances is the same as that in Example 1 to obtain a new waterproof coating DJ-3.

[0096] Comparative Example 4

[0097] This comparative example was carried out with reference to the method of Example 1, except that:

[0098] In the first mixing process, the third asphalt is not added in this comparative example, and the amount of the first asphalt is adjusted to 430 g. The amounts of the remaining substances are the same as in Example 1, and a waterproof coating DJ-4 is obtained.

[0099] Comparative Example 5

[0100] This comparative example was carried out with reference to the method of Example 1, except that:

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

[0102] The amounts of the remaining substances are the same as those in Example 1 to obtain a waterproof coating DJ-5.

[0103] Test Case

[0104] The bonding strength, elongation at break and elongation at break after thermal aging of the waterproof coating prepared in the example were tested with reference to the provisions of JC / T 2678-2022 standard. 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 membrane provided by the present invention has the characteristics of good bonding strength, tensile properties and thermal aging properties.

[0108] The preferred embodiments of the present invention are described in detail above, but the present invention is not limited thereto. Within the technical concept of the present invention, the technical solution of the present invention can be subjected to a variety of simple modifications, including the combination of various technical features in any other suitable manner, and these simple modifications and combinations should also be regarded as the contents disclosed by the present invention and belong to the protection scope of the present invention.

Claims

1. A composition for a 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 75wt%, wherein the main agent includes an asphalt combination, a copolymer combination, a terpene resin and a polypropylene wax; 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%; The asphalt combination is a combination of the first asphalt, the second asphalt and the third asphalt in a ratio of 1:0.4-0.6:0.06-0.15; the first asphalt has a needle penetration of 65-751 / 10mm at 25°C; the second asphalt has a needle penetration of 190-2101 / 10mm at 25°C; the third asphalt has a needle penetration of ≤101 / 10mm at 25°C; The copolymer combination is a combination of APAO, SBS and SIS in a weight ratio of 1:1.2-1.6:0.1-0.

5.

2. The composition according to claim 1, characterized in that The content of the first asphalt is 35-42wt%, the content of the second asphalt is 19-23wt%, and the content of the third asphalt is 3-5wt%; 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, characterized in that The APAO has a glass transition temperature of -40°C to -30°C and a softening point of 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, the content of APAO is 2-3wt%, the content of SBS is 3-5wt%, and the content of SIS is 0.5-1wt%.

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

5. The composition according to any one of claims 1 to 4, characterized in that The auxiliary agents include defoamers, anti-aging agents and fillers; Based on the total weight of the composition, the content of the defoamer is 0.05-0.2wt%, the content of the anti-aging agent is 0.05-0.15wt%, and the content of the filler is 18-22wt%.

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

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

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

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

Images