Non-cured rubber asphalt waterproof coiled material and preparation method thereof

Abstract

The invention relates to the technical field of building waterproof materials, and particularly discloses a non-cured rubber asphalt waterproof coiled material and a preparation method thereof.The non-cured rubber asphalt waterproof coiled material comprises a tire base layer, non-cured rubber asphalt layers coating the two faces of the tire base layer, and isolating membrane layers compounded on the surfaces of the non-cured rubber asphalt layers; the non-cured rubber asphalt layer is prepared from the following raw materials: matrix asphalt, a rubber modifier, liquid tackifying resin, a functional aid, sodium bentonite and a plasticizer; the preparation method comprises the following steps: coating two surfaces of a tire base layer with a non-cured rubber asphalt material to obtain a non-cured rubber asphalt layer, and then coating the surface of the non-cured rubber asphalt layer with an isolating membrane layer to obtain the required non-cured rubber asphalt waterproof coiled material, the preparation method disclosed by the invention is simple, and the obtained non-cured rubber asphalt waterproof coiled material has excellent adhesive property, creep property, self-healing property, construction property and durability, and meets the high-performance requirements of modern buildings on waterproof materials.

Description

Technical Field

[0001] The invention relates to the technical field of building waterproof materials, and more specifically, to a non-curing rubber asphalt waterproof coiled material and a preparation method thereof. Background Art

[0002] Waterproofing membrane is an important part of the waterproofing system of construction projects, and its performance directly affects the durability and service life of the building. SBS modified asphalt waterproofing membrane is a rollable sheet waterproofing membrane made of asphalt with styrene-butadiene-styrene (SBS) thermoplastic elastomer as a modifier as an impregnating and coating material, polyester fiber non-woven fabrics, jute cloth, glass fiber felt, etc. as the base, and plastic film as the anti-sticking isolation layer. SBS modified asphalt waterproofing membrane has good high temperature resistance and can be used in the temperature range of -25 to +100℃. It has high elasticity and fatigue resistance, as well as an elongation of up to 150% and strong puncture resistance and tear resistance. It is suitable for waterproofing projects in cold areas, as well as industrial and civil buildings with large deformation and vibration.

[0003] However, due to the large differences in material properties between SBS and asphalt, SBS and asphalt are only physically mixed after mixing, and are prone to segregation at high temperatures, with poor compatibility; and SBS modified asphalt is very prone to embrittlement and aging under the influence of environmental factors such as heat, oxygen, and light, resulting in unstable performance and reduced durability of SBS modified asphalt waterproofing membranes. Existing SBS modified asphalt waterproofing membranes lack self-healing ability after being damaged, which easily leads to leakage and waterproofing failure.

[0004] As the construction industry's requirements for waterproof material performance continue to increase, the market is in urgent need of a new type of waterproof roll that can overcome the shortcomings of existing SBS modified asphalt waterproof rolls. Based on the above statement, the present invention provides a non-curing rubber asphalt waterproof roll and a preparation method thereof. Summary of the invention

[0005] In order to overcome the shortcomings of the existing SBS modified asphalt waterproofing membrane, the present invention provides a non-curing rubber asphalt waterproofing membrane and a preparation method thereof.

[0006] In a first aspect, the present invention provides a non-curing rubber asphalt waterproofing membrane, which adopts the following technical solution:

[0007] A non-curing rubber asphalt waterproofing roll material, comprising a tread base layer, a non-curing rubber asphalt layer coated on both sides of the tread base layer, and an isolation film layer compounded on the surface of the non-curing rubber asphalt layer;

[0008] The non-cured rubber asphalt layer comprises the following raw materials in parts by weight: 50-70 parts of base asphalt, 12-18 parts of rubber modifier, 8-12 parts of liquid tackifying resin, 5-10 parts of functional additive, 5-10 parts of sodium bentonite, and 1-3 parts of plasticizer.

[0009] Preferably, the non-cured rubber asphalt layer comprises the following raw materials in parts by weight: 60 parts of base asphalt, 15 parts of rubber modifier, 10 parts of liquid tackifying resin, 8 parts of functional additive, 8 parts of sodium bentonite, and 2 parts of plasticizer.

[0010] Preferably, the tire base layer is one of polyester felt, glass fiber felt, and glass fiber reinforced polyester felt.

[0011] Preferably, the isolation film layer is a polyethylene film.

[0012] Preferably, the base asphalt is No. 70 asphalt or No. 90 asphalt.

[0013] Preferably, the rubber modifier is prepared by the following method:

[0014] (1) Add styrene and butadiene to a reaction kettle, stir and mix, add an initiator and heat to 100-140° C., maintain the reaction for 3-5 hours, add a functional monomer, and continue the reaction for 1-2 hours to obtain a polymer product;

[0015] (2) Cooling the polymerization product to 60-80° C., adding white carbon black and an antioxidant, and stirring to mix evenly to obtain a rubber modifier.

[0016] Preferably, in step (1), the mass ratio of styrene to butadiene is 3-5:5-7.

[0017] Preferably, the amount of the initiator added in step (1) is 0.5-2% of the total mass of styrene and butadiene.

[0018] Preferably, the initiator in step (1) is benzoyl peroxide or azobisisobutyronitrile.

[0019] Preferably, the amount of the functional monomer added in step (1) is 5-12% of the total mass of styrene and butadiene.

[0020] Preferably, the functional monomers in step (1) include methyl methacrylate, 3-(N,N-dimethylamino)ethyl acrylate and N-succinimidyl-N-methylcarbamate in a mass ratio of 5-7:2-3:1.

[0021] Preferably, the mass ratio of the polymerization product in step (2), white carbon black and antioxidant is 10:1-4:0.5-1.5.

[0022] Preferably, the antioxidant in step (2) is butylated hydroxyanisole and / or 2,6-di-tert-butyl-p-cresol.

[0023] Preferably, the liquid tackifying resin is prepared by the following method:

[0024] Stir castor oil modified polyol with polyvinyl alcohol and carboxymethyl cellulose at 60-80°C, add isocyanate and amine catalyst while stirring, raise the temperature to 90-100°C, keep the temperature for reaction for 2-4h, and after the reaction is completed, cool to room temperature to obtain the product.

[0025] Preferably, the mass ratio of the castor oil-modified polyol, polyvinyl alcohol, carboxymethyl cellulose, isocyanate and amine catalyst is 30-40:5-8:1-3:30-50:0.1-0.3.

[0026] Preferably, the isocyanate comprises hexamethylene diisocyanate and tetramethyl-m-xylylene diisocyanate in a mass ratio of 1.5-2:0.8-1.2.

[0027] Preferably, the amine catalyst is at least one of triethylenediamine, N,N-diethylethylamine and dimethylethanolamine.

[0028] Preferably, the functional auxiliary agent is cyclopentasiloxane and / or α-hydrogen-ω-hydroxy-polydimethylsiloxane.

[0029] Preferably, the functional auxiliary agent comprises cyclopentasiloxane and α-hydrogen-ω-hydroxy-polydimethylsiloxane in a mass ratio of 2-4:1.

[0030] Preferably, the plasticizer is polyisobutylene.

[0031] In a second aspect, the present invention provides a method for preparing a non-curing rubber asphalt waterproofing membrane, which adopts the following technical solution:

[0032] A method for preparing a non-curing rubber asphalt waterproofing membrane comprises the following preparation steps:

[0033] S1. Weigh the raw material base asphalt of the non-cured rubber asphalt layer, rubber modifier, liquid tackifying resin, functional additive, sodium bentonite, and plasticizer by weight and set aside;

[0034] S2. Heat the base asphalt to 150-160°C, keep it warm and stir for 10-30 minutes, add rubber modifier, liquid tackifying resin, functional additive, sodium bentonite, plasticizer, stir and mix for 1-2 hours, and then shear it at a speed of 3000-5000r / min for 20-40 minutes to obtain a non-cured rubber asphalt material;

[0035] S3. Apply the non-curing rubber asphalt material on both sides of the tire base to obtain a non-curing rubber asphalt layer, and then cover the surface of the non-curing rubber asphalt layer with an isolation film layer to obtain the required non-curing rubber asphalt waterproof membrane.

[0036] Preferably, the non-curing rubber asphalt waterproof membrane has a nominal thickness of 3-5 mm.

[0037] In summary, the present invention has the following beneficial effects:

[0038] The present invention adopts base asphalt, rubber modifier, liquid tackifying resin, functional additive, sodium bentonite and plasticizer to prepare non-curing rubber asphalt material. By heating, insulating and stirring the base asphalt, its fluidity is improved and uniform mixing with other components is promoted. After mixing, high-speed shearing further increases the uniformity of the material. By coating the non-curing rubber asphalt material on both sides of the tire base to obtain a non-curing rubber asphalt layer, and then covering the surface of the non-curing rubber asphalt layer with an isolation film layer, it can effectively avoid environmental factors from affecting the waterproof performance and ensure the durability of the waterproof roll. The preparation method of the present invention is simple. The obtained non-curing rubber asphalt waterproof roll has excellent bonding performance, can adapt to the slight deformation of the base layer, ensure good combination with the base material, and prevent moisture penetration; excellent creep performance, can effectively absorb stress from the base layer; excellent self-healing performance, can automatically repair after suffering slight damage and restore waterproof performance; superior construction performance, can reduce construction difficulty and improve construction efficiency; excellent durability performance, can maintain good physical and chemical properties under the action of various environmental factors, extend service life, and meet the high performance requirements of modern buildings for waterproof materials.

[0039] The invention adopts petroleum asphalt as the basic material of the waterproof coiled material to provide waterproof performance and structural strength; functional monomers are added in the polymerization process of styrene and butadiene, and the obtained rubber modifier can significantly improve the elasticity and weather resistance of the waterproof coiled material, so that the waterproof coiled material can adapt to temperature changes and mechanical stress; the introduction of the functional monomers can significantly enhance the compatibility of SBS with petroleum asphalt and reduce the segregation phenomenon; methyl acrylate, 3-(N,N-dimethylamino)ethyl acrylate and N-succinimidyl-N-methylcarbamate are used together as functional monomers, and the three monomers can introduce a cross-linking structure through different chemical reaction mechanisms (such as free radical polymerization), thereby improving the cross-linking degree of the polymer, and further improving the mechanical strength, thermal stability and aging resistance of the material; different monomer selection can also provide additional chemical reaction sites, further enhancing the compatibility of SBS with petroleum asphalt; the introduction of white carbon black and antioxidants can interact with polymer chains, improve the bonding performance, heat resistance and tensile strength of the material, and extend the service life.

[0040] The invention prepares the liquid tackifying resin by reacting castor oil-modified polyol, polyvinyl alcohol, carboxymethyl cellulose, isocyanate and amine catalyst, and the liquid tackifying resin can effectively improve the bonding performance with the base layer, ensure the sealing performance of the waterproof coiled material, and the liquid tackifying resin has good fluidity and can realize self-healing at the micro-damage. The addition of polyvinyl alcohol and carboxymethyl cellulose can significantly improve the bonding performance of the liquid tackifying resin. The isocyanate is selected from hexamethylene diisocyanate and tetramethyl meta-xylylene diisocyanate, which effectively promotes the cross-linking reaction and enhances the peeling strength and durability of the material.

[0041] The present invention helps to improve the elasticity of the material by adding functional additives such as cyclopentasiloxane and α-hydrogen-ω-hydroxy-polydimethylsiloxane, so that the non-curing rubber asphalt layer can better restore its original state when subjected to force and temperature changes, reduce the occurrence of cracks and breakage, and improve its tear resistance, so that it can better resist external impact and stretching during use; the introduction of functional additives can promote the self-healing mechanism of the material through fluidity and lubrication when tiny cracks are formed, help restore the waterproof performance, and extend the service life; the siloxane functional additive also has good UV resistance and chemical corrosion resistance, which helps to improve the stability and reliability of the non-curing rubber asphalt layer under various environmental conditions. DETAILED DESCRIPTION

[0042] The present invention is further described in detail below with reference to the embodiments.

[0043] Unless otherwise specified, the materials, reagents, etc. used in the present invention can be obtained from commercial sources.

[0044] Among them, the tire base is long-fiber polyester tire, purchased from Hebei Jinliu Chemical Fiber Co., Ltd.;

[0045] The isolation film layer is a polyethylene film with a thickness of 0.4 mm, purchased from Dezhou Zhengyu Geotechnical Materials Co., Ltd.

[0046] The base asphalt was No. 70 asphalt purchased from Foshan Gaofu PetroChina Fuel Asphalt Co., Ltd.;

[0047] White carbon black: model BTH-1, mesh number 325, purchased from Lingshou County Baixin New Material Technology Co., Ltd.;

[0048] Castor oil modified polyol: model THCM-523, purchased from Guangzhou Chubu Chemical Co., Ltd.;

[0049] Polyvinyl alcohol: content 99%, purchased from Hubei Shineng Chemical Technology Co., Ltd.;

[0050] Carboxymethyl cellulose: content 99%, purchased from Hubei Shineng Chemical Technology Co., Ltd.;

[0051] Sodium bentonite: content 94%, specification 50 μm, purchased from Lingshou County Malin Mineral Products Processing Plant.

[0052] Preparation Examples 1-3 and Comparative Preparation Examples 1-2 provide methods for preparing rubber modifiers.

[0053] Preparation Example 1

[0054] The rubber modifier is prepared by the following method:

[0055] (1) The mass ratio of styrene to butadiene is controlled to be 3:5, styrene and butadiene are added to a reactor, stirred and mixed at a speed of 400 r / min for 20 minutes, an initiator is added and heated to 100° C., the reaction is maintained for 5 hours, a functional monomer is added, and the reaction is continued for 1 hour to obtain a polymerization product, wherein the amount of the initiator added is 0.5% of the total mass of styrene and butadiene, the initiator is benzoyl peroxide, the amount of the functional monomer added is 5% of the total mass of styrene and butadiene, and the functional monomer includes methyl methacrylate, 3-(N,N-dimethylamino)ethyl acrylate and N-succinimidyl-N-methylcarbamate in a mass ratio of 5:2:1;

[0056] (2) The mass ratio of the polymerization product, white carbon black and antioxidant is controlled to be 10:1:0.5, the polymerization product is cooled to 60° C., white carbon black and antioxidant are added and stirred to mix evenly to obtain a rubber modifier, wherein the antioxidant is butylated hydroxyanisole.

[0057] Preparation Example 2

[0058] The rubber modifier is prepared by the following method:

[0059] (1) The mass ratio of styrene to butadiene is controlled to be 2:3, styrene and butadiene are added to a reactor, stirred and mixed at a speed of 500 r / min for 15 minutes, an initiator is added and heated to 120° C., the reaction is maintained for 4 hours, a functional monomer is added, and the reaction is continued for 1.5 hours to obtain a polymerization product, wherein the amount of the initiator added is 1.2% of the total mass of styrene and butadiene, the initiator is azobisisobutyronitrile, the amount of the functional monomer added is 8% of the total mass of styrene and butadiene, and the functional monomer includes methyl methacrylate, 3-(N,N-dimethylamino)ethyl acrylate and N-succinimidyl-N-methylcarbamate in a mass ratio of 6:2.5:1;

[0060] (2) The mass ratio of the polymerization product, white carbon black and antioxidant is controlled to be 10:2.5:1, the polymerization product is cooled to 70° C., white carbon black and antioxidant are added and stirred to mix evenly to obtain a rubber modifier, wherein the antioxidant is 2,6-di-tert-butyl-p-cresol.

[0061] Preparation Example 3

[0062] The rubber modifier is prepared by the following method:

[0063] (1) The mass ratio of styrene to butadiene is controlled to be 5:7, styrene and butadiene are added to a reactor, stirred and mixed at a speed of 600 r / min for 10 minutes, an initiator is added and heated to 140° C., the reaction is maintained for 3 hours, a functional monomer is added, and the reaction is continued for 2 hours to obtain a polymerization product, wherein the amount of the initiator added is 2% of the total mass of styrene and butadiene, the initiator is benzoyl peroxide, the amount of the functional monomer added is 12% of the total mass of styrene and butadiene, and the functional monomer includes methyl methacrylate, 3-(N,N-dimethylamino)ethyl acrylate and N-succinimidyl-N-methylcarbamate in a mass ratio of 7:3:1;

[0064] (2) The mass ratio of the polymerization product, white carbon black and the antioxidant is controlled to be 10:4:1.5, the polymerization product is cooled to 80° C., white carbon black and the antioxidant are added and stirred to mix evenly to obtain a rubber modifier, wherein the antioxidant is butylated hydroxyanisole.

[0065] Comparative Preparation Example 1

[0066] The rubber modifier is prepared by the following method:

[0067] (1) controlling the mass ratio of styrene to butadiene to be 3:5, adding styrene and butadiene into a reactor, stirring and mixing at a speed of 400 r / min for 20 min, adding an initiator and heating to 100° C., maintaining the reaction for 5 h, adding a functional monomer, and continuing the reaction for 1 h to obtain a polymerization product, wherein the amount of the initiator added is 0.5% of the total mass of styrene and butadiene, the initiator is benzoyl peroxide, the amount of the functional monomer added is 5% of the total mass of styrene and butadiene, and the functional monomer includes methyl methacrylate and 3-(N,N-dimethylamino)ethyl acrylate in a mass ratio of 5:3;

[0068] (2) The mass ratio of the polymerization product, white carbon black and antioxidant is controlled to be 10:1:0.5, the polymerization product is cooled to 60° C., white carbon black and antioxidant are added and stirred to mix evenly to obtain a rubber modifier, wherein the antioxidant is butylated hydroxyanisole.

[0069] Comparative Preparation Example 2

[0070] The rubber modifier is prepared by the following method:

[0071] (1) The mass ratio of styrene to butadiene is controlled to be 3:5, styrene and butadiene are added to a reactor, stirred and mixed at a speed of 400 r / min for 20 minutes, an initiator is added and heated to 100° C., the reaction is maintained for 5 hours, a functional monomer is added, and the reaction is continued for 1 hour to obtain a polymerization product, wherein the amount of the initiator added is 0.5% of the total mass of styrene and butadiene, the initiator is benzoyl peroxide, the amount of the functional monomer added is 5% of the total mass of styrene and butadiene, and the functional monomer includes methacrylate and N-succinimidyl-N-methylcarbamate in a mass ratio of 5:3;

[0072] (2) The mass ratio of the polymerization product, white carbon black and antioxidant is controlled to be 10:1:0.5, the polymerization product is cooled to 60° C., white carbon black and antioxidant are added and stirred to mix evenly to obtain a rubber modifier, wherein the antioxidant is butylated hydroxyanisole.

[0073] Preparation Examples 4-6 and Comparative Preparation Examples 3-4 provide methods for preparing liquid tackifying resins.

[0074] Preparation Example 4

[0075] Liquid tackifying resin is prepared by the following method:

[0076] Castor oil modified polyol, polyvinyl alcohol and carboxymethyl cellulose are stirred and mixed at a temperature of 60°C and a speed of 300r / min for 30min, and then isocyanate and amine catalyst are added while stirring, and the temperature is raised to 90°C and kept for reaction for 4h. After the reaction is completed, the mixture is cooled to room temperature to obtain the product; wherein the mass ratio of castor oil modified polyol, polyvinyl alcohol, carboxymethyl cellulose, isocyanate and amine catalyst is 30:5:1:30:0.1; isocyanate includes hexamethylene diisocyanate and tetramethyl-m-xylene diisocyanate in a mass ratio of 1.5:0.8; and the amine catalyst is triethylenediamine.

[0077] Preparation Example 5

[0078] Liquid tackifying resin is prepared by the following method:

[0079] Castor oil modified polyol, polyvinyl alcohol and carboxymethyl cellulose are stirred and mixed at a temperature of 70°C and a speed of 400r / min for 20min, and then isocyanate and amine catalyst are added while stirring, and the temperature is raised to 95°C and kept for reaction for 3h. After the reaction is completed, the mixture is cooled to room temperature to obtain a product; wherein the mass ratio of castor oil modified polyol, polyvinyl alcohol, carboxymethyl cellulose, isocyanate and amine catalyst is 35:6.5:2:40:0.2; isocyanate includes hexamethylene diisocyanate and tetramethyl-m-xylene diisocyanate in a mass ratio of 1.8:1; and the amine catalyst is N,N-diethylethylamine.

[0080] Preparation Example 6

[0081] Liquid tackifying resin is prepared by the following method:

[0082] Castor oil modified polyol, polyvinyl alcohol and carboxymethyl cellulose are stirred and mixed at a temperature of 80°C and a speed of 500r / min for 10 minutes, and then isocyanate and amine catalyst are added while stirring. The temperature is raised to 100°C and the reaction is kept warm for 2 hours. After the reaction is completed, the mixture is cooled to room temperature to obtain a product; wherein the mass ratio of castor oil modified polyol, polyvinyl alcohol, carboxymethyl cellulose, isocyanate and amine catalyst is 40:8:3:50:0.3; the isocyanate includes hexamethylene diisocyanate and tetramethyl-m-xylene diisocyanate in a mass ratio of 2:1.2; and the amine catalyst is dimethylethanolamine.

[0083] Comparative Preparation Example 3

[0084] Liquid tackifying resin is prepared by the following method:

[0085] After the castor oil-modified polyol is stirred at a speed of 300 r / min for 30 minutes, isocyanate and amine catalyst are added while stirring, the temperature is raised to 90°C, and the reaction is kept warm for 4 hours. After the reaction is completed, the polyol is cooled to room temperature to obtain the product; wherein the mass ratio of the castor oil-modified polyol, isocyanate and amine catalyst is 36:30:0.1; the isocyanate includes hexamethylene diisocyanate and tetramethyl-m-xylene diisocyanate in a mass ratio of 1.5:0.8; and the amine catalyst is triethylenediamine.

[0086] Comparative Preparation Example 4

[0087] Liquid tackifying resin is prepared by the following method:

[0088] Castor oil-modified polyol, polyvinyl alcohol and carboxymethyl cellulose are stirred and mixed at a temperature of 60°C and a speed of 300r / min for 30min, and then isocyanate and amine catalyst are added while stirring. The temperature is raised to 90°C and the reaction is kept warm for 4h. After the reaction is completed, the mixture is cooled to room temperature to obtain the product; wherein the mass ratio of castor oil-modified polyol, polyvinyl alcohol, carboxymethyl cellulose, isocyanate and amine catalyst is 30:5:1:30:0.1; the isocyanate is hexamethylene diisocyanate; and the amine catalyst is triethylenediamine.

[0089] Embodiment 1-3 provides a non-curing rubber asphalt waterproofing membrane and a preparation method thereof.

[0090] Example 1

[0091] A non-curing rubber asphalt waterproofing roll material, comprising a tread base layer, a non-curing rubber asphalt layer coated on both sides of the tread base layer, and an isolation film layer compounded on the surface of the non-curing rubber asphalt layer;

[0092] Among them, the non-cured rubber asphalt layer includes the following raw materials in parts by weight: 50 parts of base asphalt, 12 parts of rubber modifier, 8 parts of liquid tackifying resin, 5 parts of functional additive, 5 parts of sodium bentonite, and 1 part of plasticizer; the rubber modifier is prepared by Preparation Example 1; the liquid tackifying resin is prepared by Preparation Example 4; the functional additive includes cyclopentasiloxane and α-hydrogen-ω-hydroxy-polydimethylsiloxane in a mass ratio of 2:1; the plasticizer is polyisobutylene.

[0093] A method for preparing a non-curing rubber asphalt waterproofing membrane comprises the following steps:

[0094] S1. Weigh the raw material base asphalt of the non-cured rubber asphalt layer, rubber modifier, liquid tackifying resin, functional additive, sodium bentonite, and plasticizer by weight and set aside;

[0095] S2. Heat the base asphalt to 150°C, stir and maintain the mixture at a speed of 300 r / min for 30 min, add rubber modifier, liquid tackifying resin, functional additive, sodium bentonite and plasticizer, continue stirring and mixing for 2 h, and then shear at a speed of 3000 r / min for 40 min to obtain a non-cured rubber asphalt material;

[0096] S3. Dip-coat the non-curing rubber asphalt material on both sides of the tire base to obtain a non-curing rubber asphalt layer, control the coating thickness to be 0.15 mm, and shape it after natural cooling. Then, cover the surface of the non-curing rubber asphalt layer with an isolation film layer to obtain the required non-curing rubber asphalt waterproof membrane.

[0097] Example 2

[0098] A non-curing rubber asphalt waterproofing roll material, comprising a tread base layer, a non-curing rubber asphalt layer coated on both sides of the tread base layer, and an isolation film layer compounded on the surface of the non-curing rubber asphalt layer;

[0099] Among them, the non-cured rubber asphalt layer includes the following raw materials in parts by weight: 60 parts of base asphalt, 15 parts of rubber modifier, 10 parts of liquid tackifying resin, 8 parts of functional additive, 8 parts of sodium bentonite, and 2 parts of plasticizer; the rubber modifier is prepared by Preparation Example 2; the liquid tackifying resin is prepared by Preparation Example 5; the functional additive includes cyclopentasiloxane and α-hydrogen-ω-hydroxy-polydimethylsiloxane in a mass ratio of 3:1; the plasticizer is polyisobutylene.

[0100] A method for preparing a non-curing rubber asphalt waterproofing membrane comprises the following steps:

[0101] S1. Weigh the raw material base asphalt of the non-cured rubber asphalt layer, rubber modifier, liquid tackifying resin, functional additive, sodium bentonite, and plasticizer by weight and set aside;

[0102] S2. Heat the base asphalt to 155°C, stir at a speed of 400 r / min for 20 min, add rubber modifier, liquid tackifying resin, functional additive, sodium bentonite and plasticizer, continue stirring and mixing for 1.5 h, and then shear at a speed of 4000 r / min for 30 min to obtain a non-cured rubber asphalt material;

[0103] S3. Dip-coat the non-curing rubber asphalt material on both sides of the tire base to obtain a non-curing rubber asphalt layer, control the coating thickness to 0.25 mm, and shape it after natural cooling. Then, cover the surface of the non-curing rubber asphalt layer with an isolation film layer to obtain the required non-curing rubber asphalt waterproof membrane.

[0104] Example 3

[0105] A non-curing rubber asphalt waterproofing roll material, comprising a tread base layer, a non-curing rubber asphalt layer coated on both sides of the tread base layer, and an isolation film layer compounded on the surface of the non-curing rubber asphalt layer;

[0106] Among them, the non-cured rubber asphalt layer includes the following raw materials in parts by weight: 70 parts of base asphalt, 18 parts of rubber modifier, 12 parts of liquid tackifying resin, 10 parts of functional additive, 10 parts of sodium bentonite, and 3 parts of plasticizer; the rubber modifier is prepared by Preparation Example 3; the liquid tackifying resin is prepared by Preparation Example 6; the functional additive includes cyclopentasiloxane and α-hydrogen-ω-hydroxy-polydimethylsiloxane in a mass ratio of 4:1; the plasticizer is polyisobutylene.

[0107] A method for preparing a non-curing rubber asphalt waterproofing membrane comprises the following steps:

[0108] S1. Weigh the raw material base asphalt of the non-cured rubber asphalt layer, rubber modifier, liquid tackifying resin, functional additive, sodium bentonite, and plasticizer by weight and set aside;

[0109] S2. Heat the base asphalt to 160°C, stir and maintain the mixture at a speed of 500 r / min for 10 min, add the rubber modifier, liquid tackifying resin, functional additive, sodium bentonite and plasticizer, continue stirring and mixing for 1 h, and then shear at a speed of 5000 r / min for 20 min to obtain a non-cured rubber asphalt material;

[0110] S3. Dip-coat the non-curing rubber asphalt material on both sides of the tire base to obtain a non-curing rubber asphalt layer, control the coating thickness to 0.35 mm, and shape it after natural cooling. Then, cover the surface of the non-curing rubber asphalt layer with an isolation film layer to obtain the required non-curing rubber asphalt waterproof membrane.

[0111] In order to verify the comprehensive performance of the non-cured rubber asphalt waterproof membrane prepared in Examples 1-3 of the present invention, the applicant set up comparative examples 1-6, which are as follows:

[0112] Comparative Example 1

[0113] A non-curing rubber asphalt waterproofing roll material, comprising a tread base layer, a non-curing rubber asphalt layer coated on both sides of the tread base layer, and an isolation film layer compounded on the surface of the non-curing rubber asphalt layer;

[0114] Among them, the non-cured rubber asphalt layer includes the following raw materials in parts by weight: 50 parts of base asphalt, 12 parts of rubber modifier, 8 parts of liquid tackifying resin, 5 parts of functional additive, 5 parts of sodium bentonite, and 1 part of plasticizer; the rubber modifier is prepared by comparative preparation example 1; the liquid tackifying resin is prepared by preparation example 4; the functional additive includes cyclopentasiloxane and α-hydrogen-ω-hydroxy-polydimethylsiloxane in a mass ratio of 2:1; the plasticizer is polyisobutylene.

[0115] A method for preparing a non-curing rubber asphalt waterproofing membrane comprises the following steps:

[0116] S1. Weigh the raw material base asphalt of the non-cured rubber asphalt layer, rubber modifier, liquid tackifying resin, functional additive, sodium bentonite, and plasticizer by weight and set aside;

[0117] S2. Heat the base asphalt to 150°C, stir and maintain the mixture at a speed of 300 r / min for 30 min, add rubber modifier, liquid tackifying resin, functional additive, sodium bentonite and plasticizer, continue stirring and mixing for 2 h, and then shear at a speed of 3000 r / min for 40 min to obtain a non-cured rubber asphalt material;

[0118] S3. Dip-coat the non-curing rubber asphalt material on both sides of the tire base to obtain a non-curing rubber asphalt layer, control the coating thickness to be 0.15 mm, and shape it after natural cooling. Then, cover the surface of the non-curing rubber asphalt layer with an isolation film layer to obtain the required non-curing rubber asphalt waterproof membrane.

[0119] Comparative Example 2

[0120] A non-curing rubber asphalt waterproofing roll material, comprising a tread base layer, a non-curing rubber asphalt layer coated on both sides of the tread base layer, and an isolation film layer compounded on the surface of the non-curing rubber asphalt layer;

[0121] Among them, the non-cured rubber asphalt layer includes the following raw materials in parts by weight: 50 parts of base asphalt, 12 parts of rubber modifier, 8 parts of liquid tackifying resin, 5 parts of functional additive, 5 parts of sodium bentonite, and 1 part of plasticizer; the rubber modifier is prepared by Comparative Preparation Example 2; the liquid tackifying resin is prepared by Preparation Example 4; the functional additive includes cyclopentasiloxane and α-hydrogen-ω-hydroxy-polydimethylsiloxane in a mass ratio of 2:1; the plasticizer is polyisobutylene.

[0122] A method for preparing a non-curing rubber asphalt waterproofing membrane comprises the following steps:

[0123] S1. Weigh the raw material base asphalt of the non-cured rubber asphalt layer, rubber modifier, liquid tackifying resin, functional additive, sodium bentonite, and plasticizer by weight and set aside;

[0124] S2. Heat the base asphalt to 150°C, stir and maintain the mixture at a speed of 300 r / min for 30 min, add rubber modifier, liquid tackifying resin, functional additive, sodium bentonite and plasticizer, continue stirring and mixing for 2 h, and then shear at a speed of 3000 r / min for 40 min to obtain a non-cured rubber asphalt material;

[0125] S3. Dip-coat the non-curing rubber asphalt material on both sides of the tire base to obtain a non-curing rubber asphalt layer, control the coating thickness to be 0.15 mm, and shape it after natural cooling. Then, cover the surface of the non-curing rubber asphalt layer with an isolation film layer to obtain the required non-curing rubber asphalt waterproof membrane.

[0126] Comparative Example 3

[0127] A non-curing rubber asphalt waterproofing roll material, comprising a tread base layer, a non-curing rubber asphalt layer coated on both sides of the tread base layer, and an isolation film layer compounded on the surface of the non-curing rubber asphalt layer;

[0128] Among them, the non-cured rubber asphalt layer includes the following raw materials in parts by weight: 50 parts of base asphalt, 12 parts of rubber modifier, 8 parts of liquid tackifying resin, 5 parts of functional additive, 5 parts of sodium bentonite, and 1 part of plasticizer; the rubber modifier is prepared by Preparation Example 1; the liquid tackifying resin is prepared by Comparative Preparation Example 3; the functional additive includes cyclopentasiloxane and α-hydrogen-ω-hydroxy-polydimethylsiloxane in a mass ratio of 2:1; the plasticizer is polyisobutylene.

[0129] A method for preparing a non-curing rubber asphalt waterproofing membrane comprises the following steps:

[0130] S1. Weigh the raw material base asphalt of the non-cured rubber asphalt layer, rubber modifier, liquid tackifying resin, functional additive, sodium bentonite, and plasticizer by weight and set aside;

[0131] S2. Heat the base asphalt to 150°C, stir and maintain the mixture at a speed of 300 r / min for 30 min, add rubber modifier, liquid tackifying resin, functional additive, sodium bentonite and plasticizer, continue stirring and mixing for 2 h, and then shear at a speed of 3000 r / min for 40 min to obtain a non-cured rubber asphalt material;

[0132] S3. Dip-coat the non-curing rubber asphalt material on both sides of the tire base to obtain a non-curing rubber asphalt layer, control the coating thickness to be 0.15 mm, and shape it after natural cooling. Then, cover the surface of the non-curing rubber asphalt layer with an isolation film layer to obtain the required non-curing rubber asphalt waterproof membrane.

[0133] Comparative Example 4

[0134] A non-curing rubber asphalt waterproofing roll material, comprising a tread base layer, a non-curing rubber asphalt layer coated on both sides of the tread base layer, and an isolation film layer compounded on the surface of the non-curing rubber asphalt layer;

[0135] Among them, the non-cured rubber asphalt layer includes the following raw materials in parts by weight: 50 parts of base asphalt, 12 parts of rubber modifier, 8 parts of liquid tackifying resin, 5 parts of functional additive, 5 parts of sodium bentonite, and 1 part of plasticizer; the rubber modifier is prepared by Preparation Example 1; the liquid tackifying resin is prepared by Comparative Preparation Example 4; the functional additive includes cyclopentasiloxane and α-hydrogen-ω-hydroxy-polydimethylsiloxane in a mass ratio of 2:1; the plasticizer is polyisobutylene.

[0136] A method for preparing a non-curing rubber asphalt waterproofing membrane comprises the following steps:

[0137] S1. Weigh the raw material base asphalt of the non-cured rubber asphalt layer, rubber modifier, liquid tackifying resin, functional additive, sodium bentonite, and plasticizer by weight and set aside;

[0138] S2. Heat the base asphalt to 150°C, stir and maintain the mixture at a speed of 300 r / min for 30 min, add rubber modifier, liquid tackifying resin, functional additive, sodium bentonite and plasticizer, continue stirring and mixing for 2 h, and then shear at a speed of 3000 r / min for 40 min to obtain a non-cured rubber asphalt material;

[0139] S3. Dip-coat the non-curing rubber asphalt material on both sides of the tire base to obtain a non-curing rubber asphalt layer, control the coating thickness to be 0.15 mm, and shape it after natural cooling. Then, cover the surface of the non-curing rubber asphalt layer with an isolation film layer to obtain the required non-curing rubber asphalt waterproof membrane.

[0140] Comparative Example 5

[0141] A non-curing rubber asphalt waterproofing roll material, comprising a tread base layer, a non-curing rubber asphalt layer coated on both sides of the tread base layer, and an isolation film layer compounded on the surface of the non-curing rubber asphalt layer;

[0142] Among them, the non-cured rubber asphalt layer includes the following raw materials in parts by weight: 50 parts of base asphalt, 12 parts of rubber modifier, 8 parts of liquid tackifying resin, 5 parts of functional additive, 5 parts of sodium bentonite, and 1 part of plasticizer; the rubber modifier is prepared by Preparation Example 1; the liquid tackifying resin is prepared by Preparation Example 4; the functional additive is cyclopentasiloxane; and the plasticizer is polyisobutylene.

[0143] A method for preparing a non-curing rubber asphalt waterproofing membrane comprises the following steps:

[0144] S1. Weigh the raw material base asphalt of the non-cured rubber asphalt layer, rubber modifier, liquid tackifying resin, functional additive, sodium bentonite, and plasticizer by weight and set aside;

[0145] S2. Heat the base asphalt to 150°C, stir and maintain the mixture at a speed of 300 r / min for 30 min, add rubber modifier, liquid tackifying resin, functional additive, sodium bentonite and plasticizer, continue stirring and mixing for 2 h, and then shear at a speed of 3000 r / min for 40 min to obtain a non-cured rubber asphalt material;

[0146] S3. Dip-coat the non-curing rubber asphalt material on both sides of the tire base to obtain a non-curing rubber asphalt layer, control the coating thickness to be 0.15 mm, and shape it after natural cooling. Then, cover the surface of the non-curing rubber asphalt layer with an isolation film layer to obtain the required non-curing rubber asphalt waterproof membrane.

[0147] Comparative Example 6

[0148] A non-curing rubber asphalt waterproofing roll material, comprising a tread base layer, a non-curing rubber asphalt layer coated on both sides of the tread base layer, and an isolation film layer compounded on the surface of the non-curing rubber asphalt layer;

[0149] Among them, the non-cured rubber asphalt layer includes the following raw materials in parts by weight: 50 parts of base asphalt, 12 parts of rubber modifier, 8 parts of liquid tackifying resin, 5 parts of functional additive, 5 parts of sodium bentonite, and 1 part of plasticizer; the rubber modifier is prepared by Preparation Example 1; the liquid tackifying resin is prepared by Preparation Example 4; the functional additive is α-hydrogen-ω-hydroxy-polydimethylsiloxane; and the plasticizer is polyisobutylene.

[0150] A method for preparing a non-curing rubber asphalt waterproofing membrane comprises the following steps:

[0151] S1. Weigh the raw material base asphalt of the non-cured rubber asphalt layer, rubber modifier, liquid tackifying resin, functional additive, sodium bentonite, and plasticizer by weight and set aside;

[0152] S2. Heat the base asphalt to 150°C, stir and maintain the mixture at a speed of 300 r / min for 30 min, add rubber modifier, liquid tackifying resin, functional additive, sodium bentonite and plasticizer, continue stirring and mixing for 2 h, and then shear at a speed of 3000 r / min for 40 min to obtain a non-cured rubber asphalt material;

[0153] S3. Dip-coat the non-curing rubber asphalt material on both sides of the tire base to obtain a non-curing rubber asphalt layer, control the coating thickness to be 0.15 mm, and shape it after natural cooling. Then, cover the surface of the non-curing rubber asphalt layer with an isolation film layer to obtain the required non-curing rubber asphalt waterproof membrane.

[0154] Performance Testing

[0155] The comprehensive properties of the non-cured rubber asphalt waterproof membranes prepared in Examples 1-3 of the present invention and Comparative Examples 1-6 were tested respectively, as follows:

[0156] Tensile performance: The tensile performance test was carried out according to the method in the national standard GB / T 328.8-2007 "Test methods for building waterproof membranes Part 8: Tensile properties of asphalt waterproof membranes", and the maximum longitudinal tensile force (N / 50mm) was measured;

[0157] Low temperature flexibility: refer to the national standard GB / T 328.14-2007 "Test methods for building waterproof membranes Part 14: Low temperature flexibility of asphalt waterproof membranes" to conduct low temperature flexibility test and measure the low temperature flexibility (℃);

[0158] Heat aging performance: Test the maximum longitudinal tensile force (N / 50mm) and low temperature flexibility (℃) after heat aging treatment at 80℃ for 168h;

[0159] Cement peeling strength: Cement peeling strength test was carried out according to the method in national standard GB / T 35467-2017 "Wet-laid waterproofing membrane", and the cement peeling strength (N / mm) was measured;

[0160] Joint peeling strength: The joint peeling strength test was carried out according to the method in the national standard GB / T 328.20-2007 "Test methods for building waterproof membranes Part 20: Peeling performance of bitumen waterproof membrane joints", and the joint peeling strength (N / mm) was measured;

[0161] Waterproof performance: Waterproof performance test is carried out according to the method in the national standard GB / T 328.10-2007 "Test methods for building waterproof membranes Part 10: Waterproof performance of asphalt and polymer waterproof membranes";

[0162] The measurement results are shown in Table 1.

[0163] Table 1:

[0164]

[0165] It can be seen from the data shown in Table 1 above that the comprehensive performance of the non-cured rubber asphalt waterproof membrane prepared in Examples 1-3 is significantly better than that of Comparative Examples 1-6, and has obvious advantages in tensile properties, heat resistance, peel strength, low-temperature flexibility and impermeability, and has broad market prospects.

[0166] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed. However, as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

Claims

1. A non-curing rubber asphalt waterproofing membrane, characterized in that: It includes a tire base layer, a non-curing rubber asphalt layer coated on both sides of the tire base layer, and a separation film layer compounded on the surface of the non-curing rubber asphalt layer; The non-cured rubber asphalt layer comprises the following raw materials in parts by weight: 50-70 parts of base asphalt, 12-18 parts of rubber modifier, 8-12 parts of liquid tackifying resin, 5-10 parts of functional additive, 5-10 parts of sodium bentonite, and 1-3 parts of plasticizer.

2. The non-curing rubber asphalt waterproofing membrane according to claim 1, characterized in that: The rubber modifier is prepared by the following method: (1) Add styrene and butadiene to a reaction kettle, stir and mix, add an initiator and heat to 100-140° C., maintain the reaction for 3-5 hours, add a functional monomer, and continue the reaction for 1-2 hours to obtain a polymer product; (2) Cooling the polymerization product to 60-80° C., adding white carbon black and an antioxidant, and stirring to mix evenly to obtain a rubber modifier.

3. The non-curing rubber asphalt waterproofing membrane according to claim 2, characterized in that: In the step (1), the mass ratio of styrene to butadiene is 3-5:5-7; the amount of the initiator added is 0.5-2% of the total mass of styrene and butadiene; the amount of the functional monomer added is 5-12% of the total mass of styrene and butadiene; The mass ratio of the polymerization product in step (2), white carbon black and antioxidant is 10:1-4:0.5-1.

5.

4. The non-curing rubber asphalt waterproofing membrane according to claim 2, characterized in that: The functional monomers in step (1) include methyl methacrylate, 3-(N,N-dimethylamino)ethyl acrylate and N-succinimidyl-N-methylcarbamate in a mass ratio of 5-7:2-3:

1.

5. The non-curing rubber asphalt waterproofing membrane according to claim 1, characterized in that: The liquid tackifying resin is prepared by the following method: Stir castor oil modified polyol with polyvinyl alcohol and carboxymethyl cellulose at 60-80°C, add isocyanate and amine catalyst while stirring, raise the temperature to 90-100°C, keep the temperature for reaction for 2-4h, and after the reaction is completed, cool to room temperature to obtain the product.

6. The non-curing rubber asphalt waterproofing membrane according to claim 5, characterized in that: The mass ratio of the castor oil modified polyol, polyvinyl alcohol, carboxymethyl cellulose, isocyanate and amine catalyst is 30-40:5-8:1-3:30-50:0.1-0.

3.

7. The non-curing rubber asphalt waterproofing membrane according to claim 5, characterized in that: The isocyanate comprises hexamethylene diisocyanate and tetramethyl meta-xylylene diisocyanate in a mass ratio of 1.5-2:0.8-1.

2.

8. The non-curing rubber asphalt waterproofing membrane according to claim 1, characterized in that: The functional auxiliary agent is cyclopentasiloxane and / or α-hydrogen-ω-hydroxy-polydimethylsiloxane.

9. The non-curing rubber asphalt waterproofing membrane according to claim 8, characterized in that: The functional auxiliary agent comprises cyclopentasiloxane and α-hydrogen-ω-hydroxy-polydimethylsiloxane in a mass ratio of 2-4:

1.

10. A method for preparing the non-curing rubber asphalt waterproofing membrane according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1. Weigh the raw material base asphalt of the non-cured rubber asphalt layer, rubber modifier, liquid tackifying resin, functional additive, sodium bentonite, and plasticizer by weight and set aside; S2. Heat the base asphalt to 150-160°C, keep it warm and stir for 10-30 minutes, add rubber modifier, liquid tackifying resin, functional additive, sodium bentonite, plasticizer, stir and mix for 1-2 hours, and then shear it at a speed of 3000-5000r / min for 20-40 minutes to obtain a non-cured rubber asphalt material; S3. Apply the non-curing rubber asphalt material on both sides of the tire base to obtain a non-curing rubber asphalt layer, and then cover the surface of the non-curing rubber asphalt layer with an isolation film layer to obtain the required non-curing rubber asphalt waterproof membrane.

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