CN114196324A - Water-emulsion type rubber asphalt waterproof coating and preparation method thereof - Google Patents
Water-emulsion type rubber asphalt waterproof coating and preparation method thereof Download PDFInfo
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- CN114196324A CN114196324A CN202111612757.2A CN202111612757A CN114196324A CN 114196324 A CN114196324 A CN 114196324A CN 202111612757 A CN202111612757 A CN 202111612757A CN 114196324 A CN114196324 A CN 114196324A
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- 239000010426 asphalt Substances 0.000 title claims abstract description 101
- 238000000576 coating method Methods 0.000 title claims abstract description 63
- 239000011248 coating agent Substances 0.000 title claims abstract description 57
- 239000000839 emulsion Substances 0.000 title claims abstract description 35
- 229920001971 elastomer Polymers 0.000 title claims abstract description 23
- 238000002360 preparation method Methods 0.000 title abstract description 6
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims abstract description 60
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 41
- 229920000126 latex Polymers 0.000 claims abstract description 32
- 229920001084 poly(chloroprene) Polymers 0.000 claims abstract description 32
- 239000004816 latex Substances 0.000 claims abstract description 31
- 229910000019 calcium carbonate Inorganic materials 0.000 claims abstract description 30
- 239000002562 thickening agent Substances 0.000 claims abstract description 27
- 239000002736 nonionic surfactant Substances 0.000 claims abstract description 26
- 239000003755 preservative agent Substances 0.000 claims abstract description 26
- 230000002335 preservative effect Effects 0.000 claims abstract description 26
- 239000003381 stabilizer Substances 0.000 claims abstract description 26
- 239000002518 antifoaming agent Substances 0.000 claims abstract description 18
- 239000000463 material Substances 0.000 claims abstract description 14
- 239000003208 petroleum Substances 0.000 claims abstract description 13
- 229920002635 polyurethane Polymers 0.000 claims description 14
- 239000004814 polyurethane Substances 0.000 claims description 14
- 239000001913 cellulose Substances 0.000 claims description 9
- 229920002678 cellulose Polymers 0.000 claims description 9
- JPMIIZHYYWMHDT-UHFFFAOYSA-N octhilinone Chemical compound CCCCCCCCN1SC=CC1=O JPMIIZHYYWMHDT-UHFFFAOYSA-N 0.000 claims description 7
- 239000007864 aqueous solution Substances 0.000 claims description 4
- 238000004945 emulsification Methods 0.000 claims description 4
- 238000002156 mixing Methods 0.000 claims description 4
- 239000003973 paint Substances 0.000 claims description 4
- 239000011387 rubberized asphalt concrete Substances 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 3
- 229920001296 polysiloxane Polymers 0.000 claims description 3
- 229920003171 Poly (ethylene oxide) Polymers 0.000 claims description 2
- 239000006185 dispersion Substances 0.000 claims description 2
- -1 polyoxyethylene Polymers 0.000 claims description 2
- 238000004078 waterproofing Methods 0.000 claims 3
- 229920005862 polyol Polymers 0.000 claims 1
- 150000003077 polyols Chemical class 0.000 claims 1
- 230000008901 benefit Effects 0.000 abstract description 6
- 239000007787 solid Substances 0.000 abstract description 5
- 238000003860 storage Methods 0.000 abstract description 5
- 238000003756 stirring Methods 0.000 description 32
- 230000001804 emulsifying effect Effects 0.000 description 14
- 238000010438 heat treatment Methods 0.000 description 11
- 239000013530 defoamer Substances 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 7
- 229920000642 polymer Polymers 0.000 description 7
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 6
- 230000018044 dehydration Effects 0.000 description 6
- 238000006297 dehydration reaction Methods 0.000 description 6
- 229910052710 silicon Inorganic materials 0.000 description 6
- 239000010703 silicon Substances 0.000 description 6
- 239000000243 solution Substances 0.000 description 6
- 238000010276 construction Methods 0.000 description 5
- 239000000203 mixture Substances 0.000 description 4
- 238000011056 performance test Methods 0.000 description 4
- 150000003839 salts Chemical class 0.000 description 4
- 239000002904 solvent Substances 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000006260 foam Substances 0.000 description 3
- 239000012875 nonionic emulsifier Substances 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 125000000129 anionic group Chemical group 0.000 description 2
- 239000002585 base Substances 0.000 description 2
- 125000002091 cationic group Chemical group 0.000 description 2
- 239000000084 colloidal system Substances 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000003960 organic solvent Substances 0.000 description 2
- 230000005476 size effect Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910018557 Si O Inorganic materials 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 229920003086 cellulose ether Polymers 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- YACLQRRMGMJLJV-UHFFFAOYSA-N chloroprene Chemical compound ClC(=C)C=C YACLQRRMGMJLJV-UHFFFAOYSA-N 0.000 description 1
- 238000010073 coating (rubber) Methods 0.000 description 1
- 239000004567 concrete Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 239000002612 dispersion medium Substances 0.000 description 1
- 239000003995 emulsifying agent Substances 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 239000008236 heating water Substances 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 238000011031 large-scale manufacturing process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000003607 modifier Substances 0.000 description 1
- 239000002086 nanomaterial Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 230000036314 physical performance Effects 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- LIVNPJMFVYWSIS-UHFFFAOYSA-N silicon monoxide Inorganic materials [Si-]#[O+] LIVNPJMFVYWSIS-UHFFFAOYSA-N 0.000 description 1
- 229920002545 silicone oil Polymers 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 150000005846 sugar alcohols Polymers 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D195/00—Coating compositions based on bituminous materials, e.g. asphalt, tar, pitch
- C09D195/005—Aqueous compositions, e.g. emulsions
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D111/00—Coating compositions based on homopolymers or copolymers of chloroprene
- C09D111/02—Latex
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/265—Calcium, strontium or barium carbonate
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Paints Or Removers (AREA)
Abstract
The invention discloses a water-emulsion rubber asphalt waterproof coating and a preparation method thereof, belonging to the technical field of waterproof coatings. The invention comprises the following components in parts by weight: 20-50 parts of petroleum asphalt, 20-50 parts of nonionic neoprene latex, 1-4 parts of nonionic surfactant, 10-30 parts of superfine calcium carbonate, 10-20 parts of water, 0.2-0.5 part of defoaming agent, 0.1-0.2 part of preservative, 0.1-0.5 part of thickening agent and 0.2-0.5 part of stabilizer. Compared with ionic neoprene latex modified asphalt coating, the water emulsion type waterproof coating prepared from the non-ionic neoprene latex has the advantages of better storage stability, higher solid content, better mechanical property, wide application range, economy and applicability, and is suitable for various base materials.
Description
Technical Field
The invention relates to the technical field of waterproof coatings, and particularly relates to a water-emulsion rubber asphalt waterproof coating and a preparation method thereof.
Background
The asphalt waterproof coating is a waterproof coating prepared by using asphalt as a base material and is divided into a solvent type asphalt waterproof coating and a water emulsion type asphalt waterproof coating. The solvent type asphalt waterproof coating adopts an organic solvent as a dispersion medium, has a strong smell, contains a large amount of harmful and volatile substances, and has potential safety hazards. The water-emulsion asphalt waterproof coating replaces a large amount of organic solvents in a solvent type asphalt waterproof coating with water, reduces the emission of toxic solvents, meets the requirements of green, low carbon and environmental protection, and has the advantages of simple operation, safe construction, lower cost, high bonding strength with a base layer and lower requirement on the base layer. However, the performance of the common water-emulsion asphalt waterproof coating can not fully meet the actual application requirements, and the common water-emulsion asphalt waterproof coating needs to be modified. Generally, a high molecular polymer is used as a modifier, so that the modified water-emulsion asphalt waterproof coating has higher low-temperature flexibility and heat resistance so as to meet the requirement of the performance of a waterproof material.
At present, most of modified asphalt rubber coatings with excellent physical properties are prepared by modifying chloroprene rubber, and chloroprene latex used in the coatings is usually ionic. The water-emulsion rubber modified asphalt waterproof coating prepared from the ionic neoprene latex has good physical and mechanical properties, but has poor material colloid stability, can be isolated when stored at the temperature of lower than 5 ℃, brings inconvenience to production and construction, and even causes material waste; and the prepared coating has poor tolerance to powder materials and is easy to generate emulsion breaking condition. In addition, the solid content of the aqueous latex rubber asphalt prepared from the ionic neoprene latex is not high, and the low solid content can cause the adverse effects of low equipment utilization rate, high transportation cost, large material consumption per unit area during construction, low construction efficiency and the like.
Disclosure of Invention
Aiming at the problems in the process, the invention aims to provide the water emulsion type rubber asphalt waterproof coating which has good stability, high solid content and wide application range.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
the water emulsion type rubber asphalt waterproof coating comprises the following components in parts by weight: 20-50 parts of No. 90 petroleum asphalt, 20-50 parts of nonionic neoprene latex, 1-4 parts of nonionic surfactant, 10-30 parts of superfine calcium carbonate, 10-20 parts of water, 0.2-0.5 part of defoaming agent, 0.1-0.2 part of preservative, 0.2-0.5 part of thickening agent and 0.2-0.5 part of stabilizer.
The water emulsion type rubber asphalt waterproof coating comprises the following components in parts by weight: 20-30 parts of No. 90 petroleum asphalt, 30-40 parts of nonionic neoprene latex, 20-30 parts of superfine calcium carbonate, 2-4 parts of nonionic surfactant, 10-15 parts of water, 0.1-0.3 part of defoaming agent, 0.1-0.2 part of preservative, 0.3-0.5 part of thickening agent and 0.2-0.3 part of stabilizer.
Within the limited range of the invention, the performance of the neoprene latex is improved compared with that of the coating, but the cost is increased, and in order to enable the coating to have good physical performance and better economic benefit, the preferable component mass ratio in the embodiment of the invention is as follows: 20 parts of No. 90 petroleum asphalt, 30 parts of nonionic neoprene latex, 15 parts of water, 4 parts of nonionic surfactant, 30 parts of ultrafine calcium carbonate, 0.1 part of defoaming agent, 0.2 part of preservative, 0.5 part of thickening agent and 0.2 part of stabilizing agent.
The superfine calcium carbonate refers to calcium carbonate with the average particle size of 0.02 mu m < d < 0.1 mu m of calcium carbonate powder, is a nano material, has special quantum size effect, small size effect and surface effect, and has obvious advantages in reinforcing property, transparency, dispersibility, thixotropy, leveling property and the like compared with the conventional powder material.
Because the high-performance water-emulsified rubber asphalt waterproof coating has higher requirement on the emulsifying property of asphalt and the coating has higher requirement on the crack resistance at low temperature, the asphalt used in the formula has not over high softening point and is easier to emulsify. In order to meet the requirements, the asphalt in the formula is No. 90, and the performance indexes are as follows: the softening point is more than 45 ℃, the penetration degree is 80-100 (25 ℃, 100g, 5s), and the ductility (25 ℃) is more than 45 cm.
The nonionic emulsifier forms a directional adsorption film on the asphalt particles and can also form a hydration layer to prevent the polymerization of the asphalt particles; in order to improve the storage stability of the waterproof coating, a nonionic emulsifier is selected in the formula for asphalt emulsification. The surfactant may be a polyoxyethylene type nonionic surfactant or a polyhydric alcohol type nonionic surfactant.
Because the Si-O bond is relatively stable, the silicone oil has high chemical stability, is difficult to generate chemical reaction with other substances, and is favorable for the storage stability of the coating. In addition, the silicone antifoaming agent not only can effectively break foam which has already been generated, but also can significantly suppress foam and prevent the generation of foam. Thus, the defoamer is a silicone defoamer.
In order to meet the requirement of environmental protection, the preservative cannot contain harmful substances such as formaldehyde and the like, so the preservative is a kasong preservative.
The cellulose ether thickening agent has poor biological stability and glossiness, while the acrylic thickening agent has poor water resistance and acid and alkali resistance, so the polyurethane thickening agent with good biological resistance, water resistance and paint film glossiness is selected in the formula.
The cellulose stabilizer not only has good thickening effect of the common thickener, but also has the characteristics of suspending, film forming, protective colloid providing and the like, and has the performance requirements provided by various auxiliary materials, so that the formula of the cellulose stabilizer selected from the stabilizer in the formula is simpler and more stable.
The invention also provides a preparation method of the water-emulsion rubber asphalt waterproof coating, which comprises the following steps:
(1) heating water to 70-80 ℃, and adding a nonionic surfactant, a defoaming agent and a stabilizer during stirring;
(2) heating asphalt, and performing an emulsification reaction on the prepared aqueous solution and the asphalt through an emulsifying machine to prepare an emulsified asphalt aqueous solution;
(3) adding the emulsified asphalt cooled to normal temperature into superfine calcium carbonate for uniform dispersion, adding neoprene latex, preservative and thickening agent, and uniformly mixing to obtain the finished product.
If the temperature of the asphalt is too low, the asphalt has high viscosity and difficult flowing, so that the emulsification is difficult; if the temperature of the asphalt is too high, on one hand, the asphalt is aged, and on the other hand, the outlet temperature of the emulsified asphalt is too high, so that the stability of the emulsifier and the quality of the emulsified asphalt are influenced. Therefore, in the step (2), the asphalt is heated to 120-130 ℃.
Compared with the prior art, the invention has the beneficial effects that:
compared with the existing ionic chloroprene rubber modified asphalt waterproof coating, the water emulsion type asphalt waterproof coating prepared by preparing the nonionic emulsified asphalt and modifying the nonionic chloroprene rubber latex has the advantages of more excellent mechanical property, higher solid content, more stable system and difficult demulsification.
Meanwhile, the superfine calcium carbonate component is added, so that the comprehensive performance of the asphalt coating is further enhanced compared with that of the conventional asphalt coating added with fillers such as heavy calcium carbonate, and particularly, the tensile strength, salt resistance and heat treatment performance are remarkably improved.
The water-emulsion rubber asphalt waterproof coating disclosed by the invention is few in component variety and reasonable in proportion preparation, ensures excellent performance of the waterproof coating, has good economic benefit, and is suitable for actual large-scale production.
Detailed Description
The invention is further described with reference to specific examples, which are not intended to limit the scope of the invention.
Example 1
A high-performance high-molecular rubber polymer modified water-emulsion waterproof coating comprises the following components in parts by weight: 20 parts of No. 90 petroleum asphalt, 20 parts of nonionic neoprene latex, 4 parts of nonionic surfactant, 30 parts of ultrafine calcium carbonate, 15 parts of water, 0.1 part of organic silicon defoamer, 0.2 part of Kathon preservative, 0.5 part of polyurethane thickener and 0.2 part of stabilizer cellulose.
Adding water and No. 90 asphalt into two stirring tanks respectively, adding a nonionic surfactant, a defoaming agent and a stabilizer into the water, and heating to 70 +/-3 ℃; meanwhile, the No. 90 asphalt is heated to 120 +/-3 ℃ for dehydration for 1 h. Emulsifying the prepared water solution and the dewatered asphalt by an emulsifying machine to prepare the nonionic emulsified asphalt.
Adding the emulsified asphalt cooled to normal temperature into a stirring tank, adding superfine calcium carbonate during stirring, dispersing uniformly at high speed, slowly adding neoprene latex, then stirring at low speed, adding a preservative and a polyurethane thickening agent, and stirring uniformly to obtain a finished product.
Example 2
A high-performance high-molecular rubber polymer modified water-emulsion waterproof coating comprises the following components in parts by weight: 20 parts of No. 90 petroleum asphalt, 25 parts of nonionic neoprene latex, 4 parts of nonionic surfactant, 30 parts of ultrafine calcium carbonate, 15 parts of water, 0.1 part of organic silicon defoamer, 0.2 part of Kathon preservative, 0.5 part of polyurethane thickener and 0.2 part of stabilizer cellulose.
Adding water and No. 90 asphalt into two stirring tanks respectively, adding a nonionic surfactant, a defoaming agent and a stabilizer into the water, and heating to 70 +/-3 ℃; meanwhile, the No. 90 asphalt is heated to 120 +/-3 ℃ for dehydration for 1 h. Emulsifying the prepared water solution and the dewatered asphalt by an emulsifying machine to prepare the nonionic emulsified asphalt.
Adding the emulsified asphalt cooled to normal temperature into a stirring tank, adding superfine calcium carbonate during stirring, dispersing uniformly at high speed, slowly adding neoprene latex, then stirring at low speed, adding a preservative and a polyurethane thickening agent, and stirring uniformly to obtain a finished product.
Example 3
A high-performance high-molecular rubber polymer modified water-emulsion waterproof coating comprises the following components in parts by weight: 20 parts of No. 90 petroleum asphalt, 30 parts of nonionic neoprene latex, 4 parts of nonionic surfactant, 30 parts of ultrafine calcium carbonate, 15 parts of water, 0.1 part of organic silicon defoamer, 0.2 part of Kathon preservative, 0.5 part of polyurethane thickener and 0.2 part of stabilizer cellulose.
Adding water and No. 90 asphalt into two stirring tanks respectively, adding a nonionic surfactant, a defoaming agent and a stabilizer into the water, and heating to 70 +/-3 ℃; meanwhile, the No. 90 asphalt is heated to 120 +/-3 ℃ for dehydration for 1 h. Emulsifying the prepared water solution and the dewatered asphalt by an emulsifying machine to prepare the nonionic emulsified asphalt.
Adding the emulsified asphalt cooled to normal temperature into a stirring tank, adding superfine calcium carbonate during stirring, dispersing uniformly at high speed, slowly adding neoprene latex, then stirring at low speed, adding a preservative and a polyurethane thickening agent, and stirring uniformly to obtain a finished product.
Comparative example 1
A high-performance high-molecular rubber polymer modified water-emulsion waterproof coating comprises the following components in parts by weight: 20 parts of No. 90 petroleum asphalt, 20 parts of nonionic neoprene latex, 4 parts of nonionic surfactant, 30 parts of 1250-mesh heavy calcium carbonate, 15 parts of water, 0.1 part of organic silicon defoamer, 0.2 part of Kathon preservative, 0.5 part of polyurethane thickener and 0.2 part of stabilizer cellulose.
Adding water and No. 90 asphalt into two stirring tanks respectively, adding a nonionic surfactant, a defoaming agent and a stabilizer into the water, and heating to 70 +/-3 ℃; meanwhile, the No. 90 asphalt is heated to 120 +/-3 ℃ for dehydration for 1 h. Emulsifying the prepared water solution and the dewatered asphalt by an emulsifying machine to prepare the nonionic emulsified asphalt.
Adding the emulsified asphalt cooled to normal temperature into a stirring tank, adding 1250-mesh heavy calcium carbonate into the stirring tank during stirring, dispersing the mixture uniformly at a high speed, slowly adding neoprene latex, adding the preservative and the polyurethane thickening agent into the mixture at a low speed, and stirring the mixture uniformly to obtain a finished product.
Comparative example 2
A high-performance high-molecular rubber polymer modified water-emulsion waterproof coating comprises the following components in parts by weight: 20 parts of No. 90 petroleum asphalt, 30 parts of anionic neoprene latex, 4 parts of nonionic surfactant, 30 parts of ultrafine calcium carbonate, 15 parts of water, 0.1 part of organic silicon defoamer, 0.2 part of Kathon preservative, 0.5 part of polyurethane thickener and 0.2 part of stabilizer cellulose.
Adding water and No. 90 asphalt into two stirring tanks respectively, adding a nonionic surfactant, a defoaming agent and a stabilizer into the water, and heating to 70 +/-3 ℃; meanwhile, the No. 90 asphalt is heated to 120 +/-3 ℃ for dehydration for 1 h. Emulsifying the prepared water solution and the dewatered asphalt by an emulsifying machine to prepare the nonionic emulsified asphalt.
Adding the emulsified asphalt cooled to normal temperature into a stirring tank, adding superfine calcium carbonate during stirring, dispersing uniformly at high speed, slowly adding neoprene latex, then stirring at low speed, adding a preservative and a polyurethane thickening agent, and stirring uniformly to obtain a finished product.
Comparative example 3
A high-performance high-molecular rubber polymer modified water-emulsion waterproof coating comprises the following components in parts by weight: 20 parts of No. 90 petroleum asphalt, 30 parts of cationic neoprene latex, 4 parts of nonionic surfactant, 30 parts of ultrafine calcium carbonate, 15 parts of water, 0.1 part of organic silicon defoamer, 0.2 part of Kathon preservative, 0.5 part of polyurethane thickener and 0.2 part of stabilizer cellulose.
Adding water and No. 90 asphalt into two stirring tanks respectively, adding a nonionic surfactant, a defoaming agent and a stabilizer into the water, and heating to 70 +/-3 ℃; meanwhile, the No. 90 asphalt is heated to 120 +/-3 ℃ for dehydration for 1 h. Emulsifying the prepared water solution and the dewatered asphalt by an emulsifying machine to prepare the nonionic emulsified asphalt.
Adding the emulsified asphalt cooled to normal temperature into a stirring tank, adding superfine calcium carbonate during stirring, dispersing uniformly at high speed, slowly adding neoprene latex, then stirring at low speed, adding a preservative and a polyurethane thickening agent, and stirring uniformly to obtain a finished product.
The test method comprises the following steps: standing the sample for 24 hours under the standard test condition, mechanically stirring uniformly, introducing the sample into a die frame for coating under the condition of not mixing air bubbles, coating 3-5 times (the interval time of each time is not more than 24 hours) to 1.5mm +/-0.2 mm, curing for 120 hours under the standard condition after the last coating is finished, demolding, curing for 48 hours in an electrothermal blowing dry box at the temperature of 40 +/-2 ℃, and curing for 4 hours under the standard condition for performance test.
Tensile bond Strength test was performed as described in JC/T975-2005, manner of coatings for roads and bridges, 6.12;
the bonding performance test is carried out according to 6.15 in JC/T975-2005 coating for roads and bridges;
the bonding strength of the coating and the cement concrete is tested according to the 16.6 th in JC/T975-2005 coatings for roads and bridges;
the low temperature flexibility test was performed as described in JC/T975-2005, coatings for roads and bridges, 6.11;
the performance test after salt treatment was carried out according to JC/T975-2005 Taoqiao mode coating, 6.13;
the performance test after heat treatment is carried out according to the 6.14 th in JC/T975-2005 Daoqiao mode paint;
corrosion resistance testing was performed according to JT/T535-2015 waterborne asphalt-based system coating for roads and bridges 6.11.
TABLE 1 comparison of mechanical properties of examples and comparative examples
As can be seen from the above table, the water-emulsion asphalt waterproof coating prepared by matching the nonionic emulsifier, the nonionic neoprene latex, the ultrafine calcium carbonate and other raw materials in examples 1 to 3 has significantly better storage stability under the condition of ensuring good tensile strength, elongation at break, low-temperature flexibility, salt resistance and heat treatment performance; the difference between the comparative example 1 and the example 1 is that the water-emulsion asphalt waterproof coating prepared by adopting 1250-mesh heavy calcium carbonate to replace superfine calcium carbonate in the formula has lower performance than that of a product prepared by superfine calcium carbonate, and particularly, the tensile strength, salt treatment and heat treatment performance are seriously reduced; comparative example 2, comparative example 3 and example 3 are the same formulation ratio, but the modified asphalt waterproof coating product prepared by modifying the anionic neoprene latex and the cationic neoprene latex has poorer mechanical property than example 3, particularly poorer storage stability, and can seriously influence the practical construction and use.
Claims (10)
1. The water-emulsion rubber asphalt waterproof coating is characterized by comprising the following components in parts by weight: 20-50 parts of No. 90 petroleum asphalt, 20-50 parts of nonionic neoprene latex, 10-30 parts of superfine calcium carbonate, 1-4 parts of nonionic surfactant, 10-20 parts of water, 0.1-0.5 part of defoaming agent, 0.1-0.2 part of preservative, 0.2-0.5 part of thickening agent and 0.2-0.5 part of stabilizer.
2. The water-emulsion rubber asphalt waterproof coating material as claimed in claim 1, which is characterized by comprising the following components in parts by weight: 20-30 parts of No. 90 petroleum asphalt, 30-40 parts of nonionic neoprene latex, 20-30 parts of superfine calcium carbonate, 2-4 parts of nonionic surfactant, 10-15 parts of water, 0.1-0.3 part of defoaming agent, 0.1-0.2 part of preservative, 0.3-0.5 part of thickening agent and 0.2-0.3 part of stabilizer.
3. The water-emulsion rubber asphalt waterproof coating material as claimed in claim 1, which is characterized by comprising the following components in parts by weight: 20 parts of No. 90 petroleum asphalt, 30 parts of nonionic neoprene latex, 15 parts of water, 4 parts of nonionic surfactant, 30 parts of superfine calcium carbonate, 0.1 part of defoaming agent, 0.2 part of preservative, 0.5 part of thickening agent and 0.2 part of stabilizing agent.
4. The water-emulsion type rubberized asphalt waterproofing coating according to claim 1, wherein the nonionic surfactant is a polyoxyethylene type nonionic surfactant or a polyol type nonionic surfactant.
5. The water-emulsion type rubber asphalt waterproof coating material as claimed in claim 1, wherein the defoaming agent is a silicone defoaming agent.
6. The water-emulsion type rubberized asphalt waterproofing paint according to claim 1, wherein the preservative is a Kathon preservative.
7. The water-emulsion type rubberized asphalt waterproofing paint according to claim 1, wherein the thickener is a polyurethane thickener.
8. The water-emulsion rubber asphalt waterproof coating material as claimed in claim 1, wherein the stabilizer is a cellulose stabilizer.
9. The method for preparing the water-emulsion type rubber asphalt waterproof coating material as claimed in any one of claims 1 to 8, characterized by comprising the steps of:
(1) uniformly mixing a nonionic surfactant, a defoaming agent, a stabilizer and water at 70-80 ℃;
(2) carrying out an emulsification reaction on the aqueous solution prepared in the step (1) and the heated asphalt to prepare a nonionic emulsified asphalt aqueous solution;
(3) adding the emulsified asphalt cooled to normal temperature into superfine calcium carbonate for uniform dispersion, adding neoprene latex, preservative and thickening agent, and uniformly mixing to obtain the finished product.
10. The method according to claim 9, wherein the pitch is heated to 120 to 130 ℃ in the step (2).
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