Nano pigment water-based color paste, preparation method and application in decorative concrete

Abstract

The invention relates to a nano pigment water-based color paste, a preparation method and application of the nano pigment water-based color paste in decorative concrete. The nano pigment water-based color paste comprises the following components in parts by weight: 15-30 parts of pigment; 0.5 to 4 parts of a surfactant; 5-15 parts of a reinforcing agent; 0.05 to 1 part of a defoaming agent; 3-15 parts of a dispersant; 50 to 70 parts of water; the surfactant is a mixture of one or more of lignosulfonate, an acrylic acid sulfonate polymer and alkynol polyoxyethylene ether; the reinforcing agent is organic amine, and the pigment is one or more of iron oxide red, iron oxide yellow, phthalocyanine blue, iron black and carbon black. Therefore, the problems of high cost, non-uniform dispersion and powder floating on the surface when the pigment is directly used can be solved, and the segregation of concrete components cannot be caused; the strength of the concrete can be guaranteed, and the situation that the strength is greatly reduced due to air holes generated in the concrete is avoided.

Description

Technical Field

[0001] The invention belongs to the technical field of concrete and relates to a nano-pigment water-based color paste, and in particular to a nano-pigment water-based color paste, a preparation method and application in decorative concrete. Background Art

[0002] Commercial concrete, also known as ready-mixed concrete, refers to a pre-mixed, quality-qualified concrete mixture that is sold to construction units in the form of a commodity and transported to the construction site for pouring. It is mainly used to form the main structure of a building.

[0003] With the development of the construction industry and the improvement of people's living standards, the requirements for the decoration and use of scenes such as the ground and the exterior walls of buildings (mainly using non-commercial concrete) are gradually increasing. In order to create a more comfortable and humane working and living environment, or to avoid visual fatigue of drivers, the ground provides an opportunity for the application of colored concrete in the construction field. The coloring of existing colored concrete usually uses metal oxides directly added during the concrete premixing process. The concrete obtained in this way is not bright in color, has many bubbles, greatly reduces the compressive strength of the concrete, and is costly; when the colorant uses organic dyes, the weather resistance and sunlight resistance are poor, which easily causes the dye to migrate and float on the surface of the concrete, and also causes pores in the concrete, which greatly reduces the strength of the concrete after curing. Summary of the invention

[0004] The purpose of the present invention is to provide a nano pigment water-based color paste in order to overcome the deficiencies of the prior art.

[0005] To achieve the above object, the technical solution adopted by the present invention is: a nano pigment water-based color paste, which includes the following components in parts by weight:

[0006]

[0007] The surfactant is a mixture of one or more of lignin sulfonate, acrylic acid sulfonate polymer and acetylene alcohol polyoxyethylene ether; the enhancer is an organic amine, and the pigment is one or more of iron red, iron yellow, phthalocyanine blue, iron black and carbon black.

[0008] Optimally, the enhancer is a mixture of one or more selected from monoethanolamine, monoethanolamine diisopropanolamine, diethanolamine, diethanolamine monoisopropanolamine, diisopropanolamine, monoisopropanolamine, triisopropanolamine, triethanolamine, N,N-diethylformamide, N,N-dimethylformamide, N,N-dimethylacetamide and diethylenetriamine.

[0009] Optimally, the defoamer is a self-emulsifying silicone defoamer in water.

[0010] Optimally, the dispersant is a mixture of one or more selected from acrylic acid copolymers, polymaleic acid, polyethylene glycol, EO-PO block copolymers and EO-PO-EO triblock copolymers.

[0011] Optimally, the particle size of the pigment is 500-800 nm.

[0012] Furthermore, the sulfonation degree of the lignin sulfonate is 1.2-1.6 mmol / g, the number average molecular weight of the acrylic acid sulfonate polymer is 8000-30000 and the sulfonation degree is 1.2-1.6 mmol / g, and the number average molecular weight of the acetylene alcohol polyoxyethylene ether is 400-4000.

[0013] Another object of the present invention is to provide a method for preparing the above-mentioned nano pigment water-based color paste, which comprises the following steps:

[0014] (a) Dispersing and emulsifying: uniformly mixing the pigment, the surfactant, the enhancer, the defoamer, the dispersant and the water in a formulated amount to obtain a mixed material;

[0015] (b) Grinding: The mixed material is processed by a closed-cycle wet grinding method and then discharged; the process parameters of the wet grinding are controlled as follows: pressure 0.05-0.2 MPa, pneumatic pump feeding cycle 3-8 seconds and discharge temperature 40° C.-50° C.;

[0016] (c) Filtration: After the material is discharged, it is filtered using an online tubular filter under positive pressure to remove large particles, thereby obtaining the nano-pigment water-based color paste.

[0017] Optimally, in step (b), a Microtrac nanoparticle size analyzer is also used to detect the product endpoint.

[0018] Another object of the present invention is to provide an application of the above-mentioned nano pigment water-based color paste in decorative concrete, which comprises the following steps:

[0019] (a) mixing the nano pigment water-based color paste with concrete to obtain a decorative concrete slurry, wherein the concrete is selected from one of the specifications C15 to C100;

[0020] (b) forming the concrete slurry on the surface of commercial concrete or substrate, and generating single-sided colored decorative concrete after solidification and maintenance.

[0021] Optimally, in step (a), the amount of the nano-pigment water-based color paste added is 2-4% of the mass of the cementitious material in the concrete, and the cementitious material in the concrete is the sum of the mass of its cement, mineral powder and fly ash.

[0022] Due to the application of the above technical scheme, the present invention has the following advantages compared with the prior art: the nano pigment water-based color paste of the present invention and its application in decorative concrete can be fully mixed with concrete to form on the surface of concrete or substrate by using specific formula components, which can overcome the problems of high cost, uneven dispersion and surface powder when the pigment is used directly, and will not cause segregation of concrete components; and can ensure the strength of concrete, avoiding the formation of pores inside the concrete and causing a significant decrease in strength. DETAILED DESCRIPTION

[0023] The nano pigment water-based color paste of the present invention comprises the following components in parts by weight: 15 to 30 parts of pigment; 0.5 to 4 parts of surfactant; 5 to 15 parts of enhancer; 0.05 to 1 part of defoamer; 3 to 15 parts of dispersant; 50 to 70 parts of water; the surfactant is a mixture of one or more of lignin sulfonate, acrylic acid sulfonate polymer and acetylene alcohol polyoxyethylene ether; the enhancer is an organic amine, and the pigment is one or more of iron red, iron yellow, phthalocyanine blue, iron black and carbon black. By using specific formula components, it can be fully mixed with concrete to form on the surface of concrete or substrate, so that the problems of high cost, uneven dispersion and surface powder when the pigment is used directly can be overcome, and the segregation of concrete components will not be caused; and the strength of concrete can be guaranteed to avoid the formation of pores inside the concrete and the significant decrease in strength.

[0024] Specifically, the enhancer is preferably a mixture of one or more selected from monoethanolamine, monoethanolamine diisopropanolamine, diethanolamine, diethanolamine monoisopropanolamine, diisopropanolamine, monoisopropanolamine, triisopropanolamine, triethanolamine, N,N-diethylformamide, N,N-dimethylformamide, N,N-dimethylacetamide and diethylenetriamine. The defoamer is preferably a self-emulsifying silicone defoamer in water (such as SXP-106, HY-2040, PGA, etc.). The dispersant is preferably a mixture of one or more selected from acrylic copolymers, polymaleic acid, polyethylene glycol, EO-PO block copolymers and EO-PO-EO triblock copolymers. The preferred particle size of the pigment is 500 to 800 nm. Preferably, the sulfonation degree of the lignin sulfonate is 1.2 to 1.6 mmol / g, the number average molecular weight of the acrylic acid sulfonate polymer is 8000 to 30000 and the sulfonation degree is 1.2 to 1.6 mmol / g, and the number average molecular weight of the acetylene alcohol polyoxyethylene ether is 400 to 4000; surfactants with a sulfonation degree and number average molecular weight within this range make the nano-pigment water-based color paste have good dispersibility with concrete, thereby ensuring the quality of decorative concrete during subsequent use.

[0025] The preparation method of the nano pigment water-based color paste comprises the following steps: (a) dispersion and emulsification: mixing the pigment, the surfactant, the enhancer, the defoamer, the dispersant and the water in the formula to obtain a mixed material; (b) grinding: treating the mixed material by a closed-loop wet grinding method and then discharging the material; the process parameters of the wet grinding are controlled as follows: pressure 0.05-0.2MPa, pneumatic pump feeding cycle 3-8 seconds and discharging temperature 40°C-50°C; (c) filtering: after discharging the material, filtering is performed by an online tubular filter in a positive pressure mode to remove large particles, thereby obtaining the nano pigment water-based color paste. In step (b), a Microtrac nanoparticle size analyzer is also used to detect the product endpoint.

[0026] The application of the above nano pigment water-based color paste in decorative concrete comprises the following steps: (a) mixing the nano pigment water-based color paste with concrete to obtain decorative concrete paste, wherein the concrete is selected from one of the specifications C15 to C100; (b) forming the concrete paste on the surface of commercial concrete or substrate, and generating single-sided colored decorative concrete after solidification and curing. Optimally, in step (a), the amount of the nano pigment water-based color paste added is 2 to 4% of the mass of the cementitious material in the concrete, wherein the cementitious material in the concrete is the sum of the mass of cement, mineral powder and fly ash.

[0027] The preferred embodiments of the present invention are described in detail below:

[0028] Example 1

[0029] This embodiment provides a nano pigment water-based color paste, a preparation method and an application in decorative concrete, as follows:

[0030] Pigment (iron red, average particle size 500-600nm) 15 parts;

[0031] Surfactant (sodium lignin sulfonate, degree of sulfonation is 1.2 mmol / g) 4 parts;

[0032] Enhancer (monoethanolamine) 15 parts;

[0033] Defoaming agent (SXP-106) 1 part;

[0034] Dispersant (polymaleic acid, relative molecular weight 400-800) 15 parts;

[0035] 70 parts water;

[0036] The method for preparing the nano pigment water-based color paste comprises the following steps:

[0037] (a) Dispersing and emulsifying: uniformly mixing the pigment, the surfactant, the enhancer, the defoamer, the dispersant and the water in a formulated amount to obtain a mixed material;

[0038] (b) Grinding: The mixed material is processed by a closed-cycle wet grinding method and then discharged; the process parameters of the wet grinding are controlled as follows: pressure 0.05-0.2 MPa, pneumatic pump feeding cycle 3-8 seconds and discharge temperature 40° C.-50° C.; and a Microtrac nanoparticle size analyzer is used to detect the product endpoint;

[0039] (c) Filtration: After the material is discharged, it is filtered using an online tubular filter under positive pressure to remove large particles, thereby obtaining the nano-pigment water-based color paste.

[0040] The application of the nano pigment water-based color paste in decorative concrete comprises the following steps:

[0041] (a) mixing the nano pigment water-based color paste with concrete to obtain decorative concrete paste (the concrete can be one of C15 to C100. In this embodiment, the lowest grade C15 concrete is selected for testing); the amount of the nano pigment water-based color paste added is usually 2% of the mass of the cementitious material in the concrete; the cementitious material in the concrete is the sum of the mass of cement, mineral powder and fly ash;

[0042] (b) The concrete slurry is formed on the surface of commercial concrete or substrate, and a single-sided colored decorative concrete is generated after solidification and curing.

[0043] Example 2

[0044] This embodiment provides a nano pigment water-based color paste, a preparation method and an application in decorative concrete, which is basically the same as that in Embodiment 1, except that it includes the following parts by weight:

[0045] Pigment (iron red, average particle size 500-600nm) 30 parts;

[0046] Surfactant (sodium lignin sulfonate, degree of sulfonation is 1.2 mmol / g) 0.5 parts;

[0047] Enhancer (monoethanolamine) 5 parts;

[0048] Defoaming agent (SXP-106) 0.05 parts;

[0049] Dispersant (polymaleic acid, relative molecular weight 400-800) 3 parts;

[0050] 50 parts of water.

[0051] Example 3

[0052] This embodiment provides a nano pigment water-based color paste, a preparation method and an application in decorative concrete, which is basically the same as that in Embodiment 1, except that it includes the following parts by weight:

[0053] Pigment (iron red, average particle size 500-600nm) 25 parts;

[0054] Surfactant (sodium lignin sulfonate, degree of sulfonation is 1.2 mmol / g) 2 parts;

[0055] Enhancer (monoethanolamine) 10 parts;

[0056] Defoaming agent (SXP-106) 0.5 parts;

[0057] Dispersant (polymaleic acid, relative molecular weight 400-800) 5 parts;

[0058] 60 parts of water.

[0059] Example 4

[0060] This embodiment provides a nano-pigment water-based color paste, a preparation method and an application in decorative concrete, which is basically the same as that in Example 3, except that the surfactant used is an acrylic acid-acrylate-sulfonate terpolymer with a molecular weight of 8000 and a sulfonation degree of 1.2 mmol / g.

[0061] Example 5

[0062] This embodiment provides a nano-pigment water-based color paste, a preparation method and an application in decorative concrete, which is basically the same as that in Example 3, except that the surfactant used is an acrylic acid-acrylate-sulfonate terpolymer with a molecular weight of 30,000 and a sulfonation degree of 1.6 mmol / g.

[0063] Example 6

[0064] This embodiment provides a nano-pigment water-based color paste, a preparation method and an application in decorative concrete, which is basically the same as that in Example 3, except that the surfactant used is acetylene glycol polyoxyethylene ether, and its number average molecular weight is 3500-4000.

[0065] Example 7

[0066] This embodiment provides a nano-pigment water-based color paste, a preparation method and an application in decorative concrete, which is basically the same as that in Example 3, except that the amount of the nano-pigment water-based color paste added is usually 3% of the mass of the cementitious material in the concrete.

[0067] Example 8

[0068] This embodiment provides a nano-pigment water-based color paste, a preparation method and an application in decorative concrete, which is basically the same as that in Embodiment 3, except that the amount of the nano-pigment water-based color paste added is usually 4% of the mass of the cementitious material in the concrete.

[0069] Comparative Example 1

[0070] This example provides a nano-pigment water-based color paste, a preparation method and an application in decorative concrete, which is basically the same as that in Example 3, except that the reinforcing agent used is a chitosan modification.

[0071] Comparative Example 2

[0072] This example provides a nano-pigment water-based color paste, a preparation method and an application in decorative concrete, which is basically the same as that in Example 3, except that the reinforcing agent is excessive, 25 parts.

[0073] Comparative Example 3

[0074] This example provides a nano-pigment water-based color paste, a preparation method and an application in decorative concrete, which is basically the same as that in Example 3, except that: the dispersant is excessive, 20 parts.

[0075] The decorative concretes prepared in Examples 1-13 and Comparative Examples 1-5 were subjected to physical and chemical tests, and their properties are listed in Table 1.

[0076] Table 1 shows the application performance of the colored concrete slurry in Examples 1-13 and Comparative Examples 1-5.

[0077]

[0078] Note: The test method for concrete compressive strength adopts the test block method, refer to GB50010-2010; the tests of surface floating powder, concrete segregation and concrete surface pores are all conducted by visual inspection.

[0079] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with this technology to understand the contents of the present invention and implement them accordingly. They cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A nano pigment water-based color paste, characterized in that: It includes the following components in parts by weight: Pigment 15~30 parts; Surfactant 0.5~4 parts; Enhancer 5~15 parts; Defoaming agent 0.05~1 part; Dispersant 3~15 parts; 50~70 parts of water; The surfactant is a mixture of one or more of lignin sulfonate, acrylic acid sulfonate polymer and acetylene alcohol polyoxyethylene ether; the enhancer is an organic amine, and the pigment is one or more of iron red, iron yellow, phthalocyanine blue, iron black and carbon black.

2. The nano pigment water-based color paste according to claim 1, characterized in that: The enhancer is a mixture of one or more selected from monoethanolamine, monoethanolamine diisopropanolamine, diethanolamine, diethanolamine monoisopropanolamine, diisopropanolamine, monoisopropanolamine, triisopropanolamine, triethanolamine, N,N-diethylformamide, N,N-dimethylformamide, N,N-dimethylacetamide and diethylenetriamine.

3. The nano pigment water-based color paste according to claim 1, characterized in that: The defoamer is a self-emulsifying organosilicon defoamer in water.

4. The nano pigment water-based color paste according to claim 1, characterized in that: The dispersant is a mixture of one or more selected from acrylic acid copolymer, polymaleic acid, polyethylene glycol, EO-PO block copolymer and EO-PO-EO triblock copolymer.

5. The nano pigment water-based color paste according to claim 1, characterized in that: The particle size of the pigment is 500-800 nm.

6. The nano pigment water-based color paste according to claim 4, characterized in that: The sulfonation degree of the lignin sulfonate is 1.2-1.6 mmol / g, the number average molecular weight of the acrylic acid sulfonate polymer is 8000-30000 and the sulfonation degree is 1.2-1.6 mmol / g, and the number average molecular weight of the acetylene alcohol polyoxyethylene ether is 400-4000.

7. The method for preparing the nano pigment water-based color paste according to any one of claims 1 to 6, characterized in that: It includes the following steps: (a) Dispersing and emulsifying: uniformly mixing the pigment, the surfactant, the enhancer, the defoamer, the dispersant and the water in a formulated amount to obtain a mixed material; (b) Grinding: The mixed material is processed by a closed-cycle wet grinding method and then discharged; the process parameters of the wet grinding are controlled as follows: pressure 0.05-0.2 MPa, pneumatic pump feeding cycle 3-8 seconds and discharge temperature 40°C-50°C; (c) Filtration: After the material is discharged, it is filtered using an online tubular filter in a positive pressure manner to remove large particles, thereby obtaining the nano-pigment water-based color paste.

8. The method for preparing the nano pigment water-based color paste according to claim 7, characterized in that: In step (b), a Microtrac nanoparticle size analyzer is also used to detect the product endpoint.

9. Application of the nano pigment water-based color paste in any one of claims 1 to 6 in decorative concrete, characterized in that: It includes the following steps: (a) mixing the nano pigment water-based color paste with concrete to obtain a decorative concrete slurry, wherein the concrete is selected from one of the specifications C15 to C100; (b) forming the concrete slurry on the surface of commercial concrete or substrate, and generating single-sided colored decorative concrete after solidification and maintenance.

10. The use of the nano pigment water-based color paste in decorative concrete according to claim 9, characterized in that: In step (a), the amount of the nano-pigment water-based color paste added is 2-4% of the mass of the cementitious material in the concrete, and the cementitious material in the concrete is the sum of the mass of cement, mineral powder and fly ash.

Images