阅读说明：本技术 一种新型混凝土染色剂 (Novel concrete coloring agent ) 是由 丁海媛 霍红千 于 2021-07-20 设计创作，主要内容包括：本发明提供了一种新型混凝土染色剂,由按质量百分数计的以下组分制得：纳米金属络合染料2～10％、纳米二氧化硅5～20％、小分子树脂5～20％、溶剂45～88％、消泡剂1～3‰、分散剂1～3‰、光稳定剂1～3‰、紫外线吸收剂1～3‰、脱水剂1～5‰。本申请中溶剂、纳米二氧化硅、小分子树脂裹挟染料进行三阶梯渗透分布,解决了水分导致的染料迁移和光照产生的能量跃迁变色导致的色牢度下降的问题,实现混凝土的染色效果,并实现具有密封、硬化、耐水、耐磨、耐久性能的优质性能。(The invention provides a novel concrete coloring agent which is prepared from the following components in percentage by mass: 2-10% of nano metal complex dye, 5-20% of nano silicon dioxide, 5-20% of micromolecular resin, 45-88% of solvent, 1-3% of defoaming agent, 1-3% of dispersing agent, 1-3% of light stabilizer, 1-3% of ultraviolet absorbent and 1-5% of dehydrating agent. Solvent, nanometer silica, micro molecule resin wrap up in the dye and carry out the three-step infiltration and distribute in this application, have solved the problem that the energy transition that the dye migration that moisture leads to and illumination produced discolours and leads to the colour fastness to descend, realize the dyeing effect of concrete to the realization has sealed, sclerosis, water-fast, wear-resisting, the high-quality performance of durability.)

1. A novel concrete coloring agent is characterized in that: the adhesive is prepared from the following components in percentage by mass: 2-10% of nano metal complex dye, 5-20% of nano silicon dioxide, 5-20% of micromolecular resin, 45-88% of solvent, 1-3% of defoaming agent, 1-3% of dispersing agent, 1-3% of light stabilizer, 1-3% of ultraviolet absorbent and 1-5% of dehydrating agent.

2. A novel concrete stain as claimed in claim 1, characterised in that: the solvent is one or a combination of more of propylene glycol methyl ether acetate, propylene glycol methyl ether, diethyl carbonate and ethylene glycol butyl ether acetate.

3. A novel concrete stain as claimed in claim 2, characterised in that: the solvent comprises 20-30% of propylene glycol methyl ether, 20-30% of diethyl carbonate and 20-30% of ethylene glycol butyl ether acetate.

4. A novel concrete stain as claimed in claim 1, characterised in that: the nano metal complex dye adopts the following components: type 2 nanometal complex dyes.

5. A novel concrete stain as claimed in claim 1, characterised in that: the nano silicon dioxide is alcohol soluble nano silicon dioxide.

6. A novel concrete stain as claimed in claim 5, characterised in that: the nano silicon dioxide adopts silica sol with the particle size of 1-2 nm.

7. A novel concrete stain as claimed in claim 1, characterised in that: the micromolecule resin is one or a combination of a plurality of organic silicon resin, siloxane resin and resin prepolymer.

8. A method for synthesizing a novel concrete coloring agent according to claim 1, characterized in that: the method comprises the following steps:

1) adding two thirds of solvent, defoamer, dispersant, light stabilizer and ultraviolet absorbent to mix evenly;

2) adding a nano metal complex dye, and stirring for 30-60 minutes;

3) adding micromolecular resin and nano silicon dioxide into the mixed solution, and stirring the mixture uniformly;

4) adding the last third of the solvent;

5) adding a dehydrating agent, and stirring to be uniform;

6) and (5) filtering and discharging.

Technical Field

The invention relates to the technical field of coloring agents, in particular to a novel concrete coloring agent.

Background

The conventional coloring agent is prepared by dissolving or dispersing a dye in a solvent (oil solvent or water, etc.), and after the dye is permeated into concrete along with the solvent, the dye is firmly combined with metal ions in the concrete through a complex reaction. The visual effect of the oil-based coloring agent is obviously better than that of water-based coloring agents, and the change of the performance can be realized by adjusting the solvent, so that the color fastness is more durable. The water migration problem of the water-based coloring agent is relatively serious, the color fixing treatment is usually carried out for multiple times, the construction is complicated, and the color is easy to fade. The mainstream products in the market are mainly oily.

The concrete coloring agent is an oily penetrating type coloring material which has sealing hardening effect and coloring function on the concrete floor, can uniformly dye hardened concrete, and can realize elegant decorative appearance. The coloring agent is continuously constructed on the surface of the properly treated concrete, the coloring can be finished in one day, the color of the nano micro-particles can permeate into the concrete, the color is uniform, and the abrasion caused by traffic load can be avoided. Its dyeing principle is distinguished from acid coloration. The acidic coloring product needs to react with metal ions in the concrete under the acidic condition formed by inorganic acid or organic acid to form insoluble precipitate with color, as described in the scheme of patent CN201910965700.7, a concrete coloring agent and a preparation and construction method. The coloring effect is influenced by the dispersibility of the concrete composition, the formed color is uneven, the concrete is suitable for archaizing and antiquing floors, and the construction process is complex.

After the dye in the concrete coloring agent is combined with concrete metal ions, the color fastness is influenced by external conditions such as moisture, light, temperature, base material acid-base and the like, and the dye migrates and is excited by energy along with time, so that the ground color changes. The main causes of discoloration conventionally are water migration, light exposure, and temperature rise from light exposure. Solves the problems of dye migration caused by moisture and energy transition color change generated by illumination, and can fundamentally prolong the color fastness of the concrete coloring agent

Disclosure of Invention

The technical problem to be solved by the invention is to provide a novel concrete coloring agent, which can increase the ion bonding compactness, increase the color fastness, reduce the problems of water migration and light excitation, is durable in performance, is simple and complex in construction, and does not need excessive color fixing treatment of a water-based coloring agent.

Based on the problems, the technical scheme provided by the invention is a novel concrete coloring agent which is prepared from the following components, by mass, 2-10% of a nano metal complex dye, 5-20% of nano silicon dioxide, 5-20% of a small molecular resin, 45-88% of a solvent, 1-3% of a defoaming agent, 1-3% of a dispersing agent, 1-3% of a light stabilizer, 1-3% of an ultraviolet absorbent and 1-5% of a dehydrating agent.

Wherein, the solvent is one or a combination of more of propylene glycol methyl ether acetate, propylene glycol methyl ether, diethyl carbonate and ethylene glycol butyl ether acetate.

Preferably, the solvent is 20-30% of propylene glycol methyl ether, 20-30% of diethyl carbonate and 20-30% of ethylene glycol butyl ether acetate.

Wherein, the nano metal complex dye adopts the following formula: 2 type nanometer metal complex dye, the ratio of the number of central ions of the metal to the number of dye molecules is 1:2, the dye can be effectively dissolved in a solvent, is clear and transparent, has no precipitation or turbidity, is bright in color, can permeate into concrete along with the solvent by about 5-10 mm, and is combined with metal ions in the concrete through a complex reaction; the concrete is strong alkaline, and simultaneously the ground receives illumination, and the ground temperature can reach 60 ℃ in summer. Selecting 1: the 2 type nano metal complex dye has good color fastness to sunlight, heat resistance stable to more than 160 ℃, excellent water resistance and acid and alkali resistance fastness, and is suitable for dyeing concrete.

Wherein, the nano-silicon dioxide is alcohol soluble nano-silicon dioxide, the pH value is acidic, and the nano-silicon dioxide coexists with dye in a solvent without acid-base reaction. The silica sol with the particle size range of 1-2 nm is more favorable for infiltration and reaction in concrete, so that the dye is locked, and the dye can infiltrate into the concrete by 5-8 mm on the basis of the concrete subjected to compact treatment. The untreated concrete can penetrate more than 10 mm. The nano silicon dioxide and the concrete have a nano silicon curing reaction, a part of the nano silicon dioxide and calcium hydroxide in the concrete form new chemical sol, a few parts of the nano silicon dioxide and the calcium hydroxide in the concrete are condensed into water-insoluble silicon dioxide gel, the silicon dioxide gel and the original concrete are firmly combined by silicon oxygen bonds and block capillary pores of the concrete, the density of the concrete is improved, water molecules are reduced, the hardness of a reaction product is high, the hardness of the concrete is improved, and the sealing and curing effect of the concrete is realized. The dye can also continuously react with the reaction product to realize dyeing. After the compactness of the concrete is improved, the dye combined with the concrete is locked in the concrete, so that the dye migration caused by water inlet and outlet, illumination and temperature is reduced, and the dyeing fastness is improved.

Wherein the micromolecular resin is one or more of organic silicon resin, siloxane resin and resin prepolymer. The coating has the characteristics of organic and inorganic materials and good weather resistance; the resin has good permeability, wraps the dye, permeates into the concrete for 2-5 mm, and is firmly combined with the concrete through a silicon-oxygen bond to lock the dye; the resin is filled in an infiltration mode, a continuous film is not formed on the surface of concrete, and abrasion is avoided. Other macromolecular resins, such as epoxy resins and acrylic resins, have large molecules, are impermeable, have a film-forming surface, are easy to abrade, and have poor weather resistance.

The preparation process of the novel concrete coloring agent comprises the following steps:

1) adding two thirds of solvent, defoamer, dispersant, light stabilizer and ultraviolet absorbent to mix evenly;

2) adding a nano metal complex dye, and stirring for 30-60 minutes;

3) adding micromolecular resin and nano silicon dioxide into the mixed solution, and stirring the mixture uniformly;

4) adding the last third of the solvent;

5) adding a dehydrating agent, and stirring to be uniform;

6) and (5) filtering and discharging.

The invention has the advantages and beneficial effects that:

according to the application, the solvent, the nano silicon dioxide and the micromolecular resin wrapped dye are subjected to three-step permeation distribution, so that the dyeing effect of concrete is realized, concrete pores are blocked in a step-type manner through the nano silicon dioxide and the micromolecular resin, the dye is locked, migration is prevented, the dye is wrapped and sealed by the silicon dioxide and the resin, light rays are prevented from directly contacting the dye on the surface layer of the concrete, light energy is consumed, and light fading is delayed; the nano silicon dioxide reacts with the concrete and cooperates with the micromolecular resin to seal the ground, so that the hardness, water resistance and wear resistance of the concrete are improved.

The nano metal complex dye adopts the following components: the type 2 nano metal complex dye has good light fastness, heat resistance stable to more than 160 ℃, and excellent water resistance and acid and alkali resistance fastness; the nano-silica is alcohol-soluble nano-silica, the pH value of the alcohol-soluble nano-silica is acidic, the alcohol-soluble nano-silica and the dye coexist in a solvent, an acid-base reaction cannot occur, and the silica sol with the particle size range of 1-2 nm is adopted, so that the penetration and the reaction in concrete are facilitated, and the dye is locked; the micromolecule resin has the characteristics of organic and inorganic materials, has good weather resistance and good permeability, wraps the dye, permeates into the concrete by 2-5 mm, is firmly combined with the concrete through a silicon-oxygen bond, locks the dye, is filled in a permeating mode, cannot form a continuous film on the surface of the concrete, and cannot be abraded.

Through developing the concrete coloring agent, the dyeing bottom surface with sealing, hardening, water resistance, wear resistance and durability is finally realized, the construction is simplified, and excessive color fixing treatment of the water-based coloring agent is not needed.

Detailed Description

The following examples are provided to illustrate specific embodiments of the present invention.

Example 1 a novel concrete coloring agent is prepared from the following components in percentage by mass: 5% of nano metal complex dye, 10% of nano silicon dioxide, 10% of micromolecular resin, 30% of propylene glycol methyl ether, 30% of diethyl carbonate, 15% of ethylene glycol butyl ether acetate, 1% of defoaming agent, 2% of dispersing agent, 1% of light stabilizer, 1% of ultraviolet absorbent and 5% of dehydrating agent.

Example 2 a novel concrete coloring agent is prepared from the following components in percentage by mass: 2.5% of nano metal complex dye, 10% of nano silicon dioxide, 10% of micromolecular resin, 30% of propylene glycol methyl ether, 30% of diethyl carbonate, 17.5% of propylene glycol methyl ether acetate, 1 thousandth of defoaming agent, 2 thousandth of dispersing agent, 1 thousandth of light stabilizer, 1 thousandth of ultraviolet absorbent and 5 thousandth of dehydrating agent.

Example 3 a novel concrete coloring agent is prepared from the following components in percentage by mass: 2.5% of nano metal complex dye, 20% of nano silicon dioxide, 15% of micromolecular resin, 30% of propylene glycol methyl ether, 30% of diethyl carbonate, 17.5% of propylene glycol methyl ether acetate, 2% of defoaming agent, 2% of dispersing agent, 2% of light stabilizer, 3% of ultraviolet absorbent and 3% of dehydrating agent.

Example 4 a novel concrete coloring agent is prepared from the following components in percentage by mass: 10% of nano metal complex dye, 20% of nano silicon dioxide, 15% of micromolecular resin, 25% of propylene glycol methyl ether, 15% of diethyl carbonate, 15% of propylene glycol methyl ether acetate, 2% of defoaming agent, 2% of dispersing agent, 2% of light stabilizer, 3% of ultraviolet absorbent and 3% of dehydrating agent.

The processing steps for preparing the concrete coloring agent by relying on the components of the above examples are as follows: 1) adding two thirds of solvent, defoamer, dispersant, light stabilizer and ultraviolet absorbent to mix evenly;

2) adding the nano metal complex dye and stirring for 60 minutes;

3) adding micromolecular resin and nano silicon dioxide into the mixed solution, and stirring the mixture uniformly;

4) adding the last third of the solvent;

5) adding a dehydrating agent, and stirring to be uniform;

6) and (5) filtering and discharging.

The performance of the coloring agent in the embodiment is compared with that of a comparison product 1, a comparison product 2 and a comparison product 3, wherein the comparison product 1 is a market conventional solvent type coloring agent, the comparison product 2 is a solvent type coloring agent added with epoxy resin, the comparison product 3 is a market water-based coloring agent, and the performances including hardness, 24h surface water absorption/mm, wear resistance, wet-friction-resistant color fastness and the like are compared.

Judging the color fastness of the coloring agent on concrete, executing no corresponding standard, making a set of contrast detection methods by referring to a detection method of the color fastness of the dye on a fabric and the construction steps of the coloring agent in actual engineering, and evaluating the color fastness performance of the coloring agent by evaluating the wet friction resistance color fastness and the weather aging resistance color fastness. And evaluating the color fastness of the color card by adopting nine grades of six colors, wherein each increment of 0.5 is a grade from 1 to 5, the color change degree is visually observed, the color change grade is judged, the higher the grade is, the more serious the color change is, and the color change is completely faded to 5.

Color fastness to wet rubbing: an angle grinder is used to match with a 400# grinding and polishing pad, a concrete dyeing sample plate is ground with water for 10 minutes, and the rotating speed of the angle grinder is controlled at 800 revolutions per minute. And (5) drying. The above process is repeated for 20 times. And observing the color difference between the test sample plate and the standard sample plate, contrasting with a six-color nine-level color matching card, visually observing the color change degree, and judging the color change level.

Weather-resistant color fastness: according to the wetting cycle A cycle described in GB/T1865-2009 Artificial weathering and Artificial radiation Exposure for color paint and varnish, a sample plate is subjected to simulated solar irradiation and water spraying in an artificial weathering box for 168h, namely 7 days. And observing the color difference between the test sample plate and the standard sample plate, contrasting with a six-color nine-level color matching card, visually observing the color change degree, and judging the color change level.

If no test condition exists, the sample plate can be placed outdoors, the sunlight is directly irradiated and regularly sprayed with water, and the color change degree of the test sample plate is compared with that of the standard sample plate under the same comparison condition. The test period is not less than 1 month.

Concrete hardness: a Mohs hardness pen is used for carrying out drawing detection, from 1 to 10, each time 1 is increased, the grade is one, the higher the grade is, the higher the hardness is, and the grade 10 is the hardness of the diamond.

24h surface water uptake reduction/%: the procedure is described in JC/T2158-2021, osmotic liquid sclerosant.

Abrasion resistance ratio/%: the method refers to JC/T906-2002 Cement-based wear-resistant materials for concrete floors, and the higher the wear-resistance ratio value is, the better the wear resistance is.

Preparing a template: the staining agent was coated on a C30 concrete base plate ground to 150 mesh once, and ground to 500 mesh and stained again. Grinding to 1000 mesh. Wherein the contrast product 3-water-based coloring agent is used for sample preparation according to the instruction of use, and the process comprises two times of dyeing and two times of color fixation.

And when the color fastness items are tested, spraying the CFS-401 protective agent on the surfaces of all the detection sample plates, drying, polishing, naturally curing for 7 days, and then testing.

And testing the performance change of the dyed concrete, grinding the concrete to 1000 meshes without adding a protective agent, and naturally curing for 7 days to test.

The sample size was 8cm by 8 cm. Test panel 2, standard dye ratio panel 1. To ensure uniform and consistent dyeing, the sample plate needs to be cut to a specified size after the same concrete plate is dyed.

The results are shown in table 1:

TABLE 1 comparison of product Properties

As can be seen from tests, the concrete coloring agent prepared by the method is superior to the traditional concrete coloring agent in various aspects such as hardness, abrasion resistance, color fastness and the like.

Although the present invention has been described in detail with reference to the preferred embodiments, the present invention is not limited to the embodiments, and the present invention is not limited to the embodiments. All equivalent changes and modifications made within the scope of the present invention shall fall within the scope of the present invention.