CN111218149A - Preparation method and application of ultraviolet radiation resistant calcium hydroxide composite particles - Google Patents
Preparation method and application of ultraviolet radiation resistant calcium hydroxide composite particles Download PDFInfo
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- CN111218149A CN111218149A CN202010216574.8A CN202010216574A CN111218149A CN 111218149 A CN111218149 A CN 111218149A CN 202010216574 A CN202010216574 A CN 202010216574A CN 111218149 A CN111218149 A CN 111218149A
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- 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
- C09D7/48—Stabilisers against degradation by oxygen, light or heat
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- 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
- C09D143/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and containing boron, silicon, phosphorus, selenium, tellurium, or a metal; Coating compositions based on derivatives of such polymers
- C09D143/04—Homopolymers or copolymers of monomers containing silicon
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- 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
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- 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
- C09D7/65—Additives macromolecular
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- 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
- C09D7/70—Additives characterised by shape, e.g. fibres, flakes or microspheres
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- 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
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2206—Oxides; Hydroxides of metals of calcium, strontium or barium
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- 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
- C08K3/32—Phosphorus-containing compounds
- C08K2003/321—Phosphates
- C08K2003/324—Alkali metal phosphate
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
Abstract
The invention relates to a preparation method and application of ultraviolet radiation resistant calcium hydroxide composite particles. Firstly, calcium lignosulphonate is used as a template, calcium carboxymethylcellulose is used as a dispersing agent and a stabilizing agent, and a calcium hydroxide composite particle with high dispersibility and an ultraviolet radiation resistant function is obtained based on the digestion reaction of calcium oxide powder; secondly, the calcium hydroxide composite particles are used as the ultraviolet radiation resistant functional filler and the coagulant to be applied to a water-based exterior wall coating system, and the ultraviolet radiation resistant exterior wall coating formula is optimized and established. The invention innovatively utilizes the ultraviolet radiation resistance characteristic of lignin calcium sulfonate of a woody biomass-based material and the electrokinetic characteristic of calcium carboxymethylcellulose, controllably synthesizes calcium hydroxide composite particles with high dispersibility and ultraviolet radiation resistance, realizes the functional application of the calcium hydroxide composite particles in ultraviolet radiation resistance water-based building exterior wall coatings, greatly widens the application range of calcium hydroxide and obviously improves the application added value of the calcium hydroxide.
Description
Technical Field
The invention belongs to the technical field of preparation and application of calcium hydroxide, and particularly relates to a preparation method and application of high-dispersity ultraviolet radiation resistant calcium hydroxide.
Background
Calcium hydroxide is produced by using calcium oxide as a production raw material through a digestion reaction, and has been widely applied to the fields of sewage treatment, building coatings, metallurgical industry and the like due to the special structure and properties of the calcium hydroxide. In particular, calcium hydroxide is used as a white filler, is widely applied to various building coating systems and mainly plays a role of a skeleton. With the rapid development of social economy and the continuous improvement of environmental protection consciousness of people, the environmental protection water-based building coating becomes a mainstream product, and the application potential of the calcium hydroxide in the water-based building coating is more and more concerned due to the hydrophily and low cost of the calcium hydroxide.
However, in the development process of high-performance water-based architectural coatings, the water phase dispersibility and special functionality of the pigments and fillers become key factors. Calcium hydroxide, as a common filler, is obtained by the digestion reaction of quicklime and water, is easy to agglomerate and is not beneficial to improving the comprehensive performance of the architectural coating. Therefore, the improvement of the water phase dispersibility and stability of the calcium hydroxide is of great significance to the application of the calcium hydroxide in the water-based building coating. On the other hand, if the preparation process is optimized by adding corresponding auxiliary agents in the preparation process, calcium hydroxide particles can be controllably synthesized, the particle size can be controlled, and special functionality is given to the calcium hydroxide, so that the application path of the calcium hydroxide is greatly widened, and the application additional value of the calcium hydroxide is remarkably improved.
Disclosure of Invention
The invention aims to provide a preparation method and application of ultraviolet radiation resistant calcium hydroxide composite particles, and the purpose of the invention is realized by the following technical scheme:
a preparation method of ultraviolet radiation resistant calcium hydroxide composite particles uses calcium lignosulfonate as a template, carboxymethyl cellulose calcium as a dispersing agent and a stabilizing agent, and obtains the high-dispersity calcium hydroxide composite particles with the ultraviolet radiation resistant function based on the digestion reaction of calcium oxide. The method comprises the following steps:
respectively dissolving calcium lignosulfonate and carboxymethyl cellulose calcium in deionized water, mixing, and adjusting the pH value of the system to 11.
Gradually adding calcium oxide powder into the mixed solution under the ultrasonic stirring state, and adjusting the pH value of the system to 12;
and standing, filtering, and vacuum drying to obtain white particles, namely the calcium hydroxide composite particles.
In the process, by weight, 70-80 parts of calcium oxide powder, 15-25 parts of calcium lignosulfonate powder, 2-5 parts of carboxymethyl cellulose calcium powder and 500 parts of deionized water.
The application of the anti-ultraviolet radiation calcium hydroxide composite particles is to apply the calcium hydroxide composite particles as an anti-ultraviolet radiation functional filler and a coagulant in an exterior wall coating, wherein the coating comprises the following main components:
by weight, 50-60 parts of silicon dioxide, 20-30 parts of diatomite and 20-30 parts of calcium hydroxide composite particles; based on the total weight of the filler, the filler is added with 20-30% of silicone-acrylic emulsion, 2-3% of sodium hexametaphosphate, 0.5-1.0% of polyether modified organic silicon defoamer and 1.0-2.0% of quaternary ammonium salt modified chitosan.
Further, the calcium lignosulfonate is refined and processed by sulfite hardwood pulp waste liquid through processes of acidification, sulfonation, modification and the like, contains a large number of oxygen-containing functional groups, and has the relative molecular mass of 6800.
Further, the components are dispersed in water in the order of sodium hexametaphosphate, silicon dioxide, diatom, calcium hydroxide composite particles, quaternary ammonium salt modified chitosan, polyether modified organic silicon defoamer and silicone-acrylate emulsion, the shear rate is 3000 r/min, the time interval of adding the components is 6 minutes, and the solid content of the coating system is controlled at 62%.
The invention has the beneficial effects that:
the calcium hydroxide product raw material in the invention is quicklime calcium oxide, and has wide source, low price and high economic benefit. According to the invention, the ultraviolet radiation resistance of the lignin calcium sulfonate of the woody biomass-based material is innovatively utilized from the aspect of template effect while the particle size of calcium hydroxide is regulated, and the water phase dispersion performance of the product is improved by innovatively utilizing the carboxymethyl cellulose calcium of the woody biomass material as a dispersing agent and a stabilizing agent from the aspect of dispersion stability, so that the calcium hydroxide product of the public is upgraded into a high-performance functional filler product.
On the other hand, the invention takes the developed high-dispersity functional calcium hydroxide product as the filler, optimizes and constructs the formula of the ultraviolet radiation resistant water-based building exterior wall coating and the preparation process thereof, and realizes the high-valued functional application of the calcium hydroxide product in the high-performance building exterior wall coating. The invention has the advantages of clear application target, great market potential and obvious environmental and social benefits.
Detailed Description
The present invention will be further described with reference to examples.
Example 1
Preparing ultraviolet radiation resistant calcium hydroxide composite particles:
firstly, respectively dissolving calcium lignosulfonate and carboxymethylcellulose calcium in deionized water, then mixing, and adjusting the pH value of a system to 11; and then, gradually adding calcium oxide powder into the mixed solution under the ultrasonic stirring state, adjusting the pH value of the system to 12, standing, filtering, and drying in vacuum to obtain white particles. The calcium lignosulfonate comprises, by weight, 75 parts of calcium oxide powder, 20 parts of calcium lignosulfonate powder, 5 parts of carboxymethyl cellulose calcium powder and 400 parts of deionized water.
The application of the ultraviolet radiation resistant calcium hydroxide composite particles comprises the following steps:
the calcium hydroxide composite particles are used as the ultraviolet radiation resistant functional filler and the coagulant to be applied to an exterior wall coating system. Sequentially adding sodium hexametaphosphate, silicon dioxide, diatom, calcium hydroxide composite particles, quaternary ammonium salt modified chitosan, polyether modified organic silicon defoamer and silicone acrylic emulsion into deionized water, wherein the shear rate is 3000 r/min, the adding time interval of each component is 6 minutes, and the solid content of the coating system is controlled at 62%. By weight, 50 parts of silicon dioxide, 25 parts of diatomite and 25 parts of calcium hydroxide composite particles; based on the total weight of the filler, the filler is added with 25% M of silicone-acrylic emulsion, 3% M of sodium hexametaphosphate, 1.0% M of polyether modified organic silicon defoamer and 2.0% M of quaternary ammonium salt modified chitosan.
Analyzing the anti-ultraviolet radiation effect of the coating:
and (3) uniformly coating the prepared exterior wall coating on a quartz plate, and testing the ultraviolet (350 nm) absorbance value of the coating after the exterior wall coating is naturally dried. Under the same addition and the same ultraviolet aging conditions, the ultraviolet (350 nm) absorbance value of the exterior wall coating added with 25 parts of the conventional calcium hydroxide is 0.4, and the ultraviolet (350 nm) absorbance value of the exterior wall coating added with 25 parts of the calcium hydroxide composite particles reaches 1.9.
Example 2
Preparing ultraviolet radiation resistant calcium hydroxide composite particles:
firstly, respectively dissolving calcium lignosulfonate and carboxymethylcellulose calcium in deionized water, then mixing, and adjusting the pH value of a system to 11; and then, gradually adding calcium oxide powder into the mixed solution under the ultrasonic stirring state, adjusting the pH value of the system to 12, standing, filtering, and drying in vacuum to obtain white particles. 74 parts of calcium oxide powder, 22 parts of calcium lignosulfonate powder, 4 parts of carboxymethyl cellulose calcium powder and 300 parts of deionized water.
The application of the ultraviolet radiation resistant calcium hydroxide composite particles comprises the following steps:
the calcium hydroxide composite particles are used as the ultraviolet radiation resistant functional filler and the coagulant to be applied to an exterior wall coating system. Sequentially adding sodium hexametaphosphate, silicon dioxide, diatom, calcium hydroxide composite particles, quaternary ammonium salt modified chitosan, polyether modified organic silicon defoamer and silicone acrylic emulsion into deionized water, wherein the shear rate is 3000 r/min, the adding time interval of each component is 6 minutes, and the solid content of the coating system is controlled at 62%. By weight fraction, 60 parts of silicon dioxide, 20 parts of diatomite and 20 parts of calcium hydroxide composite particles; based on the total weight of the filler, the filler is added with 20 percent of silicone-acrylic emulsion M, 2 percent of sodium hexametaphosphate M, 0.5 percent of polyether modified organic silicon defoamer M and 1.0 percent of quaternary ammonium salt modified chitosan M.
Analyzing the anti-ultraviolet radiation effect of the coating:
and (3) uniformly applying the prepared exterior wall coating on a quartz plate, and testing the ultraviolet (350 nm) absorbance value of the coating after the exterior wall coating is naturally dried. Under the same addition amount and the same ultraviolet aging condition, the ultraviolet (350 nm) absorbance value of the exterior wall coating added with 20 parts of the conventional calcium hydroxide is 0.4, and the ultraviolet (350 nm) absorbance value of the exterior wall coating added with 20 parts of the calcium hydroxide composite particles reaches 1.6.
Example 3
Preparing ultraviolet radiation resistant calcium hydroxide composite particles:
firstly, respectively dissolving calcium lignosulfonate and carboxymethylcellulose calcium in deionized water, then mixing, and adjusting the pH value of a system to 11; and then, gradually adding calcium oxide powder into the mixed solution under the ultrasonic stirring state, adjusting the pH value of the system to 12, standing, filtering, and drying in vacuum to obtain white particles. 78 parts of calcium oxide powder, 18 parts of calcium lignosulfonate powder, 4 parts of carboxymethyl cellulose calcium powder and 500 parts of deionized water.
The application of the ultraviolet radiation resistant calcium hydroxide composite particles comprises the following steps:
the calcium hydroxide composite particles are used as the ultraviolet radiation resistant functional filler and the coagulant to be applied to an exterior wall coating system. Sequentially adding sodium hexametaphosphate, silicon dioxide, diatom, calcium hydroxide composite particles, quaternary ammonium salt modified chitosan, polyether modified organic silicon defoamer and silicone acrylic emulsion into deionized water, wherein the shear rate is 3000 r/min, the adding time interval of each component is 6 minutes, and the solid content of the coating system is controlled at 62%. 54 parts of silicon dioxide, 22 parts of diatomite and 24 parts of calcium hydroxide composite particles in parts by weight; based on the total weight of the filler, the filler is added with 30 percent of silicone-acrylate emulsion M, 2.5 percent of sodium hexametaphosphate M, 0.8 percent of polyether modified organic silicon defoamer M and 1.5 percent of quaternary ammonium salt modified chitosan M.
Analyzing the anti-ultraviolet radiation effect of the coating:
and (3) uniformly applying the prepared exterior wall coating on a quartz plate, and testing the ultraviolet (350 nm) absorbance value of the coating after the exterior wall coating is naturally dried. Under the same addition and the same ultraviolet aging conditions, the ultraviolet (350 nm) absorbance value of the exterior wall coating added with 24 parts of the conventional calcium hydroxide is 0.4, and the ultraviolet (350 nm) absorbance value of the exterior wall coating added with 24 parts of the calcium hydroxide composite particles reaches 1.8.
In conclusion, the invention enhances the digestion reaction process based on the template effect, improves the dispersibility of the calcium hydroxide and endows the calcium hydroxide with functionality (namely ultraviolet radiation resistance). The biomass material is used as an environment-friendly auxiliary agent to be innovatively applied to the synthesis process of calcium hydroxide. The invention innovatively utilizes the ultraviolet radiation resistance characteristic of the biomass-based material calcium lignosulfonate and the electrokinetic characteristic of the carboxymethyl cellulose calcium, controllably synthesizes the calcium hydroxide composite particles with high dispersibility and ultraviolet radiation resistance, realizes the functional application of the calcium hydroxide composite particles in the ultraviolet radiation exterior wall coating, greatly widens the application range of the calcium hydroxide and obviously improves the application added value of the calcium hydroxide. Therefore, the invention provides a new process and a new method for the controllable synthesis of high-performance functional calcium hydroxide, and contributes a new idea and a new path for high-valued application of the calcium hydroxide.
Claims (4)
1. A preparation method of ultraviolet radiation resistant calcium hydroxide composite particles is characterized by comprising the following steps:
the calcium lignosulphonate is used as a template, the carboxymethyl cellulose calcium is used as a dispersing agent and a stabilizing agent, and the calcium hydroxide composite particles with high dispersibility and ultraviolet radiation resistance are obtained based on the digestion reaction of calcium oxide, and specifically comprise the following components:
respectively dissolving calcium lignosulfonate and carboxymethyl cellulose calcium in deionized water; then mixing, and adjusting the pH value of the system to 11;
gradually adding calcium oxide powder into the mixed solution under the ultrasonic stirring state, and adjusting the pH value of the system to 12;
standing, filtering, and vacuum drying to obtain white particles, i.e. calcium hydroxide composite particles;
in the process, by weight, 70-80 parts of calcium oxide powder, 15-25 parts of calcium lignosulfonate powder, 2-5 parts of carboxymethyl cellulose calcium powder and 500 parts of deionized water.
2. The method for preparing ultraviolet radiation resistant calcium hydroxide composite particles according to claim 1, wherein the method comprises the following steps:
the calcium lignosulphonate is prepared by carrying out acidification, sulfonation and modification processes on sulfite hardwood pulp waste liquid, contains a large number of oxygen-containing functional groups and has the relative molecular mass of 6800.
3. The application of the ultraviolet radiation resistant calcium hydroxide composite particles in the exterior wall coating is characterized in that:
the calcium hydroxide composite particles are used as an ultraviolet radiation resistant functional filler and a coagulant in an exterior wall coating, and the coating comprises the following main components:
by weight, 50-60 parts of silicon dioxide, 20-30 parts of diatomite and 20-30 parts of calcium hydroxide composite particles;
based on the total weight of the filler, the filler is added with 20-30% of silicone-acrylic emulsion, 2-3% of sodium hexametaphosphate, 0.5-1.0% of polyether modified organic silicon defoamer and 1.0-2.0% of quaternary ammonium salt modified chitosan.
4. Use according to claim 3, characterized in that:
the components are dispersed in water in the order of sodium hexametaphosphate, silicon dioxide, diatomite, calcium hydroxide composite particles, quaternary ammonium salt modified chitosan, polyether modified organic silicon defoamer and silicone-acrylate emulsion, the shearing rate is 3000 r/min, the time interval of adding the components is 6 min, and the solid content of the coating system is controlled at 62%.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4786485A (en) * | 1986-11-12 | 1988-11-22 | The United States Of America As Represented By The United States Environmental Protection Agency | Lignosulfonate-modified calcium hydroxide for SO2 control during furnace injection |
| CN105968852A (en) * | 2016-05-25 | 2016-09-28 | 华南理工大学 | Anti-ultraviolet radiation lignin-based zinc oxide composite particles and preparation method and application thereof |
| CN109385132A (en) * | 2017-08-02 | 2019-02-26 | 王再青 | A kind of exterior wall resilient flexible anti-crack mastic powder and its preparation process |
-
2020
- 2020-03-25 CN CN202010216574.8A patent/CN111218149A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4786485A (en) * | 1986-11-12 | 1988-11-22 | The United States Of America As Represented By The United States Environmental Protection Agency | Lignosulfonate-modified calcium hydroxide for SO2 control during furnace injection |
| CN105968852A (en) * | 2016-05-25 | 2016-09-28 | 华南理工大学 | Anti-ultraviolet radiation lignin-based zinc oxide composite particles and preparation method and application thereof |
| CN109385132A (en) * | 2017-08-02 | 2019-02-26 | 王再青 | A kind of exterior wall resilient flexible anti-crack mastic powder and its preparation process |
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