CN111690276A - Silicate inorganic water-based paint and preparation method thereof - Google Patents
Silicate inorganic water-based paint and preparation method thereof Download PDFInfo
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- CN111690276A CN111690276A CN202010704292.2A CN202010704292A CN111690276A CN 111690276 A CN111690276 A CN 111690276A CN 202010704292 A CN202010704292 A CN 202010704292A CN 111690276 A CN111690276 A CN 111690276A
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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
- C09D1/00—Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances
- C09D1/02—Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances alkali metal silicates
- C09D1/04—Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances alkali metal silicates with organic additives
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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
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/14—Paints containing biocides, e.g. fungicides, insecticides or pesticides
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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
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/18—Fireproof paints including high temperature resistant paints
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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
Abstract
The invention discloses a silicate inorganic water-based paint and a preparation method thereof. The water-based paint comprises the following components: 30-40 wt% of potassium silicate, 10-20 wt% of water, 30-40 wt% of filler, 10-15 wt% of titanium dioxide, 0.4-0.5 wt% of cellulose, 0-1.0 wt% of dispersing agent, 0-1.0 wt% of wetting agent and 0-1.0 wt% of defoaming agent, wherein the modulus of the potassium silicate is 3.5-4.0. The water paint has extremely low organic content, but still has undetected VOC, fire-proof grade A1 and AQ1, and has very good film forming property, adhesiveness, water resistance, high temperature resistance, scrubbing resistance, contrast ratio, mildew resistance and the like. In addition, the preparation method of the silicate inorganic water-based paint has simple and rapid operation steps, can be used for large-scale preparation, and is beneficial to industrial production.
Description
Technical Field
The invention relates to the field of coatings, and particularly relates to a silicate inorganic water-based coating and a preparation method thereof.
Background
The paint for inner wall is emulsion paint painted to inner wall and has emulsion as main adhesive matter, organic assistant, pigment and stuffing, and the paint is painted to wall and dried naturally to reach the aim of decorating and protecting wall. However, as the living standard of people is increasingly improved, the requirements of comfort, environmental protection and safety of people on living environment decoration are increasingly high, especially the fireproof requirement of high-rise buildings and the limit requirement of VOC of children rooms, so that the existing emulsion type interior wall coating is embarrassed, mainly because a small amount of monomers are easily remained in the emulsion during synthesis, the VOC content can be detected even after purification technology treatment, and the emulsion is extremely easy to burn as an organic matter and can generate a large amount of toxic and harmful black smoke, so the existing emulsion type interior wall coating is difficult to achieve the performance indexes that the VOC is not detected and the burning grade is A.
Therefore, inorganic coating materials appear in the market at present, the technology of compounding silicate and acrylic emulsion is mainly adopted to achieve the characteristics of environmental protection, fire prevention, moisture and mildew prevention, good stain resistance, long service life and the like, but the type and the content of the acrylic emulsion can greatly influence the performance of the water-based inorganic coating material, for example, the content of the acrylic emulsion can influence the VOC content, the fire-proof grade, the mildew-proof property and the like, for example, the type of the acrylic emulsion can influence the product storage stability, the VOC content, the product smell and other properties, so that the content of the odorless acrylic emulsion in the best inner wall water-based inorganic coating material formula at present is 8-10%, the content of the high molecular organic matter is 5-10%, and the performance indexes of the VOC undetected and the fire-proof grade A can be achieved. However, although the coating can meet the A-grade fireproof requirement, a small amount of macromolecular organic matters contained in a paint film of the coating can be combusted when high-temperature flame occurs, a small amount of toxic and harmful dense smoke is emitted, the surface of the paint film can also be grey black, and the coating is still a small potential safety hazard when indoor fire occurs.
Therefore, there is still a need in the art to develop a water-based coating having very excellent properties in terms of VOC, fire-retardant rating, smoke toxicity, high temperature resistance, stability, scrub resistance, etc.
Disclosure of Invention
[ problem ] to
Aiming at the defects in the prior art, the invention aims to provide a silicate inorganic water-based paint, which completely eliminates the component of acrylic emulsion in the formula, selects potassium silicate with a specific modulus and is matched with other components with specific types and proportions, so that the prepared inorganic water-based paint has extremely low organic content, undetected VOC, fire-proof grade A1 and smoke toxicity grade AQ1, and has extremely excellent performances of film forming property, adhesion, water resistance, high temperature resistance, scrubbing resistance, contrast ratio, mildew resistance and the like.
The invention also aims to provide a preparation method of the silicate inorganic water-based paint, which has simple and rapid steps, can be prepared in a large scale and is beneficial to industrial production.
[ solution ]
In order to achieve the above object, according to one embodiment of the present invention, there is provided a silicate inorganic water-based paint comprising the following components:
wherein the modulus of the potassium silicate is 3.5-4.0.
In the invention, the water-based paint does not contain any organic solvent and acrylic emulsion components, the main components are inorganic substances, only contains a very small amount of organic auxiliary agents (less than 3.5 weight percent), and the organic auxiliary agents are adsorbed and fixed in inorganic components with a large content, so that the VOC can be reduced to 0, the water-based paint can resist the high temperature of 1200 ℃, the paint film can not burn at all when being baked by open fire, no toxic or harmful smoke can be generated, and the paint film only presents grey color and can not turn black even if being baked at the high temperature for a long time. In addition, even if the acrylic emulsion is not contained, the water-based paint of the invention has extremely good performances such as film forming property, adhesion, water resistance, high temperature resistance, scrub resistance, contrast ratio, mildew resistance and the like. Particularly, although the amount of the titanium dioxide is not high, the excellent contrast ratio is still obtained by matching the components.
The modulus of the potassium silicate is limited to be 3.5-4.0, and in the range, the water-based paint can react with calcium hydroxide, sand and the like in a wall substrate to generate a very firm chemical bonding effect and be fused into a whole, so that the adhesion is optimal; and the water-based paint can also absorb carbon dioxide in the air and react with the carbon dioxide, so that a porous and extremely firm high-air-permeability matte inorganic coating is formed. It can be seen that the present invention maximizes the reactivity of the aqueous coating while maintaining the balance of storage stability and the degree of wall reaction of the aqueous coating. When the modulus of the potassium silicate is less than 3.5, the reactivity of the water-based paint is increased, but the stability is greatly reduced; when the modulus of the potassium silicate is more than 4.0, the stability of the aqueous coating material is enhanced, but the reactivity is remarkably decreased. Further, the modulus of the potassium silicate may preferably be 3.7 to 3.9.
In addition, the water-based paint of the invention adopts potassium silicate rather than sodium silicate as a main binding substance, and when sodium silicate is replaced, the water resistance of the water-based paint after being applied to form a film is greatly reduced. Also, when the content of potassium silicate is more than 40% by weight, the stability of the water-based paint may be decreased and the contrast ratio may be decreased; when the content of potassium silicate is less than 30 wt%, the degree of reaction between potassium silicate and the wall is reduced, and the number of times of scrubbing and adhesion after film formation are remarkably reduced.
Further, the silicate inorganic water-based paint preferably contains the following components:
further, the silicate inorganic water-based paint more preferably contains the following components:
within the above range, the water-based paint of the present invention can have better film forming property, adhesion, water resistance, high temperature resistance, scrub resistance, contrast ratio, mildew resistance and the like.
The filler can comprise kaolin and wollastonite, and the mass ratio of the kaolin to the wollastonite can be 1 (1.05-1.3), and is preferably 1: 1.1.
The dispersant may be any one selected from SN-5040 (available from Noppolacaceae), CROSFECT-3500 (available from Shanghai Bingzhen Co., Ltd.), CROSFECT-3600 (available from Shanghai Bingzhen Co., Ltd.), and WJ-60 (available from Foshan Lotus leaf chemical industry).
The wetting agent can be any one selected from BL9 (from Shanghai Huahan), CROSFECT-202 (from Shanghai Xin Xian auxiliary agent) and WJ-03 (from Foshan Lotus leaf chemical industry).
The defoaming agent can be any one selected from AF-34 (purchased from Shanghai Australian chemical industry), F-111 (purchased from Zhongya auxiliary agent) and WJ-36 (purchased from Foshan lotus leaf chemical industry).
According to another embodiment of the present invention, there is provided a method for preparing the above silicate inorganic water-based paint, comprising the steps of:
(1) adding a dispersing agent, a wetting agent and 1/3-2/3 dosage of a defoaming agent into water in sequence at a stirring speed of 500-800 rpm,
(2) adding titanium dioxide, filler and cellulose into the obtained product in the step (1) at a stirring speed of 500-800 rpm, stirring for 25-35 minutes at a stirring speed of 1200-1500 rpm,
(3) slowly adding potassium silicate and the balance of defoaming agent into the product obtained in the step (2), and stirring for 4-6 minutes at a stirring speed of 800-1000 rpm.
In the invention, different components are added in batches, and the mixture is stirred for a specific time at a specific speed, so that the silicate inorganic water-based paint which is homogeneous and stable and has excellent performance can be prepared.
Further, the step (1) may preferably be: and sequentially adding a dispersing agent, a wetting agent and 1/2 dosage of a defoaming agent into water at a stirring speed of 600-700 rpm.
Further, the step (2) may preferably be: adding titanium dioxide, filler and cellulose into the obtained product in the step (1) at a stirring speed of 600-700 rpm, stirring for 30 minutes at a stirring speed of 1300-1400 rpm,
further, the step (3) may preferably be: slowly adding potassium silicate and the balance of defoaming agent into the obtained substance in the step (2), and stirring for 5 minutes at a stirring speed of 850-950 rpm.
Within the above range, the present invention can produce a silicate inorganic water-based paint having more excellent properties.
[ advantageous effects ]
In conclusion, the invention has the following beneficial effects:
the silicate inorganic water paint has extremely low organic content, but still has undetected VOC, fire-proof grade A1 grade and smoke toxicity grade AQ1 grade, and has very excellent performances of film forming property, adhesion, water resistance, high temperature resistance, scrubbing resistance, contrast ratio, mildew resistance and the like. In addition, the preparation method of the silicate inorganic water-based paint has simple and rapid operation steps, can be used for large-scale preparation, and is beneficial to industrial production.
Detailed Description
In order that those skilled in the art will more clearly understand the present invention, the following examples are given for further detailed description of the present invention, but it should be understood that the following examples are only preferred embodiments of the present invention, and the scope of the present invention as claimed should not be limited thereto.
< example >
Example 1
The following preparation process according to the invention was used to prepare silicate inorganic water-borne coatings:
(1) 0.6kg of dispersant SN-5040, 0.45kg of wetting agent BL9 and 0.25kg of defoamer AF-34 were added to 15kg of water in this order at a stirring speed of 650rpm,
(2) 13kg of titanium dioxide, 16.67kg of kaolin, 18.33kg of wollastonite and 0.45kg of cellulose were added to the resultant of step (1) while maintaining a stirring speed of 650rpm, followed by stirring at a stirring speed of 1350rpm for 30 minutes,
(3) to the resultant of the step (2), 35kg of potassium silicate (modulus 3.8) and 0.25kg of antifoaming agent AF-34 were slowly added while stirring at a stirring speed of 900rpm for 5 minutes.
Thus, the silicate inorganic water-based paint according to the present invention is prepared.
Example 2
The following preparation process according to the invention was used to prepare silicate inorganic water-borne coatings:
(1) 0.3kg of dispersant CROSFECT-3500, 0.1kg of wetting agent CROSFECT-202 and 0.05kg of antifoaming agent F-111 were added to 16kg of water in this order at a stirring speed of 700rpm,
(2) 14kg of titanium dioxide, 15.71kg of kaolin, 17.29kg of wollastonite and 0.5kg of cellulose were added to the resultant of the step (1) while maintaining the stirring speed of 700rpm, followed by stirring at a stirring speed of 1300rpm for 33 minutes,
(3) to the resultant of the step (2), 33kg of potassium silicate (modulus 3.9) and 0.05kg of antifoaming agent F-111 were slowly added while stirring at a stirring speed of 850rpm for 6 minutes.
Thus, the silicate inorganic water-based paint according to the present invention is prepared.
Example 3
The following preparation process according to the invention was used to prepare silicate inorganic water-borne coatings:
(1) 0.2kg of dispersant WJ-60, 0.1kg of wetting agent WJ-03 and 0.15kg of defoamer WJ-36 were added to 14kg of water in this order at a stirring speed of 600rpm,
(2) to the resultant of the step (1) were added 12kg of titanium dioxide, 17.14kg of kaolin, 18.86kg of wollastonite and 0.4kg of cellulose while maintaining a stirring speed of 600rpm, followed by stirring at a stirring speed of 1400rpm for 27 minutes,
(3) to the resultant of the step (2), 37kg of potassium silicate (modulus 3.7) and 0.15kg of antifoaming agent WJ-36 were slowly added while stirring at a stirring speed of 950rpm for 4 minutes.
Thus, the silicate inorganic water-based paint according to the present invention is prepared.
Example 4
The following preparation process according to the invention was used to prepare silicate inorganic water-borne coatings:
(1) 0.6kg of dispersant CROSFECT-3500, 0.2kg of wetting agent CROSFECT-202 and 0.35kg of defoamer WJ-36 were added to 16kg of water in this order at a stirring speed of 600rpm,
(2) 14kg of titanium dioxide, 16.67kg of kaolin, 18.33kg of wollastonite and 0.5kg of cellulose were added to the resultant of step (1) while maintaining a stirring speed of 600rpm, followed by stirring at a stirring speed of 1300rpm for 35 minutes,
(3) to the resultant of the step (2), 33kg of potassium silicate (modulus 3.8) and 0.35kg of antifoaming agent WJ-36 were slowly added while stirring at a stirring speed of 950rpm for 4 minutes.
Thus, the silicate inorganic water-based paint according to the present invention is prepared.
Example 5
The following preparation process according to the invention was used to prepare silicate inorganic water-borne coatings:
(1) 0.1kg of dispersant CROSFECT-3500, 0.8kg of wetting agent CROSFECT-202 and 0.1kg of defoamer WJ-36 were added to 14kg of water in this order at a stirring speed of 700rpm,
(2) 14kg of titanium dioxide, 16.38kg of kaolin, 18.02kg of wollastonite and 0.4kg of cellulose were added to the resultant of step (1) while maintaining a stirring speed of 700rpm, followed by stirring at a stirring speed of 1300rpm for 25 minutes,
(3) to the resultant of step (2), 36kg of potassium silicate (modulus 3.7) and 0.2kg of antifoaming agent WJ-36 were slowly added while stirring at a stirring speed of 900rpm for 6 minutes.
Thus, the silicate inorganic water-based paint according to the present invention is prepared.
Example 6
The following preparation process according to the invention was used to prepare silicate inorganic water-borne coatings:
(1) 1.0kg of dispersant CROSFECT-3600 and 0.5kg of defoamer AF-34 are added into 20kg of water in sequence at the stirring speed of 550rpm,
(2) 13.5kg of titanium dioxide, 15.24kg of kaolin, 16.76kg of wollastonite and 0.5kg of cellulose were added to the resultant obtained in step (1) while maintaining the stirring speed of 550rpm, followed by stirring at a stirring speed of 1250rpm for 35 minutes,
(3) to the resultant of the step (2), 32kg of potassium silicate (modulus 3.6) and 0.5kg of antifoaming agent AF-34 were slowly added while stirring at a stirring speed of 950rpm for 4 minutes.
Thus, the silicate inorganic water-based paint according to the present invention is prepared.
Example 7
The following preparation process according to the invention was used to prepare silicate inorganic water-borne coatings:
(1) 1.0kg of wetting agent BL9 and 0.3kg of defoamer WJ-36 were added to 10kg of water in this order at a stirring speed of 750rpm,
(2) 10kg of titanium dioxide, 18.10kg of kaolin, 19.90kg of wollastonite and 0.4kg of cellulose were added to the resultant of step (1) while maintaining a stirring speed of 750rpm, followed by stirring at a stirring speed of 1450rpm for 25 minutes,
(3) to the resultant of the step (2), 40kg of potassium silicate (modulus 3.9) and 0.3kg of antifoaming agent WJ-36 were slowly added while stirring at a stirring speed of 800rpm for 6 minutes.
Thus, the silicate inorganic water-based paint according to the present invention is prepared.
Example 8
The following preparation process according to the invention was used to prepare silicate inorganic water-borne coatings:
(1) 1.0kg of dispersant CROSFECT-3600 and 0.6kg of wetting agent BL9 were added to 13kg of water in sequence at a stirring speed of 500rpm,
(2) 15kg of titanium dioxide, 14.29kg of kaolin, 15.71kg of wollastonite and 0.4kg of cellulose were added to the resultant of the step (1) while maintaining the stirring speed of 500rpm, followed by stirring at a stirring speed of 1200rpm for 35 minutes,
(3) to the resultant of the step (2), 40kg of potassium silicate (modulus 4.0) was slowly added while stirring at a stirring speed of 1000rpm for 5 minutes.
Thus, the silicate inorganic water-based paint according to the present invention is prepared.
Example 9
The following preparation process according to the invention was used to prepare silicate inorganic water-borne coatings:
(1) 0.05kg of dispersant WJ-60, 0.05kg of wetting agent CROSFECT-202 and 0.25kg of defoamer AF-34 were added to 19kg of water in sequence at a stirring speed of 800rpm,
(2) 10kg of titanium dioxide, 19.05kg of kaolin, 20.95kg of wollastonite and 0.4kg of cellulose were added to the resultant of the step (1) while maintaining the stirring speed of 800rpm, followed by stirring at the stirring speed of 1500rpm for 25 minutes,
(3) to the resultant of the step (2), 30kg of potassium silicate (modulus 3.5) and 0.25kg of antifoaming agent AF-34 were slowly added while stirring at a stirring speed of 1000rpm for 6 minutes.
Thus, the silicate inorganic water-based paint according to the present invention is prepared.
Comparative example 1
A silicate inorganic water paint was obtained in the same manner as in example 1, except that sodium silicate was used instead of potassium silicate.
Comparative example 2
A silicate inorganic water paint was obtained in the same manner as in example 1, except that the modulus of the potassium silicate used was 3.2.
Comparative example 3
A silicate inorganic water paint was obtained in the same manner as in example 1, except that the modulus of the potassium silicate used was 4.2.
Comparative example 4
A silicate water-based paint was obtained in the same manner as in example 1, except that an acrylic emulsion (48% in terms of solid content) was used in place of 10kg of potassium silicate.
Comparative example 5
The silicate inorganic water-based paint is prepared by adopting the following preparation method:
(1) 1.5kg of wetting agent BL9 and 0.75kg of defoamer AF-34 were added successively to 11kg of water at a stirring speed of 650rpm,
(2) 14kg of titanium dioxide powder, 12.86kg of kaolin, 14.14kg of wollastonite and 1.0kg of cellulose were added to the resultant of step (1) while maintaining a stirring speed of 650rpm, followed by stirring at a stirring speed of 1250rpm for 30 minutes,
(3) to the resultant of step (2), 44kg of potassium silicate (modulus 3.7) and 0.75kg of antifoaming agent AF-34 were slowly added while stirring at a stirring speed of 950rpm for 5 minutes.
Thus, a silicate inorganic water-based paint was obtained.
Comparative example 6
The silicate inorganic water-based paint is prepared by adopting the following preparation method:
(1) 1.7kg of dispersant SN-5040 and 1.0kg of defoamer AF-34 were added successively to 23kg of water at a stirring speed of 650rpm,
(2) 7kg of titanium dioxide, 20.48kg of kaolin, 22.52kg of wollastonite and 0.3kg of cellulose were added to the resultant of step (1) while maintaining a stirring speed of 650rpm, followed by stirring at a stirring speed of 1250rpm for 30 minutes,
(3) to the resultant of step (2), 23kg of potassium silicate (modulus 3.7) and 1.0kg of antifoaming agent AF-34 were slowly added while stirring at a stirring speed of 900rpm for 5 minutes.
Thus, a silicate inorganic water-based paint was obtained.
Comparative example 7
The silicate inorganic water-based paint is prepared by adopting the following preparation method:
0.45kg of dispersant SN-5040, 0.6kg of wetting agent BL9, 0.5kg of defoamer AF-34, 15kg of water, 13kg of titanium dioxide, 16.67kg of kaolin, 18.33kg of wollastonite and 0.45kg of cellulose are stirred at a stirring speed of 650rpm, 35kg of potassium silicate (modulus 3.7) is added at a stirring speed of 1250rpm, and stirring is carried out for 30 minutes while maintaining the stirring speed of 1250 rpm. Thus, a silicate inorganic water-based paint was obtained.
< test examples >
The following performance measurements were performed on the silicate inorganic aqueous coating materials prepared according to the preparation method of the present invention in examples 1 to 9 and the silicate (inorganic) aqueous coating materials prepared in comparative examples 1 to 7, and the results thereof are shown in the following table 1.
(I) Coating stirring viscosity (KU): according to the national standard GB/T9269-2009 paint viscosity determination Stomer viscometer method.
(II) pH value: the measurement was carried out using a pH meter.
(III) contrast ratio (%): measured according to the national standard GB/T9756-2009 synthetic resin emulsion interior wall coating standard.
(IX) scrub resistance: the determination is carried out according to the national standard GB T9266-2009 building coating scrub resistance determination standard.
(X) stability on hot storage for 30 days: the stirring viscosity change value (KU) of the coating is determined according to the national standard GB 6753.3-86 coating storage stability test method.
(XI) fire performance: the method is determined according to the national standard GB 8624-2006 Classification of the combustion performance of the building materials and the products.
(XII) VOC (g/L): the determination is carried out according to the national standard GB 18582-2008 Limited national Standard for harmful substances of interior wall coatings.
(XIII) mildew resistance: the determination is carried out according to the national standard GB/T1741-2007 test method for the mould resistance of paint films.
(IX) Water resistance: the water resistance of the paint film was determined for 168 hours according to the national standard GB/T1733-1993 determination of the water resistance of the paint film.
[ Table 1]
| Measurement items | I | II | III | IX | X | XI | XII | XIII | IX |
| Example 1 | 98.3 | 10.7 | 97.1 | 9999 | +1 | A1+AQ1 | Not detected out | Level 0 | By passing |
| Example 2 | 95.5 | 10.4 | 97.0 | 8917 | +4 | A1+AQ1 | Not detected out | Level 0 | By passing |
| Example 3 | 97.3 | 10.8 | 96.6 | 9148 | +5 | A1+AQ1 | Not detected out | Level 0 | By passing |
| Example 4 | 94.1 | 10.5 | 96.8 | 8893 | +2 | A1+AQ1 | Not detected out | Level 0 | By passing |
| Example 5 | 99.6 | 10.7 | 96.5 | 9003 | +5 | A1+AQ1 | Not detected out | Level 0 | By passing |
| Example 6 | 96.7 | 10.4 | 96.1 | 8609 | +4 | A1+AQ1 | Not detected out | Level 0 | By passing |
| Example 7 | 97.5 | 10.8 | 95.3 | 9999 | +4 | A1+AQ1 | Not detected out | Level 0 | By passing |
| Example 8 | 97.7 | 10.7 | 97.1 | 9999 | +5 | A1+AQ1 | Not detected out | Level 0 | By passing |
| Example 9 | 99.2 | 10.3 | 95.2 | 8668 | +1 | A1+AQ1 | Not detected out | Level 0 | By passing |
| Comparative example 1 | 77.9 | 10.1 | 94.4 | 4776 | +14 | A1+AQ1 | Not detected out | Level 0 | Failed through |
| Comparative example 2 | 71.8 | 10.9 | 94.1 | 7794 | +21 | A1+AQ1 | Not detected out | Level 0 | Failed through |
| Comparative example 3 | 95.2 | 10.3 | 95.7 | 5327 | +5 | A1+AQ1 | Not detected out | Level 0 | Failed through |
| Comparative example 4 | 91.9 | 9.8 | 96 | 9396 | +3 | A2 | 6.9 | Level 1 | By passing |
| Comparative example 5 | 101.6 | 10.7 | 95.1 | 7876 | +3 | A1+AQ1 | Not detected out | Level 0 | Failed through |
| Comparative example 6 | 90.9 | 10.3 | 90.7 | 4277 | +12 | A1+AQ1 | Not detected out | Level 1 | Failed through |
| Comparative example 7 | 105.8 | 10.5 | 95.7 | 4404 | -17 | A1+AQ1 | Not detected out | Level 0 | By passing |
Referring to the above table 1, it can be seen that the aqueous coating prepared according to the present invention achieves superior technical effects in viscosity, contrast ratio, scrub resistance, stability, fire resistance, VOC, mold resistance and water resistance.
In contrast, in comparative example 1, sodium silicate was used instead of potassium silicate, and thus the resulting coating had poor scrub resistance, unsatisfactory water resistance, decreased viscosity and contrast ratio, and a large change in viscosity upon stirring after 30 days of thermal storage, indicating low stability. In comparative examples 2 and 3, potassium silicate with a lower modulus or a higher modulus is used, so that the scrub resistance of the coating is obviously poor, the water resistance does not reach the standard, and when the modulus is lower, the stirring viscosity of the coating is obviously reduced, and the change value of the stirring viscosity after 30 days of heat storage is very large, which indicates that the stability is poor. Comparative example 4 with the addition of the acrylic emulsion, the coating exhibited a significant decrease in fire performance, detected VOC, and also exhibited a decrease in mildew resistance rating. The composition ratio of comparative examples 5 and 6 is outside the range defined in the present invention, the scrub resistance of the coating is significantly poor, the water resistance is not up to the standard, and the contrast ratio, stability and mold resistance of comparative example 6 are also reduced. Comparative example 7 all components were added simultaneously and mixed, showing a significant decrease in scrub resistance and 30-day stability on hot storage.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.
Claims (10)
1. A silicate inorganic water-based paint is characterized by comprising the following components:
wherein the modulus of the potassium silicate is 3.5-4.0.
2. The silicate inorganic water-based paint according to claim 1, wherein the modulus of the potassium silicate is 3.7 to 3.9.
3. A silicate inorganic water-based paint according to claim 1, characterized by comprising the following components:
4. a silicate inorganic water-based paint according to claim 3, characterized by comprising the following components:
5. the silicate inorganic water-based paint as claimed in claim 1, wherein the filler comprises kaolin and wollastonite in a mass ratio of 1 (1.05-1.3).
6. The silicate inorganic water-based paint according to claim 1, wherein the dispersant is selected from any one of SN-5040, CROSFECT-3500, CROSFECT-3600, and WJ-60.
7. The silicate inorganic water-based paint according to claim 1, wherein the wetting agent is selected from any one of BL9, CROSFECT-202 and WJ-03.
8. The silicate inorganic water-based paint according to claim 1, wherein the defoaming agent is any one selected from AF-34, F-111 and WJ-36.
9. A method for preparing the silicate inorganic water-based paint according to any one of claims 1 to 8, characterized by comprising the steps of:
(1) adding a dispersing agent, a wetting agent and 1/3-2/3 dosage of a defoaming agent into water in sequence at a stirring speed of 500-800 rpm,
(2) adding titanium dioxide, filler and cellulose into the obtained product in the step (1) at a stirring speed of 500-800 rpm, stirring for 25-35 minutes at a stirring speed of 1200-1500 rpm,
(3) slowly adding potassium silicate and the balance of defoaming agent into the product obtained in the step (2), and stirring for 4-6 minutes at a stirring speed of 800-1000 rpm.
10. The method according to claim 9, wherein the step (1) is: adding a dispersing agent, a wetting agent and 1/2 dosage of a defoaming agent into water in turn at a stirring speed of 600-700 rpm,
the step (2) is as follows: adding titanium dioxide, filler and cellulose into the obtained product in the step (1) at a stirring speed of 600-700 rpm, stirring for 30 minutes at a stirring speed of 1300-1400 rpm,
the step (3) is as follows: slowly adding potassium silicate and the balance of defoaming agent into the obtained substance in the step (2), and stirring for 5 minutes at a stirring speed of 850-950 rpm.
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| CN112266636A (en) * | 2020-11-22 | 2021-01-26 | 湖南省金海科技有限公司 | Development and preparation method of antiviral water-based inorganic coating |
| CN112908431A (en) * | 2021-01-28 | 2021-06-04 | 中铁岩锋成都科技有限公司 | Design method of liquid silicate inorganic coating formula |
| CN114410130A (en) * | 2021-11-23 | 2022-04-29 | 江西广源化工有限责任公司 | Modified wollastonite and preparation method and application thereof |
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Application publication date: 20200922 |