CN113956735B - Diffuse reflection white composite board and production process thereof - Google Patents
Diffuse reflection white composite board and production process thereof Download PDFInfo
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- 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
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Abstract
The diffuse reflection white composite board comprises a plastic core board in the middle and aluminum boards on two sides, wherein the surfaces of the aluminum boards are coated with diffuse reflection paint; the diffuse reflection coating comprises the following components in parts by weight: 20-40 parts of organic silicon modified acrylate, 30-50 parts of white color paste, 0.1-1 part of defoaming agent, 0.1-2 parts of flatting agent and 5-10 parts of water; the white color paste comprises the following components in parts by weight: 10-30 parts of acrylate emulsion, 10-20 parts of surface hydroxylation modified hollow glass beads, 15-25 parts of nano titanium dioxide, 0.5-5 parts of silane coupling agent, 1-3 parts of dispersing agent and 3-8 parts of water. The utility model provides a white composite sheet of diffuse reflection obtains the diffuse reflection effect through coating the diffuse reflection coating at aluminum surface, has added hollow glass microballon and nanometer titanium dioxide in the white mill base in the diffuse reflection coating simultaneously, and the two cooperation helps obtaining higher reflectivity, improves the diffuse reflection effect, avoids light pollution, avoids producing visual fatigue.
Description
Technical Field
The application belongs to the technical field of aluminum-plastic composite boards, and particularly relates to a diffuse reflection white composite board and a production process thereof.
Background
The aluminum-plastic composite board is widely applied to the projects of renovating the outer wall of a building, the wall panel of a curtain, the reconstruction of an old building, the decoration of indoor walls and ceilings, advertising signboards, display racks and purification and dust prevention, and belongs to a novel building decoration material. The aluminum-plastic composite board is easy to process and form, is favorable for accelerating the project progress, shortening the construction period and reducing the cost, and is easy to maintain only by using a neutral cleaning agent and clean water for maintenance and cleaning, so that the aluminum-plastic composite board becomes a preferred material in building decoration. However, the surface of the aluminum-plastic composite board is smooth, so that strong concentrated reflection action is easily formed on the light, and light pollution is caused.
Diffuse reflection is a phenomenon in which light incident on a rough surface is reflected in various directions. When a parallel incident light beam strikes a rough surface, the surface reflects the light beam in all directions, so that although the incident light beams are parallel to each other, the reflected light beams are randomly reflected in different directions due to the non-uniform normal directions of the points, and the reflection is called "diffuse reflection" or "diffusion". The human eye can see the whole appearance of an object, and mainly images the object in the eye by diffuse reflection light. If the surface of an object is totally reflected unidirectionally, the appearance of the object is not clearly seen, and a glare interference phenomenon in a certain direction is caused.
Therefore, the diffuse reflection treatment of the surface of the aluminum-plastic composite board is necessary, so that the effects of avoiding light pollution and visual fatigue are achieved.
Disclosure of Invention
In order to solve the problems, the application discloses a diffuse reflection white composite board and a production process thereof, the diffuse reflection white composite board obtains a diffuse reflection effect by coating diffuse reflection paint on the surface of an aluminum plate, and hollow glass beads and nano titanium dioxide are added into white color paste in the diffuse reflection paint at the same time, so that the cooperation of the hollow glass beads and the nano titanium dioxide is beneficial to obtaining higher reflectivity, the diffuse reflection effect is improved, light pollution is avoided, and visual fatigue is avoided.
In a first aspect, the present application provides a diffuse reflection white composite board, which adopts the following technical scheme:
a diffuse reflection white composite board comprises a plastic core board in the middle and aluminum plates on two sides, wherein the surfaces of the aluminum plates are coated with diffuse reflection paint; the diffuse reflection coating comprises the following components in parts by weight: 20-40 parts of organic silicon modified acrylate, 30-50 parts of white color paste, 0.1-1 part of defoaming agent, 0.1-2 parts of flatting agent and 5-10 parts of water; the white color paste comprises the following components in parts by weight: 10-30 parts of acrylate emulsion, 10-20 parts of surface hydroxylation modified hollow glass beads, 15-25 parts of nano titanium dioxide, 0.5-5 parts of silane coupling agent, 1-3 parts of dispersing agent and 3-8 parts of water.
Preferably, the preparation method of the white color paste comprises the following steps: weighing the components in proportion, firstly uniformly mixing water, acrylate emulsion and a dispersing agent, then adding a silane coupling agent, stirring and dispersing for 5-10min, then adding the hollow glass beads with the surface modified by hydroxylation and the nano titanium dioxide, and stirring and dispersing for 10-30min under the condition of 2500 plus materials 3000r/min to obtain the white color paste.
Preferably, in the white color paste, the mass ratio of the hollow glass microspheres with the surface modified by hydroxylation to the nano titanium dioxide is 1: 1.2-1.8.
Preferably, the silane coupling agent includes a double bond-containing silane coupling agent.
Preferably, the silane coupling agent further comprises an anti-aging coupling agent, and the structural formula of the anti-aging coupling agent is as follows:
the preparation method of the anti-aging coupling agent comprises the following steps: adding 3- (3, 5-di-tert-butyl-4-hydroxyphenyl) allyl propionate and triethoxysilane in a molar ratio of 1:1 into a reaction kettle, adding 20ppm of a Pt-PMVS catalyst, stirring and heating to 90 ℃, continuing stirring and reacting for 8 hours after the 3- (3, 5-di-tert-butyl-4-hydroxyphenyl) allyl propionate is completely melted to obtain the anti-aging coupling agent, wherein the reaction equation is as follows:
preferably, the anti-aging coupling agent is used in an amount of 20 to 40% by mass based on the total mass of the silane coupling agent.
Preferably, the defoaming agent is a silicone defoaming agent.
Preferably, the leveling agent is an acrylate leveling agent.
In a second aspect, the present application provides a production process of a diffuse reflection white composite board, which adopts the following technical scheme:
a production process of a diffuse reflection white composite board comprises the following steps:
(1) pretreatment of an aluminum plate: wiping the surface of the aluminum plate with alcohol to remove oil, and then carrying out electrostatic dust removal;
(2) preparing a diffuse reflection coating: uniformly coating diffuse reflection coating on the surface of the aluminum plate, and curing to obtain the aluminum plate with the diffuse reflection coating on the surface;
(3) and compounding the aluminum plates on the two sides with the plastic core plate in the middle by using hot melt adhesive to obtain the diffuse reflection white composite plate.
The application has the following beneficial effects:
(1) the diffuse reflection white composite board obtains the diffuse reflection effect through coating the diffuse reflection coating on the surface of the aluminum plate, and hollow glass beads and nano titanium dioxide are added into white color paste in the diffuse reflection coating at the same time, so that the two are matched to help to obtain higher reflectivity, the diffuse reflection effect is improved, light pollution is avoided, and visual fatigue is avoided.
(2) According to the application, the mass ratio of the hollow glass beads to the nano titanium dioxide in the white color paste is 1:1.2-1.8, and the inventor finds that the hollow glass beads and the nano titanium dioxide in the ratio are beneficial to obtaining higher reflectivity and improving the diffuse reflection effect of the composite plate through a large number of experiments, in addition, the silane coupling agent with double bonds is added into the white color paste, and the hollow glass beads with surface hydroxylation modification are adopted, so that the silane coupling agent can be grafted on the surfaces of the nano titanium dioxide and the hollow glass beads, the steric hindrance is increased, the uniform dispersion of the nano titanium dioxide and the hollow glass beads in the color paste is facilitated, the double bonds of the silane coupling agent can be bonded with organic silicon modified acrylate in the coating curing process, and the cracking and pulverization time caused by coating aging is prolonged;
(3) the silane coupling agent used in the white color paste further comprises an anti-aging coupling agent, the structure with the anti-aging effect can be grafted on the surfaces of the hollow glass beads and the nano titanium dioxide by the anti-aging coupling agent instead of being added in a micromolecule manner like the traditional anti-aging agent, the anti-aging effect is prevented from being influenced by the migration and precipitation of the anti-aging agent after a period of time, the service life of the coating is prolonged, in addition, a benzene ring is arranged in the anti-aging coupling agent, larger steric hindrance can be provided, and the uniform dispersion of particles is facilitated.
Drawings
The present application is further described below with reference to the drawings and examples.
FIG. 1 is a schematic view of the construction of a diffuse reflective white composite panel according to the present application;
in the figure: 1. a plastic core board; 2. an aluminum plate.
Detailed Description
The present application will now be described in further detail with reference to examples.
As shown in fig. 1, the diffuse reflection white composite board comprises a plastic core board 1 in the middle and aluminum boards 2 at two sides, wherein the surfaces of the aluminum boards 2 are coated with diffuse reflection paint, and the preparation method is as follows.
Example 1
Preparing white color paste: weighing 10 parts of acrylate emulsion, 10 parts of surface hydroxylation modified hollow glass microspheres, 15 parts of nano titanium dioxide, 0.5 part of silane coupling agent KH570, 1 part of EFKA-4010 and 3 parts of water. Firstly, uniformly mixing water, acrylate emulsion and EFKA-4010, then adding a silane coupling agent KH570, stirring and dispersing for 5min, then adding hollow glass microspheres with surface hydroxylation modification and nano titanium dioxide, and stirring and dispersing for 30min under the condition of 2500r/min to obtain white color paste.
Preparing a diffuse reflection coating: uniformly mixing 20 parts of organic silicon modified acrylate, 30 parts of white color paste, 0.1 part of BYK024, 0.1 part of Modarez PW 336 and 5 parts of water, and grinding for 30min to obtain the diffuse reflection coating.
Preparing a diffuse reflection white composite board:
(1) pretreatment of an aluminum plate: wiping the surface of the aluminum plate with alcohol to remove oil, and then carrying out electrostatic dust removal;
(2) preparing a diffuse reflection coating: uniformly coating diffuse reflection coating on the surface of the aluminum plate, and curing to obtain the aluminum plate with the diffuse reflection coating on the surface;
(3) and compounding the aluminum plates on the two sides with the plastic core plate in the middle by using hot melt adhesive to obtain the diffuse reflection white composite plate.
Example 2
Preparing white color paste: weighing 30 parts of acrylate emulsion, 20 parts of surface hydroxylation modified hollow glass microspheres, 25 parts of nano titanium dioxide, 5 parts of silane coupling agent KH570, 3 parts of EFKA-4010 and 8 parts of water. Firstly, uniformly mixing water, acrylate emulsion and EFKA-4010, then adding a silane coupling agent KH570, stirring and dispersing for 10min, then adding hollow glass microspheres with surface hydroxylation modification and nano titanium dioxide, and stirring and dispersing for 10min under the condition of 3000r/min to obtain white color paste.
Preparing a diffuse reflection coating: uniformly mixing 40 parts of organic silicon modified acrylate, 50 parts of white color paste, 1 part of BYK024, 2 parts of Modarez PW 336 and 10 parts of water, and grinding for 30min to obtain the diffuse reflection coating.
Preparing a diffuse reflection white composite board:
(1) pretreatment of an aluminum plate: wiping the surface of the aluminum plate with alcohol to remove oil, and then carrying out electrostatic dust removal;
(2) preparing a diffuse reflection coating: uniformly coating diffuse reflection coating on the surface of the aluminum plate, and curing to obtain the aluminum plate with the diffuse reflection coating on the surface;
(3) and compounding the aluminum plates on the two sides with the plastic core plate in the middle by using hot melt adhesive to obtain the diffuse reflection white composite plate.
Example 3
Preparing white color paste: weighing 20 parts of acrylate emulsion, 15 parts of surface hydroxylation modified hollow glass microspheres, 20 parts of nano titanium dioxide, 3 parts of silane coupling agent KH570, 2 parts of EFKA-4010 and 5 parts of water. Firstly, uniformly mixing water, acrylate emulsion and EFKA-4010, then adding a silane coupling agent KH570, stirring and dispersing for 7min, then adding hollow glass microspheres with surface hydroxylation modification and nano titanium dioxide, stirring and dispersing for 20min under the condition of 2800r/min to obtain white color paste.
Preparing a diffuse reflection coating: uniformly mixing 30 parts of organic silicon modified acrylate, 40 parts of white color paste, 0.5 part of BYK024, 1 part of Modarez PW 336 and 7 parts of water, and grinding for 30min to obtain the diffuse reflection coating.
Preparing a diffuse reflection white composite board:
(1) pretreatment of an aluminum plate: wiping the surface of the aluminum plate with alcohol to remove oil, and then carrying out electrostatic dust removal;
(2) preparing a diffuse reflection coating: uniformly coating diffuse reflection coating on the surface of the aluminum plate, and curing to obtain the aluminum plate with the diffuse reflection coating on the surface;
(3) and compounding the aluminum plates on the two sides with the plastic core plate in the middle by using hot melt adhesive to obtain the diffuse reflection white composite plate.
Example 4
Preparing white color paste: weighing 20 parts of acrylate emulsion, 15 parts of surface hydroxylation modified hollow glass microspheres, 20 parts of nano titanium dioxide, 2 parts of silane coupling agent KH570, 1 part of anti-aging coupling agent, 2 parts of EFKA-4010 and 5 parts of water. Firstly, uniformly mixing water, acrylate emulsion and EFKA-4010, then adding a silane coupling agent KH570 and an anti-aging coupling agent, stirring and dispersing for 7min, then adding hollow glass microspheres with surface hydroxylation modification and nano titanium dioxide, and stirring and dispersing for 20min under the condition of 2800r/min to obtain white color paste.
Preparing a diffuse reflection coating: uniformly mixing 30 parts of organic silicon modified acrylate, 40 parts of white color paste, 0.5 part of BYK024, 1 part of Modarez PW 336 and 7 parts of water, and grinding for 30min to obtain the diffuse reflection coating.
Preparing a diffuse reflection white composite board:
(1) pretreatment of an aluminum plate: wiping the surface of the aluminum plate with alcohol to remove oil, and then carrying out electrostatic dust removal;
(2) preparing a diffuse reflection coating: uniformly coating diffuse reflection coating on the surface of the aluminum plate, and curing to obtain the aluminum plate with the diffuse reflection coating on the surface;
(3) and compounding the aluminum plates on the two sides with the plastic core plate in the middle by using hot melt adhesive to obtain the diffuse reflection white composite plate.
Example 5
Preparing white color paste: weighing 20 parts of acrylate emulsion, 15 parts of surface hydroxylation modified hollow glass microspheres, 20 parts of nano titanium dioxide, 1 part of silane coupling agent KH570, 2 parts of anti-aging coupling agent, 2 parts of EFKA-4010 and 5 parts of water. Firstly, uniformly mixing water, acrylate emulsion and EFKA-4010, then adding a silane coupling agent KH570 and an anti-aging coupling agent, stirring and dispersing for 7min, then adding hollow glass microspheres with surface hydroxylation modification and nano titanium dioxide, and stirring and dispersing for 20min under the condition of 2800r/min to obtain white color paste.
Preparing a diffuse reflection coating: uniformly mixing 30 parts of organic silicon modified acrylate, 40 parts of white color paste, 0.5 part of BYK024, 1 part of Modarez PW 336 and 7 parts of water, and grinding for 30min to obtain the diffuse reflection coating.
Preparing a diffuse reflection white composite board:
(1) pretreatment of an aluminum plate: wiping the surface of the aluminum plate with alcohol to remove oil, and then carrying out electrostatic dust removal;
(2) preparing a diffuse reflection coating: uniformly coating diffuse reflection coating on the surface of the aluminum plate, and curing to obtain the aluminum plate with the diffuse reflection coating on the surface;
(3) and compounding the aluminum plates on the two sides with the plastic core plate in the middle by using hot melt adhesive to obtain the diffuse reflection white composite plate.
Example 6
Preparing white color paste: weighing 20 parts of acrylate emulsion, 15 parts of surface hydroxylation modified hollow glass microspheres, 20 parts of nano titanium dioxide, 2.7 parts of silane coupling agent KH570, 0.3 part of anti-aging coupling agent, 2 parts of EFKA-4010 and 5 parts of water. Firstly, uniformly mixing water, acrylate emulsion and EFKA-4010, then adding a silane coupling agent KH570 and an anti-aging coupling agent, stirring and dispersing for 7min, then adding hollow glass microspheres with surface hydroxylation modification and nano titanium dioxide, and stirring and dispersing for 20min under the condition of 2800r/min to obtain white color paste.
Preparing a diffuse reflection coating: uniformly mixing 30 parts of organic silicon modified acrylate, 40 parts of white color paste, 0.5 part of BYK024, 1 part of Modarez PW 336 and 7 parts of water, and grinding for 30min to obtain the diffuse reflection coating.
Preparing a diffuse reflection white composite board:
(1) pretreatment of an aluminum plate: wiping the surface of the aluminum plate with alcohol to remove oil, and then carrying out electrostatic dust removal;
(2) preparing a diffuse reflection coating: uniformly coating diffuse reflection coating on the surface of the aluminum plate, and curing to obtain the aluminum plate with the diffuse reflection coating on the surface;
(3) and compounding the aluminum plates on the two sides with the plastic core plate in the middle by using hot melt adhesive to obtain the diffuse reflection white composite plate.
Example 7
Preparing white color paste: weighing 20 parts of acrylate emulsion, 17.5 parts of hollow glass microspheres with surface hydroxylation modification, 17.5 parts of nano titanium dioxide, 3 parts of silane coupling agent KH570, 2 parts of EFKA-4010 and 5 parts of water. Firstly, uniformly mixing water, acrylate emulsion and EFKA-4010, then adding a silane coupling agent KH570, stirring and dispersing for 7min, then adding hollow glass microspheres with surface hydroxylation modification and nano titanium dioxide, stirring and dispersing for 20min under the condition of 2800r/min to obtain white color paste.
Preparing a diffuse reflection coating: uniformly mixing 30 parts of organic silicon modified acrylate, 40 parts of white color paste, 0.5 part of BYK024, 1 part of Modarez PW 336 and 7 parts of water, and grinding for 30min to obtain the diffuse reflection coating.
Preparing a diffuse reflection white composite board:
(1) pretreatment of an aluminum plate: wiping the surface of the aluminum plate with alcohol to remove oil, and then carrying out electrostatic dust removal;
(2) preparing a diffuse reflection coating: uniformly coating diffuse reflection coating on the surface of the aluminum plate, and curing to obtain the aluminum plate with the diffuse reflection coating on the surface;
(3) and compounding the aluminum plates on the two sides with the plastic core plate in the middle by using hot melt adhesive to obtain the diffuse reflection white composite plate.
Example 8
Preparing white color paste: weighing 20 parts of acrylate emulsion, 10 parts of hollow glass beads subjected to surface hydroxylation modification, 25 parts of nano titanium dioxide, 3 parts of silane coupling agent KH570, 2 parts of EFKA-4010 and 5 parts of water. Firstly, uniformly mixing water, acrylate emulsion and EFKA-4010, then adding a silane coupling agent KH570, stirring and dispersing for 7min, then adding hollow glass microspheres with surface hydroxylation modification and nano titanium dioxide, stirring and dispersing for 20min under the condition of 2800r/min to obtain white color paste.
Preparing a diffuse reflection coating: uniformly mixing 30 parts of organic silicon modified acrylate, 40 parts of white color paste, 0.5 part of BYK024, 1 part of Modarez PW 336 and 7 parts of water, and grinding for 30min to obtain the diffuse reflection coating.
Preparing a diffuse reflection white composite board:
(1) pretreatment of an aluminum plate: wiping the surface of the aluminum plate with alcohol to remove oil, and then carrying out electrostatic dust removal;
(2) preparing a diffuse reflection coating: uniformly coating diffuse reflection coating on the surface of the aluminum plate, and curing to obtain the aluminum plate with the diffuse reflection coating on the surface;
(3) and compounding the aluminum plates on the two sides with the plastic core plate in the middle by using hot melt adhesive to obtain the diffuse reflection white composite plate.
Example 9
Preparing white color paste: weighing 20 parts of acrylate emulsion, 15 parts of surface hydroxylation modified hollow glass microspheres, 20 parts of nano titanium dioxide, 3 parts of anti-aging coupling agent, 2 parts of EFKA-4010 and 5 parts of water. Firstly, uniformly mixing water, acrylate emulsion and EFKA-4010, then adding a silane coupling agent KH570, stirring and dispersing for 7min, then adding hollow glass microspheres with surface hydroxylation modification and nano titanium dioxide, and stirring and dispersing for 20min under the condition of 2800r/min to obtain white color paste.
Preparing a diffuse reflection coating: uniformly mixing 30 parts of organic silicon modified acrylate, 40 parts of white color paste, 0.5 part of BYK024, 1 part of Modarez PW 336 and 7 parts of water, and grinding for 30min to obtain the diffuse reflection coating.
Preparing a diffuse reflection white composite board:
(1) pretreatment of an aluminum plate: wiping the surface of the aluminum plate with alcohol to remove oil, and then carrying out electrostatic dust removal;
(2) preparing a diffuse reflection coating: uniformly coating diffuse reflection coating on the surface of the aluminum plate, and curing to obtain the aluminum plate with the diffuse reflection coating on the surface;
(3) and compounding the aluminum plates on the two sides with the plastic core plate in the middle by using hot melt adhesive to obtain the diffuse reflection white composite plate.
Example 10
Preparing white color paste: weighing 20 parts of acrylate emulsion, 15 parts of surface hydroxylation modified hollow glass microspheres, 20 parts of nano titanium dioxide, 2 parts of silane coupling agent KH570, 1 part of antioxidant 1076, 2 parts of EFKA-4010 and 5 parts of water. Firstly, uniformly mixing water, acrylate emulsion and EFKA-4010, then adding a silane coupling agent KH570 and an anti-aging coupling agent, stirring and dispersing for 7min, then adding hollow glass microspheres with surface hydroxylation modification and nano titanium dioxide, and stirring and dispersing for 20min under the condition of 2800r/min to obtain white color paste.
Preparing a diffuse reflection coating: uniformly mixing 30 parts of organic silicon modified acrylate, 40 parts of white color paste, 0.5 part of BYK024, 1 part of Modarez PW 336 and 7 parts of water, and grinding for 30min to obtain the diffuse reflection coating.
Preparing a diffuse reflection white composite board:
(1) pretreatment of an aluminum plate: wiping the surface of the aluminum plate with alcohol to remove oil, and then carrying out electrostatic dust removal;
(2) preparing a diffuse reflection coating: uniformly coating diffuse reflection coating on the surface of the aluminum plate, and curing to obtain the aluminum plate with the diffuse reflection coating on the surface;
(3) and compounding the aluminum plates on the two sides with the plastic core plate in the middle by using hot melt adhesive to obtain the diffuse reflection white composite plate.
The diffuse reflection coatings prepared in examples 1 to 9 and comparative example 1 were subjected to performance tests, and the test results are shown in table 1.
TABLE 1
As can be seen from Table 1, the white color pastes of examples 1-3 only added silane coupling agent KH570, the impact resistance of the prepared diffuse reflection coatings all reached 50cm, the reflectivity reached 96.5-98.2%, and the double 85 aging test could reach more than 2500 hours without foaming, dropping, discoloration and cracking. Compared with the example 3, the silane coupling agent KH570 of 1/3 in the example 3 is replaced by the anti-aging coupling agent, so that the anti-aging performance of the diffuse reflection coating is effectively improved, and the diffuse reflection coating does not foam, fall off, discolor and crack after the double 85 aging test reaches more than 3000 hours. In example 5, compared with example 4, although the proportion of the anti-aging coupling agent is increased to 2/3, the KH570 content containing double bonds is reduced, so that nano titanium dioxide and hollow glass microspheres cannot be 'bundled' in the coating, and the coating cracks under the high-temperature and high-humidity condition of 3000 hours in a double 85 aging test, which shows that the anti-aging effect of the coating cannot be further improved by increasing the dosage of the anti-aging coupling agent. Example 6 compared with example 4, the anti-aging coupling agent is used in an amount of only 10% of the total amount of the silane coupling agent, and the anti-aging effect is reduced due to the small amount of the anti-aging coupling agent. Example 7 the increase in the content of hollow glass microspheres in the white paste compared to example 3, although increasing the reflectance, resulted in a decrease in the impact resistance. In example 8, the content of the hollow glass microspheres is reduced compared with example 3, resulting in a significant decrease in reflectance, indicating that a certain amount of the hollow glass microspheres contributes to an improvement in the reflection effect. In example 9, the KH570 was entirely replaced with the anti-aging coupling agent, but the anti-aging effect was inferior to that of example 4, which shows that the anti-aging effect was inferior after the bonding action between the silane coupling agent and the matrix resin was lost. In example 10, the antioxidant 1076 was used in place of the anti-aging coupling agent in the same amount by weight as in example 4, and the anti-aging effect in example 10 was improved as compared with example 3 by the addition of the anti-aging coupling agent, but was significantly reduced as compared with example 4. The anti-aging structure is introduced into the system by adopting the anti-aging coupling agent, so that the micromolecule antioxidant can be prevented from being migrated and separated out to lose the effect after a period of time, and the anti-aging effect is longer.
The present embodiment is merely illustrative and not restrictive, and various changes and modifications may be made by persons skilled in the art without departing from the scope of the present invention as defined in the appended claims. The technical scope of the present application is not limited to the contents of the specification, and must be determined according to the scope of the claims.
Claims (7)
1. A diffuse reflection white composite board is characterized in that: the aluminum plate comprises a plastic core plate in the middle and aluminum plates on two sides, wherein the surfaces of the aluminum plates are coated with diffuse reflection paint; the diffuse reflection coating comprises the following components in parts by weight: 20-40 parts of organic silicon modified acrylate, 30-50 parts of white color paste, 0.1-1 part of defoaming agent, 0.1-2 parts of flatting agent and 5-10 parts of water; the white color paste comprises the following components in parts by weight: 10-30 parts of acrylate emulsion, 10-20 parts of surface hydroxylation modified hollow glass beads, 15-25 parts of nano titanium dioxide, 0.5-5 parts of silane coupling agent, 1-3 parts of dispersing agent and 3-8 parts of water;
the silane coupling agent comprises a double-bond silane coupling agent and an anti-aging coupling agent, and the structural formula of the anti-aging coupling agent is as follows:
2. the diffusely reflecting white composite panel of claim 1, wherein: the preparation method of the white color paste comprises the following steps: weighing the components in proportion, firstly uniformly mixing water, acrylate emulsion and a dispersing agent, then adding a silane coupling agent, stirring and dispersing for 5-10min, then adding the hollow glass beads with the surface modified by hydroxylation and the nano titanium dioxide, and stirring and dispersing for 10-30min under the condition of 2500 plus materials 3000r/min to obtain the white color paste.
3. The diffusely reflecting white composite panel of claim 1, wherein: in the white color paste, the mass ratio of the hollow glass microspheres with the surface modified by hydroxylation to the nano titanium dioxide is 1: 1.2-1.8.
4. The diffusely reflecting white composite panel of claim 1, wherein: the dosage of the anti-aging coupling agent accounts for 20-40% of the total mass of the silane coupling agent.
5. The diffusely reflecting white composite panel of claim 1, wherein: the defoaming agent is an organic silicon defoaming agent.
6. The diffusely reflecting white composite panel of claim 1, wherein: the leveling agent is an acrylate leveling agent.
7. A process for producing a diffusely reflecting white composite panel as claimed in claim 1, wherein: the method comprises the following steps:
(1) pretreatment of an aluminum plate: wiping the surface of the aluminum plate with alcohol to remove oil, and then carrying out electrostatic dust removal;
(2) preparing a diffuse reflection coating: uniformly coating diffuse reflection coating on the surface of the aluminum plate, and curing to obtain the aluminum plate with the diffuse reflection coating on the surface;
(3) and compounding the aluminum plates on the two sides with the plastic core plate in the middle by using hot melt adhesive to obtain the diffuse reflection white composite plate.
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| CN101665648B (en) * | 2009-09-29 | 2012-11-07 | 武汉理工大学 | Preparation method of heat-reflecting insulation coating |
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| CN105219204A (en) * | 2015-10-30 | 2016-01-06 | 桂林市和鑫防水装饰材料有限公司 | A kind of novel acrylic ester waterproof paint |
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