CN110951102A - Flame-retardant PC board and preparation process thereof - Google Patents
Flame-retardant PC board and preparation process thereof Download PDFInfo
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Abstract
The invention discloses a flame-retardant PC board and a preparation process thereof, wherein the flame-retardant PC board comprises the following raw material components in parts by weight: 88-98 parts of polycarbonate, 1-15 parts of polyaluminosiloxane, 4-8 parts of a flame retardant, 2-4 parts of glass fiber, 0.1-0.3 part of a silane coupling agent, 0.3-0.6 part of a dispersing agent, 1-4 parts of a lubricating agent, 1-3 parts of a toughening agent and 36-42 parts of an anion UV coating.
Description
Technical Field
The invention relates to the technical field of PC boards, in particular to a flame-retardant PC board and a preparation process thereof.
Background
The PC board is also called polycarbonate board, kaplan board. The weak acid resistance is formed by using polycarbonate as a main component and adopting a CO-EXTRUSION technology CO-EXTRUSION, and shows that the PC board is resistant to neutral oil, strong acid, durability and alkali, and the PC board is not resistant to UV coating.
Since the materials treated by the halogen flame retardant will generate harmful halogen compounds during combustion, and pollute the environment, the research on the substitute materials of the halogen flame retardant becomes a research hotspot in the flame retardant field. At present, the halogen-free flame retardant applied to the PC mainly comprises a metal hydroxide flame retardant, a phosphorus flame retardant, a silicon flame retardant and the like, and a plurality of patents have been reported in this respect, such as U.S. Pat. Nos. 6,6451906 and 6706825 respectively adopt polysiloxane and sulfonate to cooperatively retard the flame of the PC, and Chinese patent No. CN1430643 adopts phosphate to retard the flame of the PC. Although the PC material in these patent publications about halogen-free flame retardation of PC obtains better flame retardation, there is still room for improvement in maintaining or even improving the mechanical and processing properties of PC material, and the UV resistance is poor.
Based on the above, the invention designs a flame retardant PC board and a preparation process thereof, so as to solve the above mentioned problems.
Disclosure of Invention
The invention aims to provide a flame-retardant PC board and a preparation process thereof, which aim to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: the flame-retardant PC board comprises the following raw material components in parts by weight:
88-98 parts of polycarbonate, 1-15 parts of polyaluminosiloxane, 4-8 parts of a flame retardant, 2-4 parts of glass fiber, 0.1-0.3 part of a silane coupling agent, 0.3-0.6 part of a dispersing agent, 1-4 parts of a lubricating agent, 1-3 parts of a toughening agent and 36-42 parts of a negative ion UV coating.
Preferably, the feed comprises the following raw material components in parts by weight: 88 parts of polycarbonate, 1 part of polyaluminosiloxane, 4 parts of a flame retardant, 2 parts of glass fiber, 0.1 part of a silane coupling agent, 0.3 part of a dispersing agent, 1 part of a lubricating agent, 1 part of a toughening agent and 36 parts of a negative ion UV coating.
Preferably, the feed comprises the following raw material components in parts by weight: 93 parts of polycarbonate, 8 parts of polyaluminosiloxane, 6 parts of a flame retardant, 3 parts of glass fiber, 0.2 part of a silane coupling agent, 0.4 part of a dispersing agent, 2.5 parts of a lubricating agent, 2 parts of a toughening agent and 40 parts of a negative ion UV coating.
Preferably, the polyaluminosiloxane can be prepared by the following method:
dissolving acetic acid or hydrochloric acid in water, adding silane, adjusting the pH value of a reaction system to 1.5-5.5, wherein the mass ratio of the silane to the water is 1: 10-20, stirring and hydrolyzing at 50-90 ℃ for 20-120 minutes to generate silanol, adding an organic solvent into the obtained product for extraction, removing a water phase, adding aluminum isopropoxide or aluminum triethoxide into the organic phase, and controlling the ratio of the feeding amount of the aluminum isopropoxide or aluminum triethoxide to the amount of silane substances to be 1: 0.5-3, reacting at the temperature of 60-130 ℃ for 2-10 hours, and removing the solvent from the reaction liquid by reduced pressure distillation after the reaction is finished to prepare the polyaluminosiloxane.
Preferably, the organic solvent is one or a mixture of more than two of hexane, heptane, methyl pentane, toluene and xylene.
Preferably, the flame retardant is prepared from ammonium bicarbonate, ammonium dihydrogen phosphate, dimethyl methylphosphonate, montmorillonite and pentaerythritol in a weight ratio of 1: 5: 2: 5: 10 are combined.
Preferably, the negative ion UV coating comprises the following components in percentage by weight:
20% of epoxy acrylate, 60% of tripropylene glycol diacrylate TPGDA, 5% of 2-hydroxy-2-methyl-1-phenyl-1-acetone, 10% of lithium potassium niobate and 5% of tourmaline.
Preferably, the negative ion UV coating can be prepared by the following method:
calculated according to 100 parts: weighing 60 parts of tripropylene glycol diacrylate TPGDA, accurately weighing 20 parts of epoxy acrylate, adding the epoxy acrylate, fully dispersing the mixture until the mixture is completely mixed, accurately weighing 5 parts of tourmaline, dispersing the tourmaline at a high speed until the mixture is completely mixed, accurately weighing 5 parts of 2-hydroxy-2-methyl-1-phenyl-1-acetone and 10 parts of lithium potassium niobate, fully dispersing the mixture until the mixture is completely dissolved, and fully dispersing the mixture until the mixture is completely mixed to obtain the negative ion UV coating.
A preparation process of a flame-retardant PC board comprises the following specific steps:
s1: selecting a mixture of polyaluminosiloxane, a silane coupling agent and a flame retardant, grinding the mixture by a grinding machine to obtain powder, screening the powder with the grinding particle size of 50-100 mu m by a screening device, mixing a certain amount of potassium permanganate solution and sodium nitrate solution, adjusting the pH value to 5.6 by sulfuric acid, placing the powder in the solution, standing for 0.5h, filtering out the powder, washing the filtered powder with water, drying, and roasting the dried powder for 3h at 200-400 ℃;
s2: grinding a mixture of polycarbonate, glass fiber, a dispersing agent, a lubricating agent and a toughening agent by a grinding machine to obtain powder, and screening the powder with the grinding particle size of 50-70 um by a screening device;
s3: fully mixing the powder in the step 1 and the powder in the step 2, and then smelting in a smelting furnace by adopting a high-temperature smelting method, wherein the smelting temperature is 1400-1700 ℃, and the smelting time is 2-3 h;
s4: selecting a mould, and pouring the melted mixed liquid in the step 3 into the mould for forming;
s5: annealing the cast PC board at the annealing temperature of 300-500 ℃ for 0.5-0.8 h, and cooling the annealed PC board to room temperature to obtain a product;
s6: putting the negative ion UV coating into a slurry tank of a coating machine, uniformly coating the PC board with rollers, wherein the thickness of a coating layer is 0.3mm, the working temperature is 110-120, and starting UV light irradiation to cure the negative ion UV coating into a film so as to form a negative ion UV coating film layer, thus obtaining the finished flame-retardant PC board;
s7: and (5) carrying out performance test on the finished flame-retardant PC board obtained in the step S6.
Preferably, the performance test comprises the steps of respectively testing the tensile strength and the bending strength of the finished flame-retardant PC board on a universal material testing machine; testing the impact strength of the finished flame-retardant PC board on an impact testing machine; the Vicat softening point temperature of the finished flame retardant PC board is tested by an XRW-300B type thermal deformation and microcard softening point temperature tester.
Compared with the prior art, the invention has the beneficial effects that:
1. the polyaluminosiloxane can not only effectively prevent the transfer of oxygen, heat and combustible gas, but also improve the compatibility of the glass fiber and each component in the PC board, thereby effectively improving the flame retardant property of the PC board and improving the good mechanical property of the PC board.
2. The flame retardant enables the flame retardant property to be better and superior, and meanwhile, ammonium bicarbonate, ammonium dihydrogen phosphate and dimethyl methylphosphonate are used for replacing polyphosphate, so that the using amount of the polyphosphate is reduced, the adverse factor on the mechanical property of the PC board is reduced, and the better flame retardant property of the PC board is improved.
3. Meanwhile, the solidified negative ion UV coating has the functions of inducing and releasing negative oxygen ions, can decompose formaldehyde and active oxygen in the air, reduce pollutants, nitrogen oxides, active oxygen generated by cigarettes and the like in the air and reduce the harm of excessive active oxygen to a human body through spontaneous ionization and spontaneous magnetization, and has the advantages of better expressive force of colors and patterns, convenient coating process, no need of baking in a drying tunnel, energy saving, low requirement on a coating substrate and wide application range.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a table comparing examples one, two and three of the present invention with a comparative example.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example one
The flame-retardant PC board comprises the following raw material components in parts by weight:
88 parts of polycarbonate, 1 part of polyaluminosiloxane, 4 parts of a flame retardant, 2 parts of glass fiber, 0.1 part of a silane coupling agent, 0.3 part of a dispersing agent, 1 part of a lubricating agent, 1 part of a toughening agent and 36 parts of a negative ion UV coating.
S1: selecting a mixture of polyaluminosiloxane, a silane coupling agent and a flame retardant, grinding the mixture by a grinding machine to obtain powder, screening the powder with the grinding particle size of 50-100 mu m by a screening device, mixing a certain amount of potassium permanganate solution and sodium nitrate solution, adjusting the pH value to 5.6 by sulfuric acid, placing the powder in the solution, standing for 0.5h, filtering out the powder, washing the filtered powder with water, drying, and roasting the dried powder for 3h at 200-400 ℃;
s2: grinding a mixture of polycarbonate, glass fiber, a dispersing agent, a lubricating agent and a toughening agent by a grinding machine to obtain powder, and screening the powder with the grinding particle size of 50-70 um by a screening device;
s3: fully mixing the powder in the step 1 and the powder in the step 2, and then smelting in a smelting furnace by adopting a high-temperature smelting method, wherein the smelting temperature is 1400-1700 ℃, and the smelting time is 2-3 h;
s4: selecting a mould, and pouring the melted mixed liquid in the step 3 into the mould for forming;
s5: annealing the cast PC board at the annealing temperature of 300-500 ℃ for 0.5-0.8 h, and cooling the annealed PC board to room temperature to obtain a product;
s6: putting the negative ion UV coating into a slurry tank of a coating machine, uniformly coating the PC board with rollers, wherein the thickness of a coating layer is 0.3mm, the working temperature is 110-120, and starting UV light irradiation to cure the negative ion UV coating into a film so as to form a negative ion UV coating film layer, thus obtaining the finished flame-retardant PC board;
s7: and (5) carrying out performance test on the finished flame-retardant PC board obtained in the step S6.
Example two
The flame-retardant PC board comprises the following raw material components in parts by weight:
93 parts of polycarbonate, 8 parts of polyaluminosiloxane, 6 parts of a flame retardant, 3 parts of glass fiber, 0.2 part of a silane coupling agent, 0.4 part of a dispersing agent, 2.5 parts of a lubricating agent, 2 parts of a toughening agent and 40 parts of a negative ion UV coating.
S1: selecting a mixture of polyaluminosiloxane, a silane coupling agent and a flame retardant, grinding the mixture by a grinding machine to obtain powder, screening the powder with the grinding particle size of 50-100 mu m by a screening device, mixing a certain amount of potassium permanganate solution and sodium nitrate solution, adjusting the pH value to 5.6 by sulfuric acid, placing the powder in the solution, standing for 0.5h, filtering out the powder, washing the filtered powder with water, drying, and roasting the dried powder for 3h at 200-400 ℃;
s2: grinding a mixture of polycarbonate, glass fiber, a dispersing agent, a lubricating agent and a toughening agent by a grinding machine to obtain powder, and screening the powder with the grinding particle size of 50-70 um by a screening device;
s3: fully mixing the powder in the step 1 and the powder in the step 2, and then smelting in a smelting furnace by adopting a high-temperature smelting method, wherein the smelting temperature is 1400-1700 ℃, and the smelting time is 2-3 h;
s4: selecting a mould, and pouring the melted mixed liquid in the step 3 into the mould for forming;
s5: annealing the cast PC board at the annealing temperature of 300-500 ℃ for 0.5-0.8 h, and cooling the annealed PC board to room temperature to obtain a product;
s6: putting the negative ion UV coating into a slurry tank of a coating machine, uniformly coating the PC board with rollers, wherein the thickness of a coating layer is 0.3mm, the working temperature is 110-120, and starting UV light irradiation to cure the negative ion UV coating into a film so as to form a negative ion UV coating film layer, thus obtaining the finished flame-retardant PC board;
s7: and (5) carrying out performance test on the finished flame-retardant PC board obtained in the step S6.
EXAMPLE III
The flame-retardant PC board comprises the following raw material components in parts by weight:
98 parts of polycarbonate, 15 parts of polyaluminosiloxane, 8 parts of a flame retardant, 4 parts of glass fiber, 0.3 part of a silane coupling agent, 0.6 part of a dispersing agent, 4 parts of a lubricating agent, 3 parts of a toughening agent and 42 parts of a negative ion UV coating.
S1: selecting a mixture of polyaluminosiloxane, a silane coupling agent and a flame retardant, grinding the mixture by a grinding machine to obtain powder, screening the powder with the grinding particle size of 50-100 mu m by a screening device, mixing a certain amount of potassium permanganate solution and sodium nitrate solution, adjusting the pH value to 5.6 by sulfuric acid, placing the powder in the solution, standing for 0.5h, filtering out the powder, washing the filtered powder with water, drying, and roasting the dried powder for 3h at 200-400 ℃;
s2: grinding a mixture of polycarbonate, glass fiber, a dispersing agent, a lubricating agent and a toughening agent by a grinding machine to obtain powder, and screening the powder with the grinding particle size of 50-70 um by a screening device;
s3: fully mixing the powder in the step 1 and the powder in the step 2, and then smelting in a smelting furnace by adopting a high-temperature smelting method, wherein the smelting temperature is 1400-1700 ℃, and the smelting time is 2-3 h;
s4: selecting a mould, and pouring the melted mixed liquid in the step 3 into the mould for forming;
s5: annealing the cast PC board at the annealing temperature of 300-500 ℃ for 0.5-0.8 h, and cooling the annealed PC board to room temperature to obtain a product;
s6: putting the negative ion UV coating into a slurry tank of a coating machine, uniformly coating the PC board with rollers, wherein the thickness of a coating layer is 0.3mm, the working temperature is 110-120, and starting UV light irradiation to cure the negative ion UV coating into a film so as to form a negative ion UV coating film layer, thus obtaining the finished flame-retardant PC board;
s7: and (5) carrying out performance test on the finished flame-retardant PC board obtained in the step S6.
Wherein, the polyaluminosiloxane can be prepared by the following method:
dissolving acetic acid or hydrochloric acid in water, adding silane, adjusting the pH value of a reaction system to 1.5-5.5, wherein the mass ratio of the silane to the water is 1: 10-20, stirring and hydrolyzing at 50-90 ℃ for 20-120 minutes to generate silanol, adding an organic solvent into the obtained product for extraction, removing a water phase, adding aluminum isopropoxide or aluminum triethoxide into the organic phase, and controlling the ratio of the feeding amount of the aluminum isopropoxide or aluminum triethoxide to the amount of silane substances to be 1: 0.5-3, reacting at 60-130 ℃ for 2-10 hours, and after the reaction is finished, distilling the reaction liquid under reduced pressure to remove the solvent to obtain the polyaluminosiloxane, wherein the organic solvent is one or a mixture of more than two of hexane, heptane, methyl pentane, toluene and xylene.
Wherein the flame retardant is prepared from ammonium bicarbonate, ammonium dihydrogen phosphate, dimethyl methylphosphonate, montmorillonite and pentaerythritol according to the weight ratio of 1: 5: 2: 5: 10 are combined.
The negative ion UV coating comprises the following components in percentage by weight:
20% of epoxy acrylate, 60% of tripropylene glycol diacrylate TPGDA, 5% of 2-hydroxy-2-methyl-1-phenyl-1-acetone, 10% of lithium potassium niobate and 5% of tourmaline.
The negative ion UV coating can be prepared by the following method:
calculated according to 100 parts: weighing 60 parts of tripropylene glycol diacrylate TPGDA, accurately weighing 20 parts of epoxy acrylate, adding the epoxy acrylate, fully dispersing the mixture until the mixture is completely mixed, accurately weighing 5 parts of tourmaline, dispersing the tourmaline at a high speed until the mixture is completely mixed, accurately weighing 5 parts of 2-hydroxy-2-methyl-1-phenyl-1-acetone and 10 parts of lithium potassium niobate, fully dispersing the mixture until the mixture is completely dissolved, and fully dispersing the mixture until the mixture is completely mixed to obtain the negative ion UV coating.
As shown in FIG. 1, the invention carries out performance tests on the first embodiment, the second embodiment, the third embodiment and the comparative embodiment, wherein the performance tests comprise that the tensile strength and the bending strength of the finished flame-retardant PC board are respectively tested on a universal material testing machine; testing the impact strength of the finished flame-retardant PC board on an impact testing machine; the Vicat softening point temperature of the finished flame retardant PC board is tested by an XRW-300B type thermal deformation and microcard softening point temperature tester. As can be seen from the figure: compared with the traditional PC board, the flame-retardant PC board prepared by the invention has the advantages that the tensile strength, the bending strength, the impact strength and the Vicat softening point temperature are improved, various performances of the PC board are improved, and the PC board is efficient, environment-friendly and excellent in mechanical property
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims (10)
1. A flame retardant grade PC board, comprising: the composite material comprises the following raw material components in parts by weight:
88-98 parts of polycarbonate, 1-15 parts of polyaluminosiloxane, 4-8 parts of a flame retardant, 2-4 parts of glass fiber, 0.1-0.3 part of a silane coupling agent, 0.3-0.6 part of a dispersing agent, 1-4 parts of a lubricating agent, 1-3 parts of a toughening agent and 36-42 parts of a negative ion UV coating.
2. A fire retardant grade PC board according to claim 1, wherein: the composite material comprises the following raw material components in parts by weight: 88 parts of polycarbonate, 1 part of polyaluminosiloxane, 4 parts of a flame retardant, 2 parts of glass fiber, 0.1 part of a silane coupling agent, 0.3 part of a dispersing agent, 1 part of a lubricating agent, 1 part of a toughening agent and 36 parts of a negative ion UV coating.
3. A fire retardant grade PC board according to claim 1, wherein: the composite material comprises the following raw material components in parts by weight: 93 parts of polycarbonate, 8 parts of polyaluminosiloxane, 6 parts of a flame retardant, 3 parts of glass fiber, 0.2 part of a silane coupling agent, 0.4 part of a dispersing agent, 2.5 parts of a lubricating agent, 2 parts of a toughening agent and 40 parts of a negative ion UV coating.
4. A fire retardant grade PC board according to claim 1, wherein: the polyaluminosiloxane can be prepared by the following method:
dissolving acetic acid or hydrochloric acid in water, adding silane, adjusting the pH value of a reaction system to 1.5-5.5, wherein the mass ratio of the silane to the water is 1: 10-20, stirring and hydrolyzing at 50-90 ℃ for 20-120 minutes to generate silanol, adding an organic solvent into the obtained product for extraction, removing a water phase, adding aluminum isopropoxide or aluminum triethoxide into the organic phase, and controlling the ratio of the feeding amount of the aluminum isopropoxide or aluminum triethoxide to the amount of silane substances to be 1: 0.5-3, reacting at the temperature of 60-130 ℃ for 2-10 hours, and removing the solvent from the reaction liquid by reduced pressure distillation after the reaction is finished to prepare the polyaluminosiloxane.
5. A flame retardant grade PC board according to claim 4, wherein: the organic solvent is one or a mixture of more than two of hexane, heptane, methyl pentane, toluene and xylene.
6. A fire retardant grade PC board according to claim 1, wherein: the flame retardant is prepared from ammonium bicarbonate, ammonium dihydrogen phosphate, dimethyl methylphosphonate, montmorillonite and pentaerythritol according to the weight ratio of 1: 5: 2: 5: 10 are combined.
7. A fire retardant grade PC board according to claim 1, wherein: the negative ion UV coating comprises the following components in percentage by weight:
20% of epoxy acrylate, 60% of tripropylene glycol diacrylate TPGDA, 5% of 2-hydroxy-2-methyl-1-phenyl-1-acetone, 10% of lithium potassium niobate and 5% of tourmaline.
8. A fire retardant grade PC board according to claim 1, wherein: the negative ion UV coating can be prepared by the following method:
calculated according to 100 parts: weighing 60 parts of tripropylene glycol diacrylate TPGDA, accurately weighing 20 parts of epoxy acrylate, adding the epoxy acrylate, fully dispersing the mixture until the mixture is completely mixed, accurately weighing 5 parts of tourmaline, dispersing the tourmaline at a high speed until the mixture is completely mixed, accurately weighing 5 parts of 2-hydroxy-2-methyl-1-phenyl-1-acetone and 10 parts of lithium potassium niobate, fully dispersing the mixture until the mixture is completely dissolved, and fully dispersing the mixture until the mixture is completely mixed to obtain the negative ion UV coating.
9. A preparation process of a flame-retardant PC board is characterized by comprising the following steps: the method comprises the following specific steps:
s1: selecting a mixture of polyaluminosiloxane, a silane coupling agent and a flame retardant, grinding the mixture by a grinding machine to obtain powder, screening the powder with the grinding particle size of 50-100 mu m by a screening device, mixing a certain amount of potassium permanganate solution and sodium nitrate solution, adjusting the pH value to 5.6 by sulfuric acid, placing the powder in the solution, standing for 0.5h, filtering out the powder, washing the filtered powder with water, drying, and roasting the dried powder for 3h at 200-400 ℃;
s2: grinding a mixture of polycarbonate, glass fiber, a dispersing agent, a lubricating agent and a toughening agent by a grinding machine to obtain powder, and screening the powder with the grinding particle size of 50-70 um by a screening device;
s3: fully mixing the powder in the step 1 and the powder in the step 2, and then smelting in a smelting furnace by adopting a high-temperature smelting method, wherein the smelting temperature is 1400-1700 ℃, and the smelting time is 2-3 h;
s4: selecting a mould, and pouring the melted mixed liquid in the step 3 into the mould for forming;
s5: annealing the cast PC board at the annealing temperature of 300-500 ℃ for 0.5-0.8 h, and cooling the annealed PC board to room temperature to obtain a product;
s6: putting the negative ion UV coating into a slurry tank of a coating machine, uniformly coating the PC board with rollers, wherein the thickness of a coating layer is 0.3mm, the working temperature is 110-120, and starting UV light irradiation to cure the negative ion UV coating into a film so as to form a negative ion UV coating film layer, thus obtaining the finished flame-retardant PC board;
s7: and (5) carrying out performance test on the finished flame-retardant PC board obtained in the step S6.
10. The process of claim 1 for preparing a flame retardant grade PC board, wherein: the performance test comprises the steps of respectively testing the tensile strength and the bending strength of the finished flame-retardant PC board on a universal material testing machine; testing the impact strength of the finished flame-retardant PC board on an impact testing machine; the Vicat softening point temperature of the finished flame retardant PC board is tested by an XRW-300B type thermal deformation and microcard softening point temperature tester.
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