CN110509579B - Method for manufacturing PMMA alloy-PC composite board - Google Patents
Method for manufacturing PMMA alloy-PC composite board Download PDFInfo
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- CN110509579B CN110509579B CN201910862177.5A CN201910862177A CN110509579B CN 110509579 B CN110509579 B CN 110509579B CN 201910862177 A CN201910862177 A CN 201910862177A CN 110509579 B CN110509579 B CN 110509579B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/22—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of indefinite length
- B29C43/24—Calendering
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D7/00—Producing flat articles, e.g. films or sheets
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L69/00—Compositions of polycarbonates; Compositions of derivatives of polycarbonates
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Abstract
The invention discloses a method for manufacturing a PMMA alloy-PC composite board, which comprises the following preparation steps: (a) placing an antioxidant and a UV stabilizer in a stirrer, stirring at a rotating speed of 60r/min for 2-3 minutes, then stirring at a rotating speed of 360r/min for 5-6 minutes to form a premix, and placing the premix in a granulator to prepare particles A; (b) placing the PMMA block composition, polycarbonate A and the particles A prepared in the step (a) into a granulator to prepare particles B; (c) adding the particles B and the polycarbonate B into an extruder respectively to be extruded to form a composite layer, wherein the composite layer comprises a layer A and a layer B, the layer A accounts for 5% -20% of the total thickness of the composite layer, the layer A is formed by extruding the particles B after being melted and plasticized, the layer B is formed by extruding the polycarbonate B after being melted and plasticized, and the composite layer is rolled and molded at constant temperature to form the PMMA alloy-PC composite plate. The invention solves the problem of poor interface compatibility of the PMMA alloy-PC composite board, and reduces the performance requirements on the mold and the injection molding machine in the later in-mold injection molding process.
Description
Technical Field
The invention relates to a manufacturing method of a composite board, in particular to a manufacturing method of a PMMA alloy-PC composite board.
Background
Polycarbonate is also called PC, has the characteristics of colorless transparency, heat resistance, flame retardance, high strength, high elastic coefficient, high impact strength, wide application temperature range and the like, and is widely applied to the fields of mobile phones, personal computers, home decoration surfaces and the like. PMMA is a colorless and transparent plastic material, is called polymethyl methacrylate (PMMA) completely, is also called acrylic, acrylic or organic glass, and has higher hardness compared with PC.
At present, some manufacturers in the market try to combine PMMA or PMMA alloy materials with PC materials to form a new material with high elasticity and high hardness, but because the PC materials and the PMMA materials have the problems of large stress strain and poor interface compatibility, the finished double-layer composite board is easy to delaminate and fall off. In order to avoid the above problems, it is common practice to mix two materials before extrusion molding to form a mixed material, and then perform calendering on the mixed material, and the final board is a single-layer sheet, which cannot be used to manufacture a double-layer or multi-layer composite board, so that improvement is needed.
Disclosure of Invention
The invention provides a novel method for manufacturing a PMMA alloy-PC composite board, aiming at the defects that a double-layer composite board in the prior art is easy to warp, delaminate, fall off and the like.
In order to solve the technical problems, the invention is realized by the following technical scheme:
a manufacturing method of a PMMA alloy-PC composite board comprises the following preparation steps:
(a) taking 3-4 parts of antioxidant and 1-2 parts of UV stabilizer according to parts by weight, placing the antioxidant and the UV stabilizer in a stirrer, stirring at a rotating speed of 60r/min for 2-3 minutes, then stirring at a rotating speed of 360r/min for 5-6 minutes to form a premix, and placing the premix in a granulator to prepare particles A;
(b) taking 29-30 parts by weight of PMMA block composition and 63-87 parts by weight of polycarbonate A, and putting the PMMA block composition, the polycarbonate A and the particles A prepared in the step (a) into a granulator to prepare particles B, wherein the temperature of a first section of the granulator is 212-225 ℃, the temperature of a second section of the granulator is 220-235 ℃, the temperature of a third section of the granulator is 230-245 ℃, the temperature of a neck mold is 250-290 ℃, the plasticizing residence time is 1-2 minutes, and the absolute vacuum pressure is 0.06-0.08 MPa;
(c) taking polycarbonate B, adding the particles B and the polycarbonate B into an extruder respectively, extruding the polycarbonate B and the particles B from a die head of the extruder after the polycarbonate B and the particles B are melted and plasticized to form a composite layer, wherein the composite layer comprises a layer A and a layer B, the layer A accounts for 5% -20% of the total thickness of the composite layer, the layer A is formed by extruding the particles B after the particles B are melted and plasticized, the layer B is formed by extruding the polycarbonate B after the polycarbonate B is melted and plasticized, and the composite layer is formed by calendering and molding through a constant temperature roller to form the PMMA alloy-PC composite plate.
In the step (a), a certain amount of antioxidant and UV stabilizer are uniformly mixed to prepare the particles A which are convenient to operate and transfer.
In the step (B), the PMMA block composition, the polycarbonate A and the particles A are put into a granulator to prepare particles B made of PMMA alloy materials, and the particles B have the characteristics of low water absorption and high hardness. The granulator is spatially divided into three sections, and the temperature of each section of the granulator is respectively controlled in the plasticizing process so as to improve the granulating quality. The temperature of the neck ring mold is controlled to be 250-290 ℃, the absolute vacuum pressure is controlled to be 0.06-0.08 Mpa, and the particles B are ensured to have a better molding state.
The plasticizing residence time refers to the time from heating and melting to extruding after the PMMA block composition, the polycarbonate A and the particles A enter a granulator, and the plasticizing residence time is controlled to be 1-2 minutes, so that the components can be fully mixed, and the production efficiency can be considered at the same time.
In the step (c), the particles B prepared in the step (B) and the polycarbonate B form a composite layer with a double-layer structure through an extruder, wherein the layer A prepared from the particles B has the characteristics of low water absorption and high hardness, and the thickness of the layer A accounts for 5-20% of the total thickness of the composite layer, so that the finally formed PMMA alloy-PC composite plate has high hardness and proper elasticity. Through the operation, two materials with originally great differences of physical parameters are converted into materials with equivalent physical parameters, and the PMMA alloy-PC composite board is close to one layer as a whole. Meanwhile, the sensitivity of the layer B with polycarbonate B as the main component to temperature and humidity is relatively close to that of the layer A, so that the layer A and the layer B have lower stress strain.
Preferably, in the above method for manufacturing a PMMA alloy-PC composite plate, in the step (b), the PMMA block composition is prepared by the following steps:
taking the following components in parts by weight:
45-65 parts of a monomer A,
15-20 parts of a monomer B,
1 to 1.5 parts of an initiator,
35-45 parts of n-butyl alcohol,
3 parts of a chain transfer agent;
adding the n-butyl alcohol, the monomer A and the monomer B into a reaction kettle, stirring and mixing uniformly, then adding the initiator, heating the reaction kettle to 55 ℃, then heating the reaction kettle to 80 ℃ from 55 ℃ within 55-65 minutes, then keeping the temperature of 80 ℃ for reaction for 1 hour, then dropwise adding the chain transfer agent, carrying out polymerization reaction for 2 hours at the polymerization reaction temperature of 83-85 ℃, then cooling, discharging, evaporating the solvent, and crushing to obtain the PMMA block composition.
The PMMA block composition is an important component of the PMMA alloy, and is prepared by uniformly mixing n-butyl alcohol, a monomer A and a monomer B, reacting in a reaction kettle, dropwise adding a chain transfer agent, discharging, evaporating a solvent and crushing. The PMMA block composition can improve the temperature resistance of the non-temperature-resistant PMMA alloy, reduce granulation yellowing, and reduce the water absorption of the material.
Preferably, in the above method for manufacturing a PMMA alloy-PC composite board, the thermostatic roller in step (c) includes a first roller, a second roller, and a third roller, and the composite layer is rolled by the first roller and then is sequentially rolled and molded by the second roller and the third roller to form the PMMA alloy-PC composite board.
And respectively carrying out three-roller calendering molding on the composite layer formed by extrusion from the die head to form the PMMA alloy-PC composite board, so that the finally formed PMMA alloy-PC composite board has better uniformity, a relatively flat and uniform surface is formed, and the relative thicknesses of the layer A and the layer B are relatively stable.
Preferably, in the method for manufacturing the PMMA alloy-PC composite board, the first roll is a flexible roll, the second roll and the third roll are rigid rolls, and the surface temperature of the first roll, the second roll and the third roll is 100 to 140 ℃.
The first roller adopting the flexible roller can better stretch the composite layer, and the subsequent two rigid rollers can better shape the composite layer. The surface temperature of the first roller, the second roller and the third roller is set to be 100-140 ℃, so that the composite layer can be better ensured to have better ductility in the calendering process. In addition, the thickness uniformity of the PMMA alloy-PC composite board can be improved to a higher level by adopting the flexible roller, and the stress residue caused by uneven thickness of each part is reduced.
Preferably, in the above method for manufacturing a PMMA alloy-PC composite plate, the monomer a is any one of methyl methacrylate, butyl acrylate and methacrylic acid or a mixture of any two or more of methyl methacrylate, butyl acrylate and methacrylic acid.
The materials are selected as the monomer A, so that the weather resistance and high light transmittance of the material can be ensured.
Preferably, in the above method for manufacturing a PMMA alloy-PC composite plate, the monomer B is one of bismaleimide, N-phenylmaleimide and N-cyclohexylmaleimide, or a mixture of any two or more thereof.
The above substances are selected as the monomer B, so that the temperature resistance of the PMMA alloy can be improved, and the water absorption rate is further reduced.
Preferably, in the method for manufacturing the PMMA alloy-PC composite board, the chain transfer agent is mercaptohydroxy malic acid, and the initiator is dibenzoyl peroxide.
The mercapto group in the mercapto compound is a relatively weak group, and has high efficiency as a chain transfer agent.
Preferably, in the step (a), the antioxidant is any one or a mixture of more than two of 2, 6-di-tert-butyl-4-aminophenol, basf antioxidant Irganox B225, basf Irganox 1010 and tris (2.4-di-tert-butylphenyl) phosphite.
The above substances are selected as the antioxidant, so that the antioxidant has high-efficiency capacity of resisting and capturing free radicals and has long-term efficacy.
Preferably, in the above method for manufacturing a PMMA alloy-PC composite plate, in the step (a), the UV stabilizer is one of or a mixture of two or more of a basf stabilizer Tinuvin326, Tinuvin944, 2, 4, 6-tris (2' n-butoxyphenyl) -1, 3, 5-triazine, 4-benzoyloxy-2, 2, 6, 6-tetramethylpiperidine, tris (1, 2, 2, 6, 6-pentamethylpiperidinyl) phosphite, resorcinol monobenzoate, and 2-hydroxy-4-n-octyloxybenzophenone.
The UV stabilizer is low in volatility and strong in thermal degradation resistance at high temperature, and can effectively block and absorb ultraviolet rays.
Preferably, in the above method for manufacturing a PMMA alloy-PC composite plate, in the step (a), the particle size of the particles a is in a range of 1mm to 3 mm.
The particle size range can ensure that the particles A have better fluidity and are easier to form in the manufacturing process. The particle diameter of the particle A is consistent with that of other materials, so that the materials are not layered during stirring, and the uniformity is improved.
Example 1
A manufacturing method of a PMMA alloy-PC composite board comprises the following preparation steps:
(a) taking 3 parts of antioxidant and 1 part of UV stabilizer according to parts by weight, placing the antioxidant and the UV stabilizer in a stirrer, stirring at the rotating speed of 60r/min for 2 minutes, then stirring at the rotating speed of 360r/min for 5 minutes to form a premix, and placing the premix in a granulator to prepare particles A;
(b) taking 29 parts of PMMA block composition and 67 parts of polycarbonate A according to parts by weight, and putting the PMMA block composition, the polycarbonate A and the particles A prepared in the step (a) into a granulator to prepare particles B, wherein the first-stage temperature of the granulator is 212 ℃, the second-stage temperature of the granulator is 220 ℃, the third-stage temperature of the granulator is 230 ℃, the die temperature of the granulator is 250 ℃, the plasticizing residence time of the granulator is 1 minute, and the absolute vacuum pressure of the granulator is 0.06 Mpa;
(c) taking polycarbonate B, adding the particles B and the polycarbonate B into an extruder respectively, extruding the polycarbonate B and the particles B from a die head of the extruder after the polycarbonate B and the particles B are melted and plasticized to form a composite layer, wherein the composite layer comprises a layer A and a layer B, the layer A accounts for 5% of the total thickness of the composite layer, the layer A is formed by extruding the particles B after the particles B are melted and plasticized, the layer B is formed by extruding the polycarbonate B after the particles B are melted and plasticized, and the composite layer is formed by calendering and molding through a constant-temperature roller to form the PMMA alloy-PC composite plate.
Preferably, in the step (b), the PMMA block composition is prepared by the following method:
taking the following components in parts by weight:
45 parts of a monomer A, namely,
15 parts of a monomer B, namely,
1 part of an initiator, namely,
35 parts of n-butyl alcohol,
3 parts of a chain transfer agent;
adding the n-butyl alcohol, the monomer A and the monomer B into a reaction kettle, stirring and mixing uniformly, then adding the initiator, heating the reaction kettle to 55 ℃, then heating the reaction kettle to 80 ℃ from 55 ℃ within 55 minutes, then keeping the temperature of 80 ℃ for reaction for 1 hour, then dropwise adding the chain transfer agent, carrying out polymerization reaction for 2 hours at the polymerization reaction temperature of 83 ℃, then cooling, discharging, evaporating the solvent and crushing to obtain the PMMA block composition.
Preferably, the constant temperature roll in the step (c) includes a first roll, a second roll and a third roll, and the composite layer is rolled by the first roll and then sequentially rolled and formed by the second roll and the third roll to form the PMMA alloy-PC composite plate.
Preferably, the first roll is a flexible roll, the second roll and the third roll are rigid rolls, and the surface temperature of the first roll, the second roll and the third roll is 100 ℃.
Preferably, the monomer A is any one of methyl methacrylate, butyl acrylate and methacrylic acid or a mixture of any two or more of methyl methacrylate, butyl acrylate and methacrylic acid.
Preferably, the monomer B is one of bismaleimide, N-phenylmaleimide and N-cyclohexylmaleimide or a mixture of any two or more of the bismaleimide, the N-phenylmaleimide and the N-cyclohexylmaleimide.
Preferably, the chain transfer agent is mercaptohydroxy malic acid, and the initiator is dibenzoyl peroxide.
Preferably, in the step (a), the antioxidant is any one or a mixture of two or more of 2, 6-di-tert-butyl-4-aminophenol, basf antioxidant Irganox B225, basf Irganox 1010 and tris 2.4-di-tert-butylphenyl phosphite.
Preferably, in the step (a), the UV stabilizer is any one of or a mixture of any two or more of a basf stabilizer Tinuvin326, Tinuvin944, 2, 4, 6-tris 2' n-butoxyphenyl-1, 3, 5-triazine, 4-benzoyloxy-2, 2, 6, 6-tetramethylpiperidine, tris 1, 2, 2, 6, 6-pentamethylpiperidinyl phosphite, resorcinol monobenzoate, and 2-hydroxy-4-n-octyloxybenzophenone.
Preferably, in the step (a), the particle size of the particles a is in the range of 1 mm.
The PMMA alloy-PC composite board prepared by the embodiment is tested, and the parameters are as follows:
the light transmittance was 92.3%, the haze was 0.1%, the warpage was 0.2%, the pencil hardness was H, and the heat shrinkage at 130 ℃ for 30 minutes was 0%.
Example 2
A manufacturing method of a PMMA alloy-PC composite board comprises the following preparation steps:
(a) taking 4 parts of antioxidant and 2 parts of UV stabilizer according to parts by weight, placing the antioxidant and the UV stabilizer in a stirrer, stirring at the rotating speed of 60r/min for 3 minutes, then stirring at the rotating speed of 360r/min for 6 minutes to form a premix, and placing the premix in a granulator to prepare particles A;
(b) taking 30 parts of PMMA block composition and 63 parts of polycarbonate A according to parts by weight, and putting the PMMA block composition, the polycarbonate A and the particles A prepared in the step (a) into a granulator to prepare particles B, wherein the first-stage temperature of the granulator is 225 ℃, the second-stage temperature is 235 ℃, the third-stage temperature is 245 ℃, the die temperature is 270 ℃, the plasticizing residence time is 2 minutes, and the absolute vacuum pressure is 0.08 Mpa;
(c) taking polycarbonate B, adding the particles B and the polycarbonate B into an extruder respectively, extruding the polycarbonate B and the particles B from a die head of the extruder after the polycarbonate B and the particles B are melted and plasticized to form a composite layer, wherein the composite layer comprises a layer A and a layer B, the layer A accounts for 8% of the total thickness of the composite layer, the layer A is formed by extruding the particles B after the particles B are melted and plasticized, the layer B is formed by extruding the polycarbonate B after the particles B are melted and plasticized, and the composite layer is formed by calendering and molding through a constant-temperature roller to form the PMMA alloy-PC composite plate.
Preferably, in the step (b), the PMMA block composition is prepared by the following method:
taking the following components in parts by weight:
65 parts of a monomer A, namely,
20 parts of a monomer B, namely,
1.5 parts of an initiator, namely,
45 parts of n-butyl alcohol,
3 parts of a chain transfer agent;
adding the n-butyl alcohol, the monomer A and the monomer B into a reaction kettle, stirring and mixing uniformly, then adding the initiator, heating the reaction kettle to 55 ℃, then heating the reaction kettle to 80 ℃ from 55 ℃ within 65 minutes, then keeping the temperature of 80 ℃ for reaction for 1 hour, then dropwise adding the chain transfer agent, carrying out polymerization reaction for 2 hours at the polymerization reaction temperature of 85 ℃, then cooling, discharging, evaporating the solvent and crushing to obtain the PMMA block composition.
Preferably, the constant temperature roll in the step (c) includes a first roll, a second roll and a third roll, and the composite layer is rolled by the first roll and then sequentially rolled and formed by the second roll and the third roll to form the PMMA alloy-PC composite plate.
Preferably, the first roll is a flexible roll, the second roll and the third roll are rigid rolls, and the surface temperature of the first roll, the second roll and the third roll is 140 ℃.
Preferably, the monomer A is any one of methyl methacrylate, butyl acrylate and methacrylic acid or a mixture of any two or more of methyl methacrylate, butyl acrylate and methacrylic acid.
Preferably, the monomer B is one of bismaleimide, N-phenylmaleimide and N-cyclohexylmaleimide or a mixture of any two or more of the bismaleimide, the N-phenylmaleimide and the N-cyclohexylmaleimide.
Preferably, the chain transfer agent is mercaptohydroxy malic acid, and the initiator is dibenzoyl peroxide.
Preferably, in the step (a), the antioxidant is any one or a mixture of two or more of 2, 6-di-tert-butyl-4-aminophenol, basf antioxidant Irganox B225, basf Irganox 1010 and tris 2.4-di-tert-butylphenyl phosphite.
Preferably, in the step (a), the UV stabilizer is any one of or a mixture of any two or more of a basf stabilizer Tinuvin326, Tinuvin944, 2, 4, 6-tris 2' n-butoxyphenyl-1, 3, 5-triazine, 4-benzoyloxy-2, 2, 6, 6-tetramethylpiperidine, tris 1, 2, 2, 6, 6-pentamethylpiperidinyl phosphite, resorcinol monobenzoate, and 2-hydroxy-4-n-octyloxybenzophenone.
Preferably, in the step (a), the particle size of the particle a is in the range of 3 mm.
The PMMA alloy-PC composite board prepared by the embodiment is tested, and the parameters are as follows:
the light transmittance was 92.2%, the haze was 0.1%, the warpage was 0.2%, the pencil hardness was H, and the heat shrinkage at 130 ℃ for 30 minutes was 0%.
Example 3
A manufacturing method of a PMMA alloy-PC composite board comprises the following preparation steps:
(a) taking 4 parts of antioxidant and 2 parts of UV stabilizer according to parts by weight, placing the antioxidant and the UV stabilizer in a stirrer, stirring at the rotating speed of 60r/min for 2 minutes, then stirring at the rotating speed of 360r/min for 5 minutes to form a premix, and placing the premix in a granulator to prepare particles A;
(b) taking 29 parts of PMMA block composition and 70 parts of polycarbonate A according to parts by weight, and putting the PMMA block composition, the polycarbonate A and the particles A prepared in the step (a) into a granulator to prepare particles B, wherein the first-stage temperature of the granulator is 214 ℃, the second-stage temperature of the granulator is 222 ℃, the third-stage temperature of the granulator is 232 ℃, the die temperature of the granulator is 260 ℃, the plasticizing residence time of the granulator is 1.5 minutes, and the absolute vacuum pressure of the granulator is 0.07 Mpa;
(c) taking polycarbonate B, adding the particles B and the polycarbonate B into an extruder respectively, extruding the polycarbonate B and the particles B from a die head of the extruder after the polycarbonate B and the particles B are melted and plasticized to form a composite layer, wherein the composite layer comprises a layer A and a layer B, the layer A accounts for 11% of the total thickness of the composite layer, the layer A is formed by extruding the particles B after the particles B are melted and plasticized, the layer B is formed by extruding the polycarbonate B after the particles B are melted and plasticized, and the composite layer is formed by calendering and molding through a constant-temperature roller to form the PMMA alloy-PC composite plate.
Preferably, in the step (b), the PMMA block composition is prepared by the following method:
taking the following components in parts by weight:
49 parts of a monomer A, namely,
16 parts of a monomer B, namely,
1.2 parts of an initiator, namely,
36 parts of n-butyl alcohol,
3 parts of a chain transfer agent;
adding the n-butyl alcohol, the monomer A and the monomer B into a reaction kettle, stirring and mixing uniformly, then adding the initiator, heating the reaction kettle to 55 ℃, then heating the reaction kettle to 80 ℃ from 55 ℃ within 60 minutes, then keeping the temperature of 80 ℃ for reaction for 1 hour, then dropwise adding the chain transfer agent, carrying out polymerization reaction for 2 hours at the polymerization reaction temperature of 84 ℃, then cooling, discharging, evaporating the solvent and crushing to obtain the PMMA block composition.
Preferably, the constant temperature roll in the step (c) includes a first roll, a second roll and a third roll, and the composite layer is rolled by the first roll and then sequentially rolled and formed by the second roll and the third roll to form the PMMA alloy-PC composite plate.
Preferably, the first roll is a flexible roll, the second roll and the third roll are rigid rolls, and the surface temperature of the first roll, the second roll and the third roll is 110 ℃.
Preferably, the monomer A is any one of methyl methacrylate, butyl acrylate and methacrylic acid or a mixture of any two or more of methyl methacrylate, butyl acrylate and methacrylic acid.
Preferably, the monomer B is one of bismaleimide, N-phenylmaleimide and N-cyclohexylmaleimide or a mixture of any two or more of the bismaleimide, the N-phenylmaleimide and the N-cyclohexylmaleimide.
Preferably, the chain transfer agent is mercaptohydroxy malic acid, and the initiator is dibenzoyl peroxide.
Preferably, in the step (a), the antioxidant is any one or a mixture of two or more of 2, 6-di-tert-butyl-4-aminophenol, basf antioxidant Irganox B225, basf Irganox 1010 and tris 2.4-di-tert-butylphenyl phosphite.
Preferably, in the step (a), the UV stabilizer is any one of or a mixture of any two or more of a basf stabilizer Tinuvin326, Tinuvin944, 2, 4, 6-tris 2' n-butoxyphenyl-1, 3, 5-triazine, 4-benzoyloxy-2, 2, 6, 6-tetramethylpiperidine, tris 1, 2, 2, 6, 6-pentamethylpiperidinyl phosphite, resorcinol monobenzoate, and 2-hydroxy-4-n-octyloxybenzophenone.
Preferably, in the step (a), the particle size of the particles a is in the range of 2 mm.
The PMMA alloy-PC composite board prepared by the embodiment is tested, and the parameters are as follows:
the light transmittance was 93.4%, the haze was 0%, the warpage was 0.1%, the pencil hardness was H, and the heat shrinkage at 130 ℃ for 30 minutes was 0%.
Example 4
A manufacturing method of a PMMA alloy-PC composite board comprises the following preparation steps:
(a) taking 3 parts of antioxidant and 1 part of UV stabilizer according to parts by weight, placing the antioxidant and the UV stabilizer in a stirrer, stirring at the rotating speed of 60r/min for 3 minutes, then stirring at the rotating speed of 360r/min for 6 minutes to form a premix, and placing the premix in a granulator to prepare particles A;
(b) taking 30 parts of PMMA block composition and 73 parts of polycarbonate A according to parts by weight, and putting the PMMA block composition, the polycarbonate A and the particles A prepared in the step (a) into a granulator to prepare particles B, wherein the first-stage temperature of the granulator is 216 ℃, the second-stage temperature of the granulator is 224 ℃, the third-stage temperature of the granulator is 234 ℃, the die temperature of the granulator is 270 ℃, the plasticizing residence time of the granulator is 1.5 minutes, and the absolute vacuum pressure of the granulator is 0.06 Mpa;
(c) taking polycarbonate B, adding the particles B and the polycarbonate B into an extruder respectively, extruding the polycarbonate B and the particles B from a die head of the extruder after the polycarbonate B and the particles B are melted and plasticized to form a composite layer, wherein the composite layer comprises a layer A and a layer B, the layer A accounts for 14% of the total thickness of the composite layer, the layer A is formed by extruding the particles B after the particles B are melted and plasticized, the layer B is formed by extruding the polycarbonate B after the particles B are melted and plasticized, and the composite layer is formed by calendering and molding through a constant-temperature roller to form the PMMA alloy-PC composite plate.
Preferably, in the step (b), the PMMA block composition is prepared by the following method:
taking the following components in parts by weight:
60 parts of a monomer A, namely,
17 parts of a monomer B, namely,
1.2 parts of an initiator, namely,
37 parts of n-butyl alcohol,
3 parts of a chain transfer agent;
adding the n-butyl alcohol, the monomer A and the monomer B into a reaction kettle, stirring and mixing uniformly, then adding the initiator, heating the reaction kettle to 55 ℃, then heating the reaction kettle to 80 ℃ from 55 ℃ within 57 minutes, then keeping the temperature of 80 ℃ for reaction for 1 hour, then dropwise adding the chain transfer agent, carrying out polymerization reaction for 2 hours at the polymerization reaction temperature of 84 ℃, then cooling, discharging, evaporating the solvent and crushing to obtain the PMMA block composition.
Preferably, the constant temperature roll in the step (c) includes a first roll, a second roll and a third roll, and the composite layer is rolled by the first roll and then sequentially rolled and formed by the second roll and the third roll to form the PMMA alloy-PC composite plate.
Preferably, the first roll is a flexible roll, the second roll and the third roll are rigid rolls, and the surface temperature of the first roll, the second roll and the third roll is 120 ℃.
Preferably, the monomer A is any one of methyl methacrylate, butyl acrylate and methacrylic acid or a mixture of any two or more of methyl methacrylate, butyl acrylate and methacrylic acid.
Preferably, the monomer B is one of bismaleimide, N-phenylmaleimide and N-cyclohexylmaleimide or a mixture of any two or more of the bismaleimide, the N-phenylmaleimide and the N-cyclohexylmaleimide.
Preferably, the chain transfer agent is mercaptohydroxy malic acid, and the initiator is dibenzoyl peroxide.
Preferably, in the step (a), the antioxidant is any one or a mixture of two or more of 2, 6-di-tert-butyl-4-aminophenol, basf antioxidant Irganox B225, basf Irganox 1010 and tris 2.4-di-tert-butylphenyl phosphite.
Preferably, in the step (a), the UV stabilizer is any one of or a mixture of any two or more of a basf stabilizer Tinuvin326, Tinuvin944, 2, 4, 6-tris 2' n-butoxyphenyl-1, 3, 5-triazine, 4-benzoyloxy-2, 2, 6, 6-tetramethylpiperidine, tris 1, 2, 2, 6, 6-pentamethylpiperidinyl phosphite, resorcinol monobenzoate, and 2-hydroxy-4-n-octyloxybenzophenone.
Preferably, in the step (a), the particle size of the particle a is in the range of 3 mm.
The PMMA alloy-PC composite board prepared by the embodiment is tested, and the parameters are as follows:
the light transmittance was 91.1%, the haze was 0.1%, the warpage was 0.2%, the pencil hardness was H, and the heat shrinkage at 130 ℃ for 30 minutes was 0.1%.
Example 5
A manufacturing method of a PMMA alloy-PC composite board comprises the following preparation steps:
(a) taking 4 parts of antioxidant and 2 parts of UV stabilizer according to parts by weight, placing the antioxidant and the UV stabilizer in a stirrer, stirring at the rotating speed of 60r/min for 2 minutes, then stirring at the rotating speed of 360r/min for 6 minutes to form a premix, and placing the premix in a granulator to prepare particles A;
(b) taking 29 parts of PMMA block composition and 75 parts of polycarbonate A according to parts by weight, and putting the PMMA block composition, the polycarbonate A and the particles A prepared in the step (a) into a granulator to prepare particles B, wherein the first-stage temperature of the granulator is 218 ℃, the second-stage temperature of the granulator is 226 ℃, the third-stage temperature of the granulator is 236 ℃, the die temperature of the granulator is 280 ℃, the plasticizing residence time of the granulator is 1 minute, and the absolute vacuum pressure of the granulator is 0.08 Mpa;
(c) taking polycarbonate B, adding the particles B and the polycarbonate B into an extruder respectively, extruding the polycarbonate B and the particles B from a die head of the extruder after the polycarbonate B and the particles B are melted and plasticized to form a composite layer, wherein the composite layer comprises a layer A and a layer B, the layer A accounts for 17% of the total thickness of the composite layer, the layer A is formed by extruding the particles B after the particles B are melted and plasticized, the layer B is formed by extruding the polycarbonate B after the particles B are melted and plasticized, and the composite layer is formed by calendering and molding through a constant-temperature roller to form the PMMA alloy-PC composite plate.
Preferably, in the step (b), the PMMA block composition is prepared by the following method:
taking the following components in parts by weight:
60 parts of a monomer A, namely,
18 parts of a monomer B, namely,
1.4 parts of an initiator, namely,
39 parts of n-butyl alcohol,
3 parts of a chain transfer agent;
adding the n-butyl alcohol, the monomer A and the monomer B into a reaction kettle, stirring and mixing uniformly, then adding the initiator, heating the reaction kettle to 55 ℃, then heating the reaction kettle to 80 ℃ from 55 ℃ within 62 minutes, then keeping the temperature of 80 ℃ for reaction for 1 hour, then dropwise adding the chain transfer agent, carrying out polymerization reaction for 2 hours at the polymerization reaction temperature of 83 ℃, then cooling, discharging, evaporating the solvent and crushing to obtain the PMMA block composition.
Preferably, the constant temperature roll in the step (c) includes a first roll, a second roll and a third roll, and the composite layer is rolled by the first roll and then sequentially rolled and formed by the second roll and the third roll to form the PMMA alloy-PC composite plate.
Preferably, the first roll is a flexible roll, the second roll and the third roll are rigid rolls, and the surface temperature of the first roll, the second roll and the third roll is 130 ℃.
Preferably, the monomer A is any one of methyl methacrylate, butyl acrylate and methacrylic acid or a mixture of any two or more of methyl methacrylate, butyl acrylate and methacrylic acid.
Preferably, the monomer B is one of bismaleimide, N-phenylmaleimide and N-cyclohexylmaleimide or a mixture of any two or more of the bismaleimide, the N-phenylmaleimide and the N-cyclohexylmaleimide.
Preferably, the chain transfer agent is mercaptohydroxy malic acid, and the initiator is dibenzoyl peroxide.
Preferably, in the step (a), the antioxidant is any one or a mixture of two or more of 2, 6-di-tert-butyl-4-aminophenol, basf antioxidant Irganox B225, basf Irganox 1010 and tris 2.4-di-tert-butylphenyl phosphite.
Preferably, in the step (a), the UV stabilizer is any one of or a mixture of any two or more of a basf stabilizer Tinuvin326, Tinuvin944, 2, 4, 6-tris 2' n-butoxyphenyl-1, 3, 5-triazine, 4-benzoyloxy-2, 2, 6, 6-tetramethylpiperidine, tris 1, 2, 2, 6, 6-pentamethylpiperidinyl phosphite, resorcinol monobenzoate, and 2-hydroxy-4-n-octyloxybenzophenone.
Preferably, in the step (a), the particle size of the particles a is in the range of 1 mm.
The PMMA alloy-PC composite board prepared by the embodiment is tested, and the parameters are as follows:
the light transmittance was 93.4%, the haze was 0%, the warpage was 0.1%, the pencil hardness was H, and the heat shrinkage at 130 ℃ for 30 minutes was 0.2%.
Example 6
A manufacturing method of a PMMA alloy-PC composite board comprises the following preparation steps:
(a) taking 4 parts of antioxidant and 2 parts of UV stabilizer according to parts by weight, placing the antioxidant and the UV stabilizer in a stirrer, stirring at the rotating speed of 60r/min for 3 minutes, then stirring at the rotating speed of 360r/min for 5 minutes to form a premix, and placing the premix in a granulator to prepare particles A;
(b) taking 29 parts of PMMA block composition and 79 parts of polycarbonate A according to parts by weight, and putting the PMMA block composition, the polycarbonate A and the particles A prepared in the step (a) into a granulator to prepare particles B, wherein the first-stage temperature of the granulator is 220 ℃, the second-stage temperature of the granulator is 230 ℃, the third-stage temperature of the granulator is 240 ℃, the die temperature of the granulator is 290 ℃, the plasticizing residence time of the granulator is 2 minutes, and the absolute vacuum pressure of the granulator is 0.06 Mpa;
(c) taking polycarbonate B, adding the particles B and the polycarbonate B into an extruder respectively, extruding the polycarbonate B and the particles B from a die head of the extruder after the polycarbonate B and the particles B are melted and plasticized to form a composite layer, wherein the composite layer comprises a layer A and a layer B, the layer A accounts for 5% of the total thickness of the composite layer, the layer A is formed by extruding the particles B after the particles B are melted and plasticized, the layer B is formed by extruding the polycarbonate B after the particles B are melted and plasticized, and the composite layer is formed by calendering and molding through a constant-temperature roller to form the PMMA alloy-PC composite plate.
Preferably, in the step (b), the PMMA block composition is prepared by the following method:
taking the following components in parts by weight:
62 parts of a monomer A, namely,
18 parts of a monomer B, namely,
1.4 parts of an initiator, namely,
42 parts of n-butanol, namely,
3 parts of a chain transfer agent;
adding the n-butyl alcohol, the monomer A and the monomer B into a reaction kettle, stirring and mixing uniformly, then adding the initiator, heating the reaction kettle to 55 ℃, then heating the reaction kettle to 80 ℃ from 55 ℃ within 62 minutes, then keeping the temperature of 80 ℃ for reaction for 1 hour, then dropwise adding the chain transfer agent, carrying out polymerization reaction for 2 hours at the polymerization reaction temperature of 84 ℃, then cooling, discharging, evaporating the solvent and crushing to obtain the PMMA block composition.
Preferably, the constant temperature roll in the step (c) includes a first roll, a second roll and a third roll, and the composite layer is rolled by the first roll and then sequentially rolled and formed by the second roll and the third roll to form the PMMA alloy-PC composite plate.
Preferably, the first roll is a flexible roll, the second roll and the third roll are rigid rolls, and the surface temperature of the first roll, the second roll and the third roll is 140 ℃.
Preferably, the monomer A is any one of methyl methacrylate, butyl acrylate and methacrylic acid or a mixture of any two or more of methyl methacrylate, butyl acrylate and methacrylic acid.
Preferably, the monomer B is one of bismaleimide, N-phenylmaleimide and N-cyclohexylmaleimide or a mixture of any two or more of the bismaleimide, the N-phenylmaleimide and the N-cyclohexylmaleimide.
Preferably, the chain transfer agent is mercaptohydroxy malic acid, and the initiator is dibenzoyl peroxide.
Preferably, in the step (a), the antioxidant is any one or a mixture of two or more of 2, 6-di-tert-butyl-4-aminophenol, basf antioxidant Irganox B225, basf Irganox 1010 and tris 2.4-di-tert-butylphenyl phosphite.
Preferably, in the step (a), the UV stabilizer is any one of or a mixture of any two or more of a basf stabilizer Tinuvin326, Tinuvin944, 2, 4, 6-tris 2' n-butoxyphenyl-1, 3, 5-triazine, 4-benzoyloxy-2, 2, 6, 6-tetramethylpiperidine, tris 1, 2, 2, 6, 6-pentamethylpiperidinyl phosphite, resorcinol monobenzoate, and 2-hydroxy-4-n-octyloxybenzophenone.
Preferably, in the step (a), the particle size of the particles a is in the range of 1 mm.
The PMMA alloy-PC composite board prepared by the embodiment is tested, and the parameters are as follows:
the light transmittance was 93.2%, the haze was 0%, the warpage was 0.1%, the pencil hardness was H, and the heat shrinkage at 130 ℃ for 30 minutes was 0%.
Example 7
A manufacturing method of a PMMA alloy-PC composite board comprises the following preparation steps:
(a) taking 4 parts of antioxidant and 2 parts of UV stabilizer according to parts by weight, placing the antioxidant and the UV stabilizer in a stirrer, stirring at the rotating speed of 60r/min for 2 minutes, then stirring at the rotating speed of 360r/min for 6 minutes to form a premix, and placing the premix in a granulator to prepare particles A;
(b) taking 29 parts of PMMA block composition and 82 parts of polycarbonate A according to parts by weight, and putting the PMMA block composition, the polycarbonate A and the particles A prepared in the step (a) into a granulator to prepare particles B, wherein the first-stage temperature of the granulator is 222 ℃, the second-stage temperature of the granulator is 230 ℃, the third-stage temperature of the granulator is 240 ℃, the die temperature of the granulator is 270 ℃, the plasticizing residence time of the granulator is 1 minute, and the absolute vacuum pressure of the granulator is 0.07 Mpa;
(c) taking polycarbonate B, adding the particles B and the polycarbonate B into an extruder respectively, extruding the polycarbonate B and the particles B from a die head of the extruder after the polycarbonate B and the particles B are melted and plasticized to form a composite layer, wherein the composite layer comprises a layer A and a layer B, the layer A accounts for 8% of the total thickness of the composite layer, the layer A is formed by extruding the particles B after the particles B are melted and plasticized, the layer B is formed by extruding the polycarbonate B after the particles B are melted and plasticized, and the composite layer is formed by calendering and molding through a constant-temperature roller to form the PMMA alloy-PC composite plate.
Preferably, in the step (b), the PMMA block composition is prepared by the following method:
taking the following components in parts by weight:
63 parts of a monomer A, namely,
19 parts of a monomer B, namely,
1.4 parts of an initiator, namely,
43 parts of n-butyl alcohol,
3 parts of a chain transfer agent;
adding the n-butyl alcohol, the monomer A and the monomer B into a reaction kettle, stirring and mixing uniformly, then adding the initiator, heating the reaction kettle to 55 ℃, then heating the reaction kettle to 80 ℃ from 55 ℃ within 62 minutes, then keeping the temperature of 80 ℃ for reaction for 1 hour, then dropwise adding the chain transfer agent, carrying out polymerization reaction for 2 hours at the polymerization reaction temperature of 84 ℃, then cooling, discharging, evaporating the solvent and crushing to obtain the PMMA block composition.
Preferably, the constant temperature roll in the step (c) includes a first roll, a second roll and a third roll, and the composite layer is rolled by the first roll and then sequentially rolled and formed by the second roll and the third roll to form the PMMA alloy-PC composite plate.
Preferably, the first roll is a flexible roll, the second roll and the third roll are rigid rolls, and the surface temperature of the first roll, the second roll and the third roll is 100 ℃.
Preferably, the monomer A is any one of methyl methacrylate, butyl acrylate and methacrylic acid or a mixture of any two or more of methyl methacrylate, butyl acrylate and methacrylic acid.
Preferably, the monomer B is one of bismaleimide, N-phenylmaleimide and N-cyclohexylmaleimide or a mixture of any two or more of the bismaleimide, the N-phenylmaleimide and the N-cyclohexylmaleimide.
Preferably, the chain transfer agent is mercaptohydroxy malic acid, and the initiator is dibenzoyl peroxide.
Preferably, in the step (a), the antioxidant is any one or a mixture of two or more of 2, 6-di-tert-butyl-4-aminophenol, basf antioxidant Irganox B225, basf Irganox 1010 and tris 2.4-di-tert-butylphenyl phosphite.
Preferably, in the step (a), the UV stabilizer is any one of or a mixture of any two or more of a basf stabilizer Tinuvin326, Tinuvin944, 2, 4, 6-tris 2' n-butoxyphenyl-1, 3, 5-triazine, 4-benzoyloxy-2, 2, 6, 6-tetramethylpiperidine, tris 1, 2, 2, 6, 6-pentamethylpiperidinyl phosphite, resorcinol monobenzoate, and 2-hydroxy-4-n-octyloxybenzophenone.
Preferably, in the step (a), the particle size of the particles a is in the range of 2 mm.
The PMMA alloy-PC composite board prepared by the embodiment is tested, and the parameters are as follows:
the light transmittance was 93.3%, the haze was 0%, the warpage was 0%, the pencil hardness was H, and the heat shrinkage at 130 ℃ for 30 minutes was 0%.
Example 8
A manufacturing method of a PMMA alloy-PC composite board comprises the following preparation steps:
(a) taking 4 parts of antioxidant and 2 parts of UV stabilizer according to parts by weight, placing the antioxidant and the UV stabilizer in a stirrer, stirring at the rotating speed of 60r/min for 2 minutes, then stirring at the rotating speed of 360r/min for 5 minutes to form a premix, and placing the premix in a granulator to prepare particles A;
(b) taking 29 parts of PMMA block composition and 85 parts of polycarbonate A according to parts by weight, and putting the PMMA block composition, the polycarbonate A and the particles A prepared in the step (a) into a granulator to prepare particles B, wherein the first-stage temperature of the granulator is 223 ℃, the second-stage temperature is 232 ℃, the third-stage temperature is 242 ℃, the die temperature is 250 ℃, the plasticizing residence time is 2 minutes, and the absolute vacuum pressure is 0.07 Mpa;
(c) taking polycarbonate B, adding the particles B and the polycarbonate B into an extruder respectively, extruding the polycarbonate B and the particles B from a die head of the extruder after the polycarbonate B and the particles B are melted and plasticized to form a composite layer, wherein the composite layer comprises a layer A and a layer B, the layer A accounts for 14% of the total thickness of the composite layer, the layer A is formed by extruding the particles B after the particles B are melted and plasticized, the layer B is formed by extruding the polycarbonate B after the particles B are melted and plasticized, and the composite layer is formed by calendering and molding through a constant-temperature roller to form the PMMA alloy-PC composite plate.
Preferably, in the step (b), the PMMA block composition is prepared by the following method:
taking the following components in parts by weight:
64 parts of a monomer A, namely a monomer A,
19 parts of a monomer B, namely,
1 part of an initiator, namely,
44 parts of n-butanol, namely,
3 parts of a chain transfer agent;
adding the n-butyl alcohol, the monomer A and the monomer B into a reaction kettle, stirring and mixing uniformly, then adding the initiator, heating the reaction kettle to 55 ℃, then heating the reaction kettle to 80 ℃ from 55 ℃ within 60 minutes, then keeping the temperature of 80 ℃ for reaction for 1 hour, then dropwise adding the chain transfer agent, carrying out polymerization reaction for 2 hours at the polymerization reaction temperature of 84 ℃, then cooling, discharging, evaporating the solvent and crushing to obtain the PMMA block composition.
Preferably, the constant temperature roll in the step (c) includes a first roll, a second roll and a third roll, and the composite layer is rolled by the first roll and then sequentially rolled and formed by the second roll and the third roll to form the PMMA alloy-PC composite plate.
Preferably, the first roll is a flexible roll, the second roll and the third roll are rigid rolls, and the surface temperature of the first roll, the second roll and the third roll is 100 ℃.
Preferably, the monomer A is any one of methyl methacrylate, butyl acrylate and methacrylic acid or a mixture of any two or more of methyl methacrylate, butyl acrylate and methacrylic acid.
Preferably, the monomer B is one of bismaleimide, N-phenylmaleimide and N-cyclohexylmaleimide or a mixture of any two or more of the bismaleimide, the N-phenylmaleimide and the N-cyclohexylmaleimide.
Preferably, the chain transfer agent is mercaptohydroxy malic acid, and the initiator is dibenzoyl peroxide.
Preferably, in the step (a), the antioxidant is any one or a mixture of two or more of 2, 6-di-tert-butyl-4-aminophenol, basf antioxidant Irganox B225, basf Irganox 1010 and tris 2.4-di-tert-butylphenyl phosphite.
Preferably, in the step (a), the UV stabilizer is any one of or a mixture of any two or more of a basf stabilizer Tinuvin326, Tinuvin944, 2, 4, 6-tris 2' n-butoxyphenyl-1, 3, 5-triazine, 4-benzoyloxy-2, 2, 6, 6-tetramethylpiperidine, tris 1, 2, 2, 6, 6-pentamethylpiperidinyl phosphite, resorcinol monobenzoate, and 2-hydroxy-4-n-octyloxybenzophenone.
Preferably, in the step (a), the particle size of the particles a is in the range of 2 mm.
The PMMA alloy-PC composite board prepared by the embodiment is tested, and the parameters are as follows:
the light transmittance was 93.2%, the haze was 0%, the warpage was 0.1%, the pencil hardness was H, and the heat shrinkage at 130 ℃ for 30 minutes was 0.1%.
Example 9
A manufacturing method of a PMMA alloy-PC composite board comprises the following preparation steps:
(a) taking 4 parts of antioxidant and 2 parts of UV stabilizer according to parts by weight, placing the antioxidant and the UV stabilizer in a stirrer, stirring at the rotating speed of 60r/min for 3 minutes, then stirring at the rotating speed of 360r/min for 6 minutes to form a premix, and placing the premix in a granulator to prepare particles A;
(b) taking 29 parts of PMMA block composition and 87 parts of polycarbonate A according to parts by weight, and putting the PMMA block composition, the polycarbonate A and the particles A prepared in the step (a) into a granulator to prepare particles B, wherein the first-stage temperature of the granulator is 224 ℃, the second-stage temperature of the granulator is 234 ℃, the third-stage temperature of the granulator is 244 ℃, the die temperature of the granulator is 280 ℃, the plasticizing residence time of the granulator is 2 minutes, and the absolute vacuum pressure of the granulator is 0.08 Mpa;
(c) taking polycarbonate B, adding the particles B and the polycarbonate B into an extruder respectively, extruding the polycarbonate B and the particles B from a die head of the extruder after the polycarbonate B and the particles B are melted and plasticized to form a composite layer, wherein the composite layer comprises a layer A and a layer B, the layer A accounts for 20% of the total thickness of the composite layer, the layer A is formed by extruding the particles B after the particles B are melted and plasticized, the layer B is formed by extruding the polycarbonate B after the particles B are melted and plasticized, and the composite layer is formed by calendering and molding through a constant-temperature roller to form the PMMA alloy-PC composite plate.
Preferably, in the step (b), the PMMA block composition is prepared by the following method:
taking the following components in parts by weight:
65 parts of a monomer A, namely,
20 parts of a monomer B, namely,
1.5 parts of an initiator, namely,
45 parts of n-butyl alcohol,
3 parts of a chain transfer agent;
adding the n-butyl alcohol, the monomer A and the monomer B into a reaction kettle, stirring and mixing uniformly, then adding the initiator, heating the reaction kettle to 55 ℃, then heating the reaction kettle to 80 ℃ from 55 ℃ within 65 minutes, then keeping the temperature of 80 ℃ for reaction for 1 hour, then dropwise adding the chain transfer agent, carrying out polymerization reaction for 2 hours at the polymerization reaction temperature of 85 ℃, then cooling, discharging, evaporating the solvent and crushing to obtain the PMMA block composition.
Preferably, the constant temperature roll in the step (c) includes a first roll, a second roll and a third roll, and the composite layer is rolled by the first roll and then sequentially rolled and formed by the second roll and the third roll to form the PMMA alloy-PC composite plate.
Preferably, the first roll is a flexible roll, the second roll and the third roll are rigid rolls, and the surface temperature of the first roll, the second roll and the third roll is 140 ℃.
Preferably, the monomer A is any one of methyl methacrylate, butyl acrylate and methacrylic acid or a mixture of any two or more of methyl methacrylate, butyl acrylate and methacrylic acid.
Preferably, the monomer B is one of bismaleimide, N-phenylmaleimide and N-cyclohexylmaleimide or a mixture of any two or more of the bismaleimide, the N-phenylmaleimide and the N-cyclohexylmaleimide.
Preferably, the chain transfer agent is mercaptohydroxy malic acid, and the initiator is dibenzoyl peroxide.
Preferably, in the step (a), the antioxidant is any one or a mixture of two or more of 2, 6-di-tert-butyl-4-aminophenol, basf antioxidant Irganox B225, basf Irganox 1010 and tris 2.4-di-tert-butylphenyl phosphite.
Preferably, in the step (a), the UV stabilizer is any one of or a mixture of any two or more of a basf stabilizer Tinuvin326, Tinuvin944, 2, 4, 6-tris 2' n-butoxyphenyl-1, 3, 5-triazine, 4-benzoyloxy-2, 2, 6, 6-tetramethylpiperidine, tris 1, 2, 2, 6, 6-pentamethylpiperidinyl phosphite, resorcinol monobenzoate, and 2-hydroxy-4-n-octyloxybenzophenone.
Preferably, in the step (a), the particle size of the particle a is in the range of 3 mm.
The PMMA alloy-PC composite board prepared by the embodiment is tested, and the parameters are as follows:
the light transmittance was 93.1%, the haze was 0%, the warpage was 0.2%, the pencil hardness was H, and the heat shrinkage at 130 ℃ for 30 minutes was 0.1%.
In summary, the above-mentioned embodiments are only preferred embodiments of the present invention, and all equivalent changes and modifications made within the scope of the claims of the present invention should be covered by the present invention.
Claims (1)
1. A method for manufacturing a PMMA alloy-PC composite board is characterized by comprising the following steps: the preparation steps are as follows:
(a) taking 3-4 parts of antioxidant and 1-2 parts of UV stabilizer by weight, placing the antioxidant and the UV stabilizer in a stirrer, stirring at a rotating speed of 60r/min for 2-3 minutes, then stirring at a rotating speed of 360r/min for 5-6 minutes to form a premix, placing the premix in a granulator to prepare particles A, wherein the particle size range of the particles A is 1-3 mm, the antioxidant is any one or a mixture of more than two of 2, 6-di-tert-butyl-4-aminophenol, Pasteur antioxidant Irganox B225, Pasteur Irganox 1010 and tris (2.4-di-tert-butylphenyl) phosphite, the UV stabilizer is a Tinuvin326, Tinuvin944, 2, 4, 6-tris (2' n-butoxyphenyl) -1, 3, 5-triazine and 4-benzoyloxy-2, 2, 6, 6-tetramethyl piperidine, tris (1, 2, 2, 6, 6-pentamethyl-piperidyl) phosphite, resorcinol monobenzoate and 2-hydroxy-4-n-octoxy benzophenone or a mixture of any two or more of the above;
(b) taking 29-30 parts by weight of PMMA block composition and 63-87 parts by weight of polycarbonate A, and putting the PMMA block composition, the polycarbonate A and the particles A prepared in the step (a) into a granulator to prepare particles B, wherein the temperature of a first section of the granulator is 212-225 ℃, the temperature of a second section of the granulator is 220-235 ℃, the temperature of a third section of the granulator is 230-245 ℃, the temperature of a neck mold is 250-290 ℃, the plasticizing residence time is 1-2 minutes, and the absolute vacuum pressure is 0.06-0.08 MPa;
(c) adding polycarbonate B into an extruder respectively, extruding the polycarbonate B and the particles B from a die head of the extruder after the polycarbonate B and the particles B are melted and plasticized to form a composite layer, wherein the composite layer comprises a layer A and a layer B, the layer A accounts for 5-20% of the total thickness of the composite layer, the layer A is formed by extruding the particles B after the particles B are melted and plasticized, the layer B is formed by extruding the polycarbonate B after the polycarbonate B is melted and plasticized, and the composite layer is calendered and molded by a constant temperature roller to form a PMMA alloy-PC composite plate, wherein the constant temperature roller comprises a first roller, a second roller and a third roller, the composite layer is rolled by the first roller and then is sequentially rolled by the second roller and the third roller to form the PMMA alloy-PC composite plate, the first roller is a flexible roller, and the second roller and the third roller are steel rollers, the surface temperature of the first roller, the second roller and the third roller is 100-140 ℃;
in the step (b), the PMMA block composition is prepared as follows: taking the following components in parts by weight:
45-65 parts of a monomer A,
15-20 parts of a monomer B,
1 to 1.5 parts of an initiator,
35-45 parts of n-butyl alcohol,
3 parts of a chain transfer agent;
adding the n-butyl alcohol, the monomer A and the monomer B into a reaction kettle, stirring and mixing uniformly, then adding the initiator, heating the reaction kettle to 55 ℃, then heating the reaction kettle to 80 ℃ from 55 ℃ within 55-65 minutes, then keeping the temperature of 80 ℃ for reaction for 1 hour, then dropwise adding the chain transfer agent, carrying out polymerization reaction for 2 hours at the polymerization reaction temperature of 83-85 ℃, then cooling, discharging, evaporating the solvent and crushing to obtain the PMMA block composition;
the monomer A is methyl methacrylate, the monomer B is any one or a mixture of more than two of bismaleimide, N-phenylmaleimide and N-cyclohexylmaleimide, the chain transfer agent is mercaptohydroxy malic acid, and the initiator is dibenzoyl peroxide.
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