A temperature-resistant, flame-retardant, and corrosion-resistant building composite material, a preparation method and application thereof

Abstract

The application discloses a kind of temperature-resistant, flame-retardant, anticorrosive composite materials for building and its preparation method and application, belong to polycarbonate building material technical field.The composite material includes: polycarbonate 60-80 parts, dispersing agent 8-10 parts, epoxidized silicone rubber 10-20 parts, benzotriazole 1-5 parts, flame retardant 1-5 parts, compatible auxiliary agent 3-5 parts, antioxidant 0.3-0.5 parts, light stabilizer 0.2-0.5 parts, anti-dripping agent 0.15-0.3 parts, catalyst 0.2-0.4 parts by weight.The composite material takes polycarbonate as base material, by the addition of epoxidized silicone rubber and benzotriazole can significantly improve the flame retardancy and corrosion resistance of composite material, and the temperature resistance of material is not obviously decreased, prolongs the service life of material.

Description

TECHNICAL FIELD

[0001] The application relates to a temperature-resistant, flame-retardant and corrosion-resistant composite material for buildings and a preparation method and application thereof, and belongs to the technical field of polycarbonate building materials. BACKGROUND

[0002] The polycarbonate building template material is a new type of building template material prepared by adding antioxidants, ultraviolet absorbers and other functional additives into polycarbonate (PC) resin as a main raw material through extrusion or injection molding process. The polycarbonate has good comprehensive performance, and the template prepared therefrom has the advantages of light weight, high strength, smooth surface, dimensional stability and reusability, and can effectively reduce the construction cost and improve the construction efficiency compared with traditional wood template and steel template.

[0003] In actual building construction, the polycarbonate building template material has high requirements for temperature resistance, flame retardance and corrosion resistance. In terms of temperature resistance, the building construction environment temperature changes greatly, and the polycarbonate template needs to maintain physical performance stability in a high-temperature environment above 60 DEG C without deformation and softening in high-temperature summer, and still needs to have good toughness at-20 DEG C or even lower temperature in winter to avoid brittle fracture. In terms of flame retardance, there are fire hazards such as open fire operation in the construction site, and the polycarbonate building template needs to reach a certain flame retardance grade to reduce the spreading speed and harm degree in case of fire. The requirement for corrosion resistance is derived from the fact that the template will contact alkaline substances in cement slurry, rainwater and various chemical additives in the construction process, and the polycarbonate template needs to have good chemical stability to prevent corrosion, thereby prolonging the service life and ensuring the construction quality.

[0004] Patent CN103102669A discloses a heat-resistant low-smoke halogen-free flame-retardant PC / ABS alloy material, which can improve the temperature resistance and flame retardance of the alloy material by adding halogen-free flame retardants and heat-resistant modifiers in the PC / ABS base material, and can reduce the smoke density. Patent CN117402477A discloses a short-molding-cycle flame-retardant polycarbonate material, which can improve the flame retardance and rigidity of the material at high temperature by adding modified silicone rubber and sulfonate flame retardants, so as to facilitate demolding. However, the above-mentioned patents do not pay attention to the corrosion resistance of the polycarbonate material, and the alloy material will be corroded when used in building construction, which reduces the service life of the alloy material, and the addition of modified silicone rubber will reduce the heat distortion temperature of the polycarbonate, thereby reducing the temperature resistance of the material.

[0005] In order to endow the polycarbonate material with corrosion resistance, researchers usually think of adding corrosion resistance additives to the material, but the applicant finds that if the amount of corrosion resistance additives is small, it is difficult to achieve ideal corrosion resistance, and if the amount of corrosion resistance additives is large, there are three problems: first, the raw materials are not uniformly dispersed, resulting in poor uniformity of various properties of the material; second, the proportion of heat resistance additives and flame retardants is reduced, thereby reducing the heat resistance and flame retardance; third, the addition of too many additives reduces the proportion of polycarbonate base material, which not only affects the mechanical properties of the material, but also causes the additives to migrate outward during long-term use, making it difficult to maintain the initial state and thus reducing the various properties of the material and shortening the service life of the material. SUMMARY

[0006] In order to solve the above problems, a heat-resistant, flame-retardant and corrosion-resistant building composite material is provided, which uses polycarbonate as the base material, and the addition of epoxidized silicone rubber and benzotriazole can significantly improve the flame retardance and corrosion resistance of the composite material, and the heat resistance of the material is not significantly reduced, thereby prolonging the service life of the material.

[0007] According to a first aspect of the present application, a heat-resistant, flame-retardant and corrosion-resistant building composite material is provided, which comprises, by weight fraction:

[0008] Polycarbonate 60-80 parts, dispersing agent 8-10 parts, epoxidized silicone rubber 10-20 parts, benzotriazole 1-5 parts, flame retardant 1-5 parts, compatibility aid 3-5 parts, antioxidant 0.3-0.5 parts, light stabilizer 0.2-0.5 parts, anti-dripping agent 0.15-0.3 parts, catalyst 0.2-0.4 parts.

[0009] The benzotriazole in the present application serves as a corrosion inhibitor, which can improve the corrosion resistance of polycarbonate, but relying solely on this substance for corrosion resistance still has the problems described in the background art. Therefore, in order to solve this problem, the present application adds epoxidized silicone rubber to a small amount of base flame retardant and corrosion inhibitor, which can significantly improve the heat resistance, flame retardance and corrosion resistance of the polycarbonate material. However, epoxidized silicone rubber and polycarbonate have compatibility problems, so the present application additionally adds a compatibility aid to improve the compatibility of the two, thereby obtaining a composite material with good compatibility and more uniform properties.

[0010] Optionally, the epoxidized silicone rubber is epoxidized phenyl silicone rubber.

[0011] The addition of epoxidized phenyl silicone rubber in the present application has the following advantages:

[0012] 1. Does not significantly reduce the heat distortion temperature:

[0013] Due to the fact that the main chain of the epoxy-phenyl silicone rubber contains siloxane bonds, the side chain contains epoxy groups and phenyl groups, the bond energy of the main chain siloxane bonds is higher than that of C-C bonds, and the phenyl groups contained in the side chain endow the molecular chain with high rigidity and cohesive energy, which can effectively inhibit the movement of the molecular chain at high temperature, so the addition of the epoxy-phenyl silicone rubber will not significantly reduce the heat distortion temperature of the material, so that the material can maintain good heat distortion resistance.

[0014] 2. Improve the flame retardancy:

[0015] During the initial stage of combustion of the epoxy-phenyl silicone rubber, the silicon element will migrate to the surface of the material, react with oxygen in the air to form silicon dioxide (SiO2), and form a ceramic-like carbon layer containing silicon-carbon together with the phenyl oxidation product. This carbon layer has a dense structure and good heat and oxygen insulation performance, which can effectively prevent heat transfer to the matrix, reduce the release of flammable gas, and inhibit the combustion reaction. In addition, after the epoxy-phenyl silicone rubber is blended with polycarbonate, the thermal decomposition path of polycarbonate is changed, resulting in more carbon residues, which further enhances the flame retardant effect.

[0016] 3. Improve the corrosion resistance:

[0017] The siloxane bonds of the epoxy-phenyl silicone rubber have strong chemical stability and are not easily reacted with acid, alkali, oxygen, moisture and other corrosive media. When blended with polycarbonate, a continuous and dense silicone rubber film layer is formed on the surface and inside the material. This film layer has low surface energy and hydrophobicity, which can effectively prevent water, corrosive gases and chemical reagents from penetrating into the polycarbonate, acting as a physical barrier. In addition, the phenyl groups in the side chain have good chemical inertness and can resist the corrosion of most chemicals, thereby improving the corrosion resistance of polycarbonate.

[0018] 4. Promote the dispersion of benzotriazole

[0019] The amino group in benzotriazole can react with the epoxy groups in the epoxy-phenyl silicone rubber, so the addition of the epoxy-phenyl silicone rubber can promote the dispersion of benzotriazole and further improve the performance uniformity of the material.

[0020] Optionally, the epoxy-phenyl silicone rubber has a vinyl content of 20-25% and an epoxy content of 15-20%.

[0021] The above-mentioned vinyl content and epoxy content can make the temperature resistance, flame retardancy, corrosion resistance and mechanical properties of the composite material optimal. If the vinyl content is too high, it will not significantly affect the flame retardancy, but will cause the temperature resistance and corrosion resistance to decrease. If the content of phenyl is too high, it will increase the brittleness of the composite material and reduce the mechanical properties of the material at high temperature.

[0022] Optionally, the preparation method of the epoxy silicone rubber refers to the patent CN110358091B.

[0023] Optionally, the compatibilizing agent is obtained by copolymerization of acrylamide, styrene and propenyltrichlorosilane in a weight ratio of (3-5):(3-4):1.

[0024] The compatibilizing agent of the present application is obtained by copolymerization of the above three substances, which can effectively improve the compatibility of polycarbonate and epoxy silicone rubber, thereby obtaining a composite material with more excellent comprehensive performance. In addition, the compatibilizing agent contains amide groups, which can react with epoxy silicone rubber to form a crosslinked network. In a high temperature environment, this network structure can limit the movement of polycarbonate molecular chains, increase the glass transition temperature and heat distortion temperature of polycarbonate, and make polycarbonate maintain good mechanical properties and dimensional stability at higher temperatures; at the same time, it can improve the overall density of the material, further enhance the flame retardation and corrosion resistance.

[0025] Optionally, the propenyltrichlorosilane is at least one selected from allyldimethylsilane, propenyltrichlorosilane, allyl(chloromethyl)dimethylsilane and trimethylallyloxy silane.

[0026] The raw materials of the above-mentioned propenyltrichlorosilane are easy to obtain, which is beneficial to the industrial production of the compatibilizing agent.

[0027] Preferably, the propenyltrichlorosilane is selected from propenyltrichlorosilane or allyl(chloromethyl)dimethylsilane. The above two kinds of propenyltrichlorosilane contain halogen atoms, which can further improve the flame retardation of the composite material and improve the compatibility with the flame retardant, so that the flame retardant can be uniformly dispersed in the composite material.

[0028] Optionally, the preparation method of the compatibilizing agent is as follows:

[0029] S1: 1 / 3 acrylamide and 1 / 2 styrene are added to a solvent, followed by adding an initiator and sodium dodecylbenzenesulfonate, and reacting at 60-80°C for 1-3h to obtain a prepolymer;

[0030] S2: the remaining acrylamide, styrene and propenyltrichlorosilane are added to the prepolymer, and the reaction is continued at the temperature for 3-5h, and then the temperature is raised to 95°C for 0.5-1h, and then the product is discharged, filtered, washed and dried to obtain the compatibilizing agent.

[0031] The propenyltrichlorosilane has low free radical activity under the action of a free radical initiator, so the copolymerization of this substance is limited and cannot effectively form a high molecular weight polymer. The pre-polymerization in step S1 in the present preparation method can make the prepolymer initiate the reaction of propenyltrichlorosilane, improve the reaction efficiency of the copolymer, and obtain an ideal compatibilizing agent.

[0032] The initiator is selected from benzoyl peroxide and / or azobisisobutyronitrile, and the amount of the initiator added is 1-3% of the total weight of acrylamide, styrene and propenyltrichlorosilane.

[0033] The amount of initiator added in the present application is larger than that in the conventional styrene and acrylamide copolymerization, because the reaction activity of propenyltrichlorosilane in the polymerization is low, and therefore more initiator is needed to initiate to improve the reaction efficiency.

[0034] Preferably, the initiator is selected from benzoyl peroxide and azobisisobutyronitrile in a weight ratio of 1:1, because the reaction activity of propenyltrichlorosilane is low, the present application can improve the reaction efficiency of propenyltrichlorosilane and reduce the reaction time by co-initiation of the two initiators.

[0035] The amount of sodium dodecyl benzene sulfonate added is 1-3% of the total weight of acrylamide, styrene and propenyltrichlorosilane.

[0036] Optionally, the flame retardant is selected from nitrogen-containing flame retardants or phosphorus-containing flame retardants.

[0037] Preferably, the flame retardant is selected from melamine and [(6-oxo-6H-dibenzo[C,E][1,2]oxaphosphorin-6-yl)methyl] butanedioic acid in a weight ratio of 1:1.

[0038] The flame retardant can achieve the best flame retardant effect, and the [(6-oxo-6H-dibenzo[C,E][1,2]oxaphosphorin-6-yl)methyl] butanedioic acid also contains a carboxyl group, which can also react with the epoxy group in the epoxy silicone rubber under the action of the catalyst, thereby introducing the flame retardant into the crosslinked network and promoting the dispersion of the flame retardant.

[0039] Optionally, the dispersant is selected from at least one of sodium silicate, sodium metaphosphate and triethanolamine;

[0040] The antioxidant is selected from at least one of antioxidant 168, antioxidant 1010 and antioxidant 1076;

[0041] The light stabilizer is selected from poly[1-(2'-hydroxyethyl)-2,2,6,6-tetramethyl-4-hydroxypiperidinium succinate] (light stabilizer 622) or poly[[6-[(1,1,3,3-tetramethylbutyl)amino]-1,3,5-triazine-2,4-diyl][(2,2,6,6-tetramethyl-4-piperidinyl)imino]-1,6-di(hexanediyl)[(2,2,6,6-tetramethyl-4-piperidinyl)imino]] (light stabilizer TH-944), preferably poly[[6-[(1,1,3,3-tetramethylbutyl)amino]-1,3,5-triazine-2,4-diyl][(2,2,6,6-tetramethyl-4-piperidinyl)imino]-1,6-di(hexanediyl)[(2,2,6,6-tetramethyl-4-piperidinyl)imino]].

[0042] The anti-dripping agent is selected from polytetrafluoroethylene or anti-dripping agent SN3310.

[0043] The catalyst is selected from at least one of triethylamine, zinc chloride, sodium hydroxide, preferably sodium hydroxide.

[0044] Optionally, the polycarbonate has a melt index (MI) of 5 g / 10 min to 20 g / 10 min, preferably 10 g / 10 min, at 300°C under a load of 1.2 Kg.

[0045] According to a second aspect of the present application, a method for preparing the composite material of any one of the above is provided, comprising the following steps:

[0046] (1) mixing the polycarbonate, 1 / 2 of the dispersant, 1 / 2 of the compatibilizing agent, the flame retardant, and the anti-dripping agent to obtain a first mixture;

[0047] mixing the epoxidized silicone rubber, 1 / 2 of the dispersant, 1 / 2 of the compatibilizing agent, the antioxidant, the light stabilizer, and the catalyst to obtain a second mixture;

[0048] (2) mixing the first mixture and the second mixture, and then adding them into an extruder, melting, extruding, and granulating to obtain the composite material.

[0049] Optionally, the extruder is a twin-screw extruder, and the extruder has an extrusion temperature of 220-280°C and a rotation speed of 200-500 rpm.

[0050] According to a third aspect of the present application, the composite material of any one of the above is applied in building materials.

[0051] The beneficial effects of the present application include but are not limited to:

[0052] 1. The temperature-resistant, flame-retardant and corrosion-resistant building composite material according to the present application, the addition of the epoxidized silicone rubber can simultaneously improve the temperature-resistant, flame-retardant and corrosion-resistant effects of the material, and the epoxy groups contained therein can chemically connect with the benzotriazole and the compatibilizing agent, promoting the uniform dispersion of the raw materials and the formation of a protective layer, thereby significantly improving the temperature-resistant, flame-retardant and corrosion-resistant properties.

[0053] 2. The temperature-resistant, flame-retardant and corrosion-resistant building composite material according to the present application, the use of the epoxidized phenyl silicone rubber can further improve the flame retardance of the material while maintaining good temperature resistance, and under the above-mentioned limitations of the vinyl content and the epoxy content, the temperature-resistant, flame-retardant and corrosion-resistant effects of the material can be optimized.

[0054] 3. The temperature-resistant, flame-retardant and corrosion-resistant building composite material according to the present application, the poor compatibility of the polycarbonate and the epoxidized silicone rubber can affect the performance uniformity of the components formed by the material, and the addition of the compatibilizing agent can effectively improve the compatibility of the polycarbonate and the epoxidized silicone rubber, so as to obtain a building material with good uniformity of various properties.

[0055] 4. The preparation method of the temperature-resistant, flame-retardant and corrosion-resistant building composite material according to the present application, by pre-mixing the polycarbonate and the epoxidized silicone rubber with other additives respectively to form a first mixture and a second mixture, the dispersibility of the additives in the material can be effectively improved, and the dispersion uniformity of the polycarbonate and the epoxidized silicone rubber can be improved, so as to obtain a building material with more uniform properties. DETAILED DESCRIPTION

[0056] The present application will be described in detail below in conjunction with examples, but the present application is not limited to these examples.

[0057] Unless otherwise specified, the raw materials in the examples and comparative examples of the present application are purchased through commercial channels. The epoxidized silicone rubber in the following examples and comparative examples is obtained by the preparation method of Example 1 of CN110358091B. The melt index (MI) of the polycarbonate at 300℃ under a load of 1.2Kg is 10g / 10min.

[0058] The methods used in the examples and comparative examples of the present application are conventional methods in the prior art unless otherwise specified. In the preparation of the compatibilizing agent in the following examples and comparative examples, the solvent used is not specifically limited as long as it can ensure good solubility of the raw materials and facilitate the subsequent discharge of the product. The temperature of the extruder in the following examples and comparative examples is 220-280℃, specifically, the temperature of the extruder is divided into five sections, the temperature of the conveying section is 220-230℃, the temperature of the melting section is 230-250℃, the temperature of the mixing section is 250-260℃, the temperature of the exhaust section is 260-270℃, the temperature of the homogenizing section is 270-280℃, and the temperature of the extrusion die is 270-280℃.

[0059] Example 1

[0060] The present embodiment relates to a temperature-resistant, flame-retardant, and corrosion-resistant composite material for building and a preparation method thereof. The composite material comprises, by weight fraction:

[0061] 60 parts of polycarbonate, 8 parts of sodium silicate, 10 parts of epoxidized silicone rubber, 1 part of benzotriazole, 1 part of melamine, 3 parts of compatibilizing agent, 0.3 parts of antioxidant 168, 0.2 parts of light stabilizer 622, 0.15 parts of polytetrafluoroethylene, and 0.2 parts of catalyst.

[0062] The preparation method of the composite material comprises the following steps:

[0063] (1) mixing the polycarbonate, 1 / 2 of the sodium silicate, 1 / 2 of the compatibilizing agent, the benzotriazole, the melamine, and the polytetrafluoroethylene to obtain a first mixture;

[0064] mixing the epoxidized silicone rubber, 1 / 2 of the sodium silicate, 1 / 2 of the compatibilizing agent, the antioxidant 168, the light stabilizer 622, and the sodium hydroxide to obtain a second mixture;

[0065] (2) mixing the first mixture and the second mixture, and then adding them to an extruder, extruding and granulating at 220-280℃ and 200 revolutions per minute to obtain the composite material.

[0066] The compatibilizing agent is obtained by copolymerization of acrylamide, styrene, and allyldimethylsilane at a weight ratio of 3:3:1, and the preparation method of the compatibilizing agent is as follows:

[0067] S1: adding 1 / 3 of the acrylamide and 1 / 2 of the styrene into a solvent, then adding 3% of the total weight of the acrylamide, the styrene, and the allyldimethylsilane initiator (benzoyl peroxide and azobisisobutyronitrile at a weight ratio of 1:1) and 3% of the total weight of the acrylamide, the styrene, and the allyldimethylsilane sodium dodecylbenzenesulfonate, and reacting at 60℃ for 3h to obtain a prepolymer;

[0068] S2: add the rest of acrylamide, styrene and allyl dimethyl silane to the prepolymer, continue to react at the temperature for 5h, then increase the temperature to 95℃ for 0.5h, discharge, filter, wash, dry to obtain the compatilizer.

[0069] Example 2

[0070] The present embodiment relates to a temperature-resistant, flame-retardant, corrosion-resistant building composite material and a preparation method thereof. The composite material comprises, by weight fraction:

[0071] Polycarbonate 80 parts, sodium hexametaphosphate 10 parts, epoxidized silicone rubber 20 parts, benzotriazole 5 parts, melamine 5 parts, compatilizer 5 parts, antioxidant 1010 0.5 parts, light stabilizer 622 0.5 parts, anti-dripping agent SN3310 0.3 parts, catalyst 0.4 parts.

[0072] The preparation method of the composite material comprises the following steps:

[0073] (1) Mix the polycarbonate, 1 / 2 of the sodium hexametaphosphate, 1 / 2 of the compatilizer, benzotriazole, melamine, and anti-dripping agent SN3310 to obtain a first mixture;

[0074] Mix the epoxidized silicone rubber, 1 / 2 of the sodium hexametaphosphate, 1 / 2 of the compatilizer, antioxidant 1010, light stabilizer 622, and sodium hydroxide to obtain a second mixture;

[0075] (2) Mix the first mixture and the second mixture, then add them to an extruder, extrude at 220-280℃ and 500 revolutions per minute, and granulate to obtain the product.

[0076] The compatilizer is obtained by copolymerization of acrylamide, styrene, and allyl(chloromethyl)dimethylsilane at a weight ratio of 5:3:1. The preparation method of the compatilizer is as follows:

[0077] S1: Add 1 / 3 of acrylamide and 1 / 2 of styrene to a solvent, then add 1% of initiator (benzoyl peroxide and azobisisobutyronitrile at a weight ratio of 1:1) and 1% of sodium dodecylbenzenesulfonate based on the total weight of acrylamide, styrene, and allyl(chloromethyl)dimethylsilane, and react at 80℃ for 1h to obtain a prepolymer;

[0078] S2: Add the rest of acrylamide, styrene, and allyl(chloromethyl)dimethylsilane to the prepolymer, continue to react at the temperature for 3h, then increase the temperature to 95℃ for 1h, discharge, filter, wash, and dry to obtain the compatilizer.

[0079] Example 3

[0080] The embodiment relates to a temperature-resistant, flame-retardant, and corrosion-resistant composite material for buildings and a preparation method thereof.

[0081] 70 parts of polycarbonate, 10 parts of triethanolamine, 15 parts of epoxidized silicone rubber, 3 parts of benzotriazole, 3 parts of melamine, 4 parts of a compatibilizing agent, 0.4 parts of antioxidant 1010, 0.3 parts of light stabilizer TH-944, 0.2 parts of polytetrafluoroethylene, and 0.3 parts of a catalyst.

[0082] The preparation method of the composite material comprises the following steps:

[0083] (1) mixing the polycarbonate, 1 / 2 of the triethanolamine, 1 / 2 of the compatibilizing agent, the benzotriazole, the melamine, and the polytetrafluoroethylene to obtain a first mixture;

[0084] mixing the epoxidized silicone rubber, 1 / 2 of the triethanolamine, 1 / 2 of the compatibilizing agent, the antioxidant 1010, the light stabilizer TH-944, and sodium hydroxide to obtain a second mixture;

[0085] (2) mixing the first mixture and the second mixture, and then adding the mixture into an extruder, extruding and granulating at 220-280 DEG C and 400 r / min, and obtaining the composite material.

[0086] The compatibilizing agent is obtained by copolymerization of acrylamide, styrene, and propenyltrichlorosilane at a weight ratio of 5:4:1, and the preparation method of the compatibilizing agent is as follows:

[0087] S1: adding 1 / 3 of acrylamide and 1 / 2 of styrene into a solvent, then adding 2.5% of an initiator (benzoyl peroxide and azobisisobutyronitrile at a weight ratio of 1:1) and 2% of sodium dodecylbenzenesulfonate based on the total weight of acrylamide, styrene, and propenyltrichlorosilane, and reacting at 70 DEG C for 2.5 h to obtain a prepolymer;

[0088] S2: adding the remaining acrylamide, styrene, and propenyltrichlorosilane into the prepolymer, continuing to react at the temperature for 4 h, then increasing the temperature to 95 DEG C and reacting for 1 h, and discharging, filtering, washing, and drying to obtain the compatibilizing agent.

[0089] Example 4

[0090] The difference between the embodiment and example 3 is that melamine and [(6-oxo-6H-dibenzo[C,E][1,2]oxaphosphorin-6-yl)methyl] butanedioic acid are used to replace the melamine at a weight ratio of 1:1.

[0091] Example 5

[0092] The difference between this example and example 3 is that the compatibilizing aid is obtained by copolymerization of acrylamide, styrene and propenyltrichlorosilane in a weight ratio of 1:4:1.

[0093] Example 6

[0094] The difference between this example and example 3 is that the compatibilizing aid is obtained by copolymerization of acrylamide and styrene in a weight ratio of 5:4.

[0095] Example 7

[0096] The difference between this example and example 3 is that allyldimethylsilane is used instead of propenyltrichlorosilane.

[0097] Comparative Example 1

[0098] The difference between this comparative example and example 3 is that un-epoxidized phenyl silicone rubber is used, which is prepared by the preparation method in paragraphs

[0041] -

[0045] of example 1 of CN110358091B.

[0099] Comparative Example 2

[0100] The difference between this comparative example and example 3 is that the epoxidized silicone rubber is 25 parts.

[0101] Test Example 1

[0102] The composite materials of the above examples and comparative examples are prepared into test bars by using an injection molding machine, and the test bars are subjected to the following tests, and the test results are shown in Table 1.

[0103] 1. Tensile strength: tested according to GB / T 1040;

[0104] 2. Impact strength: tested according to ISO 179-1;

[0105] 3. Heat distortion temperature: tested according to GB 1634;

[0106] 4. Oxygen index: tested according to GB / T 2406.2-2009.

[0107] Table 1

[0108]

[0109] According to the test data of examples 1-3, the greater the amount of epoxidized silicone rubber added, the lower the tensile strength and heat distortion temperature, but the higher the impact strength and oxygen index, and according to the comparison between example 3 and comparative example 2, it can be known that by controlling the amount of epoxidized silicone rubber added, the negative effects of silicone rubber on tensile strength and heat distortion temperature can be balanced.

[0110] Test Example 2

[0111] The composite materials of the above examples and comparative examples were prepared into test bars by using an injection molding machine, the test bars were respectively soaked in 50% sulfuric acid and 5% sodium hydroxide solution for 10h, and then the treated tensile strength was tested by using the test method of tensile strength of Example 1, and the reduction rate of tensile strength was reduced, and the test results are shown in Table 2.

[0112] Table 2

[0113]

[0114] According to the above data, the composite material of the application has good corrosion prevention effect, and can be used in high corrosive use scenarios, thereby improving the use demand of the composite material in a corrosive environment.

[0115] Test Example 3

[0116] The composite materials of the above examples and comparative examples were prepared into test bars by using an injection molding machine, the test bars were respectively soaked in 50% sulfuric acid and 5% sodium hydroxide solution for 10h, and then the treated tensile strength was tested by using the test method of tensile strength of Example 1, and the reduction rate of tensile strength was reduced, and the test results are shown in Table 2.

[0117] Table 3

[0118]

[0119]

[0120] According to the above test data, after the test bar made of the composite material of the application is subjected to ultra-low temperature and high temperature treatment, the mechanical strength of the material will decrease, but since the epoxidized silicone rubber can react with the compatible aid, the decrease in mechanical properties is not large, and the building requirements can be met.

[0121] The above is only an embodiment of the application, and the protection scope of the application is not limited by these specific embodiments, but is determined by the claims of the application. The application can have various changes and variations for those skilled in the art. Any modification, equivalent replacement, improvement, etc. within the technical idea and principle of the application shall be included in the protection scope of the application.

Claims

1. A temperature-resistant, flame-retardant, and corrosion-resistant building composite material, characterized in that, By weight, including: The composition includes: 60-80 parts polycarbonate, 8-10 parts dispersant, 10-20 parts epoxidized silicone rubber, 1-5 parts benzotriazole, 1-5 parts flame retardant, 3-5 parts compatibilizer, 0.3-0.5 parts antioxidant, 0.2-0.5 parts light stabilizer, 0.15-0.3 parts anti-dripping agent, and 0.2-0.4 parts catalyst. The epoxidized silicone rubber is epoxidized phenyl silicone rubber; The compatibility aid is obtained by copolymerizing acrylamide, styrene and allylsilane in a weight ratio of (3-5):(3-4):1; The dispersant is selected from at least one of sodium silicate, sodium hexametaphosphate, and triethanolamine.

2. The composite material according to claim 1, characterized in that, The allylsilane is selected from at least one of allyl dimethylsilane, propenyl trichlorosilane, allyl (chloromethyl) dimethylsilane, and trimethylallyloxysilane.

3. The composite material according to claim 1, characterized in that, The flame retardant is selected from nitrogen-containing flame retardants or phosphorus-containing flame retardants.

4. The composite material according to claim 1, characterized in that, The antioxidant is selected from at least one of antioxidant 168, antioxidant 1010, and antioxidant 1076; The light stabilizer is selected from poly[1-(2'-hydroxyethyl)-2,2,6,6-tetramethyl-4-hydroxypiperidine succinate] or poly[[6-[(1,1,3,3-tetramethylbutyl)amine]-1,3,5-triazine-2,4-diyl][(2,2,6,6-tetramethyl-4-piperidine)imine]-1,6-dihexadiyl[(2,2,6,6-tetramethyl-4-piperidine)imine]]]; The anti-dripping agent is selected from polytetrafluoroethylene or anti-dripping agent SN3310; The catalyst is selected from at least one of triethylamine, zinc chloride, and sodium hydroxide.

5. The method for preparing the composite material according to any one of claims 1-4, characterized in that, Includes the following steps: (1) The polycarbonate, 1 / 2 of the dispersant, 1 / 2 of the compatibility agent, benzotriazole, flame retardant and anti-dripping agent are mixed to obtain a first mixture; The epoxy silicone rubber, 1 / 2 of the dispersant, 1 / 2 of the compatibility agent, antioxidant, light stabilizer and catalyst are mixed to obtain a second mixture; (2) Mix the first mixture and the second mixture, then add them to an extruder, extrude and granulate to obtain the final product.

6. The preparation method according to claim 5, characterized in that, The extruder is a twin-screw extruder, with an extrusion temperature of 220-280℃ and a rotation speed of 200-500 rpm.

7. The application of the composite material according to any one of claims 1-4 in building materials.

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