Outdoor rigid polyvinyl chloride material and method for producing same, and article thereof

Abstract

The application provides an outdoor hard polyvinyl chloride material and a preparation method and products thereof. The preparation raw materials of the outdoor hard polyvinyl chloride material include, in terms of weight parts, 80-100 parts of polyvinyl chloride resin, 15-50 parts of chlorinated polyvinyl chloride resin, 50-100 parts of acrylonitrile-styrene-acrylate terpolymer, 3-15 parts of impact modifier, 0.1-5.0 parts of processing aid, 0.1-5.0 parts of lubricant and 0-10 parts of other aids. The impact modifier includes methyl methacrylate-butadiene-styrene terpolymer and chlorinated polyethylene, the processing aid includes ACR acrylic resin, and the lubricant includes a first lubricant and a second lubricant. The melting point of the first lubricant is 20-70 DEG C, and the melting point of the second lubricant is 100-115 DEG C. The outdoor hard polyvinyl chloride material has good compatibility of each component, high impact strength, weather resistance, low specific gravity and meets the use requirement of base station antenna cover materials.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of polyvinyl chloride synthesis, in particular to an outdoor rigid polyvinyl chloride material, a preparation method thereof and a product thereof. BACKGROUND

[0002] With the evolution of mobile communication network to 5G, it is necessary for 5G base station antennas to be high quality, lightweight and integrated. The main structure of the 5G base station antenna mainly consists of a cover, a reflecting plate, a feed network and a dipole, etc. Although internal electronic components play a major role in 5G base stations in mobile communication, the external antenna cover also plays a crucial role in ensuring signal transmission and protecting the normal operation of electronic components. Since the base station antenna cover is placed outdoors for a long time, it is often subjected to external harsh environments (such as storms, snow, dust and solar radiation, etc.) during use, so the base station antenna cover material needs to have high weather resistance and mechanical properties, such as impact strength.

[0003] The existing market mainly has the following several materials of base station antenna cover: 1. Polyimide composite material, although its performance is excellent, but the price is too high, which cannot be used in large area. 2. Continuous glass fiber reinforced polypropylene composite material (CGF-PP), although it can meet the requirements of high frequency and low loss of materials for 5G communication, but its specific gravity is large, which is not convenient for high-altitude installation operation, and the impact resistance is poor.

[0004] Rigid polyvinyl chloride (RPVC) material is widely used in various industries due to its low cost, inherent flame retardancy, and ease of modification, especially in the processing industry of building, white goods, etc. However, polyvinyl chloride resin is difficult to process, brittle, and has poor toughness. By adjusting the formula system of RPVC and matching appropriate modification additives to improve the weather resistance, mechanical properties, mechanical strength and processing performance of RPVC, and the specific gravity is light, which can meet the use requirements of base station antenna cover shell. However, the current rigid polyvinyl chloride material has a big problem, that is, the compatibility of various modification additives and polyvinyl chloride resin is poor. If the compatibility is poor, it cannot be uniformly dispersed, which will greatly affect the impact strength of the rigid polyvinyl chloride, and it is difficult to meet the use requirements of base station antenna cover material. SUMMARY

[0005] Based on the above problems, the purpose of the present application is to provide an outdoor rigid polyvinyl chloride material, a preparation method thereof and a product thereof. The compatibility of each component in the outdoor rigid polyvinyl chloride material is good, has high impact strength, weather resistance, low specific gravity, and meets the use requirements of base station antenna cover material.

[0006] To achieve the above object, the present application provides, in one aspect, an outdoor hard polyvinyl chloride material, wherein the raw materials are prepared by 80-100 parts of polyvinyl chloride resin, 15-50 parts of chlorinated polyvinyl chloride resin, 50-100 parts of acrylonitrile-styrene-acrylate terpolymer, 3-15 parts of impact modifier, 0.1-5.0 parts of processing aid, 0.1-5.0 parts of lubricant and 0-10 parts of other additives, the impact modifier comprises methyl methacrylate-butadiene-styrene terpolymer and chlorinated polyethylene, the processing aid comprises ACR acrylic resin, and the lubricant comprises a first lubricant with a melting point of 20-70℃ and a second lubricant with a melting point of 100-115℃.

[0007] The outdoor hard polyvinyl chloride material of the present application has at least the following technical effects.

[0008] (1) The addition of styrene-acrylonitrile-acrylate terpolymer to the polyvinyl chloride resin and chlorinated polyvinyl chloride resin can achieve excellent weather resistance.

[0009] (2) The methyl methacrylate-butadiene-styrene terpolymer and chlorinated polyethylene are selected as the impact modifier, wherein the methyl methacrylate-butadiene-styrene terpolymer has a relatively high content of unsaturated vinyl component, and the combination of the methyl methacrylate-butadiene-styrene terpolymer and chlorinated polyethylene has moderate compatibility with the polyvinyl chloride resin and chlorinated polyvinyl chloride resin, which neither makes the compatibility too large to completely mix at the molecular level and change the effect of the impact modifier, nor makes the compatibility too small to achieve uniform dispersion and lose the adhesion of the impact modifier to the polyvinyl chloride, thus failing to absorb the vibration. In addition, the relatively low glass transition temperature of the chlorinated polyethylene can increase the impact resistance of the material at low temperature, thus expanding the application range of the impact resistance.

[0010] (3) The ACR acrylic resin as the processing aid can expand the processing window of the polyvinyl chloride and improve the processing performance of the polyvinyl chloride.

[0011] (4) The use of two types of lubricants with different melting points can make the low-melting-point first lubricant melt and play a lubricating role at the initial stage of molding, and make the high-melting-point second lubricant melt and play a lubricating role at the middle and late stages of molding, thus playing a lubricating role throughout the molding process, reducing the melt viscosity during molding, increasing the flowability, reducing the local overheating and causing the decomposition of the polyvinyl chloride, and controlling the plasticizing rate.

[0012] Preferably, the other additives comprise at least one of heat stabilizers and weather resistance modifiers.

[0013] Preferably, the heat stabilizers comprise organic tin heat stabilizers and / or calcium-zinc heat stabilizers.

[0014] Preferably, the weather resistance modifier comprises at least one of an antioxidant, an ultraviolet light absorber, and a hindered amine light stabilizer.

[0015] Preferably, the weight ratio of the first lubricant to the second lubricant is 10-30:70-90.

[0016] Preferably, the first lubricant comprises at least one of liquid paraffin, natural paraffin, n-butyl stearate, and stearic acid.

[0017] Preferably, the second lubricant comprises PE wax and / or OPE wax.

[0018] The second aspect of the present application provides a method for preparing a rigid polyvinyl chloride material for outdoor use, comprising the steps of:

[0019] (1) placing the polyvinyl chloride resin, the chlorinated polyvinyl chloride resin, and the acrylonitrile-styrene-acrylate terpolymer in a high-speed kneader to stir to obtain a primary mixture;

[0020] (2) adding the first lubricant and other additives and mixing uniformly to obtain a secondary mixture;

[0021] (3) after increasing to a first temperature, adding the impact modifier, the processing aid, and the second lubricant, and then increasing to a second temperature to stir for a certain period of time, extruding, pelletizing, and cooling.

[0022] Further, the first temperature is between the melting points of the first lubricant and the second lubricant, and the second temperature is higher than the melting point of the second lubricant.

[0023] In the preparation method, after mixing the polyvinyl chloride resin, the chlorinated polyvinyl chloride resin, and the acrylonitrile-styrene-acrylate terpolymer, the first lubricant and other additives are added first, and then increased to a first temperature. During the heating process, the first lubricant is first melted to form a lubricating film to play a lubricating role, which can avoid affecting the lubricating effect due to a large amount of volatilization when added at a too high temperature. Before the second temperature increase, the second lubricant is added first. Similarly, the second lubricant is first melted during the heating process to form a lubricating film or penetrate into the polyvinyl chloride particles to play a lubricating role. The volatilization amount of the first lubricant and the second lubricant is greatly reduced, which can avoid the volatilization blocking the mold system during the subsequent cooling process and affecting the use.

[0024] The third aspect of the present application provides a rigid polyvinyl chloride product for outdoor use, which uses the aforementioned rigid polyvinyl chloride material for outdoor use, is put into a two-roll rubber mill, plasticated at 170-180°C for 5-20 min, and then molded at 180-200°C. DETAILED DESCRIPTION

[0025] The outdoor hard PVC product of the present application can be used for the shell of base station antenna, of course, due to its better weather resistance and impact strength, it can also be used as other outdoor protective materials. The outdoor hard PVC product can be prepared by feeding the hard PVC material into a two-roll rubber mill for plasticizing at 170-180°C for 5-20 min, and then molding at 180-200°C.

[0026] The outdoor hard PVC material is prepared from 80-100 parts of PVC resin, 15-50 parts of chlorinated PVC resin, 50-100 parts of acrylonitrile-styrene-acrylate terpolymer, 3-15 parts of impact modifier, 0.1-5.0 parts of processing aid, 0.1-5.0 parts of lubricant and 0-10 parts of other auxiliary agents, all by weight.

[0027] In actual operation, the weight fraction of the PVC resin can be but is not limited to 80 parts, 82 parts, 84 parts, 86 parts, 88 parts, 90 parts, 93 parts, 95 parts, 97 parts, 99 parts or 100 parts. The weight fraction of the chlorinated PVC resin can be but is not limited to 15 parts, 20 parts, 25 parts, 30 parts, 35 parts, 40 parts, 45 parts or 50 parts. The weight fraction of the acrylonitrile-styrene-acrylate terpolymer can be but is not limited to 50 parts, 55 parts, 60 parts, 65 parts, 70 parts, 75 parts, 80 parts, 85 parts, 90 parts, 95 parts or 100 parts.

[0028] The weight fraction of the impact modifier can be but is not limited to 3 parts, 4 parts, 5 parts, 6 parts, 7 parts, 8 parts, 9 parts, 10 parts, 11 parts, 12 parts, 13 parts, 14 parts or 15 parts. The impact modifier includes methyl methacrylate-butadiene-styrene terpolymer and chlorinated polyethylene. The weight ratio of the methyl methacrylate-butadiene-styrene terpolymer to the chlorinated polyethylene can be 1-7:3-9.

[0029] The weight fraction of the processing aid can be but is not limited to 0.1 part, 0.5 part, 1.0 part, 1.5 part, 2.0 part, 2.5 part, 3.0 part, 3.5 part, 4.0 part, 4.5 part or 5.0 part. The processing aid includes ACR acrylic resin.

[0030] The weight fraction of the lubricant can be, but is not limited to, 0.1 parts, 0.5 parts, 1.0 parts, 1.5 parts, 2.0 parts, 2.5 parts, 3.0 parts, 3.5 parts, 4.0 parts, 4.5 parts, 5.0 parts. The lubricant includes a first lubricant and a second lubricant, the melting point of the first lubricant is 20-70℃, and the melting point of the second lubricant is 100-115℃. The weight ratio of the first lubricant to the second lubricant is 10-30:70-90. The first lubricant includes at least one of liquid paraffin, natural paraffin, n-butyl stearate, and stearic acid. The second lubricant includes PE wax and / or OPE wax.

[0031] The weight fraction of the other auxiliary agent can be, but is not limited to, 0 parts, 1 parts, 2 parts, 3 parts, 4 parts, 5 parts, 6 parts, 7 parts, 8 parts, 9 parts, 10 parts. The other auxiliary agent includes at least one of a heat stabilizer and a weathering modifier. The heat stabilizer includes an organic tin heat stabilizer and / or a calcium-zinc heat stabilizer. The weathering modifier includes at least one of an antioxidant, an ultraviolet light absorber, and a hindered amine light stabilizer.

[0032] In addition, the preparation method of the outdoor rigid polyvinyl chloride material can include the following steps.

[0033] (1) The polyvinyl chloride resin, the chlorinated polyvinyl chloride resin, and the acrylonitrile-styrene-acrylate terpolymer are placed in a high-speed kneader to stir to obtain a main mixture.

[0034] (2) The first lubricant and the other auxiliary agent are added and uniformly mixed to obtain a secondary mixture.

[0035] (3) After rising to a first temperature, the impact modifier, the processing aid, and the second lubricant are added, and then stirred at a second temperature for a certain period of time, extruded, pelletized, and cooled.

[0036] Further, the first temperature is between the melting points of the first lubricant and the second lubricant, and the second temperature is higher than the melting point of the second lubricant. The first temperature can be 40-75℃, and the second temperature can be 115-125℃. As an example, the first temperature can be, but is not limited to, 40℃, 45℃, 50℃, 55℃, 60℃, 65℃, 70℃, 75℃, and the second temperature can be, but is not limited to, 115℃, 116℃, 117℃, 118℃, 119℃, 120℃, 121℃, 122℃, 123℃, 124℃, 125℃. The stirring time can be 0.5-5.0h, and as an example, the time can be, but is not limited to, 0.5h, 1.0h, 1.5h, 2.0h, 2.5h, 3.0h, 3.5h, 4.0h, 4.5h, 5.0h.

[0037] For better illustrating the object, technical scheme and beneficial effects of the present application, the present application will be further explained in combination with specific examples. It should be noted that the following described method is a further explanation of the present application, and should not be regarded as a limitation of the present application.

[0038] Example 1

[0039] The present example is a kind of outdoor rigid polyvinyl chloride material. The preparation raw materials of the outdoor rigid polyvinyl chloride material include 100 parts of polyvinyl chloride resin, 15 parts of chlorinated polyvinyl chloride resin, 50 parts of acrylonitrile-styrene-acrylate terpolymer, 5 parts of methyl methacrylate-butadiene-styrene terpolymer, 3 parts of chlorinated polyethylene, 3 parts of ACR acrylic resin, 0.6 parts of liquid paraffin, 2.4 parts of PE wax, 2 parts of organic tin heat stabilizer and 1 part of antioxidant 1076, in terms of parts by weight.

[0040] The preparation method of the outdoor rigid polyvinyl chloride material of the present example can be:

[0041] (1) The polyvinyl chloride resin, chlorinated polyvinyl chloride resin and acrylonitrile-styrene-acrylate terpolymer are placed in a high-speed kneader to stir to obtain a main mixture;

[0042] (2) The liquid paraffin, organic tin heat stabilizer and antioxidant 1076 are added and uniformly mixed to obtain a secondary mixture;

[0043] (3) After rising to 65℃, the methyl methacrylate-butadiene-styrene terpolymer, chlorinated polyethylene, ACR acrylic resin and PE wax are added, and then rising to 120℃, stirring for 2h, extruding, cutting and cooling at room temperature.

[0044] Example 2

[0045] The present example is a kind of outdoor rigid polyvinyl chloride material. The preparation raw materials of the outdoor rigid polyvinyl chloride material include 100 parts of polyvinyl chloride resin, 15 parts of chlorinated polyvinyl chloride resin, 100 parts of acrylonitrile-styrene-acrylate terpolymer, 5 parts of methyl methacrylate-butadiene-styrene terpolymer, 3 parts of chlorinated polyethylene, 3 parts of ACR acrylic resin, 0.6 parts of liquid paraffin, 2.4 parts of PE wax, 2 parts of organic tin heat stabilizer and 1 part of antioxidant 1076, in terms of parts by weight.

[0046] The preparation method of the outdoor rigid polyvinyl chloride material of the present example can be:

[0047] (1) The polyvinyl chloride resin, chlorinated polyvinyl chloride resin and acrylonitrile-styrene-acrylate terpolymer are placed in a high-speed kneader to stir to obtain a main mixture;

[0048] (2) adding liquid paraffin, organic tin heat stabilizer and antioxidant 1076 to mix evenly to get secondary mixture;

[0049] (3) after rising to 65°C, adding methyl methacrylate-butadiene-styrene terpolymer, chlorinated polyethylene, ACR acrylic resin and PE wax, then rising to 120°C, stirring for 2h, extruding, cutting, cooling at room temperature.

[0050] Example 3

[0051] This example is a kind of outdoor hard polyvinyl chloride material. The preparation raw materials of outdoor hard polyvinyl chloride material include 100 parts of polyvinyl chloride resin, 25 parts of chlorinated polyvinyl chloride resin, 100 parts of acrylonitrile-styrene-acrylate terpolymer, 5 parts of methyl methacrylate-butadiene-styrene terpolymer, 3 parts of chlorinated polyethylene, 3 parts of ACR acrylic resin, 0.6 parts of liquid paraffin, 2.4 parts of PE wax, 2 parts of organic tin heat stabilizer and 1 part of antioxidant 1076.

[0052] The preparation method of outdoor hard polyvinyl chloride material of this example can be:

[0053] (1) polyvinyl chloride resin, chlorinated polyvinyl chloride resin and acrylonitrile-styrene-acrylate terpolymer are placed in a high-speed kneader to stir to get primary mixture;

[0054] (2) adding liquid paraffin, organic tin heat stabilizer and antioxidant 1076 to mix evenly to get secondary mixture;

[0055] (3) after rising to 65°C, adding methyl methacrylate-butadiene-styrene terpolymer, chlorinated polyethylene, ACR acrylic resin and PE wax, then rising to 120°C, stirring for 2h, extruding, cutting, cooling at room temperature.

[0056] Example 4

[0057] This example is a kind of outdoor hard polyvinyl chloride material. The preparation raw materials of outdoor hard polyvinyl chloride material include 100 parts of polyvinyl chloride resin, 45 parts of chlorinated polyvinyl chloride resin, 75 parts of acrylonitrile-styrene-acrylate terpolymer, 4 parts of methyl methacrylate-butadiene-styrene terpolymer, 6 parts of chlorinated polyethylene, 1 part of ACR acrylic resin, 1.0 parts of liquid paraffin, 3.0 parts of PE wax, 1.5 parts of organic tin heat stabilizer and 2.5 parts of antioxidant 1076.

[0058] The preparation method of outdoor hard polyvinyl chloride material of this example can be:

[0059] (1) polyvinyl chloride resin, chlorinated polyvinyl chloride resin and acrylonitrile-styrene-acrylate terpolymer are placed in a high-speed kneader to stir to get primary mixture;

[0060] (2) Add liquid paraffin, organic tin heat stabilizer and antioxidant 1076 and mix well to obtain a secondary mixture;

[0061] (3) After increasing the temperature to 65°C, add methyl methacrylate-butadiene-styrene terpolymer, chlorinated polyethylene, ACR acrylic resin and PE wax, then increase the temperature to 120°C, stir for 2h, extrude, cut into particles and cool at room temperature.

[0062] Example 5

[0063] This example is a hard outdoor polyvinyl chloride material. The raw materials for preparing the hard outdoor polyvinyl chloride material include, in parts by weight, 100 parts of polyvinyl chloride resin, 15 parts of chlorinated polyvinyl chloride resin, 50 parts of acrylonitrile-styrene-acrylate terpolymer, 5 parts of methyl methacrylate-butadiene-styrene terpolymer, 3 parts of chlorinated polyethylene, 3 parts of ACR acrylic resin, 0.6 parts of liquid paraffin, 2.4 parts of PE wax, 1 part of calcium-zinc heat stabilizer and 0.5 part of hindered amine light-heat stabilizer.

[0064] The preparation method of the hard outdoor polyvinyl chloride material of this example can be as follows:

[0065] (1) Put the polyvinyl chloride resin, chlorinated polyvinyl chloride resin and acrylonitrile-styrene-acrylate terpolymer into a high-speed kneader and stir to obtain a primary mixture;

[0066] (2) Add liquid paraffin, calcium-zinc heat stabilizer and hindered amine light-heat stabilizer and mix well to obtain a secondary mixture;

[0067] (3) After increasing the temperature to 65°C, add methyl methacrylate-butadiene-styrene terpolymer, chlorinated polyethylene, ACR acrylic resin and PE wax, then increase the temperature to 120°C, stir for 2h, extrude, cut into particles and cool at room temperature.

[0068] Example 6

[0069] This example is a hard outdoor polyvinyl chloride material. The raw materials for preparing the hard outdoor polyvinyl chloride material include, in parts by weight, 100 parts of polyvinyl chloride resin, 15 parts of chlorinated polyvinyl chloride resin, 50 parts of acrylonitrile-styrene-acrylate terpolymer, 5 parts of methyl methacrylate-butadiene-styrene terpolymer, 3 parts of chlorinated polyethylene, 3 parts of ACR acrylic resin, 1.8 parts of stearic acid, 2.0 parts of PE wax, 2 parts of organic tin heat stabilizer and 1 part of antioxidant 1076.

[0070] The preparation method of the hard outdoor polyvinyl chloride material of this example can be as follows:

[0071] (1) Put the polyvinyl chloride resin, chlorinated polyvinyl chloride resin and acrylonitrile-styrene-acrylate terpolymer into a high-speed kneader and stir to obtain a primary mixture;

[0072] (2) Add stearic acid, organic tin heat stabilizer and antioxidant 1076 and mix uniformly to obtain a secondary mixture;

[0073] (3) After increasing to 75°C, add methyl methacrylate-butadiene-styrene terpolymer, chlorinated polyethylene, ACR acrylic resin and PE wax, and then increase to 123°C, stir for 1 h, extrude, cut into particles and cool at room temperature.

[0074] Comparative Example 1

[0075] The outdoor hard polyvinyl chloride material of the present comparative example comprises, by weight fraction, 100 parts of polyvinyl chloride resin, 5 parts of methyl methacrylate-butadiene-styrene terpolymer, 3 parts of chlorinated polyethylene, 3 parts of ACR acrylic resin, 0.6 parts of liquid paraffin, 2.4 parts of PE wax, 2 parts of organic tin heat stabilizer and 1 part of antioxidant 1076.

[0076] The preparation method of the outdoor hard polyvinyl chloride material of the present comparative example can be as follows:

[0077] (1) Put the polyvinyl chloride resin into a high-speed kneader and stir to obtain a primary mixture;

[0078] (2) Add liquid paraffin, organic tin heat stabilizer and antioxidant 1076 and mix uniformly to obtain a secondary mixture;

[0079] (3) After increasing to 65°C, add methyl methacrylate-butadiene-styrene terpolymer, chlorinated polyethylene, ACR acrylic resin and PE wax, and then increase to 120°C, stir for 2 h, extrude, cut into particles and cool at room temperature.

[0080] Comparative Example 2

[0081] The outdoor hard polyvinyl chloride material of the present comparative example comprises, by weight fraction, 100 parts of polyvinyl chloride resin, 50 parts of acrylonitrile-styrene-acrylate terpolymer, 5 parts of methyl methacrylate-butadiene-styrene terpolymer, 3 parts of chlorinated polyethylene, 3 parts of ACR acrylic resin, 0.6 parts of liquid paraffin, 2.4 parts of PE wax, 2 parts of organic tin heat stabilizer and 1 part of antioxidant 1076.

[0082] The preparation method of the outdoor hard polyvinyl chloride material of the present comparative example can be as follows:

[0083] (1) Put the polyvinyl chloride resin and acrylonitrile-styrene-acrylate terpolymer into a high-speed kneader and stir to obtain a primary mixture;

[0084] (2) Add liquid paraffin, organic tin heat stabilizer and antioxidant 1076 and mix evenly to obtain a secondary mixture;

[0085] (3) After increasing to 65°C, add methyl methacrylate-butadiene-styrene terpolymer, chlorinated polyethylene, ACR acrylic resin and PE wax, and then increase to 120°C, stir for 2h, extrude, cut into particles and cool at room temperature.

[0086] Comparative Example 3

[0087] The outdoor hard PVC material of the present comparative example comprises, by weight fraction, 100 parts of PVC resin, 15 parts of chlorinated PVC resin, 5 parts of methyl methacrylate-butadiene-styrene terpolymer, 3 parts of chlorinated polyethylene, 3 parts of ACR acrylic resin, 0.6 parts of liquid paraffin, 2.4 parts of PE wax, 2 parts of organic tin heat stabilizer and 1 part of antioxidant 1076.

[0088] The preparation method of the outdoor hard PVC material of the present comparative example can be as follows:

[0089] (1) Put the PVC resin and chlorinated PVC resin into a high-speed kneader and stir to obtain a primary mixture;

[0090] (2) Add liquid paraffin, organic tin heat stabilizer and antioxidant 1076 and mix evenly to obtain a secondary mixture;

[0091] (3) After increasing to 65°C, add methyl methacrylate-butadiene-styrene terpolymer, chlorinated polyethylene, ACR acrylic resin and PE wax, and then increase to 120°C, stir for 2h, extrude, cut into particles and cool at room temperature.

[0092] Comparative Example 4

[0093] The outdoor hard PVC material of the present comparative example comprises, by weight fraction, 100 parts of PVC resin, 15 parts of chlorinated PVC resin, 50 parts of acrylonitrile-styrene-acrylate terpolymer, 3 parts of ACR acrylic resin, 0.6 parts of liquid paraffin, 2.4 parts of PE wax, 2 parts of organic tin heat stabilizer and 1 part of antioxidant 1076.

[0094] The preparation method of the outdoor hard PVC material of the present comparative example can be as follows:

[0095] (1) Put the PVC resin, chlorinated PVC resin and acrylonitrile-styrene-acrylate terpolymer into a high-speed kneader and stir to obtain a primary mixture;

[0096] (2) adding liquid paraffin, organic tin heat stabilizer and antioxidant 1076 to mix evenly to obtain a secondary mixture;

[0097] (3) after rising to 65°C, adding ACR acrylic resin and PE wax, then rising to 120°C, stirring for 2h, extruding, granulating and cooling at room temperature.

[0098] Comparative Example 5

[0099] The outdoor hard polyvinyl chloride material of the present comparative example comprises, by weight fraction, 100 parts of polyvinyl chloride resin, 15 parts of chlorinated polyvinyl chloride resin, 50 parts of acrylonitrile-styrene-acrylate terpolymer, 3 parts of chlorinated polyethylene, 3 parts of ACR acrylic resin, 0.6 parts of liquid paraffin, 2.4 parts of PE wax, 2 parts of organic tin heat stabilizer and 1 part of antioxidant 1076.

[0100] The preparation method of the outdoor hard polyvinyl chloride material of the present comparative example can be as follows:

[0101] (1) placing polyvinyl chloride resin, chlorinated polyvinyl chloride resin and acrylonitrile-styrene-acrylate terpolymer in a high-speed kneader to stir to obtain a primary mixture;

[0102] (2) adding liquid paraffin, organic tin heat stabilizer and antioxidant 1076 to mix evenly to obtain a secondary mixture;

[0103] (3) after rising to 65°C, adding chlorinated polyethylene, ACR acrylic resin and PE wax, then rising to 120°C, stirring for 2h, extruding, granulating and cooling at room temperature.

[0104] Comparative Example 6

[0105] The outdoor hard polyvinyl chloride material of the present comparative example comprises, by weight fraction, 100 parts of polyvinyl chloride resin, 15 parts of chlorinated polyvinyl chloride resin, 50 parts of acrylonitrile-styrene-acrylate terpolymer, 5 parts of methyl methacrylate-butadiene-styrene terpolymer, 3 parts of ACR acrylic resin, 0.6 parts of liquid paraffin, 2.4 parts of PE wax, 2 parts of organic tin heat stabilizer and 1 part of antioxidant 1076.

[0106] The preparation method of the outdoor hard polyvinyl chloride material of the present comparative example can be as follows:

[0107] (1) placing polyvinyl chloride resin, chlorinated polyvinyl chloride resin and acrylonitrile-styrene-acrylate terpolymer in a high-speed kneader to stir to obtain a primary mixture;

[0108] (2) adding liquid paraffin, organic tin heat stabilizer and antioxidant 1076 to mix evenly to obtain a secondary mixture;

[0109] (3) After rising to 65℃, methyl methacrylate-butadiene-styrene terpolymer, ACR acrylic resin and PE wax are added, and then rising to 120℃, stirring for 2h, extruding, granulating, and cooling at room temperature.

[0110] The outdoor hard polyvinyl chloride materials of Examples 1-6 and Comparative Examples 1-6 are put into a two-roll rubber mill and plasticated at 180℃ for 10min, and then molded at 185℃ to obtain products, which are tested for performance, and the results are shown in Table 1, and the testing methods are as follows.

[0111] The specific gravity of the polyvinyl chloride product is tested by using an electronic specific gravity meter. The Vicat softening point is tested by using a plastic PVC hot deformation Vicat softening point tester. The tensile strength and bending strength are tested according to GB / T 1040.1-2006 "Determination of tensile properties of plastics - Part 1: General principles" and GB / T9341-2008 "Determination of flexural properties of plastics". The color difference of the polyvinyl chloride product is tested by using a color difference meter, and the color difference value ΔE before and after UV is calculated.

[0112] Table 1 Test results of Examples 1-6 and Comparative Examples 1-6

[0113]

[0114]

[0115] Among them, the light intensity of UV is silver 15w uv lamp, and the time is 24h.

[0116] As can be seen from the results in Table 1, the outdoor hard polyvinyl chloride material prepared by using polyvinyl chloride resin, chlorinated polyvinyl chloride resin and acrylonitrile-styrene-acrylate terpolymer as main raw materials, and then selecting methyl methacrylate-butadiene-styrene terpolymer and chlorinated polyethylene as impact modifier, and using two types of lubricants with different melting points has a lower specific gravity, higher tensile strength and bending strength, and still has a higher tensile strength and bending strength and a lower color difference value after UV irradiation, indicating that it has good weather resistance and can meet the use requirements of base station radome materials.

[0117] Finally, it should be noted that the above examples are only used to illustrate the technical solutions of the present application, and are not intended to limit the scope of protection of the present application. Although the present application has been described in detail with reference to the preferred embodiments, it is not limited to the embodiments listed in the examples. Those skilled in the art should understand that the technical solutions of the present application can be modified or replaced by equivalents without departing from the essence and scope of the technical solutions of the present application.

Claims

1. An outdoor rigid polyvinyl chloride material, characterized by, The raw materials are prepared by weight parts, including 80-100 parts of polyvinyl chloride resin, 15-50 parts of chlorinated polyvinyl chloride resin, 50-100 parts of acrylonitrile-styrene-acrylate terpolymer, 3-15 parts of impact modifier, 0.1-5.0 parts of processing aid, 0.1-5.0 parts of lubricant and 0-10 parts of other auxiliary agents, the impact modifier includes methyl methacrylate-butadiene-styrene terpolymer and chlorinated polyethylene, the processing aid includes ACR acrylic resin, the lubricant includes first lubricant and second lubricant, the melting point of the first lubricant is 20-70℃, and the melting point of the second lubricant is 100-115℃.

2. The outdoor rigid polyvinyl chloride material according to claim 1, characterized by The other auxiliary agents include at least one of heat stabilizer and weather resistance modifier.

3. The outdoor rigid PVC material according to claim 2, characterized in that, The heat stabilizer includes organic tin heat stabilizer and / or calcium-zinc heat stabilizer.

4. The outdoor rigid PVC material according to claim 2, characterized in that, The weather resistance modifier includes at least one of antioxidant, ultraviolet light absorber and hindered amine light stabilizer.

5. The outdoor rigid PVC material according to claim 1, characterized in that, The weight ratio of the first lubricant to the second lubricant is 10-30:70-90.

6. The outdoor rigid PVC material according to claim 1, characterized in that, The first lubricant includes at least one of liquid paraffin, natural paraffin, n-butyl stearate and stearic acid.

7. The outdoor rigid PVC material according to claim 1, wherein The second lubricant includes PE wax and / or OPE wax.

8. The method of producing a rigid polyvinyl chloride material for outdoor use according to any one of claims 1 to 7, characterized in that, The method includes the steps of: (1) stirring the polyvinyl chloride resin, the chlorinated polyvinyl chloride resin and the acrylonitrile-styrene-acrylate terpolymer in a high-speed kneader to obtain a main mixture; (2) adding the first lubricant and the other auxiliary agents and mixing uniformly to obtain a secondary mixture; (3) after increasing to a first temperature, adding the impact modifier, the processing aid and the second lubricant, and then increasing to a second temperature and stirring for a certain time, extruding, granulating and cooling.

9. The method of producing a rigid polyvinyl chloride material for outdoor use according to claim 8, characterized by, The first temperature is between the melting points of the first lubricant and the second lubricant, and the second temperature is higher than the melting point of the second lubricant.

10. An outdoor rigid polyvinyl chloride article, characterized by: The outdoor hard polyvinyl chloride material prepared by the method according to any one of claims 1-7 or 8-9 is plasticized in a two-roll rubber mill at 170-180℃ for 5-20 min, and then molded at 180-200℃.

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