Wear-resistant and cold-resistant PVC composite material and preparation method thereof

Abstract

The invention particularly relates to a wear-resistant and cold-resistant PVC composite material and a preparation method thereof. The PVC composite material comprises the following raw materials in parts by weight: 90-100 parts of PVC resin powder, 25-35 parts of a plasticizer, 8-15 parts of MBS, 4-8 parts of fluorosilicone resin, 3-7 parts of a styrene-acrylonitrile-glycidyl methacrylate copolymer, 1-5 parts of an acrylate copolymer, 2-5 parts of nano silicon dioxide, 3-8 parts of a synergistic aid, 2-5 parts of a stabilizer and 1-4 parts of a mildew preventive. According to the PVC composite material, the PVC resin powder and the plasticizer are used as matrix raw materials, and the plasticizer, the MBS, the fluorosilicone resin, the synergistic additive and other raw materials are added to be compounded with the PVC resin powder, so that the prepared PVC composite material has excellent wear resistance, cold resistance and mechanical property, and is good in mildew resistance. The preparation method has the advantages of simple process, convenience in operation and control, high production efficiency and the like.

Description

Technical Field

[0001] The present invention relates to the technical field of composite materials, in particular to a wear-resistant and cold-resistant PVC composite material and a preparation method thereof. Background Art

[0002] Polyvinyl chloride, or PVC, is a polymer formed by the free radical polymerization of vinyl chloride monomer in the presence of initiators such as peroxides and azo compounds, or under the influence of light or heat. It is currently widely used in building materials, industrial products, daily necessities, floor coverings, artificial leather, pipes, wire and cable, packaging materials, and other fields. PVC wood flooring films, in particular, have been widely used in architectural decoration due to their aesthetic appearance, ease of processing, and excellent durability. However, existing conventional PVC wood flooring films have several shortcomings in practical use. After prolonged use, they are easily scratched and worn, affecting the product's aesthetics and service life. Furthermore, existing conventional PVC wood flooring films tend to become hard and brittle in low-temperature environments, prone to cracking, limiting their scope of use. While existing research on improving the performance of PVC materials exists, these efforts often focus solely on a single property, failing to address the comprehensive requirements of wear resistance, cold resistance, and mechanical properties. Further improvements are needed. Summary of the Invention

[0003] The purpose of the present invention is to provide a wear-resistant and cold-resistant PVC composite material to solve the above-mentioned deficiencies in the prior art. The PVC composite material has good wear resistance, cold resistance and mechanical properties and a long service life.

[0004] Another object of the present invention is to provide a method for preparing a wear-resistant and cold-resistant PVC composite material, which has the advantages of simple process, convenient operation and control, and high production efficiency. The product quality is stable and is conducive to industrial production.

[0005] The objective of the present invention is achieved through the following technical scheme: a wear-resistant, cold-resistant and mildew-proof PVC composite material, comprising the following raw materials in parts by weight: 90-100 parts of PVC resin powder, 25-35 parts of plasticizer, 8-15 parts of MBS, 4-8 parts of fluorosilicone resin, 3-7 parts of styrene-acrylonitrile-glycidyl methacrylate copolymer, 1-5 parts of acrylic ester copolymer, 2-5 parts of nano-silica, 3-8 parts of synergist, 2-5 parts of stabilizer, and 1-4 parts of mildew inhibitor.

[0006] Furthermore, the PVC resin powder is produced by Tianjin Botian Chemical MP1300L. The MBS is produced by Zhongyuan Chemical M711. The fluorosilicone resin is produced by Guangzhou Kanglunxi Chemical KX-501 fluorosilicone resin. The styrene-acrylonitrile-methacrylate glycidyl ester copolymer is produced by Jiayirong The acrylate copolymer is SAG-002 styrene-acrylonitrile-glycidyl methacrylate copolymer. The acrylate copolymer is Hubei Jusheng JS1870 acrylate copolymer.

[0007] Furthermore, the plasticizer is at least one of dioctyl terephthalate and epoxy soybean oil.

[0008] Furthermore, the plasticizer is composed of dioctyl terephthalate and epoxy soybean oil in a weight ratio of 2-4:1. The use of the above plasticizer helps to improve the flexibility and plasticity of the PVC resin, making the composite material easier to process and shape at room temperature, and improving thermal stability and light stability.

[0009] Furthermore, the stabilizer is at least one of a calcium zinc composite stabilizer, a potassium zinc composite stabilizer, hydrotalcite and dibutyltin dilaurate.

[0010] Furthermore, the stabilizer is composed of a calcium zinc composite stabilizer and hydrotalcite in a weight ratio of 3-5:1-2. The calcium zinc composite stabilizer and the hydrotalcite stabilizer cooperate with each other to help improve the thermal stability, mechanical properties and processing properties of the PVC composite material.

[0011] Furthermore, the synergist is at least one of dioctyl adipate and hydrogenated styrene-butadiene block copolymer.

[0012] Furthermore, each part of the synergist comprises the following raw materials in parts by weight: 2-6 parts of dioctyl adipate and 1-3 parts of hydrogenated styrene-butadiene block copolymer.

[0013] Furthermore, the mildew inhibitor is at least one of nano zinc oxide-loaded montmorillonite, copper zinc pyrithione and N-octyl-4-isothiazoline-3-one.

[0014] Furthermore, the mildew inhibitor comprises nano-zinc oxide-loaded montmorillonite and copper zinc pyrithione in a weight ratio of 2-4:1-2. The zinc oxide content in the nano-zinc oxide-loaded montmorillonite is 6-10%. The present invention utilizes nano-zinc oxide-montmorillonite to slowly release Zn2+ via ion exchange, and copper zinc pyrithione provides broad-spectrum antibacterial properties. The synergistic effect of the nano-zinc oxide-montmorillonite and copper zinc pyrithione helps enhance the mildew resistance of the product.

[0015] The wear-resistant and cold-resistant PVC composite material of the present invention uses PVC resin powder and plasticizer as the matrix raw materials. Plasticizer, MBS, fluorosilicone resin, synergistic aid, styrene-acrylonitrile-glycidyl methacrylate copolymer, and other raw materials are added to the PVC resin powder for compounding. The resulting PVC composite material has excellent wear resistance, cold resistance, and mechanical properties, good mildew resistance, and a long service life. The fluorosilicone resin and nano-silica filler work together to help improve the material's wear resistance, making the wood flooring film less susceptible to wear during long-term use. The combination of MBS and styrene-acrylonitrile-glycidyl methacrylate copolymer synergistically improves the material's overall mechanical properties.

[0016] Another object of the present invention is achieved by the following technical solution: a method for preparing a wear-resistant and cold-resistant PVC composite material, comprising the following steps:

[0017] (1) Add PVC resin powder into a blender and stir, then add plasticizer and continue stirring until the plasticizer and PVC resin powder are evenly mixed to obtain material A;

[0018] (2) adding MBS, fluorosilicone resin, synergist, styrene-acrylonitrile-glycidyl methacrylate copolymer, acrylic ester copolymer, nano-silica, stabilizer and mildew inhibitor to material A, stirring to uniformly mix the raw materials to obtain material B;

[0019] (3) Add material B to an internal mixer and mix to obtain material C.

[0020] (4) Material C is placed in an extruder for extrusion granulation, and strip materials are extruded through the die head of the extruder, and then passed through a water-cooling or air-cooling granulation system to prepare film composite granules for PVC wood flooring.

[0021] Furthermore, in step (1), PVC resin powder is added to a mixer and stirred at a speed of 500-800 r / min for 5-15 min, and then a plasticizer is added and stirred at a speed of 300-600 r / min for 10-20 min to fully mix the plasticizer and PVC resin powder to obtain material A.

[0022] Furthermore, in step (2), the stirring speed is 400-800 r / min, and the stirring is carried out for 15-25 min.

[0023] Furthermore, in step (2), material B is added to an internal mixer for internal mixing at a mixing temperature of 150-160° C., a rotor speed of 40-80 r / min, and a mixing time of 10-20 min to obtain material C.

[0024] Furthermore, in step (4), a twin-screw extruder is used for extrusion granulation, and the temperatures of the zones of the twin-screw extruder are: zone 1 temperature: 165-175°C, zone 2 temperature: 1750-185°C, zone 3 temperature: 185-195°C, zone 4 temperature: 195-205°C, die head temperature: 185-195°C, and the screw speed of the screw extruder is 400-500rpm.

[0025] The present invention adopts the above raw materials and preparation method to prepare a product with good wear resistance, cold resistance and mechanical properties. The preparation method has simple process, convenient operation and control, high production efficiency, stable product quality and high product yield.

[0026] Furthermore, the preparation method of the wear-resistant and cold-resistant PVC composite material also includes step (5): using a calendering mechanism to calender the PVC wood floor film composite particles into a film, and then placing it at a temperature of 45-55°C for 40-56 hours to obtain the PVC wood floor film; and then cutting and vacuum-packing the PVC wood floor film for standby use.

[0027] The present invention has the beneficial effects of using PVC resin powder and a plasticizer as matrix raw materials, and adding plasticizers, MBS, fluorosilicone resin, synergistic aids, styrene-acrylonitrile-glycidyl methacrylate copolymer, and other raw materials to compound with the PVC resin powder. The resulting PVC composite material has excellent wear resistance, cold resistance, and mechanical properties, good mildew resistance, and a long service life. The preparation method has the advantages of simple process, convenient operation and control, high production efficiency, and the resulting product has stable quality, which is conducive to industrial production. DETAILED DESCRIPTION

[0028] In order to facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the embodiments. The contents mentioned in the embodiments are not intended to limit the present invention.

[0029] In some embodiments of the present invention, a wear-resistant, cold-resistant and mildew-resistant PVC composite material includes the following raw materials in parts by weight: 90-100 parts of PVC resin powder, 25-35 parts of plasticizer, 8-15 parts of MBS, 4-8 parts of fluorosilicone resin, 3-7 parts of styrene-acrylonitrile-glycidyl methacrylate copolymer, 1-5 parts of acrylic ester copolymer, 2-5 parts of nano-silica, 3-8 parts of synergist, 2-5 parts of stabilizer, and 1-4 parts of mildew inhibitor.

[0030] In some embodiments of the present invention, the plasticizer is at least one of dioctyl terephthalate and epoxidized soybean oil.

[0031] In some embodiments of the present invention, the plasticizer is composed of dioctyl terephthalate and epoxy soybean oil in a weight ratio of 2-4:1.

[0032] In some embodiments of the present invention, the stabilizer is at least one of a calcium zinc composite stabilizer, a potassium zinc composite stabilizer, hydrotalcite, and dibutyltin dilaurate.

[0033] In some embodiments of the present invention, the stabilizer is composed of a calcium-zinc composite stabilizer and hydrotalcite in a weight ratio of 3-5:1-2.

[0034] In some embodiments of the present invention, the synergist is at least one of dioctyl adipate and hydrogenated styrene-butadiene block copolymer.

[0035] In some embodiments of the present invention, each part of the synergist comprises the following raw materials in parts by weight: 6-9 parts of dioctyl adipate (DOA) and 1-4 parts of hydrogenated styrene-butadiene block copolymer (SEBS).

[0036] In some embodiments of the present invention, the mildew inhibitor is at least one of nano-zinc oxide-loaded montmorillonite, copper zinc pyrithione, and N-octyl-4-isothiazoline-3-one.

[0037] In some embodiments of the present invention, the mildew inhibitor comprises nano-zinc oxide-loaded montmorillonite and copper zinc pyrithione in a weight ratio of 2-4:1-2. The content of zinc oxide in the nano-zinc oxide-loaded montmorillonite is 6-10%.

[0038] In some embodiments of the present invention, a method for preparing a wear-resistant and cold-resistant PVC composite material comprises the following steps:

[0039] (1) Add PVC resin powder into a blender and stir, then add plasticizer and continue stirring until the plasticizer and PVC resin powder are evenly mixed to obtain material A;

[0040] (2) MBS, fluorosilicone resin, synergist, styrene-acrylonitrile-glycidyl methacrylate copolymer, acrylic copolymer, nano-silica, stabilizer and mildew inhibitor were added to material A, and the mixture was stirred at a stirring speed of 400-800 r / min for 15-25 min to uniformly mix the raw materials to obtain material B;

[0041] (3) Add material B to an internal mixer and mix at a temperature of 150-160°C, a rotor speed of 40-80 r / min, and a mixing time of 10-20 min to obtain material C;

[0042] (4) Material C is placed in an extruder for extrusion granulation, and strip materials are extruded through the die head of the extruder, and then passed through a water-cooling or air-cooling granulation system to prepare film composite granules for PVC wood flooring.

[0043] (5) The composite pellets of the PVC wood flooring film are calendered into a film by a calendering mechanism, and then placed at a temperature of 45-55° C. for 40-56 hours to obtain the PVC wood flooring film; the PVC wood flooring film is then cut and vacuum-packed for later use.

[0044] In some embodiments of the present invention, in step (1), PVC resin powder is added to a mixer and stirred at a speed of 500-800 r / min for 5-15 min, and then a plasticizer is added and stirred at a speed of 300-600 r / min for 10-20 min to fully mix the plasticizer and PVC resin powder to obtain material A.

[0045] In some embodiments of the present invention, in step (3), a twin-screw extruder is used for extrusion granulation, and the temperatures of each zone of the twin-screw extruder are: zone 1 temperature: 165-175°C, zone 2 temperature: 1750-185°C, zone 3 temperature: 185-195°C, zone 4 temperature: 195-205°C, head temperature: 185-195°C, and the screw speed of the screw extruder is 400-500rpm.

[0046] Furthermore, the preparation method of the wear-resistant and cold-resistant PVC composite material also includes step (5): using a calendering mechanism to calender the PVC wood floor film composite particles into a film, and then placing it at a temperature of 45-55°C for 40-56 hours to obtain the PVC wood floor film; and then cutting and vacuum-packing the PVC wood floor film for standby use.

[0047] In the following embodiments of the present invention, the PVC resin powder is PVC resin MP1300L from Tianjin Botian Chemical. The MBS is M711 from Zhongyuan Chemical. The fluorosilicone resin is KX-501 fluorosilicone resin from Guangzhou Kanglunxi Chemical. The styrene-acrylonitrile-methacrylate glycidyl ester copolymer is Jiayirong SAG-002 styrene-acrylonitrile-glycidyl methacrylate copolymer. The acrylic ester copolymer used was Hubei Jusheng JS1870 acrylic ester copolymer. The hydrogenated styrene-butadiene block copolymer used was Baling Petrochemical's hydrogenated styrene-butadiene block copolymer 503T. The epoxidized soybean oil used was Henan Wanshan New Materials' epoxidized soybean oil T-80, CAS No. 8013-07-8.

[0048] Example 1

[0049] In this embodiment, a wear-resistant, cold-resistant and mildew-resistant PVC composite material includes the following raw materials in parts by weight: 95 parts of PVC resin powder, 30 parts of plasticizer, 12 parts of MBS, 6 parts of fluorosilicone resin, 5 parts of styrene-acrylonitrile-glycidyl methacrylate copolymer, 2 parts of acrylic ester copolymer, 3 parts of nano-silica, 5 parts of synergist, 3 parts of stabilizer, and 3 parts of mildew inhibitor.

[0050] Furthermore, the plasticizer is composed of dioctyl terephthalate and epoxy soybean oil in a weight ratio of 3:1.

[0051] Furthermore, each part of the synergist comprises the following raw materials in parts by weight: 3.5 parts of dioctyl adipate and 1.5 parts of hydrogenated styrene-butadiene block copolymer.

[0052] Furthermore, the mildew preventer is composed of nano zinc oxide loaded montmorillonite and copper zinc pyrithione in a weight ratio of 3:1.5. The content of zinc oxide in the nano zinc oxide loaded montmorillonite is 8%.

[0053] In this embodiment, a method for preparing a wear-resistant and cold-resistant PVC composite material includes the following steps:

[0054] (1) Add PVC resin powder into a blender and stir at a speed of 600 r / min for 10 min, then add plasticizer and continue stirring at a speed of 600 r / min for 15 min to fully mix the plasticizer and PVC resin powder to obtain material A;

[0055] (2) MBS, fluorosilicone resin, synergist, styrene-acrylonitrile-glycidyl methacrylate copolymer, acrylic copolymer, nano-silica, stabilizer and mildew inhibitor were added to material A, and the mixture was stirred at a stirring speed of 600 r / min for 20 min to uniformly mix the raw materials to obtain material B;

[0056] (3) Add material B to an internal mixer and mix at a temperature of 155°C, a rotor speed of 50 r / min, and a mixing time of 15 min to obtain material C;

[0057] (4) Material C is placed in an extruder for extrusion granulation, and strip materials are extruded through the die head of the extruder, and then passed through an air-cooled granulation system to prepare film composite granules for PVC wood flooring.

[0058] Furthermore, in step (3), a twin-screw extruder is used for extrusion granulation, and the temperatures of each zone of the twin-screw extruder are: zone 1 temperature: 170°C, zone 2 temperature: 180°C, zone 3 temperature: 190°C, zone 4 temperature: 200°C, head temperature: 190°C, and the screw speed of the screw extruder is 500rpm.

[0059] Example 2

[0060] In this embodiment, a wear-resistant, cold-resistant and mildew-resistant PVC composite material includes the following raw materials in parts by weight: 90 parts of PVC resin powder, 25 parts of plasticizer, 10 parts of MBS, 5 parts of fluorosilicone resin, 4 parts of styrene-acrylonitrile-glycidyl methacrylate copolymer, 2 parts of acrylic ester copolymer, 2.5 parts of nano-silica, 4 parts of synergist, 3 parts of stabilizer, and 1-4 parts of mildew inhibitor.

[0061] Furthermore, the plasticizer is composed of dioctyl terephthalate and epoxy soybean oil in a weight ratio of 2.5:1.

[0062] Furthermore, each part of the synergist comprises the following raw materials in parts by weight: 2.5 parts of dioctyl adipate and 1.5 parts of hydrogenated styrene-butadiene block copolymer.

[0063] Furthermore, the mildew preventer is composed of nano zinc oxide loaded montmorillonite and copper zinc pyrithione in a weight ratio of 3:1.5. The content of zinc oxide in the nano zinc oxide loaded montmorillonite is 8%.

[0064] In this embodiment, a method for preparing a wear-resistant and cold-resistant PVC composite material includes the following steps:

[0065] (1) Add PVC resin powder into a blender and stir at a speed of 500 r / min for 15 min, then add plasticizer and continue stirring at a speed of 400 r / min for 15 min to fully mix the plasticizer and PVC resin powder to obtain material A;

[0066] (2) MBS, fluorosilicone resin, synergist, styrene-acrylonitrile-glycidyl methacrylate copolymer, acrylic ester copolymer, nano-silica, stabilizer and mildew inhibitor were added to material A, and the mixture was stirred at a stirring speed of 500 r / min for 25 min to uniformly mix the raw materials to obtain material B;

[0067] (3) Add material B to an internal mixer and mix at a temperature of 150°C, a rotor speed of 60 r / min, and a mixing time of 120 min to obtain material C;

[0068] (4) Material C is placed in an extruder for extrusion granulation, and strip materials are extruded through the die head of the extruder, and then passed through an air-cooled granulation system to prepare film composite granules for PVC wood flooring.

[0069] Furthermore, in step (3), a twin-screw extruder is used for extrusion granulation, and the temperatures of each zone of the twin-screw extruder are: zone 1 temperature: 165°C, zone 2 temperature: 175°C, zone 3 temperature: 185°C, zone 4 temperature: 195°C, and die head temperature: 185°C. The screw speed of the screw extruder is 500 rpm.

[0070] Example 3

[0071] In this embodiment, a wear-resistant, cold-resistant and mildew-resistant PVC composite material includes the following raw materials in parts by weight: 100 parts of PVC resin powder, 35 parts of plasticizer, 14 parts of MBS, 7 parts of fluorosilicone resin, 6 parts of styrene-acrylonitrile-glycidyl methacrylate copolymer, 4 parts of acrylic ester copolymer, 4 parts of nano-silica, 7 parts of synergist, 4 parts of stabilizer, and 3 parts of mildew inhibitor.

[0072] Furthermore, the plasticizer is composed of dioctyl terephthalate and epoxy soybean oil in a weight ratio of 3:1.

[0073] Furthermore, each part of the synergist comprises the following raw materials in parts by weight: 5 parts of dioctyl adipate and 2 parts of hydrogenated styrene-butadiene block copolymer.

[0074] Furthermore, the mildew preventer is composed of nano zinc oxide loaded montmorillonite and copper zinc pyrithione in a weight ratio of 2: 1. The content of zinc oxide in the nano zinc oxide loaded montmorillonite is 8%.

[0075] In this embodiment, a method for preparing a wear-resistant and cold-resistant PVC composite material includes the following steps:

[0076] (1) Add PVC resin powder into a blender and stir at a speed of 600 r / min for 10 min, then add plasticizer and continue stirring at a speed of 600 r / min for 15 min to fully mix the plasticizer and PVC resin powder to obtain material A;

[0077] (2) MBS, fluorosilicone resin, synergist, styrene-acrylonitrile-glycidyl methacrylate copolymer, acrylic copolymer, nano-silica, stabilizer and mildew inhibitor were added to material A, and the mixture was stirred at a stirring speed of 600 r / min for 20 min to uniformly mix the raw materials to obtain material B;

[0078] (3) Add material B to an internal mixer and mix at a temperature of 155°C, a rotor speed of 50 r / min, and a mixing time of 15 min to obtain material C;

[0079] (4) Material C is placed in an extruder for extrusion granulation, and strip materials are extruded through the die head of the extruder, and then passed through an air-cooled granulation system to prepare film composite granules for PVC wood flooring.

[0080] Furthermore, in step (3), a twin-screw extruder is used for extrusion granulation, and the temperatures of each zone of the twin-screw extruder are: zone 1 temperature: 170°C, zone 2 temperature: 180°C, zone 3 temperature: 190°C, zone 4 temperature: 200°C, head temperature: 190°C, and the screw speed of the screw extruder is 500rpm.

[0081] Comparative Example 1

[0082] The difference between this comparative example and Example 1 is that the PVC composite material provided in this comparative example does not contain fluorosilicone resin, and an equal amount of PVC resin powder is used instead. The rest of this comparative example is the same as Example 1 and will not be repeated here.

[0083] Comparative Example 2

[0084] The difference between this comparative example and Example 1 is that the PVC composite material provided in this comparative example does not contain a synergist, and an equal amount of PVC resin powder is used instead. The rest of this comparative example is the same as Example 1 and will not be repeated here.

[0085] The present invention uses a calendering mechanism to calender the composite granular materials for PVC wood flooring films prepared in Examples 1-3 and Comparative Examples 1-2 into films, and then places them at 55° C. for 40 hours to obtain PVC wood flooring films. The PVC wood flooring films are then cut and vacuum-packaged. The thickness of the PVC wood flooring films is 0.5 mm. Performance tests are then performed, and the test results are shown in the following table:

[0086]

[0087]

[0088] The abrasion resistance test used Taber abrasion, with a 1000r wear treatment, according to ASTM D4060. The tensile strength test followed GB / T1040.1-2006 at a test rate of 50 mm / min. The Izod notched impact strength test followed GB18043-2008 at a temperature of 23°C. The low-temperature flexural test used the following steps: A PVC wood flooring film with a length of 100 mm and a width of 20 mm was taken. Ensure that the surface of the sample is flat, without obvious defects, scratches or bubbles, etc., to ensure the accuracy and reliability of the test results; place the sample in a low-temperature box and pre-cool it at -25℃ for at least 2h to allow the sample to fully reach the test temperature; after pre-cooling, quickly install the sample on the fixture of the bending tester, adjust the bending angle to 180°, and then perform the bending test at a speed of 1 time / min, bending 12 times continuously; during the bending process, carefully observe whether there are cracks, fractures, delamination or other damage on the surface of the sample, and record the state of the sample after each bending; after the test, take the sample out of the low-temperature box and place it at room temperature for 15 minutes to restore it to room temperature, observe the surface of the sample again to check whether there are obvious cracks, fractures or other damage caused by bending at low temperature.

[0089] The PVC wood flooring films prepared in Examples 1-3 and Comparative Examples 1-2 were tested for mildew resistance in accordance with GB / T 24128-2018. The results showed that the 30-day mildew resistance ratings of the PVC wood flooring films prepared in Examples 1-3 and Comparative Examples 1-2 were both 0. The PVC wood flooring films prepared in Examples 1-3 and Comparative Examples 1-2 were tested in accordance with GB18586-2001. The VOC emissions of the PVC wood flooring films prepared in Examples 1-3 and Comparative Examples 1-2 were both less than 20 μg / m 3 , in line with the standard requirements.

[0090] In summary, the wear-resistant and cold-resistant PVC composite material of the present invention uses PVC resin powder and plasticizer as matrix raw materials, and adds plasticizer, MBS, fluorosilicone resin, synergist, styrene-acrylonitrile-glycidyl methacrylate copolymer and other raw materials to compound with PVC resin powder, so that the prepared PVC composite material has wear resistance, cold resistance and mechanical properties, still has good flexibility in low temperature environment, and has good mildew resistance and long service life. It can be used as a protective film on the surface of wooden floors in high traffic and low temperature environments.

[0091] The above specific embodiments are further explanations of the technical solutions and beneficial effects of the present invention, and are not intended to limit the implementation methods. For those skilled in the art, any obvious substitutions that do not depart from the concept of the present invention are within the scope of protection of the present invention.

Claims

1. A wear-resistant and cold-resistant PVC composite material, characterized by: The invention comprises the following raw materials in parts by weight: 90-100 parts of PVC resin powder, 25-35 parts of plasticizer, 8-15 parts of MBS, 4-8 parts of fluorosilicone resin, 3-7 parts of styrene-acrylonitrile-glycidyl methacrylate copolymer, 1-5 parts of acrylic ester copolymer, 2-5 parts of nano silicon dioxide, 3-8 parts of synergist, 2-5 parts of stabilizer and 1-4 parts of mildew inhibitor.

2. The wear-resistant and cold-resistant PVC composite material according to claim 1, characterized in that: The plasticizer is at least one of dioctyl terephthalate and epoxy soybean oil.

3. The wear-resistant and cold-resistant PVC composite material according to claim 1, characterized in that: The plasticizer is composed of dioctyl terephthalate and epoxy soybean oil in a weight ratio of 2-4:

1.

4. The wear-resistant and cold-resistant PVC composite material according to claim 1, characterized in that: The stabilizer is at least one of a calcium-zinc composite stabilizer, a potassium-zinc composite stabilizer, hydrotalcite and dibutyltin dilaurate.

5. The wear-resistant and cold-resistant PVC composite material according to claim 1, characterized in that: The synergist is at least one of dioctyl adipate and hydrogenated styrene-butadiene block copolymer.

6. The wear-resistant and cold-resistant PVC composite material according to claim 1, characterized in that: Each part of the synergist comprises the following raw materials in parts by weight: 2-6 parts of dioctyl adipate and 1-3 parts of hydrogenated styrene-butadiene block copolymer.

7. The wear-resistant and cold-resistant PVC composite material according to claim 1, characterized in that: The mildew preventer is at least one of nano zinc oxide loaded montmorillonite, copper zinc pyrithione and N-octyl-4-isothiazoline-3-one.

8. A method for preparing the wear-resistant and cold-resistant PVC composite material according to any one of claims 1 to 7, characterized in that: The steps include: (1) Add PVC resin powder into a blender and stir, then add plasticizer and continue stirring until the plasticizer and PVC resin powder are evenly mixed to obtain material A; (2) adding MBS, fluorosilicone resin, synergist, styrene-acrylonitrile-glycidyl methacrylate copolymer, acrylic ester copolymer, nano-silica, stabilizer and mildew inhibitor to material A, stirring to uniformly mix the raw materials to obtain material B; (3) Add material B to an internal mixer and mix them to obtain material C. (4) Material C is placed in an extruder for extrusion granulation, and strip materials are extruded through the die head of the extruder, and then passed through a water-cooling or air-cooling granulation system to prepare film composite granules for PVC wood flooring.

9. The method for preparing the wear-resistant and cold-resistant PVC composite material according to claim 8, characterized in that: In step (3), material B is added to an internal mixer for internal mixing at a mixing temperature of 150-160° C., a rotor speed of 40-80 r / min, and a mixing time of 10-20 min to obtain material C.

10. The method for preparing the wear-resistant and cold-resistant PVC composite material according to claim 8, characterized in that: In step (3), a twin-screw extruder is used for melt extrusion, and the temperatures of the zones of the twin-screw extruder are: zone 1 temperature: 140-160°C, zone 2 temperature: 150-170°C, zone 3 temperature: 160-180°C, zone 4 temperature: 170-190°C, zone 5 temperature: 200-220°C, zone 6 temperature: 170-190°C, and the screw speed of the screw extruder is 400-500rpm.

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