Composition for preparing wear-resistant and temperature-resistant PVC (polyvinyl chloride) hose and preparation method of PVC hose

Abstract

The invention provides a composition for preparing a wear-resistant and temperature-resistant PVC (polyvinyl chloride) hose and a preparation method of the PVC hose, and belongs to the technical field of PVC hose processing. The composition comprises the following components in parts by weight: 100 parts of PVC resin; 1-2 parts of a stabilizer; 30-50 parts of a plasticizer; 2-5 parts of alkyl silicone rubber; 5-10 parts of hydrogenated nitrile rubber; 5-10 parts of methyl vinyl phenyl silicone rubber; 3-5 parts of a dispersant; 0.8 to 1.5 parts of a peroxide crosslinking initiator; 1-3 parts of an assistant crosslinker; 1-2 parts of a crosslinking accelerator; 0.5 to 1.0 part of an antioxidant; and 0.5 to 1.0 part of an anti-aging agent. The PVC hose disclosed by the invention is resistant to high and low temperatures, relatively high in elasticity, relatively good in aging resistance and ultraviolet irradiation resistance, and relatively high in tensile strength.

Description

Technical Field

[0001] The invention relates to the technical field of PVC hose processing, in particular to a wear-resistant and temperature-resistant PVC hose composition and a preparation method of the PVC hose. Background Art

[0002] Polyvinyl chloride materials can be made into hard products, and can also be made into soft products after adding plasticizers. However, the current hoses based on polyvinyl chloride have great deficiencies in high and low temperature resistance, elasticity, and aging resistance. For example, the produced hoses have poor resilience and low temperature resistance, and the plasticizers used in modified PVC at low temperatures are easy to precipitate.

[0003] Chinese patent publication number CN103739987A discloses a formula and preparation method for a PVC soft sealing strip profile, and selects DOP and DOA as plasticizers in the formula. The Chinese patent application number 201110005692.5 discloses a low-temperature resistant, low-DOP precipitation matte medical soft PVC modified material, which is made of the following ingredients: 100 parts of PVC resin powder, which is composed of the following components by weight: 20%-80% of matte resin powder (polymerization degree of 1000-1500, tetrahydrofuran insoluble matter, i.e., gel content of 19.0%-25.0%), 20%-80% of ordinary resin powder (polymerization degree of 1000-1800), 0-5 parts of acrylate copolymer modifier ACR, 20-80 parts of plasticizer DOP, 0.8-3 parts of stabilizer, 0.2-1.5 parts of antioxidant, 1-6 parts of auxiliary stabilizer epoxy soybean oil, and 0.2-0.8 parts of lubricant. The material has excellent low-temperature resistance, low plasticizer precipitation performance, and matte characteristics.

[0004] This type of low-temperature resistant soft products are often used for a long time in an environment below -40°C, and require the addition of a large amount of low-temperature resistant plasticizers DOS or DOA. However, this type of soft products has the disadvantage of reduced product performance due to the precipitation of low-temperature plasticizers, and their wear resistance is poor. Summary of the invention

[0005] The invention adopts a co-crosslinking method of hydrogenated nitrile rubber and methyl vinyl phenyl silicone rubber, so that the high temperature resistance, low temperature resistance and other properties are greatly improved, and the rubber has higher elasticity, better aging resistance and ultraviolet light resistance, and higher tensile strength.

[0006] One of the objects of the present invention is to provide a composition for preparing a wear-resistant and temperature-resistant PVC hose.

[0007] A second object of the present invention is to provide a method for preparing a PVC hose.

[0008] In order to achieve the above-mentioned purpose of the present invention, the following technical solutions are particularly adopted:

[0009] In a first aspect, the present invention provides a composition for preparing a wear-resistant and temperature-resistant PVC hose, comprising the following components in parts by weight: 100 parts of PVC resin; 1-2 parts of stabilizer; 30-50 parts of plasticizer; 2-5 parts of alkyl silicone rubber; 5-10 parts of hydrogenated nitrile rubber; 5-10 parts of methyl vinyl phenyl silicone rubber; 3-5 parts of dispersant; 0.8-1.5 parts of peroxide cross-linking initiator; 1-3 parts of co-cross-linking agent; 1-2 parts of cross-linking accelerator; 0.5-1.0 parts of antioxidant; and 0.5-1.0 parts of anti-aging agent.

[0010] The following is a detailed description of each component:

[0011] There is no particular limitation on the source of the PVC resin, which can be obtained commercially or prepared by methods known in the art (such as suspension polymerization).

[0012] Preferably, the average polymerization degree of the PVC resin is 1000-1300. A general grade of polyvinyl chloride can be used.

[0013] The added amount of PVC resin is 100 parts.

[0014] The stabilizer includes but is not limited to an organotin stabilizer, a calcium zinc stabilizer 167C, etc., and is preferably an organotin stabilizer.

[0015] Preferably, the organotin stabilizer is a methyltin mercaptan stabilizer, and a specific example of the organotin stabilizer is brand YT-181, but it is not limited thereto.

[0016] The amount of stabilizer added is 1-2 parts, for example, 1 part, 1.2 parts, 1.5 parts, 1.6 parts, 1.8 parts, 2 parts, but not limited thereto.

[0017] Preferably, the plasticizer is dioctyl phthalate (DOP).

[0018] The amount of plasticizer added is 30-50 parts, for example, 30 parts, 35 parts, 40 parts, 45 parts, 50 parts, but not limited thereto.

[0019] The alkyl silicone rubber may be a silicone rubber containing an alkyl group known in the art, and specifically may be SIC 6011P, a translucent particle, having good wear resistance and lubricity.

[0020] The addition amount of the alkyl silicone rubber is 2-5 parts, for example, 2 parts, 2.5 parts, 3 parts, 3.5 parts, 4 parts, 4.5 parts, 5 parts, but not limited thereto.

[0021] Hydrogenated nitrile rubber (HNBR or HSN) is a product obtained by hydrogenating and saturating the carbon-carbon double bonds on the molecular chain of nitrile rubber, so it is also called highly saturated nitrile rubber. Specifically, the grade is 2020, the acrylonitrile content is 36%, the Mooney viscosity is 78, and the hydrogenation degree is 91. If the acrylonitrile content is too high, the material is too hard and is not suitable for processing soft pipes. If the acrylonitrile content is too low, its compatibility with polyvinyl chloride becomes poor. The high degree of hydrogenation means that the number of remaining unsaturated double bonds is small. Under the action of the initiator, it is completely cross-linked, thereby improving thermal stability.

[0022] The amount of hydrogenated nitrile rubber added is 5-10 parts, for example, 5 parts, 6 parts, 7 parts, 8 parts, 9 parts, 10 parts, but not limited thereto.

[0023] The methyl vinyl phenyl silicone rubber is a high temperature vulcanized rubber, which is prepared by introducing diphenyl siloxane chain segments (or methyl phenyl siloxane chain segments) into the molecular chain of vinyl silicone rubber.

[0024] Preferably, the phenyl content in methyl vinyl phenyl silicone rubber is 5-10% (phenyl to silicon atomic ratio). Silicone rubber with this phenyl content (low phenyl silicone rubber) has good softness and elasticity, good processing performance and low temperature resistance. If the phenyl content is too high, the rigidity of the silicone rubber molecular chain increases, resulting in processing difficulties and incompatibility with soft PVC.

[0025] The added amount of methyl vinyl phenyl silicone rubber is 5-10 parts, for example, 5 parts, 6 parts, 7 parts, 8 parts, 9 parts, 10 parts, but not limited thereto.

[0026] Preferably, the dispersant is a blend of hydrogenated nitrile rubber and PVC, specifically, the grade PBZ123, with an acrylonitrile content of 44% and a hydrogenation degree of 91. Because this component itself contains a small amount of polyvinyl chloride, it promotes the dispersion of hydrogenated nitrile rubber in polyvinyl chloride resin.

[0027] The added amount of the dispersant is 3-5 parts, for example, 3 parts, 3.5 parts, 4 parts, 4.5 parts, 5 parts, but not limited thereto.

[0028] Peroxide cross-linking initiators include, but are not limited to, dicumyl peroxide (DCP), benzoyl oxide (BPO), dicumyl hydroperoxide (DBHP), etc., preferably DCP.

[0029] The added amount of the peroxide crosslinking initiator is 0.8-1.5 parts, for example, 0.8 parts, 1 parts, 1.2 parts, 1.3 parts, 1.4 parts, 1.5 parts, but not limited thereto.

[0030] The auxiliary cross-linking agent includes, but is not limited to, triallyl isocyanurate (TAIC).

[0031] The amount of the auxiliary cross-linking agent added is 1-3 parts, for example, 1 part, 1.2 parts, 1.5 parts, 1.6 parts, 1.8 parts, 2 parts, 2.5 parts, 3 parts, but not limited thereto.

[0032] The cross-linking accelerator includes but is not limited to zinc oxide, magnesium oxide, etc., preferably zinc oxide.

[0033] The amount of the cross-linking accelerator added is 1-2 parts, for example, 1 part, 1.2 parts, 1.5 parts, 1.6 parts, 1.8 parts, 2 parts, but not limited thereto.

[0034] The antioxidant includes but is not limited to hindered phenol antioxidants, specifically brand 4010NA, and special anti-aging agent for rubber.

[0035] The added amount of the antioxidant is 0.5-1 part, for example, 0.5 part, 0.6 part, 0.8 part, 1.0 part, but not limited thereto.

[0036] The antioxidant includes but is not limited to 1,4-diphenylaminobenzene, N-octyl-phenyl-p-phenylenediamine (abbreviated as antioxidant OPPD), 2,6-N-di-tert-butyl-4-methylphenol (abbreviated as antioxidant 264), etc., preferably 1,4-diphenylaminobenzene, which is used in combination with antioxidant 4010NA to greatly improve the anti-aging and anti-ultraviolet properties of the hose.

[0037] The amount of the anti-aging agent added is 0.5-1 part, for example, 0.5 part, 0.6 part, 0.8 part, 1.0 part, but not limited thereto.

[0038] In some embodiments, the composition for preparing a wear-resistant and temperature-resistant PVC hose comprises the following components in parts by weight: 100 parts of PVC resin; 1-2 parts of stabilizer; 30-50 parts of plasticizer; 2-5 parts of alkyl silicone rubber; 5-10 parts of hydrogenated nitrile rubber; 5-10 parts of methyl vinyl phenyl silicone rubber; 3-5 parts of dispersant; 0.8-1.5 parts of diisopropyl peroxide; 1-3 parts of TAIC; 1-2 parts of zinc oxide; 0.5-1.0 parts of antioxidant; and 0.5-1.0 parts of anti-aging agent.

[0039] In a second aspect, the present invention provides a method for preparing a PVC hose, comprising the following steps: mixing and extruding the above-mentioned composition for preparing a wear-resistant and heat-resistant PVC hose to obtain a PVC hose.

[0040] In some embodiments, the specific steps include:

[0041] (1) PVC resin, stabilizer, plasticizer, auxiliary crosslinking agent (TAIC), alkyl silicone rubber, and dispersant are weighed in proportion, and then stirred in a high-speed mixer at a stirring rate of 1000-1500 r / min, a stirring time of 5-10 minutes, and a mixing temperature of 100-110° C. After the plasticizer and other additives are completely absorbed by the polyvinyl chloride and the materials are evenly mixed, they are placed in a low-speed cooling mixer, cooled and stirred to a temperature of 40-45° C., and the PVC mixture is obtained for standby use;

[0042] (2) weighing hydrogenated nitrile rubber, methyl vinyl phenyl silicone rubber, peroxide crosslinking initiator, crosslinking accelerator (zinc oxide), antioxidant, anti-aging agent, and the PVC mixture prepared in step (1) in proportion, adding them into an internal mixer at a temperature of 120-140° C. for internal mixing for 10-15 min, and taking out the materials;

[0043] (3) The material mixed in step (2) is put into a double roller at a temperature of 110-130° C. to extrude a sheet (about 3 mm thick), and the extruded sheet is directly put into a single screw extruder. The temperature of the single screw extruder is set to 160-180° C. During the pipe extrusion process, the hydrogenated nitrile rubber, the auxiliary crosslinking agent (TAIC), and the methyl vinyl phenyl silicone rubber are extruded and crosslinked under the action of a peroxide crosslinking initiator, thereby extruding a wear-resistant and temperature-resistant PVC hose.

[0044] Beneficial Effects

[0045] (1) The present invention adopts hydrogenated nitrile rubber with appropriate hydrogenation degree under the initiation of peroxide, and uses a crosslinking accelerator and a crosslinking aid to crosslink with methyl vinyl phenyl silicone rubber with a certain phenyl content during the extrusion of the hose, which greatly improves the high temperature resistance, low temperature resistance and wear resistance of the pipe, and at the same time improves the elasticity of the pipe; the presence of alkyl silicone rubber not only plays a lubricating role, but also further improves the wear resistance of the pipe; the mixture of hydrogenated nitrile rubber and PVC is used as a dispersant, and crosslinking is also added during the extrusion of the pipe, which not only improves the strength and elasticity of the pipe, but also promotes the dispersion of hydrogenated nitrile rubber in PVC resin; because the hydrogenated nitrile rubber has a high degree of hydrogenation and a low internal double bond content, it is completely crosslinked during the extrusion of the pipe, thereby improving the aging resistance of the pipe; the coordinated use of antioxidants and anti-aging agents further improves the aging resistance and ultraviolet aging resistance of the pipe.

[0046] (2) The antioxidant and anti-aging agent have a synergistic effect in terms of aging performance, which is better than using only one of them. The reason for the synergy is that the antioxidant of the present invention is preferably an auxiliary agent specifically used for various rubbers and polyvinyl chloride to prevent thermal oxidative aging, while the antioxidant 4010NA has a better effect on the light aging of rubber. The aging of rubber in use includes aging conditions such as heat, oxygen, and light. The combined use of the antioxidant has a strong pertinence to aging in different conditions.

[0047] The present invention has been described in detail above, but the above embodiments are only illustrative in nature and are not intended to limit the present invention. In addition, this article is not limited by any theory described in the above prior art or invention content or the following examples. DETAILED DESCRIPTION

[0048] The present invention is further described below in conjunction with examples. It should be noted that the following examples are provided for illustrative purposes only and do not constitute a limitation on the scope of protection claimed for the present invention.

[0049] Unless otherwise specified, the raw materials, reagents, methods, etc. used in the examples are conventional raw materials, reagents, methods in the art.

[0050] The raw materials involved in the embodiments and comparative examples are as follows:

[0051] PVC resin was purchased from the chlor-alkali plant of Sinopec Qilu Branch, with a brand name of S-1300 and an average degree of polymerization of 1300.

[0052] The organic tin stabilizer is methyl tin mercaptan stabilizer purchased from Yunnan Tin Industry Co., Ltd., brand YT-181.

[0053] DOP was purchased from Qilu Plasticizer Factory.

[0054] Alkyl silicone rubber was purchased from Guangzhou Silicon Carbon New Materials Co., Ltd. with the brand name SIC 6011P.

[0055] Hydrogenated nitrile rubber was purchased from Japan Zeon with a grade of 2020, an acrylonitrile content of 36%, and a hydrogenation degree of 91.

[0056] Methyl vinyl phenyl silicone rubber was purchased from Chengdu Senfa Rubber & Plastic Co., Ltd., with a phenyl content of 10%.

[0057] The dispersant is a blend of hydrogenated nitrile rubber and PVC purchased from Japan Zeon with a brand name of PBZ123, an acrylonitrile content of 44%, and a hydrogenation degree of 91.

[0058] DCP was purchased from Shanghai Reagent Factory.

[0059] Vinyl trisbutyl ketoxime silane was purchased from Hangzhou Jessica Chemical Co., Ltd.

[0060] Zinc oxide was purchased from Tianjin Kelilong Chemical Reagent Co., Ltd.

[0061] The antioxidant was purchased from Jinan Junteng Chemical Co., Ltd. with a brand number of 4010NA.

[0062] The antioxidant was 1,4-diphenylaminobenzene, which was purchased from Hubei Weishi Chemical Reagent Co., Ltd.

[0063] Examples 1-6

[0064] The ingredients of the PVC hose compositions of Examples 1-6 are shown in Table 1.

[0065] The preparation method of the embodiment is:

[0066] (1) PVC resin, organotin stabilizer, DOP, TAIC, alkyl silicone rubber and dispersant are accurately weighed in proportion, and then stirred at high speed in a high-speed mixer at a stirring rate of 1000-1500 r / min for 5-10 minutes until the temperature reaches 100-110° C. After the plasticizer and other additives are completely absorbed by the polyvinyl chloride and the materials are evenly mixed, the materials are discharged into a low-speed cooling stirring mixer and cooled to 40-45° C. to obtain a PVC mixture for standby use.

[0067] (2) Weigh hydrogenated nitrile rubber, methyl vinyl phenyl silicone rubber, DCP, zinc oxide, antioxidant, anti-aging agent and the PVC mixture prepared in step (1) in proportion, add them into an internal mixer at a temperature of 120-140° C. and mix them for 10-15 minutes, and then take out the materials.

[0068] (3) The kneaded material in step (2) is put into a double roller at a temperature of 110-130° C. to extrude a sheet of about 3 mm thick, and the extruded sheet is directly put into a single screw extruder. The temperature of the single screw extruder is set at 160-180° C. During the pipe extrusion process, the hydrogenated nitrile rubber, TAIC, and methyl vinyl phenyl silicone rubber are extruded and cross-linked under the action of DCP (initiator), thereby extruding a PVC hose.

[0069] Table 1

[0070]

[0071] Comparative Examples 1-7

[0072] The ingredients of the PVC hose compositions of Comparative Examples 1-7 are shown in Table 2.

[0073] Compared with Example 4, Comparative Example 1 uses powdered nitrile rubber instead of hydrogenated nitrile rubber, and the other components are the same; Compared with Example 4, Comparative Example 2 does not add dispersant PBZ123, and the other components are the same; Compared with Example 4, Comparative Example 3 uses a mixture of common lubricants calcium stearate and paraffin instead of alkyl silicone rubber, and the other components are the same; Compared with Example 4, Comparative Example 4 does not add peroxide cross-linking initiator, but only uses ordinary blending, and the other components are the same; Compared with Example 4, Comparative Example 5 uses only antioxidant 4010NA, and no anti-aging agent is used; Compared with Example 4, Comparative Example 6 uses only anti-aging agent, and antioxidant 4010NA is not used; Compared with Example 4, Comparative Example 7 uses silane cross-linking, and no peroxide cross-linking is used.

[0074] The preparation method of the comparative example is:

[0075] (1) PVC resin, organotin stabilizer, DOP, TAIC, alkyl silicone rubber / lubricant and other additives are accurately weighed in proportion, and then stirred at high speed in a high-speed mixer at a stirring rate of 1000-1500 r / min for 5-10 minutes until the temperature reaches 100-110°C. After the plasticizer and other additives are completely absorbed by the polyvinyl chloride and the materials are evenly mixed, the materials are discharged into a low-speed cooling stirring mixer and cooled to 40-45°C to obtain a PVC mixture for standby use.

[0076] (2) Weigh the remaining materials and the PVC mixture prepared in step (1) in proportion, add them into an internal mixer at a temperature of 120-140° C., and mix them for 10-15 minutes, then take out the materials.

[0077] (3) The kneaded material in step (2) is placed in a double roller at a temperature of 110-130° C. to extrude a sheet of about 3 mm thick. The extruded sheet is directly placed in a single screw extruder with a set temperature of 160-180° C. to extrude a PVC hose.

[0078] Table 2

[0079]

[0080]

[0081] Performance Testing

[0082] The following tests were performed on the embodiments and comparative examples, and the results are shown in Tables 3 and 4.

[0083] Tensile strength: tested according to national standard GB / T1040-2006;

[0084] Tensile strength change rate: the ratio of the difference between the tensile strength before aging and the tensile strength after aging to the tensile strength before aging, expressed in percentage. The smaller the change rate, the better the material aging performance.

[0085] Elongation at break: Tested in accordance with national standard GB / T1040-2006;

[0086] Change rate of elongation at break: same as above;

[0087] Compression set: Tested according to national standard GB / T7759-1996;

[0088] Low temperature embrittlement temperature: tested according to national standard GB / T5470-2008;

[0089] Wear resistance: The hose is pressed into a 4mm thick sheet and scraped 500 times on a scraper. The smaller the wear mass, the better the wear resistance.

[0090] Table 3 Test results of pipe performance of Examples 1-6 of the present invention

[0091]

[0092]

[0093] Note: The hose is pressed into a 4mm thick sheet and scraped 500 times on a scraper. The smaller the wear mass, the better the wear resistance.

[0094] Table 4 Performance test results of comparative examples 1-7 of the present invention

[0095]

[0096] Note: The hose is pressed into a 4mm thick sheet and scraped 500 times on a scraper. The smaller the wear mass, the better the wear resistance.

[0097] It can be seen from the above data that Comparative Example 1 uses general powdered nitrile rubber, which has a high content of unsaturated double bonds and is not completely cross-linked, so its aging performance is significantly worse than that of the embodiment, and its tensile strength is also reduced; Comparative Example 2 does not add a dispersant, so the material is unevenly dispersed, resulting in a significant decrease in tensile strength, a significant decrease in elongation, and poor wear resistance; Comparative Example 3 uses an ordinary lubricant instead of alkyl silicone rubber, resulting in a significant decrease in wear resistance; Comparative Example 4 is not cross-linked, so the tensile strength and aging performance are reduced, the low temperature resistance is poor, and the wear resistance is reduced; Comparative Examples 5 and 6 use only one antioxidant or antioxidant, and their aging performance is significantly lower than the case where two are used at the same time, and the two have a synergistic effect; Comparative Example 7 has a significant decrease in wear resistance and a decrease in tensile strength because the silane cross-linking is different from the free radical cross-linking initiated by peroxide.

[0098] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that the technical solutions described in the above embodiments may be modified, or some or all of the technical features thereof may be replaced by equivalents, without departing from the spirit and essence of the claims of the present invention; and these modifications or replacements are still within the scope defined by the claims of the present invention.

Claims

1. A composition for preparing a wear-resistant and temperature-resistant PVC hose, characterized in that: The composition comprises the following components in parts by weight: 100 parts of PVC resin; 1-2 parts of stabilizer; 30-50 parts of plasticizer; 2-5 parts of alkyl silicone rubber; 5-10 parts of hydrogenated nitrile rubber; 5-10 parts of methyl vinyl phenyl silicone rubber; 3-5 parts of dispersant; 0.8-1.5 parts of peroxide cross-linking initiator; 1-3 parts of auxiliary cross-linking agent; 1-2 parts of cross-linking accelerator; 0.5-1.0 parts of antioxidant; and 0.5-1.0 parts of anti-aging agent.

2. The composition for preparing a wear-resistant and temperature-resistant PVC hose according to claim 1, characterized in that: The average degree of polymerization of the PVC resin is 1000-1300; Preferably, the stabilizer is an organotin stabilizer, and the organotin stabilizer is a methyltin mercaptan stabilizer; Preferably, the plasticizer is dioctyl phthalate.

3. The composition for preparing a wear-resistant and temperature-resistant PVC hose according to claim 1, characterized in that: The alkyl silicone rubber is SIC 6011P.

4. The composition for preparing a wear-resistant and temperature-resistant PVC hose according to claim 1, characterized in that: The hydrogenated nitrile rubber is Japan Zeon 2020.

5. The composition for preparing a wear-resistant and temperature-resistant PVC hose according to claim 1, characterized in that: The phenyl content in the methyl vinyl phenyl silicone rubber is 5-10%.

6. The composition for preparing a wear-resistant and temperature-resistant PVC hose according to claim 1, characterized in that: The dispersant is a blend of hydrogenated nitrile rubber and PVC, preferably PBZ123.

7. The composition for preparing a wear-resistant and temperature-resistant PVC hose according to claim 1, characterized in that: The peroxide cross-linking initiator is one or more selected from DCP, BPO, and DBHP, preferably DCP.

8. The composition for preparing a wear-resistant and temperature-resistant PVC hose according to claim 1, characterized in that: The auxiliary cross-linking agent is TAIC; Preferably, the cross-linking accelerator is one or more selected from zinc oxide and magnesium oxide, preferably zinc oxide.

9. The composition for preparing a wear-resistant and temperature-resistant PVC hose according to claim 1, characterized in that: The antioxidant is a hindered phenol antioxidant, specifically 4010NA; Preferably, the antioxidant is one or more selected from 1,4-diphenylaminobenzene, N-octyl-phenyl-p-phenylenediamine, and 2,6-N-di-tert-butyl-4-methylphenol, preferably 1,4-diphenylaminobenzene.

10. A method for preparing a PVC hose, characterized in that: The following steps are involved: The composition for preparing a wear-resistant and heat-resistant PVC hose according to any one of claims 1 to 9 is mixed and extruded to obtain a PVC hose; Preferably, the specific steps include: (1) PVC resin, stabilizer, plasticizer, co-crosslinking agent, alkyl silicone rubber, and dispersant are weighed in proportion, and then stirred in a high-speed mixer at a stirring rate of 1000-1500 r / min, a stirring time of 5-10 minutes, and a mixing temperature of 100-110° C. After the materials are uniformly mixed, they are placed in a low-speed cooling mixer, cooled and stirred to a temperature of 40-45° C., and the PVC mixture is obtained for standby use; (2) weighing hydrogenated nitrile rubber, methyl vinyl phenyl silicone rubber, peroxide crosslinking initiator, crosslinking accelerator, antioxidant, anti-aging agent, and the PVC mixture prepared in step (1) in proportion, adding them into an internal mixer at a temperature of 120-140° C. for internal mixing for 10-15 minutes, and taking out the materials; (3) The material mixed in step (2) is put into a double roller at a temperature of 110-130° C. to extrude a sheet, and the extruded sheet is directly put into a single screw extruder, and the temperature of the single screw extruder is set to 160-180° C. During the tube extrusion process, the hydrogenated nitrile rubber, the auxiliary cross-linking agent, and the methyl vinyl phenyl silicone rubber are extruded and cross-linked under the action of a peroxide cross-linking initiator to obtain a PVC hose.

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