CN110885511A - Oil-resistant hose and preparation method thereof - Google Patents
Oil-resistant hose and preparation method thereof Download PDFInfo
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- CN110885511A CN110885511A CN201911244330.4A CN201911244330A CN110885511A CN 110885511 A CN110885511 A CN 110885511A CN 201911244330 A CN201911244330 A CN 201911244330A CN 110885511 A CN110885511 A CN 110885511A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L27/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers
- C08L27/02—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L27/04—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment containing chlorine atoms
- C08L27/06—Homopolymers or copolymers of vinyl chloride
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/265—Calcium, strontium or barium carbonate
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/014—Additives containing two or more different additives of the same subgroup in C08K
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/18—Applications used for pipes
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/14—Polymer mixtures characterised by other features containing polymeric additives characterised by shape
- C08L2205/16—Fibres; Fibrils
Abstract
The invention discloses an oil-resistant hose and a preparation method thereof, relates to the technical field of hose production and processing, and solves the problem that the oil-resistant hose is easy to damage due to the fact that the whole structure is damaged when the oil-resistant hose is subjected to severe temperature change. An oil-resistant hose comprises the following components in parts by weight: 100 parts of PVC resin powder; 30-80 parts of pentaerythritol tetraester; 72581.5-3 parts of an environment-friendly calcium zinc stabilizer; 1-2 parts of a processing aid P551A 1; 0-50 parts of nano calcium carbonate; 0.2-0.6 part of monoglyceride; 0.1-0.5 part of oxidized polyethylene wax; 0.15-0.3 part of antioxidant. When the oil-resistant hose is subjected to severe temperature change, the whole structure of the oil-resistant hose can keep good stability, is not easy to damage, has a good application effect, and is low in cost, good in processing performance and simple in formula.
Description
Technical Field
The invention relates to the technical field of hose production and processing, in particular to an oil-resistant hose and a preparation method thereof.
Background
The main component of PVC is polyvinyl chloride, which is a synthetic material that is popular, popular and widely used in the world, the global usage amount of the PVC is the second highest among various synthetic materials, and the oil-resistant hose is a novel pipe material and is an important part in modern industry.
The invention discloses a PVC hose formula with good oil resistance in a Chinese patent with publication number CN109161124A, which comprises the following raw materials in parts by weight: the composition comprises the following raw materials in parts by weight: 95-100 parts of PVC resin, 1-3 parts of dibutyltin laurate, 0.1-0.2 part of barium stearate, 0.4-0.6 part of cadmium stearate, 8-10 parts of dioctyl adipate, 10-15 parts of nitrile rubber, 4-6 parts of epoxidized soybean oil and 22-25 parts of tricresyl phosphate.
In the above application documents, cadmium stearate can be used as a stabilizer in the present invention, and dioctyl adipate can be added to improve the low temperature performance of the hose, so as to improve the service life of the PVC hose in an oily environment, but when the oil-resistant hose is subjected to a severe temperature change in the using process, the hose is likely to cause dissolution, swelling, cracking, deformation or reduction of physical properties, the overall structure is likely to be damaged, and further damage may occur, so a new scheme needs to be proposed to solve the above problems.
Disclosure of Invention
Aiming at the problem that the oil-resistant hose is easy to damage due to the fact that the whole structure of the oil-resistant hose is damaged due to severe temperature change in the prior art, the invention aims to provide the oil-resistant hose to solve the technical problem, and the oil-resistant hose has good temperature change resistance, can keep good stability in the using process, is not easy to damage in the whole process, and is low in cost, good in processing performance and simple in formula.
In order to achieve the first purpose, the invention provides the following technical scheme:
an oil-resistant hose comprises the following components in parts by weight:
100 parts of PVC resin powder;
30-80 parts of pentaerythritol tetraester;
72581.5-3 parts of an environment-friendly calcium zinc stabilizer;
processing aid P551A1-2 parts;
0-50 parts of nano calcium carbonate;
0.2-0.6 part of monoglyceride;
0.1-0.5 part of oxidized polyethylene wax;
0.15-0.3 part of antioxidant.
By adopting the technical scheme, the pentaerythritol tetraester is a good migration-resistant plasticizer, and has good compatibility with PVC, so that the oil-resistant hose has good vulcanization heat resistance, oil resistance, swelling resistance and migration resistance, and good weather resistance, and when the oil-resistant hose is subjected to severe temperature change in the using process, the whole structure is not easily damaged, and good stability can be maintained. The oxidized polyethylene wax has good chemical stability, good thermal stability and low volatility at high temperature, can play a good role in compounding and synergism when being mixed with pentaerythritol tetraester for use, has good compatibility with other components due to the mutual coupling effect between the oxidized polyethylene wax and the pentaerythritol tetraester, and can greatly improve the overall temperature change resistance of the oil-resistant hose, so that the oil-resistant hose has good overall quality, and is low in cost, good in processability and simple in formula.
The environment-friendly calcium zinc stabilizer 7258 has good thermal stability, light stability, transparency and tinting strength, is a good nontoxic stabilizer, replaces an organic tin stabilizer and a lead salt stabilizer, and has good environment-friendly performance. The processing aid P551A can remarkably promote the PVC plasticizing process, has good compatibility and high molecular weight, has a uniform and porous particle structure, and can ensure that the oil-resistant hose keeps higher structural strength and good temperature change resistance. The nano calcium carbonate has the functions of toughening and reinforcing, and can improve the thermal deformation temperature and the dimensional stability of the oil-resistant hose, so that the oil-resistant hose has good structural strength and is not easy to damage. The monoglyceride has good surface activity, broad-spectrum antibacterial property, high safety and stable performance, and can play a good role in corrosion prevention.
More preferably, the oil-resistant hose further comprises 3-8 parts by weight of a functional additive, wherein the functional additive is prepared by mixing nitrile rubber and vinyl triethoxysilane, and the ratio of the nitrile rubber to the vinyl triethoxysilane by weight is (12-15): 1.
by adopting the technical scheme, the nitrile rubber has excellent oil resistance, good compatibility with PVC resin powder and excellent heat resistance and wear resistance, and the vinyltriethoxysilane is a good silane coupling agent and cross-linking agent, so that the better combination effect of the nitrile rubber and the PVC resin can be promoted, and the overall weather resistance, water resistance and temperature change resistance of the oil-resistant hose are greatly improved. Meanwhile, the functional assistant obtained by mixing the nitrile rubber and the vinyltriethoxysilane can improve the stress cracking resistance of the oil-resistant hose, so that the oil-resistant hose has good structural strength and can still maintain good stability in severe temperature change environments.
More preferably, the oil-resistant hose further comprises a whisker filler in an amount of 2-5 parts by weight, and the whisker filler is any one of potassium titanate whisker, aluminum borate whisker, zinc oxide whisker, magnesium sulfate whisker and calcium sulfate whisker.
By adopting the technical scheme, the whiskers are micro-nano short fibers formed by growing high-purity single crystals, and the whisker filler not only can keep good dimensional stability of the oil-resistant hose in the using process, but also has good compatibility and bonding property with other raw materials of various components, so that a good reinforcing and toughening effect can be achieved, and the structural strength, corrosion resistance, wear resistance and temperature change resistance of the oil-resistant hose can be improved.
More preferably, the oil-resistant hose further comprises 4-6 parts by weight of a fiber filler, wherein the fiber filler is any one of glass fiber, fluorine-containing phenolic fiber and polybenzimidazole fiber.
By adopting the technical scheme, the glass fiber has high mechanical strength, good impact resistance, good corrosion resistance and strong temperature and humidity change resistance; the fluorine-containing phenolic fiber has good high temperature resistance, strong flame retardant property and strong integral temperature under specific temperature change; the polybenzimidazole fiber is a typical heterocyclic polymer heat-resistant fiber, has excellent chemical corrosion resistance and good overall temperature change resistance. The fiber filler is added, so that the integral structural strength of the oil-resistant hose can be improved, and the temperature change resistance of the oil-resistant hose can be greatly improved.
More preferably, the antioxidant is any one of zinc dialkyl dithiophosphate, zinc dialkyl dithiocarbamate and N-phenyl- α -naphthylamine.
By adopting the technical scheme, the antioxidant can inhibit the oxidation process of the oil-resistant hose, so that the ageing of the oil-resistant hose is prevented, the service life of the oil-resistant hose is prolonged, the oil-resistant hose also has certain corrosion resistance, and the overall durability of the oil-resistant hose is improved.
The second purpose of the invention is to provide a preparation method of the oil-resistant hose, the oil-resistant hose prepared by the method has good temperature change resistance, can keep good stability in the using process, and is not easy to damage as a whole.
In order to achieve the second purpose, the invention provides the following technical scheme, which comprises the following steps:
step one, blending and extruding, namely fully mixing PVC resin powder, pentaerythritol tetraester, an environment-friendly calcium-zinc stabilizer 7258, a processing aid P551A, nano calcium carbonate, monoglyceride, oxidized polyethylene wax and an antioxidant in parts by weight in a blending machine, and then adding the mixture into an extruder for extrusion molding, wherein the extrusion temperature is 190-;
step two, air compression molding, namely performing air compression molding on the blank under the vacuum pressure of 0.003 to-0.001 MPa, and cooling and solidifying to obtain a pipe;
and step three, vulcanization crosslinking, namely vulcanizing the pipe in a water bath at 40-90 ℃ for 10-24h to finish the crosslinking process to obtain the oil-resistant hose.
By adopting the technical scheme, the raw materials of the components are uniformly mixed in the blender and then are extruded by the extruder to obtain the blank, and then the blank is subjected to air compression molding, so that the overall quality of the oil-resistant hose can be improved, the production rate of defective products is reduced in the processing process, and finally, the oil-resistant hose with stable and good performance can be obtained by vulcanization crosslinking. Meanwhile, the preparation method is simple to operate, pollution generated in the production process is small, the yield of finished products is high, and the whole preparation method has a good application effect.
Further preferably, the PVC resin powder in the first step is modified, and specifically includes the following steps: s1, pouring PVC resin powder in a corresponding weight part into a container, adding 2-4 times of deionized water, 0.02-0.03 times of sodium lignosulphonate and 0.1-0.2 times of sodium dodecyl sulfate, heating to 60-70 ℃, and preserving heat for 0.8-1.2 hours;
s2, adding 0.1-0.3 times of modifier into the container, wherein the modifier is obtained by mixing methyl methacrylate and hexafluorobutyl acrylate according to the mass ratio of (4-7) to 3, heating to 80-90 ℃, and reacting for 10-12 hours;
and S3, finally adding an aluminum sulfate aqueous solution which is 0.8-1 time of the volume of the reaction liquid in the container and has the mass fraction of 0.05-0.08%, stirring for 10-15min, filtering, washing the crude product with ethanol, and drying in vacuum to obtain the modified PVC resin powder.
Through adopting above-mentioned technical scheme, carry out modification treatment to PVC resin powder, introduce fluorine element on making PVC's the skeleton, and the arrangement of fluorine atom at the carbon skeleton skin is very inseparable, not only can improve the holistic ultraviolet ageing resistance of resistant oily hose and chemical corrosion resistance, can also make the holistic temperature variation resistance of resistant oily hose improve greatly, and when receiving violent temperature variation, overall structure is difficult to be destroyed, difficult emergence damage to longer life has.
In summary, compared with the prior art, the invention has the following beneficial effects:
(1) when the pentaerythritol tetraester and the oxidized polyethylene wax are mixed for use, a good compounding synergistic effect can be achieved, the mutual coupling effect between the pentaerythritol tetraester and the oxidized polyethylene wax not only enables the pentaerythritol tetraester and other components to have good compatibility, but also greatly improves the overall temperature change resistance of the oil-resistant hose, when the oil-resistant hose is subjected to severe temperature change in the using process, the overall structure is not easy to damage, good stability can be maintained, the cost is low, the processing performance is good, and the formula is simple;
(2) the nitrile rubber has excellent oil resistance, and the vinyltriethoxysilane can promote the better combination of the nitrile rubber and the PVC resin, greatly improve the overall weather resistance, water resistance and temperature change resistance of the oil-resistant hose, and have good structural strength, so that the nitrile rubber can still maintain good stability in severe temperature change use environments;
(3) the whisker filler and the fiber filler are added, so that the oil-resistant hose has good compatibility and bonding property with other component raw materials, also has good reinforcing and toughening effects, and can improve and improve the structural strength, corrosion resistance, abrasion resistance and temperature change resistance of the oil-resistant hose.
Drawings
FIG. 1 is a process flow diagram of the present invention.
Detailed Description
The invention is described in detail below with reference to the figures and examples.
Example 1: the oil-resistant hose comprises the following components in parts by weight as shown in Table 1, and is prepared by the following steps:
step one, blending and extruding, namely, fully mixing PVC resin powder, pentaerythritol tetraester, an environment-friendly calcium-zinc stabilizer 7258, a processing aid P551A, nano calcium carbonate, monoglyceride, oxidized polyethylene wax and zinc dialkyl dithiophosphate in corresponding parts by weight in a blending machine, and then adding the mixture into an extruder for extrusion molding, wherein the extrusion temperature is 240 ℃, so as to obtain a blank;
step two, performing air compression molding, namely performing air compression molding on the blank under the vacuum pressure of 0.001MPa, and cooling and solidifying to obtain a pipe;
and step three, vulcanization crosslinking, namely vulcanizing the pipe in a water bath at 65 ℃ for 17h to finish the crosslinking process to obtain the oil-resistant hose.
Note: the PVC resin powder obtained in the above steps is purchased from Taibo plastic industry Co., Ltd, the brand number is s-3000, pentaerythritol tetraester is purchased from Swedish Cystotto Co., Ltd, the environment-friendly calcium zinc stabilizer 7258 is purchased from Taizhou co-production chemical industry Co., Ltd, and the processing aid P551A is purchased from Japan Mitsubishi industry.
Example 2: an oil-resistant hose is different from the hose in embodiment 1 in that the hose specifically comprises the following steps:
step one, blending and extruding, namely, fully mixing PVC resin powder, pentaerythritol tetraester, an environment-friendly calcium-zinc stabilizer 7258, a processing aid P551A, nano calcium carbonate, monoglyceride, oxidized polyethylene wax and zinc dialkyl dithiophosphate in corresponding parts by weight in a blending machine, and then adding the mixture into an extruder for extrusion molding, wherein the extrusion temperature is 190 ℃, so as to obtain a blank;
step two, performing air compression molding, namely performing air compression molding on the blank under the vacuum pressure of 0.003MPa, and cooling and solidifying to obtain a pipe;
and step three, vulcanization crosslinking, namely vulcanizing the pipe in a water bath at 40 ℃ for 24 hours to finish the crosslinking process to obtain the oil-resistant hose.
Example 3: an oil-resistant hose is different from the hose in embodiment 1 in that the hose specifically comprises the following steps:
step one, blending and extruding, namely, fully mixing PVC resin powder, pentaerythritol tetraester, an environment-friendly calcium-zinc stabilizer 7258, a processing aid P551A, nano calcium carbonate, monoglyceride, oxidized polyethylene wax and zinc dialkyl dithiophosphate in corresponding parts by weight in a blending machine, and then adding the mixture into an extruder for extrusion molding, wherein the extrusion temperature is 215 ℃, so as to obtain a blank;
step two, air-pressure forming, namely carrying out air-pressure forming on the blank under the vacuum pressure of-0.001 MPa, and cooling and solidifying to obtain a pipe;
and step three, vulcanization crosslinking, namely vulcanizing the pipe in a water bath at 90 ℃ for 10h to finish the crosslinking process to obtain the oil-resistant hose.
Examples 4 to 5: an oil-resistant hose, which is different from example 1 in that each component and the corresponding parts by weight thereof are shown in table 1.
TABLE 1 Components and parts by weight of examples 1-5
Example 6: an oil resistant hose, which is different from example 1 in that zinc dialkyldithiophosphate in the first step is replaced with zinc dialkyldithiocarbamate of equal mass.
Example 7 an oil resistant hose, which is different from example 1 in that zinc dialkyldithiophosphate in the first step is replaced with N-phenyl- α -naphthylamine of an equal mass.
Example 8: an oil-resistant hose is different from that in the embodiment 1, the first step is specifically set as blending extrusion, PVC resin powder, pentaerythritol tetraester, environment-friendly calcium zinc stabilizer 7258, processing aid P551A, nano calcium carbonate, monoglyceride, oxidized polyethylene wax, zinc dialkyl dithiophosphate and 5.5 parts of functional aid are fully mixed in a blender in corresponding parts by weight, and the functional aid is prepared by mixing nitrile rubber and vinyl triethoxysilane in a weight part ratio of 13.5: 1, adding the mixture into an extruder for extrusion molding, wherein the extrusion temperature is 240 ℃, and obtaining a blank.
Example 9: an oil-resistant hose is different from that in the embodiment 8, the first step is specifically configured as blending and extruding, and PVC resin powder, pentaerythritol tetraester, environment-friendly calcium zinc stabilizer 7258, processing aid P551A, nano calcium carbonate, monoglyceride, oxidized polyethylene wax, zinc dialkyl dithiophosphate and 3 parts of functional aid are fully mixed in a blender, wherein the functional aid is prepared by mixing nitrile rubber and vinyl triethoxysilane in a weight ratio of 13.5: 1, adding the mixture into an extruder for extrusion molding, wherein the extrusion temperature is 240 ℃, and obtaining a blank.
Example 10: an oil-resistant hose is different from that in the embodiment 8, the first step is specifically configured as blending and extruding, and PVC resin powder, pentaerythritol tetraester, environment-friendly calcium zinc stabilizer 7258, processing aid P551A, nano calcium carbonate, monoglyceride, oxidized polyethylene wax, zinc dialkyl dithiophosphate and 8 parts of functional aid are fully mixed in a blender, wherein the functional aid is prepared by mixing nitrile rubber and vinyl triethoxysilane in a weight ratio of 13.5: 1, adding the mixture into an extruder for extrusion molding, wherein the extrusion temperature is 240 ℃, and obtaining a blank.
Example 11: an oil-resistant hose is different from that in the embodiment 8, the first step is specifically configured as blending and extruding, and PVC resin powder, pentaerythritol tetraester, environment-friendly calcium zinc stabilizer 7258, processing aid P551A, nano calcium carbonate, monoglyceride, oxidized polyethylene wax, zinc dialkyl dithiophosphate and 5.5 parts of functional aid are fully mixed in a blender in corresponding parts by weight, and the functional aid is prepared by mixing nitrile rubber and vinyl triethoxysilane in a weight ratio of 12: 1, adding the mixture into an extruder for extrusion molding, wherein the extrusion temperature is 240 ℃, and obtaining a blank.
Example 12: an oil-resistant hose is different from that in the embodiment 8, the first step is specifically configured as blending and extruding, and PVC resin powder, pentaerythritol tetraester, environment-friendly calcium zinc stabilizer 7258, processing aid P551A, nano calcium carbonate, monoglyceride, oxidized polyethylene wax, zinc dialkyl dithiophosphate and 5.5 parts of functional aid are fully mixed in a blender in corresponding parts by weight, and the functional aid is prepared by mixing nitrile rubber and vinyl triethoxysilane in a weight ratio of 15: 1, adding the mixture into an extruder for extrusion molding, wherein the extrusion temperature is 240 ℃, and obtaining a blank.
Example 13: an oil-resistant hose is different from that in the embodiment 1, the first step is specifically configured as blending extrusion, wherein PVC resin powder, pentaerythritol tetraester, environment-friendly calcium zinc stabilizer 7258, processing aid P551A, nano calcium carbonate, monoglyceride, oxidized polyethylene wax, zinc dialkyl dithiophosphate and 3.5 parts of whisker filler are fully mixed in a blending machine, the whisker filler is potassium titanate whisker, and then the whisker filler is added into an extruder for extrusion molding, wherein the extrusion temperature is 240 ℃, so that a blank is obtained.
Example 14: an oil-resistant hose is different from that in the embodiment 13, the first step is specifically configured to be blending extrusion, wherein corresponding parts by weight of PVC resin powder, pentaerythritol tetraester, environment-friendly calcium zinc stabilizer 7258, processing aid P551A, nano calcium carbonate, monoglyceride, oxidized polyethylene wax, zinc dialkyl dithiophosphate and 2 parts of whisker filler are fully mixed in a blending machine, the whisker filler is selected from potassium titanate whiskers, and then the whisker filler is added into an extruder for extrusion molding, wherein the extrusion temperature is 240 ℃, so that a blank is obtained.
Example 15: an oil-resistant hose is different from that in the embodiment 13, the first step is specifically configured to be blending extrusion, wherein corresponding parts by weight of PVC resin powder, pentaerythritol tetraester, environment-friendly calcium zinc stabilizer 7258, processing aid P551A, nano calcium carbonate, monoglyceride, oxidized polyethylene wax, zinc dialkyl dithiophosphate and 5 parts of whisker filler are fully mixed in a blending machine, the whisker filler is selected from potassium titanate whiskers, and then the whisker filler is added into an extruder for extrusion molding, wherein the extrusion temperature is 240 ℃, so that a blank is obtained.
Example 16: an oil-resistant hose is different from the hose in embodiment 13 in that the first step is specifically configured as blending extrusion, wherein corresponding parts by weight of PVC resin powder, pentaerythritol tetraester, environment-friendly calcium zinc stabilizer 7258, processing aid P551A, nano calcium carbonate, monoglyceride, oxidized polyethylene wax, zinc dialkyl dithiophosphate and 3.5 parts of whisker filler are fully mixed in a blending machine, the whisker filler is aluminum borate whisker, and then the whisker filler is added into an extruder for extrusion molding, wherein the extrusion temperature is 240 ℃, so that a blank is obtained.
Example 17: an oil-resistant hose is different from the hose in embodiment 13 in that the first step is specifically configured as blending extrusion, wherein corresponding parts by weight of PVC resin powder, pentaerythritol tetraester, environment-friendly calcium zinc stabilizer 7258, processing aid P551A, nano calcium carbonate, monoglyceride, oxidized polyethylene wax, zinc dialkyl dithiophosphate and 3.5 parts of whisker filler are fully mixed in a blending machine, the whisker filler is zinc oxide whisker, and then the whisker filler is added into an extruder for extrusion molding, wherein the extrusion temperature is 240 ℃, so that a blank is obtained.
Example 18: an oil-resistant hose is different from that in the embodiment 13, the first step is specifically configured to be blended and extruded, PVC resin powder, pentaerythritol tetraester, environment-friendly calcium zinc stabilizer 7258, processing aid P551A, nano calcium carbonate, monoglyceride, oxidized polyethylene wax, zinc dialkyl dithiophosphate and 3.5 parts of whisker filler by weight are fully mixed in a blending machine, the whisker filler is magnesium sulfate whisker, and then the whisker filler is added into an extruder for extrusion molding, wherein the extrusion temperature is 240 ℃, so that a blank is obtained.
Example 19: an oil-resistant hose is different from that in the embodiment 13, the first step is specifically configured to be blending extrusion, wherein corresponding parts by weight of PVC resin powder, pentaerythritol tetraester, environment-friendly calcium zinc stabilizer 7258, processing aid P551A, nano calcium carbonate, monoglyceride, oxidized polyethylene wax, zinc dialkyl dithiophosphate and 3.5 parts of whisker filler are fully mixed in a blending machine, the whisker filler is calcium sulfate whisker, and then the whisker filler is added into an extruder for extrusion molding, wherein the extrusion temperature is 240 ℃, so that a blank is obtained.
Example 20: an oil-resistant hose is different from that in the embodiment 1, the first step is specifically configured as blending extrusion, wherein PVC resin powder, pentaerythritol tetraester, environment-friendly calcium zinc stabilizer 7258, processing aid P551A, nano calcium carbonate, monoglyceride, oxidized polyethylene wax, zinc dialkyl dithiophosphate and 5 parts of fiber filler are fully mixed in a blending machine, the fiber filler is glass fiber, and then the mixture is added into an extruder for extrusion molding, wherein the extrusion temperature is 240 ℃, so that a blank is obtained.
Example 21: an oil-resistant hose is different from the hose in embodiment 20 in that the first step is specifically configured as blending and extruding, and the PVC resin powder, pentaerythritol tetraester, environment-friendly calcium zinc stabilizer 7258, processing aid P551A, nano calcium carbonate, monoglyceride, oxidized polyethylene wax, zinc dialkyl dithiophosphate and 4 parts of fiber filler are fully mixed in a blending machine, the fiber filler is glass fiber, and then the mixture is added into an extruder for extrusion molding, wherein the extrusion temperature is 240 ℃, so that a blank is obtained.
Example 22: an oil-resistant hose is different from the hose in embodiment 20 in that the first step is specifically configured as blending and extruding, and the first step is to fully mix PVC resin powder, pentaerythritol tetraester, environment-friendly calcium zinc stabilizer 7258, processing aid P551A, nano calcium carbonate, monoglyceride, oxidized polyethylene wax, zinc dialkyl dithiophosphate and 6 parts of fiber filler in a blending machine, wherein the fiber filler is glass fiber, and then the fiber filler is added into an extruder for extrusion molding, and the extrusion temperature is 240 ℃ to obtain a blank.
Example 23: an oil-resistant hose is different from the hose in embodiment 20 in that the first step is specifically configured as blending and extruding, and the PVC resin powder, pentaerythritol tetraester, environment-friendly calcium zinc stabilizer 7258, processing aid P551A, nano calcium carbonate, monoglyceride, oxidized polyethylene wax, zinc dialkyl dithiophosphate and 5 parts of fiber filler are fully mixed in a blending machine, the fiber filler is fluorine-containing phenolic fiber, and then the fiber filler is added into an extruder for extrusion molding, wherein the extrusion temperature is 240 ℃, so that a blank is obtained.
Example 24: an oil-resistant hose is different from the oil-resistant hose in embodiment 20 in that the first step is specifically configured as blending and extruding, and PVC resin powder, pentaerythritol tetraester, environment-friendly calcium zinc stabilizer 7258, processing aid P551A, nano calcium carbonate, monoglyceride, oxidized polyethylene wax, zinc dialkyl dithiophosphate and 5 parts of fiber filler are fully mixed in a blending machine, the fiber filler is polybenzimidazole fiber, and then the fiber filler is added into the extruding machine for extrusion molding, wherein the extrusion temperature is 240 ℃ to obtain a blank.
Example 25: an oil-resistant hose, which is different from the hose in embodiment 1 in that the PVC resin powder in the first step is modified, and the oil-resistant hose specifically comprises the following steps:
s1, pouring PVC resin powder in a corresponding weight part into a container, adding 3 times of deionized water, 0.025 times of sodium lignosulphonate and 0.15 times of sodium dodecyl sulfate, heating to 65 ℃, and keeping the temperature for 1 h;
s2, adding 0.2 times of modifier into the container, wherein the modifier is prepared by mixing methyl methacrylate and hexafluorobutyl acrylate according to the mass ratio of 5.5:3, heating to 85 ℃, and reacting for 11 hours;
and S3, finally adding 0.9-volume-of-reaction-liquid 0.065 mass-percent aluminum sulfate aqueous solution into the container, stirring for 12.5min, filtering, washing the crude product with ethanol, and drying in vacuum to obtain the modified PVC resin powder.
Example 26: an oil-resistant hose, which is different from the hose in embodiment 1 in that the PVC resin powder in the first step is modified, and the oil-resistant hose specifically comprises the following steps:
s1, pouring PVC resin powder in a corresponding weight part into a container, adding 2 times of deionized water, 0.02 times of sodium lignosulfonate and 0.1 times of sodium dodecyl sulfate, heating to 60 ℃, and keeping the temperature for 1.2 hours;
s2, adding 0.1 times of modifier into the container, wherein the modifier is prepared by mixing methyl methacrylate and hexafluorobutyl acrylate according to the mass ratio of 4:3, heating to 80 ℃, and reacting for 12 hours;
and S3, finally adding an aluminum sulfate aqueous solution which is 0.8 times in volume of the reaction liquid in the container and has the mass fraction of 0.05%, stirring for 10min, filtering, washing the crude product with ethanol, and drying in vacuum to obtain the modified PVC resin powder.
Example 27: an oil-resistant hose, which is different from the hose in embodiment 1 in that the PVC resin powder in the first step is modified, and the oil-resistant hose specifically comprises the following steps:
s1, pouring PVC resin powder in a corresponding weight part into a container, adding 4 times of deionized water, 0.03 times of sodium lignosulfonate and 0.2 times of sodium dodecyl sulfate, heating to 70 ℃, and keeping the temperature for 0.8 h;
s2, adding 0.3 times of modifier into the container, wherein the modifier is prepared by mixing methyl methacrylate and hexafluorobutyl acrylate according to the mass ratio of 7:3, heating to 90 ℃, and reacting for 10 hours;
and S3, finally adding an aluminum sulfate aqueous solution which is 1 time of the volume of the reaction liquid in the container and has the mass fraction of 0.08%, stirring for 15min, filtering, washing the crude product with ethanol, and drying in vacuum to obtain the modified PVC resin powder.
Comparative example 1: an oil-resistant hose is different from that in the embodiment 1, the first step is specifically configured as blending and extruding, wherein PVC resin powder, an environment-friendly calcium-zinc stabilizer 7258, a processing aid P551A, nano calcium carbonate, monoglyceride, oxidized polyethylene wax and zinc dialkyl dithiophosphate in corresponding parts by weight are fully mixed in a blending machine, and then the mixture is added into an extruder for extrusion molding, wherein the extrusion temperature is 240 ℃, so that a blank is obtained.
Comparative example 2: an oil-resistant hose is different from that in the embodiment 1, the first step is specifically configured as blending and extruding, wherein PVC resin powder, pentaerythritol tetraester, environment-friendly calcium zinc stabilizer 7258, processing aid P551A, nano calcium carbonate, monoglyceride and zinc dialkyl dithiophosphate in corresponding parts by weight are fully mixed in a blender, and then the mixture is added into an extruder to be extruded and molded, wherein the extrusion temperature is 240 ℃, so that a blank is obtained.
Comparative example 3: an oil-resistant hose is different from that in the embodiment 1 in that the first step is specifically configured as blending extrusion, wherein PVC resin powder, an environment-friendly calcium-zinc stabilizer 7258, a processing aid P551A, nano calcium carbonate, monoglyceride and zinc dialkyl dithiophosphate in corresponding parts by weight are fully mixed in a blender, and then the mixture is added into an extruder for extrusion molding, wherein the extrusion temperature is 240 ℃, so that a blank is obtained.
Performance testing
Test samples: the oil-resistant hoses obtained in examples 1 to 27 were used as test samples 1 to 27, and the oil-resistant hoses obtained in comparative examples 1 to 3 were used as control samples 1 to 3.
The test method comprises the following steps: when the PVC is subjected to severe external temperature change and the structure of the PVC is destroyed, dehydrochlorination reaction can occur, and HCl can be decomposed and released. Taking the same size of the test samples 1-27 and the same size of the reference samples 1-3, respectively placing the test samples and the reference samples in an oil bath at 170 ℃, placing pH test paper in an oil bath pan, then beginning to cool to-10 ℃, wherein the cooling speed is 2 ℃/min, then rising to 170 ℃, and the rising speed is 3 ℃/min, and recording the color change time corresponding to each sample until the pH test paper begins to change color. At the same time, the tensile strength and elongation at break of the test samples 1 to 27 and the control samples 1 to 3, respectively, were determined according to the standard GB1042-1979 plastic bending test method.
And (3) test results: the test results of the test samples 1 to 27 and the control samples 1 to 3 are shown in Table 2. As can be seen from Table 2, the comparison of the test results of the test samples 1-5 and the comparison samples 1-3 shows that pentaerythritol tetraester and oxidized polyethylene wax can improve the temperature change resistance, tensile strength and elongation at break of the oil-resistant hose, and the pentaerythritol tetraester and the oxidized polyethylene wax can be mixed for use, so that a good compounding synergistic effect can be achieved, and the improvement effect is better. The comparison of the test results of the test samples 6-7 and the test sample 1 can obtain that the antioxidant disclosed by the invention is suitable for preparing the oil-resistant hose, and the obtained oil-resistant hose has good and stable quality. The comparison of the test results of the test samples 8-12 and the test sample 1 can obtain the functional assistant consisting of the nitrile rubber and the vinyltriethoxysilane, so that the temperature change resistance, the tensile strength and the elongation at break of the oil-resistant hose can be greatly improved. The comparison of the test results of the test samples 13-19, the test samples 20-24 and the test sample 1 can be obtained, the temperature change resistance, the tensile strength and the elongation at break of the oil-resistant hose can be improved by adding the whisker filler and the fiber filler, and the whisker filler and the fiber filler disclosed by the invention can be used for preparing the oil-resistant hose, so that the obtained oil-resistant hose has good and stable quality. The comparison of the test results of the test samples 25-27 and the test sample 1 can obtain the PVC resin powder modified, so that the temperature change resistance, the tensile strength and the elongation at break of the oil-resistant hose can be greatly improved, and the overall quality of the oil-resistant hose is greatly improved.
TABLE 2 test results of test samples 1-27 and control samples 1-3
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.
Claims (7)
1. The oil-resistant hose is characterized by comprising the following components in parts by weight:
100 parts of PVC resin powder;
30-80 parts of pentaerythritol tetraester;
72581.5-3 parts of an environment-friendly calcium zinc stabilizer;
1-2 parts of a processing aid P551A 1;
0-50 parts of nano calcium carbonate;
0.2-0.6 part of monoglyceride;
0.1-0.5 part of oxidized polyethylene wax;
0.15-0.3 part of antioxidant.
2. The oil-resistant hose according to claim 1, wherein 3-8 parts by weight of functional additives are further added to the components of the oil-resistant hose, the functional additives are obtained by mixing nitrile rubber and vinyl triethoxysilane, and the weight ratio of the nitrile rubber to the vinyl triethoxysilane is (12-15): 1.
3. the oil resistant hose according to claim 1, wherein 2 to 5 parts by weight of whisker filler is further added to the components of the oil resistant hose, and the whisker filler is any one of potassium titanate whisker, aluminum borate whisker, zinc oxide whisker, magnesium sulfate whisker and calcium sulfate whisker.
4. The oil-resistant hose according to claim 1, wherein 4-6 parts by weight of fibrous filler is added to the components of the oil-resistant hose, and the fibrous filler is any one of glass fiber, fluorine-containing phenolic fiber and polybenzimidazole fiber.
5. The oil resistant hose according to claim 1, wherein the antioxidant is any one of zinc dialkyldithiophosphate, zinc dialkyldithiocarbamate and N-phenyl- α -naphthylamine.
6. The method for preparing the oil-resistant hose according to claim 1, comprising the following steps:
step one, blending and extruding, namely fully mixing PVC resin powder, pentaerythritol tetraester, an environment-friendly calcium-zinc stabilizer 7258, a processing aid P551A, nano calcium carbonate, monoglyceride, oxidized polyethylene wax and an antioxidant in parts by weight in a blending machine, and then adding the mixture into an extruder for extrusion molding, wherein the extrusion temperature is 190-;
step two, air compression molding, namely performing air compression molding on the blank under the vacuum pressure of 0.003 to-0.001 MPa, and cooling and solidifying to obtain a pipe;
and step three, vulcanization crosslinking, namely vulcanizing the pipe in a water bath at 40-90 ℃ for 10-24h to finish the crosslinking process to obtain the oil-resistant hose.
7. The preparation method of the oil-resistant hose according to claim 6, wherein the PVC resin powder in the first step is modified, and the method specifically comprises the following steps:
s1, pouring PVC resin powder in a corresponding weight part into a container, adding 2-4 times of deionized water, 0.02-0.03 times of sodium lignosulphonate and 0.1-0.2 times of sodium dodecyl sulfate, heating to 60-70 ℃, and preserving heat for 0.8-1.2 hours;
s2, adding 0.1-0.3 times of modifier into the container, wherein the modifier is obtained by mixing methyl methacrylate and hexafluorobutyl acrylate according to the mass ratio of (4-7) to 3, heating to 80-90 ℃, and reacting for 10-12 hours;
and S3, finally adding an aluminum sulfate aqueous solution which is 0.8-1 time of the volume of the reaction liquid in the container and has the mass fraction of 0.05-0.08%, stirring for 10-15min, filtering, washing the crude product with ethanol, and drying in vacuum to obtain the modified PVC resin powder.
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