CN112322047A - Supercharging pipe with high temperature resistance and preparation process thereof - Google Patents
Supercharging pipe with high temperature resistance and preparation process thereof Download PDFInfo
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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
- C08L83/00—Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon only; Compositions of derivatives of such polymers
- C08L83/04—Polysiloxanes
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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
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2296—Oxides; Hydroxides of metals of zinc
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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
- 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
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four 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
- C08L2312/00—Crosslinking
Abstract
The invention discloses a pressure increasing pipe with high temperature resistance and a preparation process thereof, wherein the pressure increasing pipe is prepared from the following raw materials in parts by weight: methyl vinyl silicone rubber, fluororubber premix, styrene butadiene rubber, hydroxyl silicone oil, nano silicon powder, polymetallic organic siloxane, zinc oxide, fumed silica and the like. The heat-resistant agent is prepared from polymetallic organic siloxane, zinc oxide, fumed silica, tris- (trimethylsilyl) phosphate, zinc aromatic acid and mercaptobenzothiazole, the reasonable combination of the polymetallic organic siloxane and the tris- (trimethylsilyl) phosphate is adopted, the good dispersibility of the components and the compatibility of rubber are utilized, the activity utilization rate of the zinc oxide and the fumed silica is improved, more polysulfide crosslinking bonds of the rubber are promoted by the mercaptobenzothiazole, the endogenous heat generated in the rubber material processing process can be effectively reduced, the stability of the polysulfide crosslinking bonds is improved, and the crosslinking density of vulcanized rubber is kept, so that the heat-resistant performance of the rubber is greatly improved.
Description
Technical Field
The invention relates to the technical field of a booster pipe, in particular to a booster pipe with high temperature resistance and a preparation process thereof.
Background
In recent years, due to the rapid growth of the huge automobile market in China, under the pressure of energy crisis and environmental protection, the rapid development of the electronic technology and the turbocharging technology of the modern automobile engine interacts with the development of the manufacturing technology of the turbocharger, and the rapid development of the turbocharger industry is promoted. Meanwhile, with the improvement of the efficiency of the turbocharger and the development of the matching technology, the turbocharger technology is widely applied to the automobile industry. Based on the common application of the turbocharger to the automobile, the turbocharger pipe matched with the turbocharger is also developed rapidly. The type of the turbocharging rubber tube is different according to different working temperatures of different vehicle types.
When the temperature of the existing turbocharger pipeline, such as an acrylate rubber (AEM)/reinforcing layer/acrylate rubber (AEM) structure, is higher than 180 ℃ when the temperature is higher than the high temperature end, the heat aging phenomenon is easy to occur earlier, and the normal use requirement cannot be met, so that the service life is influenced. Therefore, it is necessary to design a pressure pipe with high temperature resistance and a preparation process thereof.
Disclosure of Invention
Aiming at the situation and overcoming the defects of the prior art, the invention provides a pressure increasing pipe with high temperature resistance and a preparation process thereof, the invention uses heat-resistant agent prepared from polymetallic organic siloxane, zinc oxide, fumed silica, tris- (trimethylsilyl) phosphate, zinc aromatic acid and mercaptobenzothiazole, and utilizes the reasonable combination of the polymetallic organic siloxane and the tris- (trimethylsilyl) phosphate and the good dispersibility of the components and the compatibility of rubber to improve the activity utilization rate of the zinc oxide and the fumed silica, and the mercaptobenzothiazole promotes more polysulfide crosslinking bonds of the rubber, thereby effectively reducing the endogenous heat of the rubber material in the processing process, improving the stability of the polysulfide crosslinking bonds, keeping the crosslinking density of vulcanized rubber and greatly improving the heat resistance of the rubber.
In order to achieve the purpose, the invention provides the following technical scheme: a pressure increasing pipe with high temperature resistance is prepared from the following raw materials in parts by weight: 40-50 parts of methyl vinyl silicone rubber, 20-30 parts of fluororubber premix, 20-30 parts of styrene butadiene rubber, 10-15 parts of hydroxyl silicone oil, 1-2 parts of nano silicon powder, 3-4 parts of polymetallic organosiloxane, 4-6 parts of zinc oxide, 3-7 parts of fumed silica, 1-2 parts of tri- (trimethylsilyl) phosphate, 1-2 parts of zinc aromatic acid, 2-3 parts of mercaptobenzothiazole, 1-2 parts of flame retardant, 1-2 parts of vulcanizing agent, 1-2 parts of anti-aging agent, 1-2 parts of crosslinking assistant and 1-2 parts of antioxidant.
Preferably, the preparation method of the fluororubber premix comprises the steps of firstly melting bisphenol AF and a vulcanization accelerator BPP in a stainless steel melting tank with stirring according to the ratio of 3:1, discharging the molten mixture to a stainless steel receiving disc, naturally cooling the stainless steel receiving disc at normal temperature to obtain colorless or yellowish transparent blocky solid, crushing the obtained blocky solid by using a crusher to obtain white powder with the particle size of 1-5 mu m, then fully mixing the white powder and fluororubber raw rubber by using an internal mixer to obtain an L2 masterbatch, adding the L2 masterbatch into an internal rubber mixing mill for plastication at one time, sequentially adding barium sulfate, PFPE derivatives and fatty alcohol into the internal rubber mixing mill according to the ratio of 4:2:1, and further plastifying to obtain the fluororubber premix.
Preferably, the flame retardant is one or more of halogenated phosphate, nitrogen-based flame retardant, aluminum hydroxide, monoammonium phosphate, ammonium chloride, hexabromocyclododecane, triphenyl phosphate, zinc borate and ammonium polyphosphate.
Preferably, the vulcanizing agent is one or more of sulfur, zinc oxide and tetramethylthiuram disulfide.
A preparation process of a pressure pipe with high temperature resistance comprises the following steps:
step S1, preparing materials: weighing the components in parts by weight for later use;
step S2, preparing a heat-resistant agent: heating the temperature of a toluene reaction kettle material liquid containing organic solvent to 60-70 ℃, adding corresponding amount of polymetallic organic siloxane, tri- (trimethylsilyl) phosphate, zinc aromatic acid and mercaptobenzothiazole according to the feeding ratio, continuously stirring and heating to 120-;
step S3, preparing a rubber compound: adding methyl vinyl silicone rubber, fluororubber premix and styrene butadiene rubber into a reaction kettle, heating to 100-120 ℃, mixing, cooling to 70-80 ℃, sequentially adding hydroxyl silicone oil, nano silicon powder, a flame retardant, a vulcanizing agent, an anti-aging agent, a crosslinking assistant and an antioxidant, and keeping the time for 40-50s to obtain rubber compound;
step S4, tube blank manufacturing: mixing the mixing rubber and the heat-resistant agent according to the proportion of 10:1, and adding the mixture into an extruder to prepare a pipe blank;
step S5, vulcanization molding: and (3) preparing the booster pipe by adopting a two-stage vulcanization method.
Preferably, the extrusion temperature of the extruder is 50-70 ℃, 60-80 ℃, 70-90 ℃, 90-100 ℃ and 100-120 ℃ in sequence from the screw to the head.
Preferably, in step S5, the first vulcanization parameter is: the vulcanization temperature is 140 ℃ and 170 ℃, the vulcanization time is 45-50min, and the secondary vulcanization parameters are as follows: the vulcanization temperature is 180 ℃ and 220 ℃, and the vulcanization time is 6-8 h.
The invention has the beneficial effects that:
1. the heat-resistant agent is prepared from polymetallic organic siloxane, zinc oxide, fumed silica, tris- (trimethylsilyl) phosphate, zinc aromatic acid and mercaptobenzothiazole, the reasonable combination of the polymetallic organic siloxane and the tris- (trimethylsilyl) phosphate is adopted, the good dispersibility of the components and the compatibility of rubber are utilized, the activity utilization rate of the zinc oxide and the fumed silica is improved, more polysulfide crosslinking bonds of the rubber are promoted by the mercaptobenzothiazole, the endogenous heat in the rubber material processing process can be effectively reduced, the stability of the polysulfide crosslinking bonds is improved, and the crosslinking density of vulcanized rubber is kept, so that the heat-resistant performance of the rubber is greatly improved;
2. according to the invention, the methyl vinyl silicone rubber, the fluororubber premix and the styrene butadiene rubber are blended, so that the aim of improving the tensile strength can be achieved, and the service life of the mixed rubber is prolonged.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a flow chart of a process for making a plenum of the present invention.
Detailed Description
The following describes the present invention in further detail with reference to fig. 1.
Example 1: as shown in fig. 1, the present invention provides the following technical solutions: a pressure increasing pipe with high temperature resistance is prepared from the following raw materials in parts by weight: 50 parts of methyl vinyl silicone rubber, 30 parts of fluororubber premix, 30 parts of styrene-butadiene rubber, 15 parts of hydroxyl silicone oil, 2 parts of nano silicon powder, 4 parts of polymetallic organic siloxane, 6 parts of zinc oxide, 7 parts of fumed silica, 2 parts of tris- (trimethylsilyl) phosphate, 2 parts of zinc aromatic acid, 3 parts of mercaptobenzothiazole, 2 parts of flame retardant, 2 parts of vulcanizing agent, 2 parts of anti-aging agent, 2 parts of crosslinking assistant and 2 parts of antioxidant.
Preferably, the preparation method of the fluororubber premix comprises the steps of firstly melting bisphenol AF and a vulcanization accelerator BPP in a stainless steel melting tank with stirring according to the ratio of 3:1, discharging to a stainless steel receiving disc after melting, naturally cooling at normal temperature to obtain colorless or yellowish transparent blocky solid, crushing the obtained blocky solid by using a crusher to obtain white powder with the particle size of 1-5 mu m, then fully mixing the white powder and fluororubber by using an internal mixer to obtain an L2 masterbatch, adding the L2 masterbatch into an internal rubber mixer for plastication at one time, sequentially adding barium sulfate, PFPE derivatives and fatty alcohol into the internal rubber mixer according to the ratio of 4:2:1, and further plastifying to obtain the fluororubber premix.
Preferably, the flame retardant is one or more of halogenated phosphate, nitrogen-based flame retardant, aluminum hydroxide, monoammonium phosphate, ammonium chloride, hexabromocyclododecane, triphenyl phosphate, zinc borate and ammonium polyphosphate.
Preferably, the vulcanizing agent is one or more of sulfur, zinc oxide and tetramethylthiuram disulfide.
A preparation process of a pressure pipe with high temperature resistance comprises the following steps:
step S1, preparing materials: weighing the components in parts by weight for later use;
step S2, preparing a heat-resistant agent: heating the temperature of a toluene reaction kettle material liquid containing organic solvent to 60-70 ℃, adding corresponding amount of polymetallic organic siloxane, tri- (trimethylsilyl) phosphate, zinc aromatic acid and mercaptobenzothiazole according to the feeding ratio, continuously stirring and heating to 120-;
step S3, preparing a rubber compound: adding methyl vinyl silicone rubber, fluororubber premix and styrene butadiene rubber into a reaction kettle, heating to 100-120 ℃, mixing, cooling to 70-80 ℃, sequentially adding hydroxyl silicone oil, nano silicon powder, a flame retardant, a vulcanizing agent, an anti-aging agent, a crosslinking assistant and an antioxidant, and keeping the time for 40-50s to obtain rubber compound;
step S4, tube blank manufacturing: mixing the mixing rubber and the heat-resistant agent according to the proportion of 10:1, and adding the mixture into an extruder to prepare a pipe blank;
step S5, vulcanization molding: and (3) preparing the booster pipe by adopting a two-stage vulcanization method.
Preferably, the extrusion temperature of the extruder is 50-70 ℃, 60-80 ℃, 70-90 ℃, 90-100 ℃ and 100-120 ℃ in sequence from the screw to the head.
Preferably, the first stage vulcanization parameters in step S5 are: the vulcanization temperature is 140 ℃ and 170 ℃, the vulcanization time is 45-50min, and the secondary vulcanization parameters are as follows: the vulcanization temperature is 180 ℃ and 220 ℃, and the vulcanization time is 6-8 h.
Example 2: as shown in fig. 1, the present invention provides the following technical solutions: a pressure increasing pipe with high temperature resistance is prepared from the following raw materials in parts by weight: 40 parts of methyl vinyl silicone rubber, 20 parts of fluororubber premix, 20 parts of styrene-butadiene rubber, 10 parts of hydroxyl silicone oil, 1 part of nano silicon powder, 3 parts of polymetallic organic siloxane, 4 parts of zinc oxide, 3 parts of fumed silica, 1 part of tris- (trimethylsilyl) phosphate, 1 part of zinc aromatic acid, 2 parts of mercaptobenzothiazole, 1 part of flame retardant, 1 part of vulcanizing agent, 1 part of anti-aging agent, 1 part of crosslinking assistant and 1 part of antioxidant.
Preferably, the preparation method of the fluororubber premix comprises the steps of firstly melting bisphenol AF and a vulcanization accelerator BPP in a stainless steel melting tank with stirring according to the ratio of 3:1, discharging to a stainless steel receiving disc after melting, naturally cooling at normal temperature to obtain colorless or yellowish transparent blocky solid, crushing the obtained blocky solid by using a crusher to obtain white powder with the particle size of 1-5 mu m, then fully mixing the white powder and fluororubber by using an internal mixer to obtain an L2 masterbatch, adding the L2 masterbatch into an internal rubber mixer for plastication at one time, sequentially adding barium sulfate, PFPE derivatives and fatty alcohol into the internal rubber mixer according to the ratio of 4:2:1, and further plastifying to obtain the fluororubber premix.
Preferably, the flame retardant is one or more of halogenated phosphate, nitrogen-based flame retardant, aluminum hydroxide, monoammonium phosphate, ammonium chloride, hexabromocyclododecane, triphenyl phosphate, zinc borate and ammonium polyphosphate.
Preferably, the vulcanizing agent is one or more of sulfur, zinc oxide and tetramethylthiuram disulfide.
A preparation process of a pressure pipe with high temperature resistance comprises the following steps:
step S1, preparing materials: weighing the components in parts by weight for later use;
step S2, preparing a heat-resistant agent: heating the temperature of a toluene reaction kettle material liquid containing organic solvent to 60-70 ℃, adding corresponding amount of polymetallic organic siloxane, tri- (trimethylsilyl) phosphate, zinc aromatic acid and mercaptobenzothiazole according to the feeding ratio, continuously stirring and heating to 120-;
step S3, preparing a rubber compound: adding methyl vinyl silicone rubber, fluororubber premix and styrene butadiene rubber into a reaction kettle, heating to 100-120 ℃, mixing, cooling to 70-80 ℃, sequentially adding hydroxyl silicone oil, nano silicon powder, a flame retardant, a vulcanizing agent, an anti-aging agent, a crosslinking assistant and an antioxidant, and keeping the time for 40-50s to obtain rubber compound;
step S4, tube blank manufacturing: mixing the mixing rubber and the heat-resistant agent according to the proportion of 10:1, and adding the mixture into an extruder to prepare a pipe blank;
step S5, vulcanization molding: and (3) preparing the booster pipe by adopting a two-stage vulcanization method.
Preferably, the extrusion temperature of the extruder is 50-70 ℃, 60-80 ℃, 70-90 ℃, 90-100 ℃ and 100-120 ℃ in sequence from the screw to the head.
Preferably, the first stage vulcanization parameters in step S5 are: the vulcanization temperature is 140 ℃ and 170 ℃, the vulcanization time is 45-50min, and the secondary vulcanization parameters are as follows: the vulcanization temperature is 180 ℃ and 220 ℃, and the vulcanization time is 6-8 h.
The invention has the beneficial effects that:
1. the heat-resistant agent is prepared from polymetallic organic siloxane, zinc oxide, fumed silica, tris- (trimethylsilyl) phosphate, zinc aromatic acid and mercaptobenzothiazole, the reasonable combination of the polymetallic organic siloxane and the tris- (trimethylsilyl) phosphate is adopted, the good dispersibility of the components and the compatibility of rubber are utilized, the activity utilization rate of the zinc oxide and the fumed silica is improved, more polysulfide crosslinking bonds of the rubber are promoted by the mercaptobenzothiazole, the endogenous heat in the rubber material processing process can be effectively reduced, the stability of the polysulfide crosslinking bonds is improved, and the crosslinking density of vulcanized rubber is kept, so that the heat-resistant performance of the rubber is greatly improved;
2. according to the invention, the methyl vinyl silicone rubber, the fluororubber premix and the styrene butadiene rubber are blended, so that the aim of improving the tensile strength can be achieved, and the service life of the mixed rubber is prolonged.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. A pressure inlet pipe with high temperature resistance is characterized in that: the feed is prepared from the following raw materials in parts by weight: 40-50 parts of methyl vinyl silicone rubber, 20-30 parts of fluororubber premix, 20-30 parts of styrene butadiene rubber, 10-15 parts of hydroxyl silicone oil, 1-2 parts of nano silicon powder, 3-4 parts of polymetallic organosiloxane, 4-6 parts of zinc oxide, 3-7 parts of fumed silica, 1-2 parts of tri- (trimethylsilyl) phosphate, 1-2 parts of zinc aromatic acid, 2-3 parts of mercaptobenzothiazole, 1-2 parts of flame retardant, 1-2 parts of vulcanizing agent, 1-2 parts of anti-aging agent, 1-2 parts of crosslinking assistant and 1-2 parts of antioxidant.
2. The booster duct of claim 1, having high temperature resistance, wherein: the preparation method of the fluororubber premix comprises the steps of firstly melting bisphenol AF and a vulcanization accelerator BPP in a stainless steel melting tank with stirring according to the ratio of 3:1, discharging the molten mixture to a stainless steel receiving disc, naturally cooling the stainless steel receiving disc at normal temperature to obtain colorless or yellowish transparent blocky solid, crushing the obtained blocky solid by using a crusher to obtain white powder with the particle size of 1-5 mu m, then fully mixing the white powder and fluororubber by using an internal mixer to obtain L2 masterbatch, adding the L2 masterbatch into an internal rubber mixer for plastication at one time, sequentially adding barium sulfate, PFPE derivatives and fatty alcohol into the internal rubber mixer according to the ratio of 4:2:1, and continuously plastifying to obtain the fluororubber premix.
3. The booster duct of claim 1, having high temperature resistance, wherein: the flame retardant is one or more of halogenated phosphate, nitrogen flame retardant, aluminum hydroxide, monoammonium phosphate, ammonium chloride, hexabromocyclododecane, triphenyl phosphate, zinc borate and ammonium polyphosphate.
4. The booster duct of claim 1, having high temperature resistance, wherein: the vulcanizing agent is one or more of sulfur, zinc oxide and tetramethyl thiuram disulfide.
5. A preparation process of a pressure increasing pipe with high temperature resistance is characterized in that: the method comprises the following steps:
step S1, preparing materials: weighing the components in parts by weight for later use;
step S2, preparing a heat-resistant agent: heating the temperature of a toluene reaction kettle material liquid containing organic solvent to 60-70 ℃, adding corresponding amount of polymetallic organic siloxane, tri- (trimethylsilyl) phosphate, zinc aromatic acid and mercaptobenzothiazole according to the feeding ratio, continuously stirring and heating to 120-;
step S3, preparing a rubber compound: adding methyl vinyl silicone rubber, fluororubber premix and styrene butadiene rubber into a reaction kettle, heating to 100-120 ℃, mixing, cooling to 70-80 ℃, sequentially adding hydroxyl silicone oil, nano silicon powder, a flame retardant, a vulcanizing agent, an anti-aging agent, a crosslinking assistant and an antioxidant, and keeping the time for 40-50s to obtain rubber compound;
step S4, tube blank manufacturing: mixing the mixing rubber and the heat-resistant agent according to the proportion of 10:1, and adding the mixture into an extruder to prepare a pipe blank;
step S5, vulcanization molding: and (3) preparing the booster pipe by adopting a two-stage vulcanization method.
6. The process for preparing the booster pipe with high temperature resistance according to claim 5, wherein the process comprises the following steps: the extrusion temperature of the extruder is 50-70 ℃, 60-80 ℃, 70-90 ℃, 90-100 ℃ and 100-120 ℃ from the screw to the head in sequence.
7. The process for preparing the booster pipe with high temperature resistance according to claim 5, wherein the process comprises the following steps: the first stage vulcanization parameters in the step S5 are: the vulcanization temperature is 140 ℃ and 170 ℃, the vulcanization time is 45-50min, and the secondary vulcanization parameters are as follows: the vulcanization temperature is 180 ℃ and 220 ℃, and the vulcanization time is 6-8 h.
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Application publication date: 20210205 |