CN113789013A - Automobile air conditioner rubber tube for conveying R134a refrigerant - Google Patents
Automobile air conditioner rubber tube for conveying R134a refrigerant Download PDFInfo
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- CN113789013A CN113789013A CN202111085750.XA CN202111085750A CN113789013A CN 113789013 A CN113789013 A CN 113789013A CN 202111085750 A CN202111085750 A CN 202111085750A CN 113789013 A CN113789013 A CN 113789013A
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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
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/16—Elastomeric ethene-propene or ethene-propene-diene copolymers, e.g. EPR and EPDM rubbers
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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
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/14—Gas barrier composition
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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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- Chemical Kinetics & Catalysis (AREA)
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Abstract
The invention discloses an automobile air conditioner rubber tube for conveying R134a refrigerant, which relates to the field of rubber tubes and comprises the following components in parts by weight: ethylene propylene diene monomer: 80-150 parts; ethylene-propylene latex: 10-30 parts; silane coupling agent KH 560: 1-5 parts; graphene: 8-15 parts; zinc oxide: 2-8 parts; stearic acid: 0.5-3 parts; an anti-aging agent: 1-3 parts; polyethylene glycol PEG 6000: 1-3 parts; coumarone resin: 1-8 parts; carbon black N660: 80-100 parts of a binder; calcium powder: 10-30 parts; paraffin oil: 10-50 parts; sulfur: 0.5-3 parts; 1-3 parts of an accelerator; antiscorching agent CTP: 0.1 to 1 part, has the advantages of excellent barrier property of R134a refrigerant and low manufacturing cost.
Description
Technical Field
The invention relates to the field of air conditioner rubber pipes, in particular to an automobile air conditioner rubber pipe for conveying R134a refrigerant.
Background
The R134a refrigerant does not destroy the ozone layer completely by the special molecular composition and structure, is approved and recommended by most countries in the world, is also a mainstream environment-friendly refrigerant, is widely applied to various refrigeration equipment at present, and is also a main refrigerant used on an automobile air conditioner. The chemical name of the R134a refrigerant is tetrafluoroethane, the molecular size of the refrigerant is extremely small, and the refrigerant is easy to permeate through a high molecular material such as rubber, so that the refrigerant is lost, and therefore, the conventional rubber tube for an automobile air conditioner for conveying the R134a refrigerant is generally divided into four layers in structural design, namely a nylon layer, a rubber inner layer, a framework layer and a rubber outer layer in sequence from inside to outside. The rubber layer has limited effect of separating gas micromolecules, the nylon layer aims to perform molecular separation effect on R134a refrigerant, the refrigerant is prevented from leaking out through the rubber tube, but the manufacturing difficulty of the traditional automobile air conditioner rubber tube is caused due to incompatibility of nylon and rubber, some expensive chemical additives for improving adhesion between rubber and nylon are required to be added into the rubber inner layer, and in addition, the nylon is not expensive, so that the manufacturing cost of the traditional automobile air conditioner rubber tube is high, and the manufacturing cost of an automobile is increased. In addition, in the use process of the traditional rubber tube for the automobile air conditioner, due to frequent startup and shutdown of the refrigerator, the nylon layer is usually separated from the rubber layer to block a pipeline system, so that the fault of a refrigeration system is caused, and therefore the problem is solved by a new rubber tube.
Disclosure of Invention
The invention aims to provide an automobile air-conditioning rubber tube for conveying R134a refrigerant, which aims to solve the problems that a nylon layer in the existing air-conditioning rubber tube proposed in the background art is easy to fall off from a rubber layer to block a pipeline system, so that a refrigeration system is in failure, and has the advantages of excellent barrier performance of R134a refrigerant and low manufacturing cost.
In order to achieve the purpose, the invention provides the following technical scheme:
an automobile air conditioner rubber tube for conveying R134a refrigerant comprises the following components in parts by weight: ethylene propylene diene monomer: 80-150 parts; ethylene-propylene latex: 10-30 parts; silane coupling agent KH 560: 1-5 parts; graphene: 8-15 parts; zinc oxide: 2-8 parts; stearic acid: 0.5-3 parts; an anti-aging agent: 1-3 parts; polyethylene glycol PEG 6000: 1-3 parts; coumarone resin: 1-8 parts; carbon black N660: 80-100 parts of a binder; calcium powder: 10-30 parts; paraffin oil: 10-50 parts; sulfur: 0.5-3 parts; 1-3 parts of an accelerator; antiscorching agent CTP: 0.1-1 part.
In order to further optimize the present invention, the following technical solutions may be preferably selected:
preferably, the composition comprises the following components in parts by weight: ethylene propylene diene monomer: 100 parts of (A); ethylene-propylene latex: 20 parts of (1); silane coupling agent KH 560: 3 parts of a mixture; graphene: 10 parts of (A); zinc oxide: 5 parts of a mixture; stearic acid: 1 part; an anti-aging agent: 2 parts of (1); polyethylene glycol PEG 6000: 1.5 parts; coumarone resin: 5 parts of a mixture; carbon black N660: 90 parts of a mixture; calcium powder: 20 parts of (1); paraffin oil: 25 revolutions per minute; sulfur: 1 part; 1.5 parts of an accelerator; anti-scorching agent CTP: 0.5 part.
Preferably, the accelerator consists of an accelerator TMTD and an accelerator M, wherein the component ratio of the accelerator TMTD to the accelerator M is 2: 1.
A method for preparing a rubber hose for an automobile air conditioner for conveying R134a refrigerant comprises the following steps:
s1: pre-dispersing, namely firstly, under the stirring operation, sequentially adding a silane coupling agent and graphene into liquid ethylene-propylene latex, continuously stirring for 2 hours after the silane coupling agent and graphene powder completely enter the ethylene-propylene latex, and standing for later use to prepare a pre-dispersion adhesive A;
s2: adjusting the rotating speed of an internal mixer to 28 revolutions per minute, adding the pre-dispersion rubber A and the ethylene propylene diene monomer rubber prepared in the step S1 into the internal mixer, mechanically blending for 5-8 minutes, and then discharging to obtain a co-mixed rubber B of the ethylene propylene diene monomer rubber, the ethylene propylene rubber latex and the graphene;
s3: rubber is discharged, the roller distance of the open mill is adjusted to be less than 1mm, and the roller mixing is adjusted to be 50 ℃; adding the blended rubber B of the ethylene propylene diene monomer, the ethylene propylene rubber latex and the graphene prepared in the step S2, thinly passing for 2-3 times, adjusting the roll moment to be about 8 mm, and placing the sheet for 24 hours for later use;
s4: mixing for the first time, adjusting the rotating speed of an internal mixer to 28 revolutions per minute, then lifting a top bolt, adding a mixed rubber B of the parked ethylene propylene diene monomer rubber, ethylene propylene rubber latex and graphene, zinc oxide, stearic acid, an anti-aging agent, coumarone resin and a polyethylene glycol material, and internally mixing for 2-3 min; then adding carbon black and half of paraffin oil, and refining for 2-3 min; adding calcium powder and the rest paraffin oil, banburying for 4-5 min, removing glue, blanking, cooling, and stopping discharging for 12 hours to obtain a glue material C for the next process;
s5: and (2) two-stage mixing, adjusting the rotating speed of an internal mixer to 25 revolutions per minute, adding the rubber material C, sulfur, an accelerant and an anti-scorching agent after the first-stage mixing, carrying out internal mixing for 2-3min, and then discharging rubber to obtain a finished product, wherein the discharging temperature is not more than 90 ℃.
Preferably, the temperature control of the steps S4 and S5 does not exceed 120 ℃.
Compared with the prior art, the invention has the beneficial effects that:
the air-conditioning pipe rubber is prepared by adding a special material capable of blocking small molecular gases on the basis of the traditional air-conditioning pipe rubber formula and adopting a special processing technique. The rubber tube overcomes the defects of the traditional rubber tube for the automobile air conditioner in terms of structural manufacture, and removes the nylon layer of the inner layer, so that the manufacturing cost of the rubber tube for the automobile air conditioner is reduced, the barrier property of the rubber tube for the R134a refrigerant is excellent, and the national standard requirement is met. At present, the automobile air conditioner rubber tube is put on the market in batches, so that customers have good response and obtain good economic benefits.
Detailed Description
R-134a (1, 1, 1, 2-tetrafluoroethane) is a refrigerant which does not contain chlorine atoms, does not destroy the ozone layer, has good safety performance (nonflammable, non-explosive, non-toxic, non-irritant, non-corrosive), has refrigeration capacity and efficiency very close to those of R-12 (dichlorodifluoromethane, freon), and is considered as an excellent long-term substitute refrigerant. R-134a is the best environmental-friendly substitute for R-12 which is internationally recognized at present. The refrigerant does not destroy the ozone layer completely, is an environment-friendly refrigerant which is approved and recommended by most countries in the world at present, is also a mainstream environment-friendly refrigerant at present, and is widely used for being added in the initial installation and maintenance process of new refrigeration air-conditioning equipment. R134a is very low in toxicity, non-flammable in air, and safe in A1, and is a very safe refrigerant. R-134a is used as the most widely used medium-low temperature environment-friendly refrigerant, and due to the good comprehensive performance of R-134a, the R-134a becomes a very effective and safe R-12 substitute, and is mainly applied to most fields using R12 refrigerant, including: the composite material can be used in refrigeration equipment such as refrigerators, freezers, water dispensers, automobile air conditioners, central air conditioners, dehumidifiers, refrigeration houses, commercial refrigeration, water dispensers, ice cream machines, freezing and condensing units and the like, and can also be applied to aerosol propellants, medical aerosols, pesticide propellants, polymer (plastic) physical foaming agents, magnesium alloy protective gas and the like. R-134a can be widely used as a refrigerant in the industries of automobile air conditioners, refrigerators, central air conditioners, commercial refrigeration and the like, and can be used in the industries of medicines, pesticides, cosmetics and cleaning.
Example 1:
a rubber hose for conveying R134a refrigerant for automobile air conditioners comprises the following components: ethylene propylene diene monomer: 800 g; ethylene-propylene latex: 100g of the total weight of the mixture; silane coupling agent KH 560: 10g of a mixture; graphene: 80g of the total weight of the mixture; zinc oxide: 20g of the total weight of the mixture; stearic acid: 5g of the total weight of the mixture; an anti-aging agent: 10g of a mixture; polyethylene glycol PEG 6000: 10g of a mixture; coumarone resin: 10g of a mixture; carbon black N660: 800 g; calcium powder: 100g of the total weight of the mixture; paraffin oil: 100g of the total weight of the mixture; sulfur: 5g of the total weight of the mixture; 10g of accelerator; antiscorching agent CTP: 1g of the total weight of the composition.
Example 2:
a rubber hose for conveying R134a refrigerant for automobile air conditioners comprises the following components: ethylene propylene diene monomer: 1000 g; ethylene-propylene latex: 200g of the total weight of the mixture; silane coupling agent KH 560: 30g of the total weight of the mixture; graphene: 100g of the total weight of the mixture; zinc oxide: 50g of the total weight of the mixture; stearic acid: 10g of a mixture; an anti-aging agent: 20g of the total weight of the mixture; polyethylene glycol PEG 6000: 15g of the total weight of the mixture; coumarone resin: 20g of the total weight of the mixture; carbon black N660: 900 g; calcium powder: 200g of the total weight of the mixture; paraffin oil: 0g per minute at 25 revolutions; sulfur: 10g of a mixture; 15g of accelerator; antiscorching agent CTP: 5g of the total weight.
Example 3:
a rubber hose for conveying R134a refrigerant for automobile air conditioners comprises the following components: ethylene propylene diene monomer: 1500 g; ethylene-propylene latex: 300g of the total weight of the mixture; silane coupling agent KH 560: 50g of the total weight of the mixture; graphene: 150g of the total weight of the mixture; zinc oxide: 80g of the total weight of the mixture; stearic acid: 30g of the total weight of the mixture; an anti-aging agent: 30g of the total weight of the mixture; polyethylene glycol PEG 6000: 30g of the total weight of the mixture; coumarone resin: 80g of the total weight of the mixture; carbon black N660: 1000 g; calcium powder: 300g of the total weight of the mixture; paraffin oil: 500 g; sulfur: 30g of the total weight of the mixture; 30g of accelerator; antiscorching agent CTP: 10 g.
Ethylene propylene diene monomer: 80-150 parts; ethylene-propylene latex: 10-30 parts; silane coupling agent KH 560: 1-5 parts; graphene: 8-15 parts; zinc oxide: 2-8 parts; stearic acid: 0.5-3 parts; an anti-aging agent: 1-3 parts; polyethylene glycol PEG 6000: 1-3 parts; coumarone resin: 1-8 parts; carbon black N660: 80-100 parts of a binder; calcium powder: 10-30 parts; paraffin oil: 10-50 parts; sulfur: 0.5-3 parts; 1-3 parts of an accelerator; antiscorching agent CTP: 0.1-1 part.
Preferably, the accelerator consists of an accelerator TMTD and an accelerator M, wherein the component ratio of the accelerator TMTD to the accelerator M is 2: 1.
A method for preparing a rubber hose for an automobile air conditioner for conveying R134a refrigerant comprises the following steps:
s1: pre-dispersing, namely firstly, under the stirring operation, sequentially adding a silane coupling agent and graphene into liquid ethylene-propylene latex, continuously stirring for 2 hours after the silane coupling agent and graphene powder completely enter the ethylene-propylene latex, and standing for later use to prepare a pre-dispersion adhesive A;
s2: adjusting the rotating speed of an internal mixer to 28 revolutions per minute, adding the pre-dispersion rubber A and the ethylene propylene diene monomer rubber prepared in the step S1 into the internal mixer, mechanically blending for 5-8 minutes, and then discharging to obtain a co-mixed rubber B of the ethylene propylene diene monomer rubber, the ethylene propylene rubber latex and the graphene;
s3: rubber is discharged, the roller distance of the open mill is adjusted to be less than 1mm, and the roller mixing is adjusted to be 50 ℃; adding the blended rubber B of the ethylene propylene diene monomer, the ethylene propylene rubber latex and the graphene prepared in the step S2, thinly passing for 2-3 times, adjusting the roll moment to be about 8 mm, and placing the sheet for 24 hours for later use;
s4: mixing for the first time, adjusting the rotating speed of an internal mixer to 28, then lifting a top bolt, adding a mixed rubber B of the parked ethylene propylene diene monomer rubber, ethylene propylene rubber latex and graphene, zinc oxide, stearic acid, an anti-aging agent, coumarone resin and a polyethylene glycol material, and internally mixing for 2-3 min; then adding carbon black and half of paraffin oil, and banburying for 2-3 min; adding calcium powder and the rest paraffin oil, banburying for 4-5 min, removing glue, blanking, cooling, standing for 12 hours to prepare a glue material C for the next process;
s5: and (2) two-stage mixing, adjusting the rotating speed of an internal mixer to 25 revolutions per minute, adding the rubber material C, sulfur, an accelerant and an anti-scorching agent after the first-stage mixing, carrying out internal mixing for 2-3min, and then discharging rubber to obtain a finished product, wherein the discharging temperature is not more than 90 ℃.
Wherein the temperature control of the steps S4 and S5 does not exceed 120 ℃.
The product in the embodiment 2 is selected for performance test, and the related performance test results are as follows:
(one) physical properties. According to the GB/T528 test method: hardness: 85 parts by weight; breaking strength: 13 MPa; elongation at break: 220 percent; the tensile set is 10% or less.
And (II) detecting the permeability of the refrigerant. According to QC/T664 standard, the standard requires that the temperature is tested at 100 ℃, and the temperature is not higher than 30Kg/m 2/year, and is actually measured to be 6Kg/m 2/year; far below the standard requirements.
And (III) other detection results are qualified.
The finished rubber tube has been put on the market for 1 year, and the user has a good response.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Claims (5)
1. The rubber hose for the automobile air conditioner for conveying the R134a refrigerant is characterized by comprising the following components in parts by weight: ethylene propylene diene monomer: 80-150 parts; ethylene-propylene latex: 10-30 parts; silane coupling agent KH 560: 1-5 parts; graphene: 8-15 parts; zinc oxide: 2-8 parts; stearic acid: 0.5-3 parts; an anti-aging agent: 1-3 parts; polyethylene glycol PEG 6000: 1-3 parts; coumarone resin: 1-8 parts; carbon black N660: 80-100 parts of a binder; calcium powder: 10-30 parts; paraffin oil: 10-50 parts; sulfur: 0.5-3 parts; 1-3 parts of an accelerator; antiscorching agent CTP: 0.1-1 part.
2. The rubber hose of claim 1, which is used for conveying R134a refrigerant for automobile air conditioners, and is composed of the following components in parts by weight: ethylene propylene diene monomer: 100 parts of (A); ethylene-propylene latex: 20 parts of (1); silane coupling agent KH 560: 3 parts of a mixture; graphene: 10 parts of (A); zinc oxide: 5 parts of a mixture; stearic acid: 1 part; an anti-aging agent: 2 parts of (1); polyethylene glycol PEG 6000: 1.5 parts; coumarone resin: 5 parts of a mixture; carbon black N660: 90 parts of a mixture; calcium powder: 20 parts of (1); paraffin oil: 25 revolutions per minute; sulfur: 1 part; 1.5 parts of an accelerator; antiscorching agent CTP: 0.5 part.
3. The rubber hose of claim 1 or 2, which is used for conveying R134a refrigerant for automobile air conditioners, and is characterized in that: the accelerator consists of an accelerator TMTD and an accelerator M, wherein the component ratio of the accelerator TMTD to the accelerator M is 2: 1.
4. A method for preparing the rubber hose for the automobile air conditioner capable of delivering R134a refrigerant according to claim 1, comprising the following steps:
s1: pre-dispersing, namely firstly, under the stirring operation, sequentially adding a silane coupling agent and graphene into liquid ethylene-propylene latex, continuously stirring for 2 hours after the silane coupling agent and graphene powder completely enter the ethylene-propylene latex, and standing for later use to prepare a pre-dispersion adhesive A;
s2: adjusting the rotating speed of an internal mixer to 28 revolutions per minute, adding the pre-dispersion rubber A and the ethylene propylene diene monomer rubber prepared in the step S1 into the internal mixer, mechanically blending for 5-8 minutes, and then discharging to obtain a co-mixed rubber B of the ethylene propylene diene monomer rubber, the ethylene propylene rubber latex and the graphene;
s3: rubber is discharged, the roller distance of the open mill is adjusted to be less than 1mm, and the roller mixing is adjusted to be 50 ℃; adding the blended rubber B of the ethylene propylene diene monomer, the ethylene propylene rubber latex and the graphene prepared in the step S2, thinly passing for 2-3 times, adjusting the roll moment to be about 8 mm, and placing the sheet for 24 hours for later use;
s4: mixing for the first time, adjusting the rotating speed of an internal mixer to 28 revolutions per minute, then lifting a top bolt, adding a mixed rubber B of the parked ethylene propylene diene monomer rubber, ethylene propylene rubber latex and graphene, zinc oxide, stearic acid, an anti-aging agent, coumarone resin and a polyethylene glycol material, and internally mixing for 2-3 min; then adding carbon black and half of paraffin oil, and banburying for 2-3 min; adding calcium powder and the rest paraffin oil, banburying for 4-5 min, removing glue, blanking, cooling, standing for 12 hours to prepare a glue material C for the next process;
s5: and (3) two-stage mixing, adjusting the rotating speed of an internal mixer to 25 revolutions per minute, adding the rubber material C, sulfur, an accelerator and an anti-scorching agent after the first-stage mixing, carrying out internal mixing for 2-3min, and then carrying out rubber discharge to obtain a finished product, wherein the rubber discharge temperature is not more than 90 ℃.
5. The method for preparing the rubber hose for the air conditioner of the automobile for conveying the R134a refrigerant as claimed in claim 4, wherein the temperature control of the steps S4 and S5 is not more than 120 ℃.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111085750.XA CN113789013A (en) | 2021-09-16 | 2021-09-16 | Automobile air conditioner rubber tube for conveying R134a refrigerant |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111085750.XA CN113789013A (en) | 2021-09-16 | 2021-09-16 | Automobile air conditioner rubber tube for conveying R134a refrigerant |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104194162A (en) * | 2014-08-20 | 2014-12-10 | 太仓荣南密封件科技有限公司 | EPDM (ethylene-propylene-diene monomer) rubber for air conditioners and preparation technique thereof |
| CN105237894A (en) * | 2015-11-18 | 2016-01-13 | 南京七四二五橡塑有限责任公司 | Formula of ethylene propylene diene monomer rubber for rubber layer in rubber tube of air conditioner |
| WO2018130199A1 (en) * | 2017-01-13 | 2018-07-19 | 杭州星庐科技有限公司 | Rubber composite, processing method, rubber tube applying composite, and manufacturing method |
| CN110117396A (en) * | 2019-04-23 | 2019-08-13 | 烟台桑尼橡胶有限公司 | A kind of the high temperature-resistant acid-resistant alkali rubber strip formula and its preparation process of containing graphene |
-
2021
- 2021-09-16 CN CN202111085750.XA patent/CN113789013A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104194162A (en) * | 2014-08-20 | 2014-12-10 | 太仓荣南密封件科技有限公司 | EPDM (ethylene-propylene-diene monomer) rubber for air conditioners and preparation technique thereof |
| CN105237894A (en) * | 2015-11-18 | 2016-01-13 | 南京七四二五橡塑有限责任公司 | Formula of ethylene propylene diene monomer rubber for rubber layer in rubber tube of air conditioner |
| WO2018130199A1 (en) * | 2017-01-13 | 2018-07-19 | 杭州星庐科技有限公司 | Rubber composite, processing method, rubber tube applying composite, and manufacturing method |
| CN110117396A (en) * | 2019-04-23 | 2019-08-13 | 烟台桑尼橡胶有限公司 | A kind of the high temperature-resistant acid-resistant alkali rubber strip formula and its preparation process of containing graphene |
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