CN115386172A - High-performance low-compression-set ethylene propylene diene monomer sealing rubber strip - Google Patents
High-performance low-compression-set ethylene propylene diene monomer sealing rubber strip Download PDFInfo
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- CN115386172A CN115386172A CN202211161449.7A CN202211161449A CN115386172A CN 115386172 A CN115386172 A CN 115386172A CN 202211161449 A CN202211161449 A CN 202211161449A CN 115386172 A CN115386172 A CN 115386172A
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- diene monomer
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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
- 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
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
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- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
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- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Sealing Material Composition (AREA)
Abstract
The invention discloses a high-performance low-compression permanent deformation ethylene propylene diene monomer sealing rubber strip, which relates to the technical field of sealing rubber strips, and specifically comprises high-Mooney ethylene propylene diene monomer rubber, low-Mooney ethylene propylene diene monomer rubber, CZ500R, active light calcium carbonate, zinc oxide, stearic acid, polyethylene glycol, a comprehensive accelerator, sulfur and a moisture absorbent.
Description
Technical Field
The invention relates to the technical field of sealing rubber strips, in particular to a high-performance low-compression permanent deformation ethylene propylene diene monomer sealing rubber strip.
Background
The rubber compound of GB/T24498 standard is suitable for producing sealing rubber strips for doors, windows and curtain walls of buildings, when the rubber compound is produced, white carbon black is adopted as a reinforcing agent, and is powdery, so that fine powder is easy to fly in the adding process, the environment is polluted and waste is caused, in order to remove moisture and other volatile matters in the white carbon black and promote dispersion and permeation between raw silicon rubber and the white carbon black, after the white carbon black and a structure control agent are added, the heat treatment is needed for 1-6 hours at the high temperature of 150-180 ℃, so that the production efficiency of the rubber compound is reduced, and the energy consumption is increased; the rubber sheet cut from the mixing rubber material by the tablet press needs to be cooled to a temperature below 45 ℃ for placing, but the placing time is short, the shape, the size and the like of a rubber product can be changed, the placing time is too long, the rubber material can be frosted, the production process of the mixing rubber is complex, the production period is long, and therefore the high-performance low-compression permanent deformation ethylene propylene diene monomer sealing rubber strip is provided.
Disclosure of Invention
The invention provides a high-performance low-compression permanent deformation ethylene propylene diene monomer sealing rubber strip, which is produced into rubber compound far lower than the GB/T24498 standard through formula optimization, material optimization and process optimization, so as to produce a high-performance sealing product, and solves the problems of complex production process and long production period of the rubber compound provided in the background art.
The invention provides the following technical scheme: a high-performance low-compression permanent deformation ethylene propylene diene monomer sealing rubber strip comprises a rubber system, a reinforcing agent, a filler, an activating agent, stearic acid, polyethylene glycol, a comprehensive accelerator, sulfur and a moisture absorbent, wherein the rubber system is made of high-Mooney ethylene propylene diene monomer and low-Mooney ethylene propylene diene monomer, and the content of the high-Mooney ethylene propylene diene monomer is 60-75 parts; 25-40 parts of low-Mooney ethylene propylene diene monomer; the content of the reinforcing agent is 100-120 parts; the content of the filler is 30-40 parts; 4-6 parts of an activating agent; 0.8-1.2 parts of stearic acid, 1.5-2.5 parts of polyethylene glycol, 3.6-4.2 parts of comprehensive accelerator, 1-1.2 parts of sulfur and 8-10 parts of moisture absorbent.
The reinforcing agent adopts CZ500R ultra-pure carbon black.
The filler is superfine active light calcium carbonate, the surface of the superfine light calcium carbonate is subjected to activation treatment, the filler is matched with a plasticizer for use, the plasticizer is high-flash-point paraffin oil, the flash point of the paraffin oil is more than or equal to 265 ℃, and the viscosity is 11-13 (100 ℃).
The activator is high-activity zinc oxide, and the high-activity zinc oxide is matched with the stearic acid gum for use.
The vulcanization system adopts high-promotion low sulfur.
The comprehensive accelerant needs to be granulated and filtered.
The production adopts A mixing, B mixing and extrusion.
Compared with the prior art, the invention has the following beneficial effects:
1. according to the high-performance low-compression permanent deformation ethylene propylene diene monomer sealing rubber strip, two ethylene propylene diene monomers with different Mooney viscosities are used in a rubber system, mixing is easy to achieve uniformly in the A smelting process, extrusion processing is easy, energy consumption can be effectively reduced, and CZ500R ultra-pure carbon black is used as a reinforcing agent in a reinforcing system, so that the compression permanent deformation performance of a product can be obviously improved, and a finer surface of the product can be provided.
2. According to the high-performance low-compression permanent deformation ethylene propylene diene monomer sealing rubber strip, the activation system adopts high-activity zinc oxide and the stearic acid rubber in a matching mode, the high-activity zinc oxide has a larger comparison surface area, the vulcanization depth can be deepened, better compression permanent external deformation can be obtained, the vulcanization system adopts high-speed low sulfur, the selected comprehensive accelerator is subjected to granulation and filtration, the high-activity low-compression permanent deformation ethylene propylene diene monomer sealing rubber strip has the advantages of high activity, uniform and quick mixing, and the vulcanized product has good physical properties and does not frost.
Drawings
FIG. 1 is a schematic view of the production process of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The present invention provides an embodiment: referring to fig. 1, a high-performance low-compression permanent deformation ethylene propylene diene monomer sealant strip includes high-mooney ethylene propylene diene monomer, low-mooney ethylene propylene diene monomer, CZ500R, active light calcium carbonate, zinc oxide, stearic acid, polyethylene glycol, comprehensive accelerator, sulfur and moisture absorbent, and the specific contents of the components in the sealant formulation are as follows: the content of the high-Mooney ethylene propylene diene monomer is 60 to 75 parts; 25-40 parts of low-Mooney ethylene propylene diene monomer; the content of the reinforcing agent is 100-120 parts; the content of the filler is 30-40 parts; the content of the activating agent is 4-6 parts; 0.8-1.2 parts of stearic acid, 1.5-2.5 parts of polyethylene glycol, 3.6-4.2 parts of comprehensive accelerator, 1-1.2 parts of sulfur and 8-10 parts of moisture absorbent.
The rubber system adopts two ethylene propylene diene rubbers with different Mooney viscosities to be used together, the A mixing process is easy to mix uniformly and easy to extrude and process, and the energy consumption can be effectively reduced.
Compared with the common N550 carbon black, the CZ500R ultra-pure carbon black has larger specific surface area (35-48 m/g) and less screen residue (less than or equal to 20 mg/kg), can obviously improve the compression set property of the product and provide a more delicate surface of the product.
The filling and plasticizing system adopts superfine active light calcium carbonate and high flash point paraffin oil, and the surface of the superfine light calcium carbonate is activated and has certain reinforcement; the flash point of the paraffin oil is more than or equal to 265 ℃, the viscosity of the paraffin oil is 12 (100 ℃), the paraffin oil has good compatibility with crude rubber, the paraffin oil does not precipitate, and the cost can be effectively reduced while the physical properties of the material are ensured.
The activation system adopts high-activity zinc oxide and stearic acid glue in a matching mode, and the high-activity zinc oxide has a larger comparative surface area, is beneficial to deepening the vulcanization depth and obtains better compression and permanent external deformation.
The vulcanization system adopts high-promotion low sulfur, the selected comprehensive accelerator is granulated and filtered, the activity is high, the blending is uniform and rapid, and the vulcanized product has good physical properties and does not frost.
And (3) displaying through detection: under the condition of 100 ℃ plus 168h of hot air aging, the compression set of the product is less than or equal to 33.2, which is superior to 35% specified in GB/T24498-2009 sealing rubber strip for building doors and windows curtain wall; the tensile strength is more than or equal to 8.7MPa, the elongation change at break is 35.6 percent, and the tensile strength is superior to 37-39 percent of like products in the industry.
The high-performance low-compression permanent deformation ethylene propylene diene monomer sealing rubber strip comprises the following implementation steps:
smelting A: putting the raw rubber and the small material of the section A into an internal mixer for pressing for 55-65 seconds; adding carbon black, light calcium carbonate and 1/4 of paraffin oil, and pressing for 55-65 seconds. Adding residual paraffin oil, pressing to 105-115 deg.C, raising the temperature of suppository, removing the suppository powder, pressing to 125-130 deg.C, removing the gel at 140-150 deg.C, and tabletting to obtain gel A.
B smelting: cooling the glue A to below 95-105 ℃, coating a roller on an open mill, adding a comprehensive accelerator, a moisture absorbent and the like, turning the glue for 2-2.5 minutes by an automatic glue turning machine after powder is eaten, and then discharging, cooling and hanging the glue to obtain the glue B.
Extruding: and cooling the B glue, performing sampling inspection, extruding by a vacuum extruder and a mouth mold, performing microwave hot air vulcanization molding, cooling, detecting and packaging.
Example 1
The formula of the high-performance low-compression permanent deformation ethylene propylene diene monomer sealing rubber strip comprises the following components: the content of the high-Mooney ethylene propylene diene monomer is 60 parts; 25 parts of low-Mooney ethylene propylene diene monomer; the content of the reinforcing agent is 100 parts; the content of the filler is 30 parts; the content of the activating agent is 4 parts; stearic acid: 0.8 part, polyethylene glycol: 1.5 parts of a comprehensive accelerator: 3.6 parts of sulfur: 1 part, moisture absorbent: 8 parts of the raw materials.
The high-performance low-compression permanent deformation ethylene propylene diene monomer sealing rubber strip comprises the following implementation steps:
smelting A: putting raw rubber and the small material of the section A into an internal mixer for pressing for 55 seconds; carbon black, light calcium and 1/4 of paraffin oil are put into the reactor and pressed for 55 seconds. Adding residual paraffin oil, pressing to 105 deg.C, raising thrombus, removing powder, pressing to 125 deg.C, raising thrombus, exhausting gas, pressing to 140 deg.C, removing glue, and tabletting to obtain glue A.
B smelting: cooling the glue A to below 95 ℃, wrapping a roller on an open mill, adding a comprehensive accelerant, a moisture absorbent and the like, turning the glue for 2 minutes by using an automatic glue turning machine after powder is eaten, and then discharging, cooling and hanging the glue to obtain the glue B.
Extruding: and cooling the glue B, after the glue B is qualified by sampling inspection, extruding the glue through a vacuum extruder and a port die, vulcanizing and shaping the glue through microwave hot air, cooling, detecting and packaging the glue.
Example 2
The formula of the high-performance low-compression permanent deformation ethylene propylene diene monomer sealing rubber strip comprises the following components: the content of the high-Mooney ethylene propylene diene monomer is 65 parts; 30 parts of low-Mooney ethylene propylene diene monomer; the content of the reinforcing agent is 110 parts; the content of the filler is 35 parts; the content of the activating agent is 5 parts; stearic acid: 1 part, polyethylene glycol: 2 parts, comprehensive accelerator: 4 parts, sulfur: 1.1 parts, moisture absorbent: 9 parts.
The high-performance low-compression permanent deformation ethylene propylene diene monomer sealing rubber strip comprises the following implementation steps:
smelting A: putting raw rubber and the small material of the section A into an internal mixer for pressing for 60 seconds; adding carbon black, light calcium and 1/4 of paraffin oil, and pressing for 60 seconds; adding residual paraffin oil, pressing to 110 deg.C, raising thrombus, removing air, pressing to 145 deg.C, and tabletting.
B smelting: cooling the glue A to below 100 ℃, coating a roller on an open mill, adding a comprehensive accelerant, a moisture absorbent and the like, turning the glue for 2.3 minutes by using an automatic glue turning machine after powder feeding is finished, and then discharging, cooling and hanging the glue to obtain the glue B.
Extruding: and cooling the glue B, after the glue B is qualified by sampling inspection, extruding the glue through a vacuum extruder and a port die, vulcanizing and shaping the glue through microwave hot air, cooling, detecting and packaging the glue.
Example 3
The formula of the high-performance low-compression permanent deformation ethylene propylene diene monomer sealing rubber strip is as follows: the content of the high-Mooney ethylene propylene diene monomer is 75 parts; 40 parts of low-Mooney ethylene propylene diene monomer; the content of the reinforcing agent is 120 parts; the content of the filler is 40 parts; the content of the activating agent is 6 parts; 1.2 parts of stearic acid, 2.5 parts of polyethylene glycol, 4.2 parts of comprehensive accelerator, 1.2 parts of sulfur and 10 parts of moisture absorbent.
The high-performance low-compression permanent deformation ethylene propylene diene monomer sealing rubber strip comprises the following steps:
smelting A: putting the raw rubber and the A-section small materials into an internal mixer for pressing for 65 seconds; carbon black, light calcium and 1/4 paraffin oil were charged and pressed for 65 seconds. Adding residual paraffin oil, pressing to 115 deg.C, raising thrombus, removing powder, pressing to 130 deg.C, removing glue, pressing to 150 deg.C, and tabletting to obtain glue A.
B smelting: cooling the glue A to below 105 ℃, coating a roller on an open mill, adding a comprehensive accelerant, a moisture absorbent and the like, turning the glue for 2.5 minutes by using an automatic glue turning machine after powder feeding is finished, and then discharging, cooling and hanging the glue to obtain the glue B.
Extruding: and cooling the glue B, after the glue B is qualified by sampling inspection, extruding the glue through a vacuum extruder and a port die, vulcanizing and shaping the glue through microwave hot air, cooling, detecting and packaging the glue.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. A high-performance low-compression permanent deformation ethylene propylene diene monomer sealing rubber strip comprises a rubber system, a reinforcing agent, a filler, an activator, stearic acid, polyethylene glycol, a comprehensive accelerator, sulfur and a moisture absorbent, and is characterized in that: the rubber system adopts high-Mooney ethylene propylene diene monomer and low-Mooney ethylene propylene diene monomer, and the content of the high-Mooney ethylene propylene diene monomer is 60-75 parts; 25-40 parts of low-Mooney ethylene propylene diene monomer; the content of the reinforcing agent is 100-120 parts; the content of the filler is 30-40 parts; the content of the activating agent is 4-6 parts; 0.8-1.2 parts of stearic acid, 1.5-2.5 parts of polyethylene glycol, 3.6-4.2 parts of comprehensive accelerator, 1-1.2 parts of sulfur and 8-10 parts of moisture absorbent.
2. The ethylene-propylene-diene monomer sealing rubber strip with high performance and low compression set according to claim 1, wherein: the reinforcing agent adopts CZ500R ultra-pure carbon black.
3. The ethylene-propylene-diene monomer sealing rubber strip with high performance and low compression set according to claim 1, wherein: the filler is superfine active light calcium carbonate, the surface of the superfine light calcium carbonate is subjected to activation treatment, the filler is matched with a plasticizer for use, the plasticizer is high-flash-point paraffin oil, the flash point of the paraffin oil is more than or equal to 265 ℃, and the viscosity is 11-13 at 100 ℃.
4. The ethylene-propylene-diene monomer sealing rubber strip with high performance and low compression set according to claim 1, wherein: the activator is high-activity zinc oxide, and the high-activity zinc oxide is matched with the stearic acid gum for use.
5. The ethylene-propylene-diene monomer sealing rubber strip with high performance and low compression set according to claim 1, wherein: the vulcanization system adopts high-promotion low sulfur.
6. The ethylene-propylene-diene monomer sealing rubber strip with high performance and low compression set according to claim 1, wherein: the comprehensive accelerant needs to be granulated and filtered.
7. The ethylene-propylene-diene monomer sealing rubber strip with high performance and low compression set according to claim 1, wherein: the production adopts A smelting, B smelting and extrusion modes.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211161449.7A CN115386172A (en) | 2022-09-23 | 2022-09-23 | High-performance low-compression-set ethylene propylene diene monomer sealing rubber strip |
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| CN202211161449.7A CN115386172A (en) | 2022-09-23 | 2022-09-23 | High-performance low-compression-set ethylene propylene diene monomer sealing rubber strip |
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Cited By (1)
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| CN116063800A (en) * | 2023-02-03 | 2023-05-05 | 六安江淮电机有限公司 | Self-lubricating fluorosilicone rubber sealing ring for motor and preparation method thereof |
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