CN101230248A - Sealing strip using epdm rubber as host material - Google Patents
Sealing strip using epdm rubber as host material Download PDFInfo
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- CN101230248A CN101230248A CNA2008100001403A CN200810000140A CN101230248A CN 101230248 A CN101230248 A CN 101230248A CN A2008100001403 A CNA2008100001403 A CN A2008100001403A CN 200810000140 A CN200810000140 A CN 200810000140A CN 101230248 A CN101230248 A CN 101230248A
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Abstract
The invention discloses a sealing strip which takes EPDM as the host material and the preparing method, which is characterized in that the composition contains the following constituents (expressed by wt percent): EPDM 26 percent, zinc oxide 1-1.5 percent, stearic acid 1-6 percent, polyethyleneglycol 0.5-1.6 percent, hydrafil 10-32 percent, zinc borate 5-16 percent, orthophosphoric lipid 3-16 percent, black carbon 7-20 percent, paraffin oil 7-21 percent, calcium oxide 2-5 percent, sulfur 0.25-0.5 percent and accelerant 0.65-1.5 percent. The invention ensures the mechanical performance and extrusion performance, is convenient for extrusion, adopts the hydrafil, the zinc borate, and a inflaming retarding system; is the most realistic non-halogen inflaming retarding; can produce a lot of crystal water on the surface of the burning substance; can separate the burning substance from contacting oxygen, and then can perform the inflaming retarding effect; can inhibit the gases produced by the burning substance, accordingly does not produce smog.
Description
Technical field
The present invention relates to rubber item, especially is the sealed strip and the production method thereof of substrate material about a kind of terpolymer EP rubber.
Background technology
The matrix of existing vehicle, subway, equipment, sealed strip for building generally has terpolymer EP rubber (EPDM), chloroprene rubber (CR), polyvinyl chloride (PVC) etc., but their working conditions is not quite similar.As the PVC material: price is low, and technical maturity is simple, but because it exists defectives such as aging resistance is poor, thermo-labile, not environmental protection, developed countries such as European Union, Japan are limited from the use of going up PVC of making laws.And domestic PVC also only limits to require to use on the lower facility.And heat-resisting, the oil resistant of CR, flame resistivity are all excellent, and as crystalline rubber, CR has from reinforcement, can obtain comparatively ideal mechanical property.But the CR glue of domestic production exists a lot of defectives in processing, stores and is subjected to certain limitation.External CR glue price is very expensive.Exist huge price pressure in the use, and contain Cl in the CR glue
-, thereby human body and environment had certain harm, so its use prospect also is under some influence.EPDM is a kind of saturated rubber, has good heat-resisting, anti-weather and electrical property, and moderate, and technical maturity is the preferred material of automobile, boats and ships, railway, electric installation, is present the most widely used sealed strip matrix.
The functions of use of at present domestic EPDM rubber weather strip only limits to sealing, does not also consider other factors such as fire-retardant, environmental protection.In European Union, all rubber items have required not contain nitrosamine, halogen, heavy metal etc., but also fire-retardant this factor are not stipulated.But in the U.S., European Union subway, door and window sealed strip for building are then required by force fire-retardantly, the matrix of these sealed strips mostly is PVC, CR greatly and other thermoplastic elastomers are made, and does not meet existing environmental requirement.Present sealed strip industry exists industry-by-industry and requires skimble-scamble phenomenon, and fire-retardant not environmental protection, environmental protection are not fire-retardant.
Summary of the invention
The objective of the invention is to overcome above defective, provide a kind of with sealed strip and the production method thereof of terpolymer EP rubber as substrate material, making it have existing environmental-protecting performance has flame retardant properties again.
Technical scheme of the present invention realizes in the following manner: a kind of terpolymer EP rubber is the sealed strip of substrate material, and its composition comprises following component (representing with wt.%): terpolymer EP rubber: zinc oxide 26%: 1-1.5%, stearic acid: 1-6%, polyoxyethylene glycol 0.5-1.6%, aluminium hydroxide: 10-32%, zinc borate: 5-16%, phosphoric acid fat: 3-16%, carbon black: 7-20%, paraffin oil: 7-21%, calcium oxide: 2-5%, sulphur: 0.25-0.5%, promotor: 0.65-1.5%.
Above-mentioned promotor is zinc dibutyl dithiocarbamate 0.19%, ziram 0.06%, curing four basic first thiuram 0.03-0.08%, tetra-sulfurized pair five ylidene methyl thiurams 0.08%, thiol group benzene isothiazole 0.12%, N cyclohexyl 2 benzothiazole sulfenamide 0.16-0.97%.
Production method of the present invention may further comprise the steps successively:
1) mixing: terpolymer EP rubber, aluminium hydroxide, zinc borate, phosphoric acid fat, carbon black, paraffin oil, moisture adsorbent, stearic acid, polyoxyethylene glycol, zinc oxide is mixing in milling machine by above prescription, regulate: cooling water pressure 0.4-0.6MPa, air pressure 0.6-0.8MPa, mixing time 600 seconds, binder removal when treating the temperature to 135 ℃ of rubber unvulcanizate;
2) compressing tablet: in mill,, park 24h with the cooling of rubber unvulcanizate compressing tablet;
3) add small powder: will take by weighing the above-mentioned sizing material that needs usefulness by the prescription requirement, and in mill, add sulphur and promotor again and, three slices of thin-pass with its homodisperse.
4): extrude:
A: the extruder temperature of forcing machine is set at 35 ℃, 40 ℃ in a district, 40 ℃ in two districts, 45 ℃ in three districts, 50 ℃ of heads;
B: first-class die panel, reinforced at a slow speed earlier, gradually rotating speed is increased to 20r/min;
5) sulfuration:
A: the temperature of heating container is adjusted to 250 ℃ in a district, 280 ℃ in two districts, 280 ℃ in three districts respectively;
B: mix up extrude with transfer rate synchronous.
C: open microwave two joints, electric current 3A.
6) cooling: with the product process water-cooled shaping that vulcanizates.
Above-mentioned steps 3) promotor in is BZ, PZ, TT, TRA, M, CZ.
Terpolymer EP rubber is the high rubber of a species saturation, and its molecular structure determines it to have good anti-weather and resistance toheat.For mechanical property and the extrusion performance that guarantees sizing material, a large amount of carbon black-filled, oil and fire retardant have been increased, this provides bigger selection space for improving flame retardant properties and tubing properties, simultaneously wide molecular weight distribution provides favourable condition for its mechanical property and processing performance again, because low molecular existence makes the interior lubricated increase of rubber, be convenient to extrude, make the unification of mechanical property and processing performance.
Flame retardant rubber in the past mostly adopts CR rubber or halogen-containing rubber to make, because making, the existence of halogen do not meet environmental requirement, in the present invention, consideration can not be used conventional fire retardant, do not meet the fire retardant of environmental requirement as clorafin, antimonous oxide etc., adopt aluminium hydroxide and zinc borate and use flame-retardant system because aluminium hydroxide that to be halogen-free flameproof ideal is a kind of, heat, reduction temperature around it can absorb when burning.Generate mass crystallization water on the surface of combustionmaterial simultaneously, isolate contacting of combustionmaterial and oxygen, thereby play flame retardant effect, aluminium hydroxide is again the very good fumicants that presses down simultaneously, can suppress the gas that combustionmaterial produces, thereby not produce smog.Select the carbon black of being convenient to extrude simultaneously for use, use dispersing auxiliary and internal lubricant to reduce the sizing material viscosity in a large number, be beneficial to extrusion molding, adopt affine through the mineral filler increase of activation treatment and rubber molecule, the plasticity and the mechanical property of raising sizing material.
Embodiment
A kind of terpolymer EP rubber is the sealed strip of substrate material, and its composition comprises following component (representing with wt.%): terpolymer EP rubber: zinc oxide 26%: 1-1.5%, stearic acid: 1-6%, polyoxyethylene glycol: 0.5-1.6%, aluminium hydroxide: 10-32%, zinc borate: 5-16%, phosphoric acid fat: 3-16%, carbon black: 7-20%, paraffin oil: 7-21%, calcium oxide: 2-5%, sulphur: 0.25-0.5%, promotor: 0.65-1.5%.
Embodiment 1: a kind of terpolymer EP rubber is the sealed strip of substrate material, and its composition comprises following component (representing with wt.%): terpolymer EP rubber: zinc oxide 26%: 1% phosphoric acid fat: polyoxyethylene glycol 1%: aluminium hydroxide 1%: zinc borate 15%: phosphoric acid fat 7%: carbon black 10%: paraffin oil 20%: calcium oxide 15%: sulphur 3%: promotor 0.3%: 0.7%.
Embodiment 2: a kind of terpolymer EP rubber is the sealed strip of substrate material, and its composition comprises following component (representing with wt.%): terpolymer EP rubber: zinc oxide 26%: stearic acid 1.5%: polyoxyethylene glycol 5%: aluminium hydroxide 1.5%: zinc borate 10%: phosphoric acid fat 15%: carbon black 5%: paraffin oil 10%: calcium oxide 20%: sulphur 4%: promotor 0.5%: 1.5%.
Production method of the present invention may further comprise the steps successively:
1) mixing: terpolymer EP rubber, aluminium hydroxide, zinc borate, phosphoric acid fat, carbon black, paraffin oil, moisture adsorbent, stearic acid, polyoxyethylene glycol, zinc oxide is mixing in milling machine by above prescription, regulate: cooling water pressure 0.4MPa, air pressure 0.6MPa, mixing time 600 seconds, binder removal when treating the temperature to 135 ℃ of rubber unvulcanizate;
2) compressing tablet: in mill,, park 24h with the cooling of rubber unvulcanizate compressing tablet;
3) add small powder: will take by weighing the above-mentioned sizing material that needs usefulness by the prescription requirement, and in mill, add sulphur and promotor again and, three slices of thin-pass with its homodisperse.
Above-mentioned promotor is zinc dibutyl dithiocarbamate 0.19%, ziram 0.06%, curing four basic first thiurams 0.05%, tetra-sulfurized pair five ylidene methyl thiurams 0.08%, thiol group benzene isothiazole 0.12%, N cyclohexyl 2 benzothiazole sulfenamide 0.4%.
4): extrude:
A: the extruder temperature of forcing machine is set at 35 ℃, 40 ℃ in a district, 40 ℃ in two districts, 45 ℃ in three districts, 50 ℃ of heads;
B: first-class die panel, reinforced at a slow speed earlier, gradually rotating speed is increased to 20r/min;
5) sulfuration:
A: the temperature of heating container is adjusted to 250 ℃ in a district, 280 ℃ in two districts, 280 ℃ in three districts respectively;
B: mix up extrude with transfer rate synchronous.
C: open microwave two joints, electric current 3A.
6) cooling: with the product process water-cooled shaping that vulcanizates.
The strength ratio of terpolymer EP rubber self is lower, lean on a large amount of packing strengthening agents just can have the technology value and use value.Will possess flame retardant effect simultaneously and also need fill a large amount of fire retardants, because traditional halide-containing and antimonous oxide, Halogen or heavy metal do not meet environmental requirement, and burning the time can produce a large amount of smog.Therefore, can only relatively poor aluminium hydroxide and the zinc borate of result of use, make this product reach flame retardant effect just must heavy addition, and this just makes that gum content declines to a great extent, thereby causes losing the part mechanical property, as intensity, elasticity, pressure change etc.Guarantee that flame retardant effect and mechanical property will reduce the filling of carbon black and process oil, can lose its processing performance so again, as extrude phenomenons such as difficulty, appearance be bad.These problems are difficult points of this project, it also is the difficult point of whole industry, the autohension and the mutual viscosity of Ethylene Propylene Terpolymer are poor, a large amount of fill mineral fillers and make self strength degradation of rubber unvulcanizate, viscosity increases, and occurs in the product extrusion process giving birth to heat soon thereby make, thereby makes the sizing material viscosity degradation, extrude phenomenons such as product is not fine and close, surface irregularity, edge hair, guarantee the mechanical property and the extrusion performance of sizing material.Select for use ethylene content than higher, molecular weight distribution is than the ethylene-propylene diene copolymer of broad.Because the terpolymer EP rubber of high ethylene content self has certain mechanical property, carbon black-filled, oil that can be a large amount of and fire retardant, this provides bigger selection space for improving flame retardant properties and tubing properties, simultaneously wide molecular weight distribution provides favourable condition for its mechanical property and processing performance again, because low molecular existence makes the interior lubricated increase of rubber, be convenient to extrude, make the unification of mechanical property and processing performance.
Claims (5)
1. sealed strip that terpolymer EP rubber is a substrate material, it is characterized in that: its composition comprises following component (representing with wt.%): terpolymer EP rubber: zinc oxide 26%: 1-1.5%, Sa stearic acid: 1-6%, polyoxyethylene glycol: 0.5-1.6%, aluminium hydroxide: 10-32%, zinc borate: 5-16%, phosphoric acid fat: 3-16%, carbon black: 7-20%, paraffin oil: 7-21%, calcium oxide: 2-5%, sulphur: 0.25-0.5%, promotor: 0.65-1.5%.
2. a kind of terpolymer EP rubber according to claim 1 is the sealed strip of substrate material, it is characterized in that: its composition comprises following component (representing with wt.%): terpolymer EP rubber: zinc oxide 26%: Sa stearic acid 1%: polyoxyethylene glycol 1%: aluminium hydroxide 1%: zinc borate 15%: phosphoric acid fat 7%: carbon black 10%: paraffin oil 20%: calcium oxide 15%: sulphur 3%: promotor 0.3%: 0.7%.
3. a kind of terpolymer EP rubber according to claim 1 is the sealed strip of substrate material, it is characterized in that: its composition comprises following component (representing with wt.%): terpolymer EP rubber: terpolymer EP rubber: zinc oxide 26%: Sa stearic acid 1.5%: polyoxyethylene glycol 5%: aluminium hydroxide 1.5%: zinc borate 10%: phosphoric acid fat 15%: carbon black 5%: paraffin oil 10%: calcium oxide 20%: sulphur 4%: promotor 0.5%: 1.5%.
4. a kind of terpolymer EP rubber according to claim 3 is the sealed strip of substrate material, it is characterized in that: described promotor being is zinc dibutyl dithiocarbamate 0.19%, ziram 0.06%, curing four basic first thiuram 0.03-0.08%, tetra-sulfurized pair five ylidene methyl thiurams 0.08%, thiol group benzene isothiazole 0.12%, N cyclohexyl 2 benzothiazole sulfenamide 0.16-0.97%.
5. production method that a kind of terpolymer EP rubber according to claim 1 is the sealed strip of substrate material may further comprise the steps successively:
1) mixing: terpolymer EP rubber, aluminium hydroxide, zinc borate, phosphoric acid fat, carbon black, paraffin oil, moisture adsorbent, stearic acid, polyoxyethylene glycol, zinc oxide is mixing in milling machine by above prescription, regulate: cooling water pressure 0.4MPa, air pressure 0.6MPa, mixing time 600 seconds, binder removal when treating the temperature to 135 ℃ of rubber unvulcanizate;
2) compressing tablet: in mill,, park 24h with the cooling of rubber unvulcanizate compressing tablet;
3) add small powder: will take by weighing the above-mentioned sizing material that needs usefulness by the prescription requirement, and in mill, add sulphur and promotor again and, three slices of thin-pass with its homodisperse;
4): extrude:
A: the extruder temperature of forcing machine is set at 35 ℃, 40 ℃ in a district, 40 ℃ in two districts, 45 ℃ in three districts, 50 ℃ of heads;
B: first-class die panel, reinforced at a slow speed earlier, gradually rotating speed is increased to 20r/min;
5) sulfuration:
A: the temperature of heating container is adjusted to 250 ℃ in a district, 280 ℃ in two districts, 280 ℃ in three districts respectively;
B: mix up extrude with transfer rate synchronous;
C: open microwave two joints, electric current 3A;
6) cooling: with the product process water-cooled shaping that vulcanizates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100001403A CN101230248B (en) | 2008-01-04 | 2008-01-04 | Sealing strip using EPDM rubber as host material and production method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100001403A CN101230248B (en) | 2008-01-04 | 2008-01-04 | Sealing strip using EPDM rubber as host material and production method thereof |
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| Publication Number | Publication Date |
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| CN101230248A true CN101230248A (en) | 2008-07-30 |
| CN101230248B CN101230248B (en) | 2010-06-16 |
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Effective date of registration: 20190522 Address after: 212353 Lingkou Town, Danyang City, Jiangsu Province (west of the original railway station) Patentee after: Jiangsu wanben Automobile Fittings Co. Ltd. Address before: 212353 Lingkou Station, Shanghai-Nanjing Line, Danyang City, Jiangsu Province Patentee before: Danyang Wanben Automotive Parts Co., Ltd. |
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