CN102260394B - Ethylene propylene diene monomer rubber composition and preparation method thereof - Google Patents
Ethylene propylene diene monomer rubber composition and preparation method thereof Download PDFInfo
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- CN102260394B CN102260394B CN 201110178428 CN201110178428A CN102260394B CN 102260394 B CN102260394 B CN 102260394B CN 201110178428 CN201110178428 CN 201110178428 CN 201110178428 A CN201110178428 A CN 201110178428A CN 102260394 B CN102260394 B CN 102260394B
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Abstract
The invention discloses an ethylene propylene diene monomer rubber composition, which comprises: a) 21.7 to 26.1 weight percent of ethylene propylene diene monomer rubber; b) 14.4 to 20.9 weight percent of dithiocarbamate accelerator; c) 8.3 to 9.9 weight percent of thiazole accelerator; and d) 47.8 to 55.1 weight percent of dehumidifying and defoaming agent. The preparation method of the ethylene propylene diene monomer rubber composition comprises: feeding the ethylene propylene diene monomer rubber into a rubber internal mixer from a feeding opening for plastication; adding dehumidifying and defoaming agent, thiazole accelerator and dithiocarbamate accelerator powder in turn, mixing and internally mixing; and removing rubber, feeding the rubber material into an open mixer, rolling by a covered roll, cooling the rubber material, removing the rolled rubber and thus obtaining the ethylene propylene diene monomer rubber composition. The ethylene propylene diene monomer rubber composition and the preparation method thereof have the advantages of high production efficiency, high product quality, low environmental pollution and the like.
Description
Technical field
The present invention relates to the rubber technology field, relate in particular to a kind of EPT rubber composition and preparation method thereof.
Background technology
Traditional rubber-heating sulfuration adopts vulcanizing press to carry out usually, its vulcanization is: the rubber unvulcanizate that contains vulcanizing agent of certainweight is put into dull and stereotyped rubber mold, the flat board that closes under certain temperature and pressure condition, is made product by mould setting sulfuration by heat conducting form.
The production technique of extruding the continuous microwave sulfuration is fully different from above-mentioned traditional baking mode, and its basic craft course is: at first, sizing material is shaped to continuous shape blank by forcing machine; Then, by the delivery of travelling belt or roller, send into and be heated to required curing temperature in the microwave heating equipment, and preliminary sulfuration; Enter again the continuation of insurance of warm air beating equipment relaying and hold curing temperature to vulcanizing terminal time; At last, cool off, the post-processing operation such as cutting obtains finished product.
Compare with the baking method, it is different to extrude continuous microwave sulfuration ratio juris, and the composition of rubber unvulcanizate is also different.Reason is: the firstth, and it is fast that vulcanization rate is wanted, and purpose is in order to obtain higher production efficiency; The secondth, absorb the water vapour that distributes in the sulfidation, if absorb not exclusively, gas can produce spilehole in the sizing material intermediate expansion, affects quality product.Therefore in rubber slice process, generally all can satisfy these particular requirements at opening rubber mixing machine adding thiofide and moisture removing foam eliminating agent.But general commercially available above-mentioned Synergist S-421 95 all is to be Powdered, adds fashionable dust on the opening rubber mixing machine and can fill the air whole production environment, sucks or all can cause people's discomfort with skin contact.
Publication number provides outstanding EPT rubber composition of a kind of over-all properties and preparation method thereof for the application for a patent for invention of CN102093644, is made by terpolymer EP rubber 75-90 mass parts, chlorosulfonated polyethylene rubber 10-25 mass parts, ketoamine resultant of reaction anti-aging agent 1.5-3 mass parts, p phenylenediamine type antioxidant 1-3 mass parts, physical antioxidant 1.5-2.5 mass parts, stearic acid 0.5-1.0 mass parts, promoting agent 5-8 mass parts, strengthening agent 30-50 mass parts, softening agent 3-8 mass parts, vulcanizing agent 1.5-3 mass parts and promotor 2-4 mass parts.The preparation method of this patent application is mixer mixing or mill mixing.The purpose of this patent application is by the superior optimization to the resistance to elevated temperatures of EPDM, cooperates the performance advantage of CSM again, and a kind of high temperature resistant and EPDM rubber elastomer composition material that over-all properties is outstanding is provided.
Yet this patent application does not overcome the above-mentioned technological deficiency that prior art exists fully, has still that vulcanization rate is slow, the pungency dust is by problems such as human body contacts.
Summary of the invention
The purpose of this invention is to provide and a kind ofly novel can satisfy simultaneously above-mentioned existing terpolymer EP rubber and extrude ep-type material of the technical problem that the continuous microwave sulfuration process exists and preparation method thereof.
For achieving the above object, the applicant has studied different ingredients to the Different Effects of curing temperature and speed, product performance, and a kind of EPT rubber composition is provided, and comprises following component:
A) terpolymer EP rubber 21.7～26.1wt%
B) dithiocarbamatetype accelerator 14.4～20.9wt%
C) thiazole accelerator 8.3～9.9wt%
D) moisture removing foam eliminating agent 47.8～55.1wt%.
Wherein, described dithiocarbamatetype accelerator is accelerant B Z (zinc dibutyl dithiocaarbamate), promotor EZ (zinc diethyldithiocarbamate), promotor PX (N-ethyl-N-phenyl zinc dithiocarbamate) or promotor PZ (ziram).
Wherein, described thiazole accelerator is captax (2-mercaptobenzothiazole) or altax (2,2 '-dithio-bis-benzothiazole).
Wherein, described moisture removing foam eliminating agent is calcium oxide.
Among the present invention, terpolymer EP rubber is as framework material, and effect is that other components are wrapped in its molecular structure, and products obtained therefrom is mixed.
Dithiocarbamatetype accelerator and thiazole accelerator, must in Banbury mixer, add, its purpose is: 1. these two types of promotor may produce hormesis to human body skin and cause inflammation, therefore be chosen in to add in the Banbury mixer avoiding and directly contact 2. in the technique of the present invention in the regulation Banbury mixer working temperature (below 120 ℃) with human body, two kinds of rubber accelerators of this that select also do not reach the sulfuration critical temperature, can not produce to decompose and occur the grog phenomenon.
The Main Function of moisture removing foam eliminating agent is to absorb remaining moisture in the sizing material under microwave non-pressure cure condition, makes it at high temperature can not be vaporizated into water vapour, avoids producing product and sends out the hole phenomenon.
The present invention also provides a kind of preparation method of above-mentioned EPT rubber composition, and it may further comprise the steps:
A) take by weighing terpolymer EP rubber, drop into rubber internal mixer from charging opening, in banburying chamber, plasticate;
B) add successively again moisture removing foam eliminating agent powder, thiazole accelerator powder and dithiocarbamatetype accelerator powder after the weighing, mix banburying;
C) after banburying was finished, binder removal was thrown into bag rolling refining in the mill with the sizing material of discharging, to the sizing material cooling, take off, be used for the short sulfuration of the strong suction environment-friendly materials that terpolymer EP rubber is extruded the continuous microwave sulfuration.
The temperature of mixing banburying wherein, step b) is 100-120 ℃.
Wherein, step c) specifically comprises, after banburying is finished, binder removal is thrown into bag rolling refining in the mill with the sizing material of discharging, and stirs sizing material, treat that the sizing material temperature drops to below 80 ℃, the sizing material smooth surface is cut off cooling with sizing material during without bubble, be used for the short sulfuration of the strong suction environment-friendly materials that terpolymer EP rubber is extruded the continuous microwave sulfuration.
In the prior art, step b) these three classes auxiliary chemicals that add in all are the slice stages (being that terpolymer EP rubber is extruded last stage before the continuous microwave sulfuration) at compounding rubber, be on opening rubber mixing machine with rubber accelerator, vulcanizing agent and moisture removing foam eliminating agent join in the terpolymer EP rubber mixing jointly, because vulcanizing agent and some promotor (such as thiuram type accelerator) must add at low temperatures, direct vulcanized rubber at high temperature, cause product rejection, and the working temperature of rubber internal mixer is higher, therefore in order to reduce production stage, prior art all directly adds all auxiliary agents at opening rubber mixing machine; The key distinction of the opening rubber mixing machine that the rubber internal mixer that the present invention adopts and prior art are used is: the dust in the Banbury mixer can not fly away in the atmosphere, and mixes between each raw material, but working temperature higher (above 100 ℃); It is then very serious that the dust of opening rubber mixing machine flies away situation, and the uniformity coefficient of mixing is usually also high not as good as Banbury mixer.Therefore, the present invention extrudes the first stage before the step of continuous microwave sulfuration at terpolymer EP rubber, with rubber internal mixer terpolymer EP rubber and moisture removing foam eliminating agent, thiazole accelerator and the dithiocarbamatetype accelerator that can process under comparatively high temps are carried out mixingly, have following beneficial effect and advantage:
1. production efficiency improves.It is fast to use EPT rubber composition of the present invention to extrude the continuous microwave vulcanization rate, and existing common terpolymer EP rubber is 4.0min～4.5min at 170 ℃ of lower mensuration vulcanization rate T90; EPT rubber composition of the present invention is 1.0min～1.5min at 170 ℃ of lower mensuration vulcanization rate T90.Therefore, travelling belt product when reaching higher transmission speed can not produce yet and owe the sulphur phenomenon in the microwave vulcanization process, thereby accelerates the production rate of product, enhances productivity.
2. improved quality product.Adopt the product cross section place of rubber combination production of the present invention not to be prone to a hole phenomenon.In general, in case product cross section is sent out the hole, not only outward appearance is not attractive in appearance, more can greatly reduce the physicals of finished product, can badly influence quality product.Tensile strength such as the script product can reach 11～13Mpa, and the tensile strength of product only can reach 8～9Mpa behind the hole.Usually producing the reason of sending out the hole phenomenon is that pulverous moisture removing foam eliminating agent has absorbed airborne moisture, causes the moisture removing foam eliminating agent to be lost efficacy.In the present invention, the moisture removing foam eliminating agent is pre-mixed in rubber, it is coated in the molecular structure speed of moisture in the moisture removing foam eliminating agent absorbing air that slowed down to a great extent by the reticulated structure of rubber, thereby reduce the possibility that the hole phenomenon appears sending out in product cross section, improve the quality of products.
3. reduce environmental pollution.The rubber accelerator dust directly contacts and may cause inflammation with Person's skin, sucks then can to produce bitter taste etc. and feel to cause that sense organ is uncomfortable.Moisture removing foam eliminating agent powder directly contacts the moisture that then can absorb in the human body skin with human body, causes xerosis cutis to be itched.The method that the present invention originally adds these raw materials on the opening rubber mixing machine changes into and adding in rubber internal mixer, basically eliminate floating dust in the production plant air, the optimization production environment, the operative employee's that keeps the scene intact is healthy.
The used terpolymer EP rubber of the present invention, moisture removing foam eliminating agent, thiazole accelerator and dithiocarbamatetype accelerator are commercially available.Rubber internal mixer model used in the present invention is X (S) M * 50 (4～40), is produced by Dalian Rubber Plastic Machinery Co.Mill model used in the present invention is XK-400A, is produced by the rubber machinery plant, Shanghai.
Embodiment
Embodiment 1
Take by weighing terpolymer EP rubber 9.765kg, drop into rubber internal mixer from charging opening, fall the floating weight pressurization, be pressed into and plasticate 5 minutes in the banburying chamber, mention floating weight, add successively lime powder 21.51kg from charging opening, captax 3.735kg and accelerant B Z 6.48kg fall floating weight, mix banburying to sizing material temperature and reach 110 ℃, after banburying is finished, binder removal is thrown into bag rolling refining in the mill with the sizing material of discharging, and constantly stirs sizing material, treat that the sizing material temperature drops to below 80 ℃, when observing the sizing material smooth surface without bubble, sizing material is cut off cooling, obtain the short sulfuration of the strong suction environment-friendly materials 41.49kg that terpolymer EP rubber is extruded the continuous microwave sulfuration.
The preparation method of embodiment 2-is with embodiment 1, and prescription sees Table 1.
The prescription of table 1 EPT rubber composition embodiment 2-
| Terpolymer EP rubber | Dithiocarbamatetype accelerator | Thiazole accelerator | Calcium oxide | |
| Embodiment 2 | 11.745kg | Promotor EZ 7.02kg | Altax 4.275kg | 23.85kg |
| Embodiment 3 | 10.00kg | Promotor PX 6.80kg | Captax 3.96kg | 19.8kg |
| Embodiment 4 | 9.20kg | Promotor PZ 8.36kg | Altax 3.44kg | 22.04kg |
Prescription according to embodiment 1 cooperates product performance to see Table 2.
Table 2 embodiment 1 prescription cooperates product performance
As seen, the physicals of EPT rubber composition of the present invention is excellent, and is more suitable in the continuous microwave sulfuration and gives full play to its performance.
Claims (6)
1. the preparation method of an EPT rubber composition is characterized in that, it may further comprise the steps:
A) take by weighing terpolymer EP rubber, drop into rubber internal mixer from charging opening, in banburying chamber, plasticate;
B) add successively again moisture removing foam eliminating agent, thiazole accelerator and dithiocarbamatetype accelerator powder, mix banburying;
C) after banburying is finished, binder removal, the sizing material of discharging is thrown into bag rolling refining in the mill, sizing material is lowered the temperature, take off, namely get EPT rubber composition, wherein, the add-on of each component is terpolymer EP rubber 21.7～26.1wt%, dithiocarbamatetype accelerator 14.4～20.9wt%, thiazole accelerator 8.3～9.9wt%, moisture removing foam eliminating agent 47.8～55.1wt%.
2. the preparation method of EPT rubber composition according to claim 1 is characterized in that: the temperature of mixing banburying step b) is 100-120 ℃.
3. the preparation method of EPT rubber composition according to claim 1, it is characterized in that: step c) for after banburying finishes, binder removal, the sizing material of discharging is thrown into bag rolling refining in the mill, stir sizing material, treat that the sizing material temperature drops to below 80 ℃, the sizing material smooth surface is during without bubble, sizing material is cut off cooling, namely get EPT rubber composition.
4. according to claim 1 to the preparation method of 3 each described EPT rubber compositions, it is characterized in that: described dithiocarbamatetype accelerator is accelerant B Z, promotor EZ, promotor PX or promotor PZ.
5. according to claim 1 to the preparation method of 3 each described EPT rubber compositions, it is characterized in that: described thiazole accelerator is captax or altax.
6. according to claim 1 to the preparation method of 3 each described EPT rubber compositions, it is characterized in that: described moisture removing foam eliminating agent is calcium oxide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN 201110178428 CN102260394B (en) | 2011-06-28 | 2011-06-28 | Ethylene propylene diene monomer rubber composition and preparation method thereof |
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| CN 201110178428 CN102260394B (en) | 2011-06-28 | 2011-06-28 | Ethylene propylene diene monomer rubber composition and preparation method thereof |
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| CN102260394B true CN102260394B (en) | 2013-01-02 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1159458A (en) * | 1995-11-22 | 1997-09-17 | 联合碳化化学品及塑料技术公司 | Curable ethylene-alpha olefin-diene elastomer composition |
| EP1074583A1 (en) * | 1999-08-03 | 2001-02-07 | Tokai Rubber Industries, Ltd. | Rubber compositions and hoses |
| US20060189741A1 (en) * | 2005-02-21 | 2006-08-24 | Toyoda Gosei Co., Ltd. | EPDM composition and automotive brake sytem rubber component |
| CN101230248A (en) * | 2008-01-04 | 2008-07-30 | 丹阳市万奔汽车配件有限公司 | Sealing strip using epdm rubber as host material |
-
2011
- 2011-06-28 CN CN 201110178428 patent/CN102260394B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1159458A (en) * | 1995-11-22 | 1997-09-17 | 联合碳化化学品及塑料技术公司 | Curable ethylene-alpha olefin-diene elastomer composition |
| EP1074583A1 (en) * | 1999-08-03 | 2001-02-07 | Tokai Rubber Industries, Ltd. | Rubber compositions and hoses |
| US20060189741A1 (en) * | 2005-02-21 | 2006-08-24 | Toyoda Gosei Co., Ltd. | EPDM composition and automotive brake sytem rubber component |
| CN101230248A (en) * | 2008-01-04 | 2008-07-30 | 丹阳市万奔汽车配件有限公司 | Sealing strip using epdm rubber as host material |
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Owner name: SHANGHAI CHANGNING RUBBER PRODUCTS FACTORY Free format text: FORMER NAME: CHANGNING RUBBER PRODUCTS FACTORY, SHANGHAI |
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Address after: 200051 No. 1279, Lane 2, Zhongshan West Road, Shanghai Patentee after: Shanghai Changning Rubber Product Factory Co., Ltd. Address before: 200051 No. 1279, Lane 2, Zhongshan West Road, Shanghai Patentee before: Changning Rubber Products Factory, Shanghai |