CN101735620B - High-temperature resisting methyl vinyl silicone rubber - Google Patents
High-temperature resisting methyl vinyl silicone rubber Download PDFInfo
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- CN101735620B CN101735620B CN2009102172834A CN200910217283A CN101735620B CN 101735620 B CN101735620 B CN 101735620B CN 2009102172834 A CN2009102172834 A CN 2009102172834A CN 200910217283 A CN200910217283 A CN 200910217283A CN 101735620 B CN101735620 B CN 101735620B
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Abstract
The invention discloses high-temperature resisting methyl vinyl silicone rubber as well as a prescription and a preparation process thereof. The high-temperature resisting modified silicon rubber material which has more than 300 DEG C of application temperature and can not crack when according with requirements of 550 DEG C, 4mm distance and high-temperature radiation for more than 12 minutes is prepared by adopting the following steps of: adding cerium oxide and polymide into the prescription in which methyl vinyl silicon crude rubber is taken as a rubber raw material to improve the heat-resisting temperature, adding hydroxy silicone oil, dimethyl silicon oil and a silane coupling agent to improve the oil-resisting performance, adding precipitation method white carbon black and gas-phase method white carbon black to improve the tearing-resistance strength, adding quartz power and kieselguhr to improve the tensile strength and matching technical schemes of the preparation process. The high-temperature resisting methyl vinyl silicone rubber overcomes the problems and the defects of poor high-temperature and aging resistance performance and short service life of the common silicone rubber in the prior art, satisfies the special requirements for the heat-resisting performance, the electrical strength and the mechanical strength of automotive rubber products, and ensures that the silicone rubber products achieve the aims of improving the high-temperature resistance performance and prolonging the service life.
Description
Technical field
The present invention relates to a kind of modified silicon rubber material and preparation method thereof, specifically be meant purposes such as being used to make automotive ignition cable sheath, sebific duct, sealing-ring, possess high insulation, high electromagnetic damping, high temperature resistant, anticorona, high anti-tearing strength, anti-ly subdue, a kind of high-temperature resisting methyl vinyl silicone rubber of oil resistant swelling, ageing-resistant be full of cracks performance.
Background technology
The common methyl vinyl silicone rubber of prior art have good anti-ly subdue, tensile strength, elongation and oil resistant, resistance toheat, but, raising along with the speed of a motor vehicle, engine temperature increases, at 550 ℃, 4 millimeters of distances, under the requirement condition of hyperthermia radiation more than 12 minutes, the common methyl vinyl silicone rubber surface ag(e)ing be full of cracks that is used for automotive ignition cable sheath, sebific duct is serious, has shortened the work-ing life of silicon rubber greatly, therefore, the ordinary silicon rubber of prior art exists high temperature resistant aging resistance poor, the problems and shortcomings that work-ing life is short.
Summary of the invention
Problems and shortcomings at above-mentioned prior art existence, it is being in the prescription of rubber raw materials with the methyl ethylene silicon raw rubber that the present invention takes, add cerium oxide, polyimide improves heat resisting temperature, add hydroxy silicon oil, dimethyl silicone oil, silane coupling agent improves oil resistance, add precipitated silica, thermal silica improves tearing toughness, add silica powder, diatomite improves tensile strength, and supporting technical scheme with preparation technology's method, a kind of high-temperature resisting methyl vinyl silicone rubber is provided, be intended to prepare and use heatproof more than 300 ℃, meet the requirements 550 ℃, 4 millimeters of distances, the resistant to elevated temperatures modified silicon rubber material that hyperthermia radiation did not chap more than 12 minutes, to satisfy the automobile rubber goods to resistance toheat, electrical strength, the particular requirement of physical strength makes silastic product reach the raising resistance to elevated temperatures, the purpose that increases the service life.
The object of the present invention is achieved like this: a kind of high-temperature resisting methyl vinyl silicone rubber, comprise prescription, preparation technology's method, and wherein: described prescription is rubber raw materials: methyl ethylene silicon raw rubber, 39.9%; Oil packing: hydroxy silicon oil 1.6%, dimethyl silicone oil 0.4%; Silane coupling agent: trade(brand)name WD-27, vinyl three ('beta '-methoxy oxyethyl group) silane 0.4%; Vulcanizing agent: trade(brand)name DCP, dicumyl peroxide 1.6%; Weighting agent: silica powder 4%, diatomite 4%; Heat-resisting additive: cerium oxide 4%, polyimide 4%; Strengthening agent: precipitated silica 19.9%, thermal silica 19.9%; Promoting agent: Zinic stearas 0.3%; The prescription unit is weight percentage;
Described preparation technology's method is mixing, wherein,
Step 1, adjustment Banbury mixer temperature: 100 ℃, rotating speed: 32 rev/mins, the strengthening agent in rubber raw materials and the prescription, weighting agent, oil packing, promoting agent are dropped into Banbury mixer, the banburying of under the briquetting that floats, starting shooting, about 60 minutes, shut down, add heat-resisting additive, silane coupling agent, the start banburying, about 30 minutes, the glue temperature control obtained banburying glue at 110～120 ℃, binder removal moves to kneader;
In step 2, the kneader with 200 ℃ of the prior preheating temperatures of banburying glue input, with the logical nitrogen of 5 cubic meters per minute speed, 35 rev/mins of rotating speeds, 170～200 ℃ of glue temperature were mediated 30 minutes; Vacuumize then, vacuum tightness 0.05～0.06MPa, 170～200 ℃ of glue temperature were mediated 20 minutes, and binder removal obtains to mediate glue;
Step 3, will mediate glue and drop into twin-screw extruder, evenly the vulcanizing agent that adds in the prescription is mixing, and roller temperature is below 40 ℃, 4～5 millimeters of roll spacings, and mixing 5 minutes, following sheet clot, cooling was left standstill slaking 8 hours～24 hours, the acquisition rubber unvulcanizate.
Beneficial effect
The rubber unvulcanizate of above-mentioned acquisition, be and use heatproof more than 300 ℃, meet the requirements 550 ℃, 4 millimeters of distances, the high-temperature resisting methyl vinyl silicone rubber material that hyperthermia radiation did not chap more than 12 minutes uses for making goods such as automotive ignition cable sheath, sebific duct, sealing-ring.Goods are using below 300 ℃, and the life-span can reach more than 5 years.
To sum up, it is being in the prescription of rubber raw materials with the methyl ethylene silicon raw rubber that the present invention takes, add cerium oxide, polyimide improves heat resisting temperature, add hydroxy silicon oil, dimethyl silicone oil, silane coupling agent improves oil resistance, add precipitated silica, thermal silica improves tearing toughness, add silica powder, diatomite improves tensile strength, and supporting technical scheme with preparation technology's method, prepare and use heatproof more than 300 ℃, meet the requirements 550 ℃, 4 millimeters of distances, the resistant to elevated temperatures modified silicon rubber material that hyperthermia radiation did not chap more than 12 minutes, the ordinary silicon rubber that has overcome prior art exists high temperature resistant aging resistance poor, the problems and shortcomings that work-ing life is short, a kind of high-temperature resisting methyl vinyl silicone rubber that is provided, the automobile rubber goods have been satisfied to resistance toheat, electrical strength, the particular requirement of physical strength makes silastic product reach the raising resistance to elevated temperatures, the purpose that increases the service life.
The embodiment explanation
Below by specific embodiment to high-temperature resisting methyl vinyl silicone rubber of the present invention, be described in further detail, the those skilled in the art can make high-temperature resisting methyl vinyl silicone rubber with reference to prescription and the preparation method of embodiment, but should not be construed as any limitation of the invention.
Embodiment
Embodiment
The name of an article: high-temperature resisting methyl vinyl silicone rubber
Prescription: the prescription unit is weight percentage;
Rubber raw materials: methyl ethylene silicon raw rubber, 39.9%;
Oil packing: hydroxy silicon oil 1.6%, dimethyl silicone oil 0.4%;
Silane coupling agent: trade(brand)name WD-27, vinyl three ('beta '-methoxy oxyethyl group) silane 0.4%;
Vulcanizing agent: trade(brand)name DCP, dicumyl peroxide 1.6%;
Weighting agent: silica powder 4%, diatomite 4%;
Heat-resisting additive: cerium oxide 4%, polyimide 4%;
Strengthening agent: precipitated silica 19.9%, thermal silica 19.9%;
Promoting agent: Zinic stearas 0.3%;
The prescription unit is weight percentage.
Preparation
Environment: room temperature, normal pressure;
Equipment: Banbury mixer, vacuum kneader, two roller opening rubber mixing machines.
Preparation technology's method, mixing;
Step 1, adjustment Banbury mixer temperature: 100 ℃, rotating speed: 32 rev/mins, the strengthening agent in rubber raw materials and the prescription, weighting agent, oil packing, promoting agent are dropped into Banbury mixer, the banburying of under the briquetting that floats, starting shooting, about 60 minutes, shut down, add heat-resisting additive, silane coupling agent, the start banburying, about 30 minutes, the glue temperature control obtained banburying glue at 110～120 ℃, binder removal moves to kneader;
In step 2, the kneader with 200 ℃ of the prior preheating temperatures of banburying glue input, with the logical nitrogen of 5 cubic meters per minute speed, 35 rev/mins of rotating speeds, 170～200 ℃ of glue temperature were mediated 30 minutes; Vacuumize then, vacuum tightness 0.05～0.06MPa, 170～200 ℃ of glue temperature were mediated 20 minutes, and binder removal obtains to mediate glue;
Step 3, will mediate glue and drop into twin-screw extruder, evenly the vulcanizing agent that adds in the prescription is mixing, and roller temperature is below 40 ℃, 4～5 millimeters of roll spacings, and mixing 5 minutes, following sheet clot, cooling was left standstill slaking 8 hours～24 hours, the acquisition rubber unvulcanizate.
The rubber unvulcanizate that obtains, be and use heatproof more than 300 ℃, meet the requirements 550 ℃, 4 millimeters of distances, the high-temperature resisting methyl vinyl silicone rubber material that hyperthermia radiation did not chap more than 12 minutes uses for making goods such as automotive ignition cable sheath, sebific duct, sealing-ring.
Claims (1)
1. the preparation method of a high-temperature resisting methyl vinyl silicone rubber is characterized in that: comprise and filling a prescription and preparation technology's method that described prescription is rubber raw materials: methyl ethylene silicon raw rubber, 39.9%; Oil packing: hydroxy silicon oil 1.6%, dimethyl silicone oil 0.4%; Silane coupling agent: trade(brand)name WD-27, vinyl three ('beta '-methoxy oxyethyl group) silane 0.4%; Vulcanizing agent: trade(brand)name DCP, dicumyl peroxide 1.6%; Weighting agent: silica powder 4%, diatomite 4%; Heat-resisting additive: cerium oxide 4%, polyimide 4%; Strengthening agent: precipitated silica 19.9%, thermal silica 19.9%; Promoting agent: Zinic stearas 0.3%; The prescription unit is weight percentage;
Described preparation technology's method is mixing;
Step 1, adjustment Banbury mixer temperature: 100 ℃, rotating speed: 32 rev/mins, the strengthening agent in rubber raw materials and the prescription, weighting agent, oil packing, promoting agent are dropped into Banbury mixer, the banburying of under the briquetting that floats, starting shooting, 60 minutes, shut down, add heat-resisting additive, silane coupling agent, the start banburying, 30 minutes, the glue temperature control obtained banburying glue at 110～120 ℃, binder removal moves to kneader;
In step 2, the kneader with 200 ℃ of the prior preheating temperatures of banburying glue input, with the logical nitrogen of 5 cubic meters per minute speed, 35 rev/mins of rotating speeds, 170～200 ℃ of glue temperature were mediated 30 minutes; Vacuumize then, vacuum tightness 0.05～0.06MPa, 170～200 ℃ of glue temperature were mediated 20 minutes, and binder removal obtains to mediate glue;
Step 3, will mediate glue and drop into twin-screw extruder, evenly the vulcanizing agent that adds in the prescription is mixing, and roller temperature is below 40 ℃, 4～5 millimeters of roll spacings, and mixing 5 minutes, following sheet clot, cooling was left standstill slaking 8 hours～24 hours, the acquisition rubber unvulcanizate.
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| CN2009102172834A CN101735620B (en) | 2009-12-27 | 2009-12-27 | High-temperature resisting methyl vinyl silicone rubber |
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| CN2009102172834A CN101735620B (en) | 2009-12-27 | 2009-12-27 | High-temperature resisting methyl vinyl silicone rubber |
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| CN101735620B true CN101735620B (en) | 2011-08-03 |
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Owner name: NINGBO GUANGMING RUBBER + PLASTIC CO., LTD. Free format text: FORMER OWNER: ZHOU ZHONGKUN Effective date: 20110916 |
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Effective date of registration: 20110916 Address after: 315609, Ninghai Zhejiang Meilin Street Meilin Industrial Zone Ningbo Guangming Rubber Plastic Co., Ltd. Patentee after: Ningbo Guangming Rubber and Plastic Co., Ltd. Address before: 315609, Ninghai Zhejiang Meilin Street Meilin Industrial Zone Ningbo Guangming Rubber Plastic Co., Ltd. Patentee before: Zhou Zhongkun |