1、2022-4-25RVT硅橡胶原材料1RVT硅橡胶原材料硅橡胶原材料RVT硅橡胶原材料1简介1940年GRochow发明了用硅和氯甲烷直接合成甲基氯硅烷的方法，开始了从实验室向工业生产的转化。1944年美国General Electric公司合成聚二甲基硅氧烷。1945美国Dow Corning公司研究的商品硅橡胶SR-73和SR-74问世，但质量差，至1948年JENyde等人得到高质量的聚合物将其取代。使用气相法白炭黑为补强填料，有机过氧化物作硫化催化剂，得到了强韧的实用硅橡胶，从而使二甲基硅橡胶的性能达到实用阶段。RVT硅橡胶原材料1简介1948年甲基乙烯基硅橡胶研制成功。1951年又开
2、发成功苯基硅橡胶。随之又研究开发出室温硫化的硅橡胶，此后又相继研制开发成功腈硅橡胶、氟硅橡胶等。1966年又成功地研制出聚碳硼烷硅氧烷橡胶，可在约400下使用。目前有机硅产品大致分为四大类：、和，前三类通称为聚硅氧烷材料。RVT硅橡胶原材料1RVT硅橡胶原材料1一、硅橡胶（Silicone Rubber/Q）1、什么是硅橡胶是由各种二氯硅烷经过水解、缩聚而得到的一种元素有机弹性体。RVT硅橡胶原材料1RVT硅橡胶原材料12、硅橡胶的分类品种、按硫化温度、按化学结构分、按不同特性分RVT硅橡胶原材料1、按硫化温度分和两类高温硫化型，即HTV型，为高分子量的固体橡胶，成型硫化的加工工艺和普通橡胶相
3、似。室温硫化型，即RTV型，是低分子量的有，在常温下即可硫化成型，RTV又分为双组分RTV硅橡胶（简称RTV-2）和单组分RTV硅橡胶（简称RTV-1）。RVT硅橡胶原材料1、按化学结构分引入侧基可显著地改进其物理机械性能、耐温性能和加工性能。根据硅橡胶的侧基不同主要有：RVT硅橡胶原材料1二甲基硅橡胶（MQ）能在60250范围内保持良好弹性，但其硫化活性低，工艺性能差，厚壁制品在二段硫化时易发泡，高温压缩变形大等；RVT硅橡胶原材料1甲基乙烯基硅橡胶（VMQ）是由二甲基硅氧烷与少量乙烯基硅氧烷共聚而成，乙烯基含量一般为0.10.3mol；在硅橡胶生产中，品种牌号最多的。 RVT硅橡胶原材料1
4、甲基乙烯基苯基硅橡胶（PVMQ）甲基乙烯基苯基硅橡胶简称它是在乙烯基硅橡胶的分子链中引入二苯基硅氧烷链节而制成的。引入大体积的苯基破坏二甲基硅氧烷结构的规整性，RVT硅橡胶原材料1甲基乙烯基三氟丙基硅橡胶（FVMQ）甲基乙烯基三氟丙基硅橡胶简称氟硅橡胶(FVMQ)，它是在乙烯基硅橡胶的分子链中引入氟代烷基；主要特点是具有优良的耐油；氟硅橡胶的耐温性能较乙烯基硅橡胶要差一些，工作温度范围约为-50250。RVT硅橡胶原材料1腈硅橡胶（NVMQ）腈硅橡胶（NVMQ）主要是在分子链中含有的一种弹性体；其主要特点与氟硅橡胶相似：即耐油、耐溶剂，并具有良好的耐低温性能。RVT硅橡胶原材料1RVT硅橡胶原
5、材料1、按不同特性分1 通用型5低压缩永久变形型 9导电性硅橡胶2 高强度型 6电线、电缆型10热收缩型3 耐高温型 7耐油耐溶剂型11不用二段硫化型4 低温型8阻燃型12海绵硅橡胶RVT硅橡胶原材料1二、硅橡胶的结构1、非极性橡胶2、饱和橡胶3、分子柔顺性好4、能够结晶RVT硅橡胶原材料1三、硅橡胶的性能工作温度范围-100350RVT硅橡胶原材料1硅橡胶硫化胶在自由状态下置于室外数年性能无变化。RVT硅橡胶原材料1硅橡胶的电绝缘性能在受潮、频率变化或温度升高时的变化较小，燃烧后生成的SiO2仍为绝缘体；硅橡胶分子结构中碳原子少，且不用碳黑作填料，所以在电弧放电时不易发生焦烧，因而在高压场合
6、使用它十分可靠；它的耐电晕性和耐电弧性极为良好，耐电晕寿命是聚四氟乙烯的1000倍，耐电弧寿命是氟橡胶的20倍。RVT硅橡胶原材料1硅橡胶的表面能比大多数有机材料低，它具有低吸湿性，长期浸于水中其吸水率仅1左右，物理机械性能不下降，防霉性能良好；此外，它的许多材料不黏，可起隔离作用。硅橡胶无味、无毒，对人体无不良影响，与机体组织反应轻微，具有优良生理惰性和生理老化性。RVT硅橡胶原材料1RVT硅橡胶原材料1硅橡胶和其他高分子材料相比，具有极为优越的透气性；室温下对N2、O2和空气的透过量比NR高3040倍；它还具有对气体渗透的选择性能；对O2的透过性是N2的一倍左右，CO2透过率为O2的5倍左
7、右。RVT硅橡胶原材料1四、硅橡胶的应用硅橡胶可以用于、等；在纺织高温设备以及在碱、次氯酸钠和双氧水浓度较高的设备上作密封材料也取得良好的效益。RVT硅橡胶原材料1RVT硅橡胶原材料1RVT硅橡胶原材料1RVT硅橡胶原材料1Silicon rubber tubeRVT硅橡胶原材料1RVT硅橡胶原材料1Features:Excellent resistance for extreme temperaturesGood resistance to oil and waterSuperior tensile strength, tear strength and compression set Su
8、sceptible to ozone, steam, UV and heatResistant to chemicalsRVT硅橡胶原材料1RVT硅橡胶原材料1Industrial Roller Solutions Temperature and chemical resistance. Excellent adhesion.SILASTIC brand silicone high-consistency rubber (HCR) are ideal for industrial roller applications, including laminating and stretch pin
9、ch, featuring:Excellent resilience Low compression set Good release (low tack) Strong adhesion to metals such as steel, aluminum, chrome plating, and nickel plating can be achieved, enabling use in equipment designed for challenging industrial applications.Release 脱模；Low tack 低的粘着性；Plating 镀层；Challe
10、nging 要求高的；层压 Laminating ； Pinch 捏,拧;夹RVT硅橡胶原材料1General Wire and Cable Solutions Heat stability. Flexibility. Dielectric strength. Flame retardancy. Silastic silicone elastomers offer a unique combination of benefits organic elastomers cannot match, including:Superior dielectric properties Resistanc
11、e to high temperatures, moisture, and oil Excellent all-temperature flexibility coupled with good resilience The ability to match your flammability rating requirements, including flame retardancy, low smoke, and low toxicity The ability to meet international industry standards Flammability rating 燃烧
12、等级 RVT硅橡胶原材料1Automotive Turbocharger & Intercooler Hose Solutions Optimized adhesion. High continuous temperature resistance. Easy processing.Meet challenging temperature and oil-resistance requirements for turbocharger and intercooler hoses Turbocharger 涡轮增压器RVT硅橡胶原材料1RVT硅橡胶原材料1Design fuel connecto
13、rs with performance and processing advantages Proven SILASTIC brand fluorosilicone rubber (FSR) elastomers are the materials of choice for sealing fuel lines that will be exposed to extremely low or extremely high temperatures. They:Resist fuels, oils, and solvents that would degrade organic rubbers
14、 Maintain their mechanical properties over a wider range of temperatures, from -40 to 200CCan be tailored to meet your fuel connector requirements for fuel resistance and swelling characteristics. RVT硅橡胶原材料1Our product is made of silicone rubber, fiberglass textiles as its reinforcing material, and
15、wound wires element or etched foil element. They are constructed using silicone rubber lamination technology and are available in a variety of configurations including: drum heaters, tapes, and blankets of many sizes with and without pressure sensitive adhesives. The silicone rubber heaters are char
16、acterized by their resistance to temperature extremes, moisture, weathering, radiation, fungus, and chemical attack, plus its high dielectric strength, flexibility, and cost effectiveness, and various shapes, holes, cutouts, profiled watt densities, and multiple voltages. The close even spacing of t
17、he wires or etched foil elements ensures a uniform heat distribution over the entire working area. The maximum continuous operating temperature for a silicone rubber heater mat is 250C. Being thin and light weight, silicone rubber heaters have a low Thermal mass and therefore have rapid heat up char
18、acteristics and a fast response to temperature control.Our high quality products at competitive prices coupled with fast delivery times all backed up by a full design and technical service to meet our customers stringent requirements. The product series are suitable for applications where precise he
19、ating is required.SILICONE RUBBER HEATER FEATURES: (1) Precise even heating; (2) Temperature range of -60 to 220continuously;(3) Easily bonded and/or mechanically mounted to heat sink;(4) Optional self adhesive backing (PSA ) and available for thermal insulation backing;(5) Available with either etc
20、hed foil or wire elements;(6) Minimum thickness of 0.5mm;(7) Voltage：From 2 to 600 volts with either AC or DC voltage sources.;(8) Watt Density: Max 10 W/cm2; APPLICATIONS: Thermal developing in graphic imaging equipment; Prevent condensation in motors or instrument cabinets; Freeze or condensation
21、prevention in housings containing electronic equipment, for examples: Traffic signal boxes, Automatic teller machines, Temperature control panels, Gas or liquid control valve housings; Composite bonding processes; Semiconductor process heating; Food service equipment; Airplane engine heaters and Aer
22、ospace industry; Drums and other vessels and viscosity control and asphalt storage; Medical equipment such as blood analyzers, medical respirators, test tube heaters, etc. Curing of plastic laminates; Computer peripherals such as laser printers, duplicating machines.RVT硅橡胶原材料1通用型即一般强度型，采用乙烯基硅橡胶与补强剂等
23、组成；硫化胶物理机械性能属中等强度，拉伸强度为4.96.9MPa，伸长率为200300；是用量最多，通用性最大的一种类型的胶料。RVT硅橡胶原材料1高强度型采用MVQ或低PMVQ橡胶，以比表面积较高的气相白炭黑或经过改性处理的白炭黑作补强剂，并加入适宜的加工助剂和特殊添加剂等综合性配合改进措施，改进交联结构（产生“集中交联”），提高撕裂强度。这种胶料的拉伸强度为7.89.81MPa，扯断伸长率为500%1000，撕裂强度为29.449kNm。RVT硅橡胶原材料1耐高温型采用MVQ或低PMVQ，补强剂的种类和耐热添加剂经适当选择，可制得耐300350高温的硅橡胶。RVT硅橡胶原材料1低温型主要采
24、用低PMVQ，脆性温度达-120，在-90时不丧失弹性。RVT硅橡胶原材料1低压缩永久变形型主要采用MVQ，以乙烯基专用的有机过氧化物作硫化剂，当压缩率为30时，在150下压缩2472小时后的压缩永久变形为7.015（普通硅橡胶为2030）。RVT硅橡胶原材料1电线、电缆型主要采用MVQ，选用电绝缘性能良好的气相白炭黑为补强剂，具有良好的压出工艺性能。RVT硅橡胶原材料1耐油耐溶剂型主要采用腈硅橡胶，一般分为通用型和高强度型两大类。RVT硅橡胶原材料1阻燃型采用MVQ，添加含卤或铂化合物作阻燃剂组成的胶料，具有良好的抗燃性。RVT硅橡胶原材料1导电性硅橡胶采用MVQ，以乙炔炭黑或金属粉末作填料，选择高温硫化，可得到体积电阻系数为2.0102cm的硅橡胶。RVT硅橡胶原材料1热收缩型MVQ中加入具有一定熔融温度或软化温度的热塑性材料，硅橡胶胶料的热收缩率可达3550。RVT硅橡胶原材料1不用二段硫化型采用乙烯基含量较高的MVQ，通过控制生胶和配合剂的pH值，加入特殊添加剂等制得。它的硫化胶（一段）压缩永久变形和普通二段硫化胶压缩永久变形相似，耐热老化性能亦相同。普通硅橡胶不经二段硫化，压缩永久变形为80100，而经二段硫化后降为1050(25024h)。2022-4-25RVT硅橡胶原材料1
