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Vamac® Ultra LT
AEM & 美国杜邦
Vamac® Ultra IP
AEM & 美国杜邦
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| 牌号信息 |
AEM & 美国杜邦 指导价格：暂无 塑料库存： 缺货 
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AEM & 美国杜邦 指导价格：暂无 塑料库存： 缺货
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| 牌号简介 |
与Vamac G相比，杜邦Vamac® Ultra LT聚合物改善了低温性能。Vamac® Ultra LT 27聚合物的Tg比Vamac G的Tg低约12°C。由Vamac® Ultra LT制成的化合物与20 phr增塑剂的Tg为-54°C。不含增塑剂的化合物的Tg为-40°C，该化合物在空气中老化后保持Tg为-40°C。在150°C下6周或在175°C下1周。Vamac® Ultra LT种化合物的耐流体性不如g/gls化合物，但可以通过与vamac g混合来提高耐流体性。与g混合的混合物将具有中低温性能和中间耐流体性。聚合物通常用二胺固化。它也可以用过氧化物固化。橡胶弹性体具有低水平的加工助剂和1.03的名义比重。该聚合物具有温和的丙烯酸气味，且贮存稳定性好。由Vamac® Ultra LT制成的固化化合物具有良好的性能组合，包括适用于最终使用温度的宽操作窗口。不含增塑剂的化合物具有-40°C至165°C的温度窗口，并且该化合物能够承受高达200°C的短期温度峰值。通过添加增塑剂可以改善低温性能，并且对于20 phr增塑剂，初始Tg约为-54°C。固化化合物通常被评定为E级。对于使用ASTM D2000系统的耐热性，这意味着它们将在175°C（347°F）下通过70小时的额定热试验。它们还将在高达165°C（329°F）的温度下通过为期六周的空气老化要求。固化化合物的耐流体性取决于炭黑和增塑剂的含量。在150°C（302°F）下老化168小时后，IRM 903流体的体积膨胀的典型值约为90%。由Vamac® Ultra LT制成的化合物在变速器油和发动机机油中的体积膨胀要小得多。工作流体105（1周/150°C）中的体积膨胀约为50%，而ASTM 1（1周/150°C）中的体积膨胀约为7%。大多数新的发动机机油、变速器油和高温润滑脂比传统的测试油更合成，脂肪含量更高。新的液体也有更低或没有芳香含量。IRM903中的体积膨胀可能不是新流体性能的一个很好的预测因子。基于Vamac® Ultra LT的化合物的压缩设定值在150°C下一周后测量，其范围为20到40%。结果取决于疗效包装、炭黑含量和增塑剂含量。在Vamac® Ultra LT 27化合物上进行的CSR（压缩应力松弛）试验在150°C的机油中显示出非常好的性能，持续6周。保留密封力的百分比是一个相对较高的值，这可能是由于相对较高的体积膨胀。Vamac® Ultra LT化合物与vamac g化合物相比具有更高的值，与vamac gls化合物相比，vamac g化合物具有更高的保留密封力。Vamac® Ultra LT化合物的特性使其非常适合各种汽车应用，包括成型护套、动力总成密封件和垫圈、摇臂盖密封件、变速器油冷却液软管、动力转向软管、涡轮增压器软管、曲轴箱通风管、燃油和冷却液软管的覆盖物、O形圈、套圈和曲柄轴。后减振器。Vamac® Ultra LT是一种无卤聚合物，当暴露在火焰中时不会分解以释放腐蚀性气体。可用于阻燃、低烟、无卤电线电缆护套及无卤、低烟地板。Vamac® Ultra LT化合物非常适合于注射、转移或压缩成型。它们也可以被挤压。 DuPont™ Vamac® Ultra LT polymer has improved low-temperature properties compared to Vamac® G. The Tg for Vamac® Ultra LT polymer is about 12°C lower than the Tg for Vamac® G. A compound made from Vamac® Ultra LT with 20 phr of plasticizer has a Tg of -54°C. A compound without any plasticizer has a Tg of -40°C and that compound maintains that Tg after aging in air for six weeks at 150°C or for one week at 175°C. The fluid resistance of Vamac® Ultra LT compounds is not as good as the G/GLS compounds, but resistance can be improved by blending with Vamac® G. The blends with G will have intermediate low-temperature performance and intermediate fluid resistance. The polymer is typically cured with a diamine. It can also be cured with a peroxide. The gum elastomer has a low level of a processing aid and a nominal specific gravity of 1.03. The polymer has a mild acrylic odor and the storage stability of the polymer is excellent. Cured compounds made from Vamac® Ultra LT have a good combination of properties including a wide operating window for end use temperatures. A compound with no plasticizer has a temperature window of -40°C up to 165°C and the compound can withstand short term temperature spikes up to 200°C. The low temperature properties can be improved by the addition of a plasticizer, and with 20 phr of plasticizer the initial Tg is about -54°C. The cured compounds are typically rated as class E for heat resistance using the ASTM D2000 system and this means that they will pass a heat rating test of 70 hours at 175°C (347°F). They will also pass a six week air aging requirement at temperatures as high as 165°C (329°F). The fluid resistance of a cured compound depends on the carbon black and plasticizer level. A typical value for volume swell in IRM 903 fluid after aging for 168 hr at 150°C (302°F) is about 90%. The compounds made from Vamac® Ultra LT have much lower volume swell in transmission fluid and in engine oils. The volume swell in Service Fluid 105 (1 week/150°C) is about 50% and the volume swell in ASTM #1 (1 week/150°C) is about 7%. Most of the newer engine oils, transmission fluids, and high temperature greases are more synthetic and have higher aliphatic content than conventional test oils. The newer fluids also have much lower or no aromatic content. The volume swell in IRM903 may not be a good predictor for performance in the newer fluids. The compression set values for compounds based on Vamac® Ultra LT were measured after one week at 150°C and the range in values is from 20 to 40%. The results depend on the curative package, the level of carbon black and the level of plasticizer. CSR (Compressive Stress Relaxation) tests run on Vamac® Ultra LT compounds exhibit very good properties for six weeks at 150°C in engine oils. The percent retained sealing force is a relatively high value and this is probably due to the relatively high volume swell. The Vamac® Ultra LT compounds have higher values compared to the Vamac® G compounds which in turn have higher retained sealing forces compared to Vamac® GLS compounds. The properties of Vamac® Ultra LT compounds make them well suited for a wide range of automotive applications, including, molded boots, powertrain seals and gaskets, rocker cover seals, transmission oil coolant hoses, power steering hoses, turbocharger hoses, crankcase ventilating tubes, coverings for fuel and coolant hoses, O-rings, grommets and crankshaft dampers. Vamac® Ultra LT is a halogen free polymer and does not decompose to give off corrosive gases when exposed to flame. It can be used for flame retardant, low-smoke, non-halogen wire and cable jackets and in non-halogen, low smoke flooring. Vamac® Ultra LT compounds are well suited for injection, transfer or compression molding. They also can be extruded. |
最新的制造技术使AEM级聚合具有优化的结构和化学成分，这比现有标准杜邦VAMAC弹性体提供了显著的改进。这些级别被指定并作为vamac-ultra销售，为目标应用程序的可处理性、性能和客户价值提供真正的步骤变更改进。Vamac® Ultra IP（开发名称：VMX-3040）是第一个商业化的超家族产品。在开发阶段，一个目标是确定在注塑过程中性能比Vamac G有所改善的产品，以减少模具清洗的频率。与标准AEM等级相比，Vamac® Ultra IP 27的高粘度能更好地混合化合物，并提高化合物的绿色强度，有助于避免挤压过程中的塌陷。优化的聚合物结构确保了物理性能的提高，从而改善了密封件、阻尼器和挤压软管等橡胶部件的性能。低磨损值允许在动态密封中长期使用Vamac® Ultra IP。Vamac® Ultra IP的最佳物理性能是在硬度范围为50至90邵尔A的橡胶零件中获得的。使用Vamac® Ultra IP比使用适当的配合物的标准AEM更容易实现该硬度范围的扩展。Vamac® Ultra IP结合了1000小时（六周）内175°C的耐干热性和对汽车润滑油的良好耐受性。最高温度200°C的暴露时间可达4天。同时-31°C的热失重提供了很好的低温灵活性。良好的压缩永久变形和压缩应力松弛特性使Vamac® Ultra IP成为密封应用的最佳选择。在汽车曲轴箱通风系统和风道中具有良好的抗窜气性（热空气、酸、油和汽油烟雾），加上增加的动态阻力是Vamac® Ultra IP的附加属性。像其他等级的VAMAC一样，Vamac® Ultra IP是无卤的。 The latest manufacturing technology allows polymerization of AEM grades with optimized structure and chemical composition, which provides significant improvements over the existing standard DuPont ™ Vamac® elastomers. These grades, designated and sold as Vamac® Ultra, provide true step-change improvement in processability, performance and customer value for targeted applications. Vamac® Ultra IP (developmental name VMX-3040) is the first of the Ultra family products to be commercialized. During the development phase, a goal was to identify a product having improved performance in injection molding processes compared to Vamac® G to reduce the frequency of mold cleaning. The high viscosity of Vamac® Ultra IP compared to standard AEM grades results in better mixing as well as increased green strength of compounds, and helps to avoid collapse during extrusion processes. The optimized polymer structure ensures gains in physical properties resulting in improved performance of rubber parts such as seals, dampers and extruded hoses. Low abrasion values may allow extended use of Vamac® Ultra IP in dynamic seals. The best physical properties of Vamac® Ultra IP are obtained in rubber parts having a hardness range between 50 and 90 Shore A. Extensions of this hardness range may be more easily achieved with Vamac® Ultra IP than standard AEM using appropriate compounding. Vamac® Ultra IP combines dry heat resistance of 175 °C over a period of 1000 h (six weeks) with very good resistance to automotive lubricants. Exposure of peak temperatures of 200 °C are possible for up to four days. At the same time, the Tg of -31 °C provides very good low temperature flexibility. Good compression set and compressive stress relaxation properties make Vamac® Ultra IP an excellent choice for sealing applications. Good resistance to Blow-By (hot air, acids, oil and petrol fumes), present in automotive crankcase venting systems and air ducts combined with increased dynamic resistance are additional attributes of Vamac® Ultra IP. Like every other grade of Vamac® , Vamac® Ultra IP is halogen-free. |
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| 产品描述 | |||
| 厂家： | 美国杜邦 DuPont | 美国杜邦 DuPont | |
| 类别： | AEM AEM | AEM AEM | |
| 填料： | |||
| 用途： | 管件,垫圈,密封件,管道,汽车领域的应用 | 汽车领域的应用,管件,密封件 | |
| 性能特点： | 耐低温,无卤,耐高温 Antifreeze,Halogen free,High Heat Resistance | 高粘度,硬度高,无卤,耐高温,耐低温柔性,耐磨,耐化学性 High Viscosity,Good Hardness,Halogen free,High Heat Resistance,Low temperature toughness,Good wear resistance,Solvent resistance | |
| 加工条件： | 挤出 Extrusion | 复合 | |
| 备注 |
1 一般属性：这些不能被视为规格。
2 20 phr plasticizer
3 Target
4 C 模具
5 1 Hz
6 20 phr plasticizer, 1 Hz
7 after 1 week in SF105, 20 phr plasticizer
8 after 1 week in ASTM #1
9 after 1 week in ASTM #1, 20 phr plasticizer
10 after 1 week in SF105
11 after Air Aging, 6 weeks
12 after Air Aging, 6 weeks, 20 phr plasticizer
13 after Air Aging, 1 week, 20 phr plasticizer
14 after Air Aging, 1 week
15 20 mins/0.5 degree arc, 20 phr plasticizer
16 20 mins/0.5 degree arc
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1 一般属性：这些不能被视为规格。
2 Results on Heat Ageing of Three 60 Shore A Compounds
3 168 hrs, Ageing in Petro Canada Dexron® VI
4 504 hrs, Ageing in Lubrizol® OS 206304 , 5W40
5 A方法，裤形试样
6 12 mm molded disks
7 0.5deg / 12 min
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价格走势对比图
AEM Vamac® Ultra LT
AEM Vamac® Ultra IP
| 型号 | 类别 | 厂家 | 产地 | 颜色 | 首期使用量 | 后期使用量 | 包装 | 交期 | 成型产品 | 操作 |
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| GP-525N | GPPS | VATAA土耳其地区 | 亚太地区 | 天 |
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