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硫化促进剂DM的合成 总被引:3,自引:0,他引:3
<正> 1 前言 DM(二硫化二苯并噻唑)是一种性能优良的噻唑类橡胶硫化促进剂。与其他秋兰姆类、胍类、二硫带氨基甲酸盐类、次磺酰胺类等促进剂相比,噻唑类硫化促进剂具有快速硫化,硫化曲线平坦,物理性能好,操作安全可靠的特点。在噻唑类促进剂中,DM因有两个促进基和一个防焦基团,具有焦烧时间长、毒性小的优点,是目前国内外应用最为广泛的硫化促进剂之一。其合成方法主要是以促进剂M为原 相似文献
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本文叙述加工促进剂在橡胶工业中的广泛应用。同时还举例说明塑炼/混炼工艺对加工促进剂的基本需求,例如,加工促进剂降低胶料粘度,从而减少混炼能量或时间。另外,加工促进剂保证填充剂具有良好的分散性/混合性,赋予胶料良好的粘弹性质。加工促进剂将得到更进一步的广泛应用。正如我们所知道的那样,加工促进与润滑/均匀剂一样,以改善挤出和注压性能为目的。 相似文献
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随着各种形式的洗衣机进入家庭,人们对日用洗涤用品的要求也愈来愈高,不仅要求去污力强,还要求洗后留有香味且使用方便,为此我们开展了复配留香型洗衣液的研制。 相似文献
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橡胶粘合促进剂的研制与开发 总被引:1,自引:0,他引:1
本文评述了钴盐橡胶合促进剂的研究进展,比较了各种粘合促进剂对橡胶-钢丝帘线的粘合性能,成功地研制开发了一种新型橡胶粘合促进剂,其主要性能指标与国际上著名的橡胶粘合促进Manobond680C基本一致,是一咱高附加值精细化工产品。 相似文献
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Roberta M. Mariano Helson M. da Costa Marcelo R. L. Oliveira Mayura M. M. Rubinger Leila L. Y. Visconte 《应用聚合物科学杂志》2008,110(4):1938-1944
A conventional vulcanization system containing tetrabutylammonium bis(4‐methylphenyldithiocarbimato)zincate(II) (ZNIBU) was used for curing of natural rubber (NR) compounds. Rheometric (ts1, t90, and CRI) and mechanical properties, such as tensile and tear strengths and modulus at 300%, were measured to evaluate the acceleration potential of ZNIBU. Commercial accelerators (TMTD, MBTS, and CBS) and a binary system CBS/ZNIBU were also tested for comparison purposes. It was observed that ZNIBU alone does not give either safe scorch time or cure rates appropriate for industrial applications. Nevertheless, mechanical properties are comparable to those given by the other accelerators used. As for the binary system, positive synergistic effects can be found in tear strength and modulus of NR vulcanizates. Besides, ZNIBU does not contribute for the formation of nitrosamines in the vulcanization process. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2008 相似文献
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用附着型促进剂PBS在机械混炼插层法的基础上制备了天然橡胶/蒙脱土纳米复合材料。由于硫化后大部分促进剂基团都连在橡胶分子链上,因此用分子一端能和蒙脱土片层有相互作用的附着型硫化促进剂,可以大大增强蒙脱土和橡胶基体的相互作用,得到性能优良纳米复合材料。用PBS制备纳米复合材料其硫化体系活性能低,硫化胶交联密度增大,有机蒙脱土片层在橡胶基体中达到纳米级的分散,具有优良的力学性能,加入8%有机蒙脱土100%模量从1.2 MPa增至2.2 MPa,500%模量从8.12 MPa增至18.23 MPa,邵氏GA硬度从45增至55,而加入2%有机蒙脱土500%模量从8.12 MPa增至17.06 MPa,撕裂强度从36.31 kN/m增至43.65kN/m,加入2~10份有机蒙脱土时其效果相当于加入40份半补强炭黑。 相似文献
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介绍了几种防晒化妆品的包装及包装新材质。论述了目前防晒品包装的特点、包装潮流、包装分配体系的创新、包装材质的改进、变化多样的产品的外形及发展趋势。指出消费者对防晒产品使用的便捷性需求将是未来防晒化妆品包装的一个发展方向。 相似文献
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介绍了橡胶硫化促进剂TBBS 及其原料叔丁胺国内外状况及工艺路线。促进剂TBBS不会产生毒性物质亚硝胺。因此, 它将是一个很有发展前途的产品。 相似文献
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橡胶促进剂NOBS废水处理工程实践 总被引:3,自引:0,他引:3
采用蒸发-催化氧化预处理橡胶促进剂NOBS废水,在进水COD≤20000mg/L情况下,预处理后COD约为1000mg/L.达到了预期处理效果。 相似文献
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Natural rubber was vulcanized with a new binary accelerator system based on 1‐phenyl‐2,4‐dithiobiuret (DTB) and dicyclohexyl benzothiazyl sulfenamide. A significant reduction in cure time was observed with the addition of DTB. The cure kinetics was investigated and the activation energy was determined. The mechanical properties were improved by adding DTB, and the maximum values are shown at an optimum concentration. Estimates of the concentration of crosslinks and of the relative proportions of different types of crosslinks were made by the chemical characterization of the vulcanizates. The crosslink densities obtained from swelling measurements and stress–strain measurements were compared with those obtained from modulus measurements. All of them follow a similar trend and support the observed mechanical properties. A dynamic mechanical analysis of the mixes was carried out and the activation energy was determined from Arrhenius plots. The glass‐transition temperature was found to increase with the increase in crosslink density and frequency of measurements. The stress–strain curves were found to not deviate from the strain crystallizing nature of natural rubber. The mechanical properties, network characterization, and processing characteristics were used to optimize the DTB concentration. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 87: 2193–2203, 2003 相似文献