钴盐粘合增进剂的生产与需求分析

简述钻盐粘合增进剂品种的发展,介绍新癸酸钻和硼酰化钴的制备工艺。概述世界和我国钴盐粘合增进剂的供需情况,2012年世界钴盐粘合增进剂需求量约1．8万t;根据我国子午线轮胎的产量测算,2012年我国钴盐粘合增进剂的产能已达到1万t,消费量超过6000t。我国钴盐粘合增进剂企业应重视钴盐粘合增进剂产品的升级换代。     

钴粉对钴盐粘合增进剂质量影响的探讨

橡胶与金属骨架材料高强度粘合所用的粘合剂主要为钴盐型粘合增进剂,其质量对橡胶制品的质量有很大的影响。目前,国内钴盐粘合剂生产方法,根据碱式碳酸钴状态的不同,分为湿法生产和干法生产两种。本文将分别就钴源的状态及钴粉的质量和水平对钴盐粘合剂制造过程和对产品质量的影响进行探讨。     

钴盐粘合增进剂在轮胎胎圈胶中的应用

探讨几种钴盐粘合增进剂对轮胎胎圈胶性能，特别是对粘合性能的影响。添加钴盐粘合增进剂硫化胶的硬度和300％定伸应力有增大趋势，动态性能略有提高，轮胎胎圈胶与胎圈钢丝的粘合强度显著提高，从而提高了轮胎产品的整体质量。过量添加粘合增进剂会降低胶料的老化后性能，应用时应特别注意选择适当的用量。     

差示扫描量热法在钴盐粘合增进剂热稳定性分析中的应用

采用差示扫描量热(DSC)法研究钴盐粘合增进剂硼酰化钴、癸酸钴和硬脂酸钴的热稳定性,用Ozawa方程和Kissinger方程计算活化能。结果表明:根据DSC曲线,用Ozawa方程和Kissinger方程求得的钴盐粘合增进剂的活化能相近,线性相关因数都在0.998以上;3种钴盐粘合增进剂热稳定性从高到低依次为硼酰化钴、癸酸钴、硬脂酸钴。DSC法测定橡胶助剂的热稳定性具有快速、准确和高效的特点。     

Manobond钴盐粘合增进剂的特点及作用

介绍了罗地亚英国Manchem有限公司生产的Manobond 系列钴盐粘合增进剂的特点。分析了在镀黄铜钢丝粘合橡胶配方中硼酰化钴Manobond 6 80C、树脂体系、硫黄、白炭黑和硬脂酸等添加剂用量对胶料粘合性能的影响 ,推荐一种可获得最佳综合性能的配合 :硫黄　 5 ;硼酰化钴Manobond 6 80C　 0 15 ;间苯二酚 /甲醛树脂　 2 ;白炭黑　 10 ;硬脂酸　 0 5。但指出这只是一种基本原则 ,若性能要求有变化 ,尚需根据配方、工艺及所用钴盐种类做具体调节     

钴盐在钢丝帘线粘合体系中的应用

对不同粘合体系，不同牌号钴盐在全钢子午线轮胎中的应用进行了探讨。结果表明。间甲白钴复合粘合体系综合性能最佳。不同钴盐对胶料物性和初始粘合无明显影响，硼酰化后的粘合保持率和覆胶率明显高于其它钴盐，尤其是耐汽老化和盐水老化性能较好。正交设计得出粘合体系主要因素最佳用量组合为间苯二酚1.5，粘合增进剂6，硫黄6.5，硼酰化钴1.1，大料及产品试验结果表明，优选配方达到技术指标和产品使用性能要求。     

征和化工钴盐粘合增进剂生产新工艺获国家发明专利

朝阳市征和化工有限公司自主开发的钴盐粘合增进剂生产新工艺于2006年2月获得国家发明专利（ZL200310105264．5）。 钴盐粘合增进剂用于子午线轮胎、钢芯输送带、钢丝增强橡胶管、橡胶密封件、橡胶减震器等橡胶一金属复合制品的生产中。目前，国内橡胶行业所用钴盐产品70％依赖进口。     

国内最大钴盐粘合增进剂生产线投产

我国最大的年产500t钴盐粘合增进剂生产线于2006年8月26日在宜兴市卡欧化工有限公司一次试车成功，投入工业化生产。该生产线的生产设备和工艺流程全部采用自主技术，可生产全部4种钴盐粘合增进剂，这将大大加快橡胶制品原材料国产化的步伐。     

钴盐对钢丝帘线与橡胶粘合性能的影响

对环烷酸钴，硼酰化钴，新癸酸钴等钴盐粘合增进剂对高和低铜质量分数钢丝帘线与橡胶粘合性能的影响进行了研究。结果表明，胶料中加入钴盐能够提高强伸性能和与钢丝帘线的初始粘合唱 力及耐盐水老化能力。     

粘合增进剂硼酰化钴-镍的制备与性能研究

以硫酸钴与硫酸镍为原料制备两种新型粘合增进剂硼酰化钴-镍产品GN007和GN008,并与硼酰化钴产品RC-B23进行性能对比.结果表明,新型硼酰化钴-镍产品GN007和GN008胶料的物理性能及粘合性能均达到RC-B23胶料水平,且原料成本降低约20%.     

高级汽车修补腻子生产工艺的研究

探讨了高级汽车修补腻子的性能与主要成膜物、颜料、填料、固化剂、促进剂的关系,然后设计出以不饱和聚酯树脂、苯乙烯、滑石粉、碳酸钙、碳酸钡、环烷酸钴、过氧化环己酮等为原材料的汽车用腻子配方,通过引发和交联反应及轧浆、分散等机械加工,制备出具有干透性好、附着力高、易打磨等优良性能的腻子,在高级汽车修补方面具有广阔的应用前景.     

Adhesion between rubber compounds and ternary-alloy-coated steel cords. Part II: Effects of sulfur and cobalt salt in rubber compounds

The adhesion properties between rubber compounds with different amounts of cobalt salt and sulfur and ternary-alloy-coated steel cord with 2 wt% cobalt plating amount were investigated to understand the effects of cobalt salt and sulfur in rubber compounds on their adhesion characteristics to the ternary-alloy-coated steel cord. The adhesion properties of the rubber compounds to ternary-alloy-coated steel cord were largely dependent on the amounts of both cobalt salt and sulfur in the rubber compounds. The pull-out force of adhesion sample increased significantly with increasing concentration of cobalt salt in the rubber compound with constant sulfur loading, while it decreased slightly with increasing sulfur into the rubber compound with constant cobalt salt loading. Adhesion retention after various hostile aging treatments improved in the rubber compounds incorporating both cobalt salt and high loading of sulfur. The interphases between the rubber compounds and the ternary-alloy-coated steel cord studied using AES showed stable adhesion patterns by incorporating cobalt salt, resulting in enhancement of the adhesion retention.     

Enhancing the Adhesion Retention by Controlling the Structure of the Adhesion Interphase Between Rubber Compound and Metal. Part I. Effect of Cobalt Salt

The adhesion between cobalt salt-containing rubber compounds and brass-plated steel cords was studied to understand the role of cobalt salt as an adhesion promoter. An improvement in adhesion was shown with the low loading of cobalt salt in the range 0.5–1 phr, while a significant decline in adhesion was observed with high loading at 2 phr and a long aging time of 15 days under humidity aging. The adhesion interphase between the rubber compound and the brass-plated steel cord studied using Auger electron spectroscopy (AES) showed stable depth profile by cobalt salt incorporation at low loading, resulting in the enhancement of the adhesion retention. For the high loading of cobalt salt, adhesion interphase grew excessively, especially ZnO layer formed under humidity aging, which resulted in reduced adhesion.     

湿法癸酸钴在全钢子午线轮胎钢丝带束层胶中的应用

研究湿法工艺生产的癸酸钴在全钢子午线轮胎钢丝带束层胶中的应用效果，并与干法工艺生产的癸酸钴进行对比。结果表明，与干法工艺生产的癸酸钴相比，采用湿法工艺生产的癸酸钴可提高NR硫化胶的H抽出力，经热空气老化和盐水老化后硫化胶的H抽出力下降率较小，其它物理性能基本相当。     

粘合体系对全钢载重子午线轮胎胎体钢丝粘合胶性能的影响

研究3种粘合体系对全钢载重子午线轮胎胎体钢丝粘合胶性能的影响。试验结果表明,单独使用钴盐粘合体系,癸酸钻用量以0．5和1份为宜;单独使用间一甲粘合体系,间苯二酚-80用量以1．25份、粘合剂RA用量以4和5份为宜;两种粘合体系配合使用进行配方优选,钴盐用量为0．5份,间苯二酚-80用量为1．25份,粘合剂RA用量为4份,胶料的各项性能达到最优。采用优选配方进行生产,胶料的工艺性能良好,成品轮胎耐久性能超过国家标准要求。     

Adhesion and adhesion degradation of a pressure sensitive tape on carbon steel

Corrosion protection of carbon steels by organic coatings is dependent on a good adhesion between coating and substrate. In this work the blister test method was used to study the adhesion of a pressure sensitive tape applied on carbon steel. Deionized water was used to pressurize a blister formed by the tape covering a through-hole in the steel substrate. Values of adhesion strength as measured by the strain energy release rate were determined for two different blister pressurization rates or water injection rates. The adhesion strength was higher for the larger injection rate, which is expected for pressure sensitive tape. These values were probably overestimates of the true adhesion strength owing to plastic yielding of the membrane. Resistance to adhesion degradation near coating defects or macroscopic scribes was characterized using a height regulating scanning Kelvin probe on samples exposed to sodium chloride solution or a salt spray environment. Although the tape exhibited good barrier properties to water and ions, cathodic delamination was observed near the scribe after salt spray exposure. Wet/dry cycles were more aggressive than continuous salt spray exposure, since during continuous exposure corrosion products are washed away. It was observed that the oxide layer grows to a larger extent during wet/dry cycles; therefore, acceleration of the delamination process is probably associated with a “wedge effect” of the oxide on the interface.     

Braking behaviours of C/C–SiC mated with iron/copper-based PM in dry,wet and salt fog conditions

C/C–SiC composites have enormous potential as a new generation of brake materials. It is worth studying the friction and wear behaviours of these materials in special environments to ensure the safe and effective braking of trains in practical applications. In this study, the braking behaviours and wear mechanisms of C/C–SiC mating with iron/copper-based PM in dry, wet and salt fog conditions are compared in detail. The results show that the coefficient of friction (COF) in the wet condition is reduced by 14.13% compared with that under the dry condition. The COF value of the first braking under salt fog condition is increased by 12.27% and 30.75% compared to the dry and wet conditions, respectively. Additionally, the tail warping phenomenon of the braking curve disappears in wet condition, which is attributed to the weak adhesion of friction interfaces and the lubrication of the water film. The main wear mechanisms of C/C–SiC mating with iron/copper-based PM under dry condition are adhesive, fatigue and oxidation wear. However, the dominant wear in wet condition is abrasive wear. The cooling and lubrication of water reduce the tendency of thermal stress, and weaken adhesive and fatigue wear. Furthermore, salt fog can accelerate the corrosion of alloy friction film, leading to the damage of friction film. Meanwhile, the third body particles formed in salt fog condition participate in the braking process. The wear mechanisms in salt fog condition are dominated by abrasive and delamination wear.