不溶性硫黄Crystex Cure Pro在轿车轮胎带束层胶中的应用

研究不溶性硫黄Crystex Cure Pro在轿车轮胎带束层胶中的应用。结果表明，在轿车轮胎带束层胶中以不溶性硫黄Crystex Cure Pro替代不溶性硫黄HD OT20，可以缩短胶料的混炼时间，延长门尼焦烧时间，不溶性硫黄的高温热稳定性和分散性提高。     

不溶性硫黄Cure Pro在全钢子午线轮胎带束层胶中的应用

研究不溶性硫黄Cure Pro在全钢子午线轮胎带束层胶中的应用。结果表明，以Cure Pro等硫量替代不熔性硫黄HD OT20，硫黄在胶料中的分散度提高，混炼胶的加工安全性提高，硫化胶的钢丝粘合力增强，成品轮胎的使用寿命延长，生产成本降低。     

伊士曼Crystex~(TM) Cure Pro助力中国轮胎产业革新

<正>2017年10月19日,在2017年轮胎行业经营管理论坛(杭州)上,全球领先的化工公司伊士曼推出一款全新不溶性硫黄产品Crystex~(TM) Cure Pro,开创传统化学品创新推动轮胎产业效率提升的新篇章。伊士曼橡胶添加剂业务亚太区总监陈家胜全面介绍了Crystex~(TM) Cure Pro这款为轮胎制造商全新打造的不溶性硫黄产品及相关配套技术与服务体系。与传统不溶性硫黄产品相比,Crystex~(TM) Cure Pro系列不溶性硫黄具有优异的分散性、更高的热稳定性、更好的流动性、产品充油量小而硫黄     

伊士曼新一代不溶性硫黄Crystex Cure Pro

伊士曼新一代不溶性硫黄Crystex Cure Pro     

在翻修轮胎用的橡胶中应用不溶性硫黄的特点

在轮胎生产和轮胎翻修的实践中,广泛应用不溶性硫黄作为硫化剂。国外许多公司采用不溶性硫黄制备轮胎翻修材料,尤其是在胎面胶和布层胶中应用甚广。已知不溶性硫黄可以改善胶料的工艺性能。与普通斜方硫黄的不同点是,不溶性硫黄不会喷出到胶料表面,可保证胶料均匀並保持粘附性能。     

预分散不溶性硫黄与普通不溶性硫黄分散性能对比

研究了预分散不溶性硫黄与普通不溶性硫黄在胶料中的分散程度和分散均匀性的差异。试验结果表明 ,加入 1 5份预分散不溶性硫黄的胶料与加入 1 8份普通不溶性硫黄的胶料物理性能接近 ;硫化仪数据表明预分散不溶性硫黄在胶料中具有较好的分散性能 ,加入预分散不溶性硫黄的胶料经 10 0℃× 48h老化后拉伸强度、扯断伸长率及撕裂强度均有所提高     

国产不溶性硫黄HD OT25在全钢载重子午线轮胎过渡层胶中的应用

研究国产不溶性硫黄HD OT25替代进口不溶性硫黄HD OT20在全钢载重子午线轮胎过渡层胶中的应用。结果表明:国产不溶性硫黄HD OT25的热稳定性以及在胶料中的分散速度和分散性与进口不溶性硫黄HD OT20相当;使用国产不溶性硫黄HD OT25的过渡层胶性能与使用进口不溶性硫黄HD OT20的过渡层胶相当,不会出现喷霜现象,国产不溶性硫黄HD OT25可完全替代进口不溶性硫黄HD OT20,有效降低胶料成本。     

不溶性硫黄的分散性研究及其对钢丝带束层胶性能的影响

研究不同生产工艺的不溶性硫黄在钢丝带束层胶中的分散效果及其对胶料性能的影响。结果表明：采用不同生产工艺的不溶性硫黄对胶料的加工性能和硫化胶的物理性能无明显影响,但对不溶性硫黄的分散性及硫化胶的钢丝粘合力影响较大;采用连续法生产工艺的不溶性硫黄的热稳定性及其在胶料中的分散性较好,可显著提高硫化胶的钢丝粘 合力。     

高温下不溶性硫黄稳定性的测定方法

高温下不溶性硫黄稳定性的测定方法刘文英肖秀梅（桦林集团有限责任公司１５７０３２）硫黄是生产轮胎的重要原材料之一,使用可溶性硫黄,胶料易喷硫且粘合性能较差,而采用不溶性硫黄则可改善胶料的粘合性能。但是,不溶性硫黄的性质不稳定,易转变为可溶性硫黄,因此测...     

新型不溶性硫黄CURE PRO在半钢子午线轮胎胎体胶中的应用

介绍新型不溶性硫黄CURE PRO在半钢子午线轮胎胎体胶中的应用。结果表明:不溶性硫黄CURE PRO的元素硫质量分数比不溶性硫黄HD OT20增大10%以上,热稳定性提高;不溶性硫黄CURE PRO替代不溶性硫黄HD OT20用于半钢子午线轮胎胎体胶中,其实际用量可减小,胶料分散性改善,胶料在混炼和存放过程中焦烧现象减少,物理性能提高,与钢丝骨架材料粘合性能好。     

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.     

CURE CHARACTERISTICS AND MECHANICAL PROPERTIES OF NATURAL RUBBER/RECLAIMED RUBBER BLENDS

Cure characteristics and mechanical properties of natural rubber/reclaimed rubber blends were studied. The minimum torque values of the blends were lower than that of the gum compound. The (maximum–minimum torque) and scorch time decreased with increasing reclaim content. The cure rate of the blends were lower than that of the virgin compounds. The tear strength was improved by the addition of reclaimed rubber. Tensile strength, elongation at break, and resilience decreased with increasing reclaim loading. The heat buildup was higher for the blends.     

不同粒径胶粉的成分分析及在胎面胶中的应用

通过热重法和红外光谱分析及测定硫含量和粒径分布等方式对用超低温粉碎法制备的不同粒径胶粉的成分进行了分析,并开展了其在商用车轮胎胎面胶中的加工应用研究。结果表明,4种不同胶粉中的挥发分、有机物、炭黑和灰分含量均差别较小,其中有机物质量分数在61%～65%之间,炭黑质量分数在28%～30%之间,含硫质量分数在2%左右,粒径从小到大依次为牌号K 0004、K 0002-R、W 0004和W 0406的胶粉。在商用车胎面胶中添加10份（质量）胶粉,混炼胶的门尼黏度增大,门尼焦烧时间缩短,硫化速率加快。胶粉粒径越小其对硫化胶物理机械性能的影响越小,而硫化胶损耗因子的变化与胶粉粒径的相关性较小。     

Styrene butadiene rubber/reclaimed rubber blends

Cure characteristics and mechanical properties of styrene butadiene rubber reclaimed rubber blends were studied. The blends showed improved processability, as indicated by the minimum torque values. Cure characteristics like minimum torque, (maximum-minimum) torque, cure time and cure rate decreased in the presence of reclaimed rubber. Tensile strength, tear strength, elongation at break were higher for blends. Resilience decreased with reclaim content. Compression set and abrasion loss were higher in the blends.     

Effect of bound rubber on characteristics of highly filled styrene–butadiene rubber compounds with different types of carbon black

Viscosity and cure time of a filled rubber compound having an accelerated sulfur cure system are affected by types and contents of the rubber and the filler as well as of the curatives. Bound rubber content is used as level of the reinforcement. Influence of bound rubber on viscosity and cure time of a rubber compound was studied using highly filled styrene–butadiene rubber compounds with carbon black having different structures. The bound rubber content increases with increase of the carbon black content and also increases as the carbon black structure is developed. The Mooney viscosity increases linearly with increase of the bound rubber content irrespective of the carbon black structure when the primary particle size of carbon black is nearly the same. The Mooney scorch time decreases linearly with increase of the bound rubber content irrespective of the carbon black structure. © 2004 Wiley Periodicals, Inc. J Appl Polym Sci 93: 1001–1006, 2004     

公交车轮胎胎面胶成分研究

选择三个不同厂家相同规格(即275/70R22.5)的轮胎,对胎面胶进行化学组分剖析,检测项目有胶型、胶比、含胶率、炭黑含量、灰分、结合硫含量、金属含量、有机配合剂定性、多环芳烃检测等二十多个项目,采用裂解气相色谱仪、裂解气相色谱质谱联用仪、红外光谱仪、核磁共振光谱仪、原子吸收光谱仪等大型设备。对剖析结果进行深入分析,明确不同厂家在轮胎胎面胶组分涉及的不同目的。     

Effect of Tetrachlorobenzoquinone on the Adhesion between Rubber Compound and Brass-plated Steel Cord

The adhesion between tetrachlorobenzoquinone (TCBQ)-loaded rubber compound and brass-plated steel cord was studied to understand the role of TCBQ as an adhesion promoter. With loading of TCBQ in the rubber compound the cure rate became slow, but the change in physical properties was not significant. An improvement of the adhesion was obvious with low loading of TCBQ at the range of 0.5 phr while an adverse effect was observed with high loading at 2 phr. The addition of TCBQ for the improvement of adhesion has a greater effect before aging because TCBQ contributes to form a large surface area of copper sulfide via accelerated copper diffusion into the rubber bulk. However, higher TCBQ loading as well as longer aging time leads to a great extent of copper migration into the rubber and excess growth of zinc oxide layer, resulting in decreased adhesion. The adhesion interphase before aging, between a thin brass film and a rubber compound, investigated using AES showed no difference except that sulfur increased with increasing TCBQ loading. On the other hand, the adhesion inter-phase was changed after humidity aging. The copper content decreased at the adhesion interphase while it increased in the rubber layer with increasing addition of TCBQ.     

Promotion effect of a chlorotriazine derivative on the adhesion between rubber compounds and a brass-plated steel cord

The adhesion between chlorotriazine derivative (TZ)-loaded rubber compounds and a brass-plated steel cord was studied to understand how TZ acted as an adhesion promoter. With the loading of the rubber compound with TZ, the cure rate became slow, but changes in the physical properties were not significant. An improvement in adhesion was obvious at a low TZ loading ranging from 0.5 to 2.0 phr. An adverse effect was observed with high loadings up to 8 phr and aging treatments for 15 days. Since the concentration of sulfur in the interphase of the rubber compound/ brass film adhesion samples after humidity aging was high for the rubber compound with high loadings of TZ, the acceleration of sulfide formation by TZ loading was confirmed. Lack of oxygen in the interphase indicated the conversion of zinc oxide to zinc sulfide in the rubber compound containing TZ. The control of zinc oxide formation in the adhesion interphase by TZ is suggested to be the reason for the adhesion promotion by TZ.     

Devulcanization of Natural Rubber Vulcanizates by Mechanochemical Process

Using a suitable disulfide-based devulcanizing agent, which cleaved the sulfur cross-links in vulcanized rubber at high temperature, devulcanization of gum natural rubber was carried out. High sulfur and medium sulfur, as well as low sulfur–containing rubber vulcanizates were used to study the cleavage of sulfidic bonds. The cure characteristics and mechanical properties of vulcanized natural rubber and revulcanized natural rubber were studied. Thermal properties of the rubber were analyzed by thermogravimetric analysis (TGA), which indicates that the onset degradation temperature further increased on revulcanization with higher amount of disulfide. The properties of the revulcanized natural rubber increased with increasing disulfide concentration, also the mechanical properties of the devulcanized natural rubber were increased by decreasing the sulfur content in the original rubber vulcanizate. From the rheometric study increases in optimum cure time were observed when ground rubber vulcanizates were treated with higher amounts of disulfide. The scanning electronic microscopy (SEM) study suggested the change in failure mechanism as influenced by the type of cross-linking present and the devulcanizing agent used. From infrared (IR) spectroscopy it was observed that the oxidation of the main polymeric chain did not occur at the time of high temperature milling.     

Cure Characteristics and Thermal Properties of Sulfur-Cured EPDM-Based Composites by Compounding with Layered Nano-Organoclays

Organoclay was compounded with ethylene-propylene-diene-monomer (EPDM) using a two roll mill and cured by conventional sulfur curing system. The organoclay content was progressively increased from 0 to 10 parts per hundred of rubber (phr) of the EPDM rubber. Cure characteristics were carried out on an Ekktron moving die rheometer. It has been found that cure and scorch time were decreased with organoclay loading. On the other hand, minimum and maximum torque has been increased with organoclay loading as well. The observed trend was related mainly to the strong interaction between the rubber matrix and the nanoscaled filler (organoclay in this case) and subsequently to the improved cross-link density. Such improvement was attributed to the small size of the filler particles and to the amine functionality in the organoclay structure. Thermal analysis obtained from differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA) revealed that, the enthalpy of vulcanization increased with organoclay content indicating increased cross-link density formation, whereas TGA analysis showed that organoclay has increased the thermal stability of the EPDM hybrids.