Vulcanization activator

The ZnCFO action as vulcanization active component of elastomeric compositions on the basis of rubbers of general and special assignment with various vulcanization systems is investigated. 

Composite as Vulcanization Active Component for Rubbers of General and Special Assignment... 

Key words Polymer-inorganic composite Vulcanization active component Elastomeric composition Vulcanization Morphological structure Physical-mechanical properties. 

Despite of 150-year s history of vulcanization process, it is impossible to consider that fundamental and applied researches in direction of vulcanization systems perfection are completed. For today one of the ways of rubbers properties improvement is the synthesis and application of the new chemicals-additives, including, vulcanization active, that is connected, first of all, with reduction of global stocks of zinc ores as basic raw material for reception of traditional activator - zinc oxide. Besides, modem increase of industrial potential and the accumulation of big quantity wastes derivate the problems of ecological character, which require the emergency decision. Therefore creation of resourcesaving technologies of the new compounds reception from products of secondary raw material processing has paramount importance. 

Figure 4. Rheological properties of the modeling unfilled rubber mixes on the basis of isoprene rubber with a various type and contents of sulfur vulcanization activators...

An estimation of ZnCFO efficiency as vulcanization active component was carried out in modelling unfilled elastomeric compositions on the basis of isoprene, butadiene-nitrile, chloroprene and butyl rubbers of sulphur, thiuram, peroxide, metaloxide and resin vulcanization systems. 

Thus, from the analysis of results of experimental researches on estimation of ZnCFO vulcanization activity in comparison with zinc oxide in structure of various vulcanization systems (VS) follows, that its efficiency decreases in line (fig. 10) ... 

ZnCFO is the effective vulcanization active component of the sulfur, thiuram, peroxide and metaloxide vulcanization systems for isoprene, nitrile-butadiene and chloroprene rubbers at the same time it is not effective in resin vulcanization system for butyl rubber. On a degree of positive influence on the properties of elastomeric compositions vulcanization systems with ZnCFO are arranged in a line ... 

Like their competitors in Europe and in America, the Japanese producers have focused their attention on accelerators (vulcanization activators and agents) and on antiaging agents (antiozonants, stabilizers). Their automobile exports provide a market for tires that their counterparts in other countries cannot claim to the same extent. 

Based on an analysis of references, it was found that organic vulcanization accelerators are especially active in the presence of several oxides and hydroxides of metals (vulcanization activators) like zinc, lead, magnesium, calcium, cadmium, bismuth, and their combinations. 

Zinc oxide was accepted as an RM vulcanization activator, and its optimal content in the RubCon composition was estimated at 10-20 mass parts per 100 mass parts of rubber. 

The results of the experiment showed that sulfur and vulcanization activators had the most influence on the change of durability, while that of the accelerator system is less important. The increase of sulfur content increases durability against compression, but decreases durability against bending. The interactions of the sulfur accelerator and sulfur activator have similar influence. 

Rhenomag. [Rhein Chemie] Magnesium oxide acid acceptor and vulcanization activator for rubber goods, tech, molded and extruded articles, adhesives based on CR, erasers, chlorinated paraffins. 

Struktol Activator 73. [Struktol] Mixture of zinc salts of aliphatic a aromatic carboxylic acids vulcanization activator for natural rubber. 

Thanecure . [T E] Zinc chloride/ benzothiazyl disulfide vulcanization activator for sulfiir-curable millable urethane elastomers. 

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