Unbound rubber

Unbound rubber Carbon black aggregate Bound rubber... 

The unusual and attractive properties of the block polymers already identified, and the almost limitless combinations of possible block polymer structures, argue for an unbounded future. The rapidly growing applications for the commercial thermoplastic rubber block polymers of Table III have confirmed the trend. To lend some credibility to our look at the future, however, we have restricted it to the area of A-B-A block polymers in which we have the most experience. Some of the future trends we suggest are higher service temperature, oxidative stability, better processability, solvent resistance, flame retardance, electrical conductivity. 

The efficacy of polyurethane and styrene butadiene rubber (SBR) as binders for ground rubber prepared from waste tires was compared to a formulation of a compound developed without binder. Without binder, the effect of both sulfur and accelerator content on tensile properties are studied, as well as the effect of ageing on these properties [29]. The suggested uses of the unbound product include rubber blocks, and ballast mats for railway applications. 

Good Practice for Unbound Applications of Tyre-derived Rubber Materials in Sensitive Environments - UK WRAP Quality Protocol... 

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