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IsoQure^® TT is a solid polyfunctional isocyanate which is absolutely stable under normal storage conditions. It is produced by dimerisation of 2,4´ toluylene di-isocyanate.

IsoQure^® TT is very versatile and has applications in many industries. It is used as an adhesion promoter for rubber to fabric bonding, for PVC to fabric bonding, as a vulcanising agent for natural and synthetic rubber and as a crosslinker for heat-activated polyurethane systems.

Chemical name: 1.3 bis(3-isocyanato-4-methylphenyl)-1.3-diazetidin-2.4-dione
CAS No.: 26747-90-0
EINECS No.: 247-953-0

IsoQure^® TT has the ability to react under different molecular weights: Under mild reaction conditions, i.e. when reacted with aliphatic hydroxyl groups at temperatures < 140°C in the absence of basic catalysts or with primary or secondary amino groups at room temperature, it is primarily bi-functional and has a molecular weight of 348.
Under severe conditions, either reacted at temperatures > 150°C or at lower temperatures with the aid of highly basic catalysts, it still reacts bi-functional but with a molecular weight of 174 (that of monomeric TDI).

Main applications for IsoQure^® TT are:

Adhesion promoter for rubber to fabric bonding, especially for polyester cord or reinforcing fabric for i.e. conveyor belts

Adhesion promoter for PVC to fabric bonding, i.e. for the production of light-weight conveyor belts for the food industry or for plastisol-coated fabric

Vulcanising agent for natural and synthetic rubber, especially for polyurethane rubber like Urepan 600

Crosslinker for heat-activated polyurethane coatings, sealants, adhesives, and elastomers

For further information please call our technical service or order specific technical guidelines for the various applications.