Polyol cure

Two-component, polyol-cured 25.4 6 Isophthalic polyester (vinyl toluene ... 

In many adhesives formulations, the resin portion is the same or similar and what determines its properties is the hardener or catalyst that is used to cure the resin. Thus, depending on the hardener, epoxy adhesives may be referred to as amine-cured, anhydride-cured, polyamide-cured, or novolac-cured. Polyurethanes may be polyol-cured or hydroxypolyester-cured. 

Polyols can be used in place of diamines for curing Adiprene, especially where softer products are required. Mixtures of 1,4-butane diol and trimethylolpropane, for example, give products around a hardness of 60 IRHD. The general physical properties from polyol cures are low compared with MOCA cure, but in certain cases where soft products are required they can be found to be adequate. 

More recently, systems have been reported which thermally generate isocyanates without the evolution of side products. When these thermal reactions are carried out in the presence of polyols, cured polyurethanes are said to be produced. One such system is based on bis(cyclic ureas). 

Two-component, polyol-cured Two-part solventless, polybutylene-based Silicones... 

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