| abstract |
Polyester-epoxide polymer compositions modified by isocyanate (i-peep) are disclosed. the i-peep compositions comprise a reaction product of a polyepoxide compound, a polyisocyanate and a polyester polyol composition. the ratio of epoxy equivalents to hydroxyl equivalents is within the range of 0.2 to 2. the i-peep index, as defined in this document, is within the range of 100 to 200. the i-peep composition has one tg within the range of -30ºC to 35ºC. high and low temperature processes catalyzed by bases or lewis acids to make i-peep compositions are also disclosed. in a simple yet innovative approach, a new class of polymers useful for coatings, elastomers, adhesives, sealants and other valuable products is assembled from readily available raw materials without depending on the polyamines normally used for curing epoxy systems. |