Patent ID: 7390867

Claim:
An isocyanate adduct comprising the reaction product of at least one polyisocyanate, having a functionality >2, with compounds having at least two hydrogen atoms which are reactive toward isocyanate groups, the reaction product providing a polymer matrix that is essentially compact, wherein said adduct has a crystalline content of less than 10 j/g determined by differential scanning calorimetry in accordance with DIN 51 004 at 20 K/min from room temperature to 250° C. using a nitrogen flow of 3 l/h as carrier gas and an aromatics content reported as carbon atoms in aromatic rings of less than 31% by weight, based on the total weight of the isocyanate adduct, and wherein the compounds having reactive hydrogen atoms comprise at least one polyetherol bi) having a functionality greater than 3 and a molar mass 300 g/mol or greater.