| abstract |
(a) residues of at least one polyhydroxylated aromatic compound containing an oligomeric network and residues of at least one polyol having at least three hydroxyl groups; And (b) a peripheral group oligomeric polyol composition having a plurality having one or more pendant hydroxyl groups, bonded to the oligomeric network by a plurality of linking units. The moiety of the polyol may optionally contain one or more oxygen ether groups, one or more amino ether groups, or both one or more oxygen ether groups and one or more amino ether groups. The reaction of the oligomeric polyols with isocyanate monomers provides a new class of polyurethanes with good heat and water resistance. The novel polyurethanes exhibit lower peak exotherms, typically less than 250 ° F., during in-mold polymerization. Articles made from oligomeric polyol composition polyurethanes comprising such exhibit flexural strength and modulus, and significant ginger, of at least 10,000 psi and 400,000 psi, respectively. |