摘要:
Tough, moldable copolymers can be made from a reaction system which comprises polymer precursor compounds which form a polymer containing urea and amide linkages and an unsaturated monomer which forms an addition polymer, together with an interpolymer crosslinker which crosslinks the polymer to the addition polymer.
摘要:
Improved fiber reinforced structural products are made in a mold cavity containing reinforcing fibers by reaction injection of impingement mixed isocyanante reactive ingredients comprising a soft-block component, a chain extender selected from primary aromatic polyamines having at least one electron withdrawing group attached directly to the ring, secondary diamines, an isocyanurate formation catalyst and a polyisocyanate.