prov:value
| - The compositions disclosed in U.S. Pat. No. 4,101,529, U.S. Pat. No. 4,393,186, U.S. Pat. No. 4,808,690 and U.S. Pat. No. 4,822,827 all contain a polyol for example polyester, polycarbonate or polyether as part of the polyurethane structure.
|