| 摘要 |
Polyurethane products are produced by utilizing a urea and/or urea condensate and/or their salts of mineral acid or organic acids as the urethane catalyst and reacting an organic compounds with 1 or more active hydrogens with a polyisocyanates. The urea condensates which act as the urethane catalyst are produced by heating urea with itself or amino compounds or other active organic compounds or reacted with a mineral acid to form a salt. These urethane product may be produced in the form of solids, rigid foams, flexible foams, elastomers, adhesives and water based coating agents.
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