| 摘要 |
PCT No. PCT/EP88/01005 Sec. 371 Date May 3, 1990 Sec. 102(e) Date May 3, 1990 PCT Filed Nov. 4, 1988 PCT Pub. No. WO89/04342 PCT Pub. Date May 18, 1989.Rigid foam is produced without using fluorocarbons as a foaming agent by mixing an oligomer mixture of monomer and dimers to heximers, flame retardant, nitrogen liberating catalysts, cell regulating agents, foam stabilizer and foam regulator, crosslinking agents and wetting agent, preheating the mixture, and pouring the mixture into a mold, keeping the temperature at a value from 50 DEG to 70 DEG C. and upon completed polymerization removing the product from the mold.
|
