| 摘要 |
PCT No. PCT/EP95/04949 Sec. 371 Date Jun. 23, 1997 Sec. 102(e) Date Jun. 23, 1997 PCT Filed Dec. 14, 1995 PCT Pub. No. WO96/20252 PCT Pub. Date Jul. 4, 1996The invention relates to the use of moisture-curing PU hotmelt adhesives as molding compounds for the production of moldings, the PU hotmelt adhesives having a melt viscosity of less than 100 Paxs at the processing temperature of 70 DEG to 190 DEG C. To produce the moldings, the molding compound is melted at temperatures of 70 DEG to 200 DEG C., the melt is injected into closed molds under an excess pressure of 1 to 50 bar, the cooled moldings are removed from the mold after a short time and are then cured with atmospheric moisture. Economic and technical advantages include distinctly lower processing pressures, expense on machinery and tooling and firm adhesion to various substrates. The moldings are heat-resistant and adhere to various substrates. They are particularly suitable for the production of electrical components. |
