公开(公告)号：US5244613A

公开(公告)日：1993-09-14

申请号：US6560

申请日：1993-01-21

申请人： Michael F. Hurley ,  Terry D. Seagraves

发明人： Michael F. Hurley ,  Terry D. Seagraves

IPC分类号： B29C45/00 ,  B29K75/00 ,  C08G18/00 ,  C08G18/06 ,  C08G18/08 ,  C08G101/00 ,  C08J9/30 ,  C08J9/32

CPC分类号： C08J9/32 ,  C08J9/30 ,  C08J2375/04

摘要： It has been found that the use of specific expanded organic microspheres greatly improve the RIM process by (i) significantly enhancing the blowing action of air and/or nitrogen, (ii) providing for uniform density of the molded part, (iii) allowing for the reduction of internal mold pressures, (iv) substantially eliminating surface defects, (v) allowing for a significant reduction in density in the molded product, (vi) allowing for a substantial increase in the amount of air and/or nitrogen that can be dissolved in the isocyanate-reactive component, and (vii) significantly reducing shrinkage in the molded part.

摘要翻译： 已经发现，通过使用（i）显着增强空气和/或氮的吹动作用，（ii）提供模制部件的均匀密度，（iii）允许使用特定的扩展的有机微球体大大改善RIM工艺 内部模具压力的降低，（iv）基本上消除表面缺陷，（v）允许模制产品中的密度显着降低，（vi）允许空气和/或氮的量显着增加， 溶解在异氰酸酯反应性组分中，和（vii）显着减少模塑部件的收缩。