| 摘要 |
THIS INVENTION IS DIRECTED TO AN IMPROVEMENT IN A CROSSLINKABLE VINYL ACETATE/VINYL VERSATATE BASED POLYMERIC BINDER FOR USE IN NONWOVEN APPLICATIONS. THE IMPROVEMENT IN THE BINDER FOR NONWOVEN AND, PARTICULARLY PREMOISTENED WIPES, RESIDES IN A POLYMER COMPRISED OF VINYL ACETATE AND VINYL VERSATATE PRODUCED BY EITHER OF THE METHODS: BATCH POLYMERIZATION WHERE POLYMERIZED UNITS OF AN IN SITU OR INTERNAL CROSSLINKING (POLYOLEFINICALLY UNSATURATED) MONOMER ARE INCORPORATED INTO THE POLYMER; OR, DELAYED ADDITION OF VINYL VERSATATE WHERE THE VINYL VERSATATE IS POLYMERIZED INTO THE POLYMER BY DELAYED ADDITION SUCH THAT VINYL VERSATATE RICH POLYMER SEGMENTS ARE FORMED; AND, PREFERABLY, POLYMERIZED UNITS OF A POLYOLEFINICALLY UNSATURATED MONOMER ARE INCORPORATED INTO THE POLYMER. |
