公开(公告)号：US20060281866A1

公开(公告)日：2006-12-14

申请号：US10566937

申请日：2004-09-03

申请人： Thomas Oswald ,  James Cooper ,  Jeffrey Weinhold ,  David Gilluspie

发明人： Thomas Oswald ,  James Cooper ,  Jeffrey Weinhold ,  David Gilluspie

IPC分类号： C08L23/04

CPC分类号： C09D123/08 ,  C08J5/18 ,  C08J2300/00 ,  C08J2323/06 ,  C08L23/06 ,  C08L23/08 ,  C08L23/0815 ,  C09D123/06 ,  C08L2666/06

摘要： A composition is disclosed which is particularly suited for use in extrusion coating. The composition comprises a polymeric material having a rheology such that the slope S of a natural log-natural log plot of loss modulus (or G″) versus storage modulus (or G′) is greater than [0.635*(melt index)+13.2]/[(melt index)+16.6], and wherein the polymeric material has a CDF RI fraction less than 0.23 of a GPC chromatogram which has a molecular weight above 85,000 g/mol, and a CDF LS fraction of more than 0.07 at a conventional GPC molecular weight of 1,750,000 g/mol or greater. The compositions exhibit reduced neck-in when used in extrusion coating and the neck-in is independent of melt strength, thereby facilitating improved extrusion processes.

摘要翻译： 公开了一种特别适用于挤出涂层的组合物。 该组合物包含具有流变性的聚合材料，使得损耗模量（或G“）对储能模量（或G'）的自然对数 - 自然对数图的斜率S大于[0.635 *（熔体指数）+ 13.2] / [（熔体指数）+16.6]，其中聚合物材料的CDF RI分数小于0.23的GPC色谱图，其分子量高于85,000g / mol，CDF LS分数大于0.07 常规GPC分子量为1750,000g / mol以上。 当用于挤出涂布时，组合物显示减少的颈缩，并且颈缩不依赖于熔体强度，从而有助于改进挤出工艺。