公开(公告)号：US4678834A

公开(公告)日：1987-07-07

申请号：US756223

申请日：1985-07-18

申请人： Daniel W. Boivin ,  Ronald A. Zelonka

发明人： Daniel W. Boivin ,  Ronald A. Zelonka

IPC分类号： C08J3/22 ,  C08K5/00 ,  C08K5/14 ,  C08L23/00 ,  C08L23/02 ,  C08L23/08 ,  C08L23/16 ,  C08L23/26 ,  C08L25/00 ,  C08L53/00 ,  C08L57/00 ,  C08J3/24 ,  C08J5/00

CPC分类号： C08J3/226 ,  C08J2323/02

摘要： A polyolefin blend comprising, in physical admixture, a major portion of particles of a polyethylene and a minor portion of particles of a composition of a thermoplastic second polymer, is disclosed. The polyethylene is selected from the group consisting of homopolymers of ethylene and copolymers of ethylene and at least one C.sub.4 -C.sub.10 higher alpha-olefin, and the second polymer is a normally solid thermoplastic polymer having a melting point of less than 185.degree. C. and a shear viscosity that is not more than that of the polyethylene when measured at 200.degree. C. and a shear rate of 400 sec.sup.-1 with the proviso that the second polymer is not a homopolymer or copolymer derived solely from hydrocarbon alpha-olefins having 2-10 carbon atoms. Examples of second polymers are (a) homopolymers and copolymers of unsaturated hydrocarbons in which at least one monomer is other than a C.sub.2 -C.sub.10 alpha-olefin, e.g. ethylene/propylene elastomers, polystyrene and styrene/butadiene/styrene copolymers, (b) copolymers of ethylene with ethylenically unsaturated carboxylic acids and anhydrides, and esters thereof, and (c) modified polymers e.g. chlorinated polyethylene, grafted and ionomeric polymers. The composition of the second polymer contains a reactive agent that is capable of reacting with polyolefins that are in a molten state, such agents being cross-linking agents and/or modifying agents. In an alternative embodiment, the polyethylene may be more broadly defined as being a homopolymer or copolymer of hydrocarbon alpha-olefins having 2-10 carbon atoms. The blends may be used in a wide variety of processes, including blow-moulding processes, film and pipe extrusion processes, sheet thermoforming processes and rotational moulding processes.

摘要翻译： 公开了一种聚烯烃共混物，其以物理混合物形式包含主要部分的聚乙烯颗粒和少部分热塑性第二聚合物组合物颗粒的颗粒。 聚乙烯选自乙烯均聚物和乙烯与至少一种C 4 -C 10高级α-烯烃的共聚物，第二聚合物是熔点小于185℃的通常为固体的热塑性聚合物， 在200℃下测量的剪切粘度不大于聚乙烯的剪切粘度，剪切速率为400秒-1，条件是第二聚合物不是仅由具有2个碳原子的α-烯烃的均聚物或共聚物 -10个碳原子。 第二聚合物的实例是（a）不饱和烃的均聚物和共聚物，其中至少一种单体不是C 2 -C 10α-烯烃，例如， 乙烯/丙烯弹性体，聚苯乙烯和苯乙烯/丁二烯/苯乙烯共聚物，（b）乙烯与烯属不饱和羧酸和酸酐的共聚物及其酯，和（c） 氯化聚乙烯，接枝和离聚物聚合物。 第二聚合物的组成包含能够与处于熔融状态的聚烯烃反应的反应剂，这些试剂是交联剂和/或改性剂。 在替代实施方案中，聚乙烯可以更广泛地定义为具有2-10个碳原子的烃α-烯烃的均聚物或共聚物。 共混物可以用于各种各样的方法，包括吹塑工艺，薄膜和管材挤出方法，片材热成型方法和旋转模塑方法。