公开(公告)号：US6066280A

公开(公告)日：2000-05-23

申请号：US10117

申请日：1998-01-21

申请人： Luigi Abbondanza ,  Gianluigi Marra ,  Giorgio Giannotta ,  Antonio Gennaro

发明人： Luigi Abbondanza ,  Gianluigi Marra ,  Giorgio Giannotta ,  Antonio Gennaro

IPC分类号： B29C43/00 ,  B29C67/04

CPC分类号： B29C43/006 ,  B29C43/003 ,  B29K2025/00 ,  B29K2105/251

摘要： Process for the preparation of manufactured products based on vinylaromatic polymers with a predominantly syndiotactic structure which comprises:a) compressing the polymer in powder form in a mould at a pressure ranging from 0.1 to 500 MPa;b) sintering, under pressure, the compact powder at a temperature ranging from the glass transition temperature (Tg) of the polymer to the melting temperature (Tm);c) cooling the manufactured product to room temperature.

摘要翻译： 用于制备基于主要间同立构结构的乙烯基芳族聚合物的制造产品的方法，该方法包括：a）在0.1至500MPa的压力下，将模具中的粉末形式的聚合物压缩; b）在压力下，在从聚合物的玻璃化转变温度（Tg）到熔融温度（Tm）的温度范围内烧结致密粉末; c）将制成品冷却至室温。

公开(公告)号：US06174973B1

公开(公告)日：2001-01-16

申请号：US09415912

申请日：1999-10-12

申请人： Riccardo Po' ,  Luigi Abbondanza

发明人： Riccardo Po' ,  Luigi Abbondanza

IPC分类号： C08F1204

CPC分类号： B01J31/26 ,  B01J31/143 ,  B01J31/2295 ,  B01J2531/46 ,  C08F4/65912 ,  C08F12/08 ,  C08F4/6592

摘要： Process for the preparation of crystalline vinylaromatic polymers with a high degree of syndiotaxy which comprises polymerizing vinylaromatic monomers in the presence of a catalytic system essentially consisting of: a) a complex of titanium having the general formula: CpTiX1X2X3  (I) wherein Cp represents a cyclopentadienyl ligand whereas X1, X2, X3, the same or different, are selected from a halogen such as chlorine, or from alkyl groups, alkoxides, carboxylates, di(alkyl)amides; b) a polyalkylaluminoxane wherein the alkyl group contains from 1 to 8 carbon atoms; c) aluminum trifluoride.

摘要翻译： 用于制备具有高度间同立构的结晶乙烯基芳族聚合物的方法，其包括在催化体系存在下聚合乙烯基芳族单体，所述催化体系基本上由以下组成：a）具有以下通式的钛络合物：其中Cp表示环戊二烯基配体，而X1， X2，X3相同或不同，选自卤素如氯或烷基，醇盐，羧酸盐，二（烷基）酰胺; b）其中烷基含有1至8个碳原子的聚烷基铝氧烷; c ）三氟化铝。