专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

2. 发明申请

WO1996011962A1 NON-LINEAR STYRENIC POLYMER COMPOSITIONS AND ARTICLES PREPARED THEREFROM 审中-公开
标题翻译：非线性STYRENIC聚合物组合物及其制备方法
公开(公告)号：WO1996011962A1
公开(公告)日：1996-04-25
申请号：PCT/US1995014112
申请日：1995-10-11
申请人： THE DOW CHEMICAL COMPANY , DEMIRÖRS, Mehmet , SLEECKX, Jozef, Julius , VOLLENBERG, Peter, Hendrikus , VO, Chau, V. , WELSH, Gary, C.
发明人： THE DOW CHEMICAL COMPANY
IPC分类号： C08F12/02
CPC分类号： C08F12/04 , C08F2/02
摘要： Monovinyl aromatic polymer compositions with high melt strength, good flow and good heat properties which are suitable for fast injection molding, blow molding and thermoforming applications, comprising non-linear monovinyl aromatic polymers and copolymers having comb-type structures with 3 branches, star type structures with 4 to 6 branches, and/or dendritic structures in which the branches themselves have attached branched units. These compositions possess inherent melt strength and can be blow molded or thermoformed without sagging or molded into articles in shorter cycle times using less material than linear monovinyl aromatic polymers and copolymers with the same flow and heat distortion temperatures. Also dislosed is a process for making high molecular weight branched monovinyl aromatic polymers, for example, Mw between 75,000 and 500,000, at high rates, comprising polymerizing pure styrene monomer or styrene monomer and polymerizable comonomer via a continuous free radial polymerization process using a peroxide initiator, for example, n-butyl tert-butyl peroxy fumarate, selected from a new class of vinyl peroxide initiators that contain both a copolymerizable double bond and an organic peroxide moiety.
摘要翻译：包含非线形单乙烯基芳族聚合物和共聚物的具有高熔体强度，良好流动性和良好热性能的单乙烯基芳族聚合物组合物，其包含具有3个分枝的梳型结构的非线形单乙烯基芳族聚合物和共聚物，星型结构具有4至6个分支，和/或树枝状结构，其中分支本身具有分支单元。这些组合物具有固有的熔体强度，并且可以吹制成型或热成型，而不会在较短的循环时间内下垂或模制成制品，使用比线性单乙烯基芳族聚合物和具有相同流动和热变形温度的共聚物更少的材料。还包封的方法是以高速率制备高分子量支化单乙烯基芳族聚合物，例如Mw在75,000和500,000之间的方法，包括通过使用过氧化物引发剂的连续自由径向聚合方法聚合纯苯乙烯单体或苯乙烯单体和可聚合共聚单体，例如过氧富马酸叔丁酯，选自含有可共聚双键和有机过氧化物部分的新一类乙烯基过氧化物引发剂。

IPRDB

热门服务

关于我们

友情链接

联系方式