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1. 发明申请

WO1997031975A1 LOW-DENSITY POLYMERIC COMPOSITION 审中-公开
标题翻译：低密度聚合物组合物
公开(公告)号：WO1997031975A1
公开(公告)日：1997-09-04
申请号：PCT/GB1997000463
申请日：1997-02-20
申请人： RAYCHEM LIMITED , WHITELEY, Richard, Harold , SAWYER, Mark , KIRKHAM, Stanley
发明人： RAYCHEM LIMITED
IPC分类号： C08K07/22
CPC分类号： C08K7/16 , C08L9/00 , C08L23/0815 , C08L2205/02 , C08L2205/18 , C08L23/02 , C08L2666/02
摘要： A low-density polymer composition and use thereof in undersea flotation cables and the like, the composition comprising by volume based on the whole composition, (a) at least 30 % of a polymer component consisting of (i) thermoplastic polyolefin elastomer of room temperature density less than 0.9 g/cc and/or (ii) thermoplastic olefin/(ester or acid) copolymer elastomer, and (b) at least 30 % of micro-balls of room temperature density less than 0.6 g/cc, at least 80 %, preferably at least 90 %, more preferably at least 95 %, by weight, of the micro-balls having a maximum dimension less than 300 mu m, preferably less than 200 mu m. Preferred elastomers are metallocene-catalysed olefin copolymers of density 0.86-0.88 g/cc, and micro-balls of diameters 10-45, preferably 10-34, micrometers are advantageous in resisting pressures up to 50 MPa (5 km under sea).
摘要翻译：一种低密度聚合物组合物及其在海底浮选电缆等中的用途，所述组合物基于整个组合物以体积计，（a）至少30％的聚合物组分由（i）室温的热塑性聚烯烃弹性体密度小于0.9g / cc和/或（ii）热塑性烯烃/（酯或酸）共聚物弹性体，和（b）至少30％的室温密度小于0.6g / cc的微球，至少80 微球的最大尺寸小于300μm，优选小于200μm，优选至少90％，更优选至少95％重量的微球。优选的弹性体是密度为0.86-0.88g / cc的茂金属催化的烯烃共聚物，直径为10-45，优选10-34微米的微球有利于抵抗高达50MPa（海下5公里）的压力。

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