申请人:BICC Public Limited Company
公开号:EP0118164A1
公开(公告)日:1984-09-12
Polymer compositions used in the manufacture of heat-shrink products for high-voltage electrical applications and which can be white or coloured comprise
(i) a polymeric base comprising at least one polymer having a main chain comprising carbon atoms and optionally oxygen and/or nitrogen atoms but no other hetero-atoms crosslinked to a condition in which it is dimensionally heat-recoverable and has a recovery temperature not less than 80°C and, per hundred parts of the base (by weight);
(ii) 40 to 120 parts of mineral filler of which (a) at least half, subject to a minimum of 30 parts, is calcium carbonate with a number average particle size in the range 0.01 to 50 micro metre and containing substantially no particles with a dimension in excess of 100 micrometre; (b) up to 20 parts may be an inert mineral filler, and; (c) the balance, if any, is an active flame-retardant filler.
They may include also one or more pigment; one or more antioxidant and/or ultra-violet stabiliser; one or more acid acceptor; and one or more processing aid.
用于制造高压电气应用热缩产品的聚合物成分,可以是白色或彩色的,包括
(i) 聚合物基料,包括至少一种聚合物,其主链由碳原子和可选的氧原子 和/或氮原子组成,但不含其他杂原子,交联后可进行尺寸热复原,且 复原温度不低于 80°C,每百份基料(按重量计)含以下成分
(ii) 40 至 120 份矿物填料,其中(a)至少一半(最少 30 份)为碳酸钙,其平均粒径在 0.01 至 50 微米之间,且基本上不含尺寸超过 100 微米的颗粒;(b)最多 20 份可为惰性矿物填料,及;(c)其余(如有)为活性阻燃填料。
它们还可包括一种或多种颜料;一种或多种抗氧化剂和/或紫外线稳定剂;一种或多种酸接受剂;以及一种或多种加工助剂。