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1. 发明公开

EP2682422A1 Thermosetting resin compositions comprising homogeneously distributed long reinforcing fibers 审中-公开
标题翻译： WärmehärtendeHarzzusammensetzungen mitgleichmäßigverteilten langenVerstärkungsfasern
公开(公告)号：EP2682422A1
公开(公告)日：2014-01-08
申请号：EP12174730.7
申请日：2012-07-03
申请人： DSM IP Assets B.V.
发明人： Geesink, Johannes Hendrik , Sun, Chuxia , Van Dijk, Michael Alphonsus Cornelis Johannes , Boonen, Petrus Johannes Lambertus , Jansen, Johan Franz Gradus Antonius
IPC分类号： C08K7/14 , C08J3/22 , C08J5/04 , B29B9/14 , B29B7/48
CPC分类号： C08K5/14 , B29B7/46 , B29B7/90 , B29C47/6056 , B29C47/662 , C08J3/201 , C08J3/24 , C08J2367/06 , C08K7/14 , C08K2201/004 , C08L67/06
摘要： The present invention relates to a process for preparing a solid, reinforced, thermal radically curable thermosetting resin composition comprising (A) polyester resin with reactive carbon unsaturations, (B) fibers and (C) a radical initiator, wherein the process comprises mixing
(1) Adding the polyester resin (A), and optionally other compounds, into a kneading device having two opposed non-intermeshing screws,
(2) Liquefying at least the polyester resin in the kneading device to obtain a first composition containing liquefied polyester resin,
(3) Adding radical initiator (C) into the kneading device to the first composition containing liquefied polyester resin to obtain a second composition containing liquefied polyester resin and radical initiator,
(4) Adding and dispersing, to the second composition in the kneading device, fibers having an initial weight average length L w of from 2 to 50 mm to obtain the solid, reinforced, thermal radically curable thermosetting resin composition,
wherein
- the gap between the two opposed non-intermeshing screws is ≥ 1 mm,
- the kneading device has a barrel temperature T p from 80 to 130 °C,
- the dispersing is effected at a pressure lower than 2 bar,
- the dispersing is effected at a shear rate in the range from 1 to 5000 sec -1 ,
- the viscosity of the composition prior to adding the fibers is in the range from 3 to 3000 Pa.s (at T p ),
- the weight average length L w of the fibers present in the solid, reinforced, thermal radically curable thermosetting resin composition is higher than 1 mm.
摘要翻译：本发明涉及一种制备固体，增强，热可自由基固化的热固性树脂组合物的方法，其包含（A）具有反应性碳不饱和度的聚酯树脂，（B）纤维和（C）自由基引发剂，其中该方法包括混合）将聚酯树脂（A）和任选的其它化合物加入到具有两个相对的非啮合螺钉的捏合装置中，（2）在捏合装置中至少液化聚酯树脂，以获得含有液化聚酯树脂的第一组合物（ 3）向含有液化聚酯树脂的第一组合物中添加自由基引发剂（C），得到含有液化聚酯树脂和自由基引发剂的第二组合物，（4）在捏合装置中向第二组合物中添加和分散纤维初始重量平均长度L w为2-50mm，得到固体强化热固化型热固性树脂组合物，其中 - 两个相对的非啮合螺钉之间的间隙为¥1毫米， - 捏合装置的机筒温度T p为80至130℃， - 分散在低于2巴的压力下进行， - 在1至5000秒-1的剪切速率下进行分散， - 添加纤维之前组合物的粘度在3至3000Pa·s（T p）的范围内， - 重均分子量存在于固体，增强的，热可自由基固化的热固性树脂组合物中的纤维的长度L w高于1mm。

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