申请人:Asahi Kasei Chemicals Corporation
公开号:EP1676886A1
公开(公告)日:2006-07-05
The invention relates to: a process for producing a poly(phenylene ether) resin composition which comprises (A) a poly(phenylene ether) and (B) a styrene resin and in which the styrene resin (B) is a styrene resin comprising a rubber-modified polystyrene containing a polybutadiene having 90% or higher cis-1,4 bonds, the process comprising a first step in which the poly(phenylene ether) (A) is melt-kneaded together with (B1) part or all of the styrene resin which does not include any rubber-modified polystyrene containing an unhydrogenated polybutadiene and a subsequent second step in which the remaining styrene resin including (B2) a rubber-modified polystyrene containing a polybutadiene having 90% or higher cis-1,4 bonds is melt-kneaded; and a poly(phenylene ether) resin composition obtained by the process. According to the invention, a modified PPE can be stably supplied which is free from various appearance failures such as black foreign particles, unmelted matter, and color unevenness and is excellent in practical properties such as stability to high-temperature residence, heat exposure resistance, and low-temperature impact resistance, in particular, heat deterioration resistance.
本发明涉及一种生产聚亚苯基醚树脂组合物的工艺,它包括(A)聚亚苯基醚和(B)苯乙烯树脂,其中苯乙烯树脂(B)是由橡胶改性聚苯乙烯组成的苯乙烯树脂,含有顺式-1,4键含量为90%或更高的聚丁二烯、该工艺包括:第一步,将聚苯醚(A)与(B1)部分或全部苯乙烯树脂熔融捏合,其中不包括任何含有未氢化聚丁二烯的橡胶改性聚苯乙烯;第二步,将剩余的苯乙烯树脂熔融捏合,其中包括(B2)含有顺式-1,4 键含量为 90% 或更高的聚丁二烯的橡胶改性聚苯乙烯;以及通过该工艺获得的聚苯醚树脂组合物。根据本发明,可以稳定地提供一种改性聚苯乙烯,这种聚苯乙烯没有各种外观故障,如黑色异物颗粒、未熔化物和颜色不均匀,并且具有优异的实用性能,如对高温停留的稳定性、耐热暴露性和耐低温冲击性,特别是耐热劣化性。