COMPATIBILIZED POLYOLEFIN BLEND

To provide a polyolefin composition for rotational molding that does not cause defective mechanical properties such as impact resistance and the like.SOLUTION: A composition comprises four components of a) one or more polyethylenes, b) one or more polypropylenes, c) one or more polyolefin elastomers...

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Main Authors RUSSELL P BARRY, L WALTON KIM, GARY R MARCHAND, RAYMOND L LAAKSO JR, HU YUSHAN, COLIN LIPISHAN
Format Patent
LanguageEnglish
Japanese
Published 18.07.2019
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Summary:To provide a polyolefin composition for rotational molding that does not cause defective mechanical properties such as impact resistance and the like.SOLUTION: A composition comprises four components of a) one or more polyethylenes, b) one or more polypropylenes, c) one or more polyolefin elastomers containing an olefin block copolymer as an essential component and d) a crystalline block composite including three constituent components [i) a crystalline ethylene-based polymer, ii) a crystalline propylene-based polymer and iii) a block copolymer having a crystalline ethylene-based block and a crystalline propylene block]. In the block composite, the composition of the constituent component (i) is the same as the crystalline ethylene-based block of the block copolymer (iii) and the composition of the constituent component (ii) is the same as the crystalline propylene block of the block copolymer (iii).SELECTED DRAWING: Figure 1 【課題】耐衝撃性などの力学的不良を起こさない回転成形用ポリオレフィン組成物の提供。【解決手段】a)1つ以上のポリエチレンと、b)1つ以上のポリプロピレンと、c)オレフィンブロックコポリマーを必須成分として含有する1つ以上のポリオレフィンエラストマーと、d)3つの構成成分[i)結晶性エチレン系ポリマー、ii)結晶性プロピレン系ポリマー、ならびに、iii)結晶性エチレン系ブロック及び結晶性プロピレンブロックを有するブロックコポリマー]を含む結晶性ブロック複合体、の4成分からなる組成物。ただし、ブロック複合体中、構成成分(i)の組成は、ブロックコポリマー(iii)の結晶性エチレン系ブロックと同一であり、構成成分(ii)の組成は、前記ブロックコポリマー(iii)の結晶性プロピレンブロックと同一である。【選択図】図1
Bibliography:Application Number: JP20190060617