公开(公告)号：US10570270B2

公开(公告)日：2020-02-25

申请号：US15815437

申请日：2017-11-16

申请人： Equistar Chemicals, LP

发明人： Steven W. Horwatt ,  Kelly A. Enderle

IPC分类号： C08K5/3492 ,  C08K5/524 ,  C08L23/08 ,  B29C41/00 ,  C08K5/526 ,  C08K5/13 ,  C08K3/26 ,  C08K5/098

摘要： Provided herein are polyolefin-based compositions useful for making rotomolded parts having useful properties, including those related to impact resistance and color. In one aspect, there are provided compositions comprising (a) a rotational molded polyolefin, comprising a resin, wherein the resin is polyethylene or a copolymer thereof, having a melt index (MI) ranging from about 1 g/10 minutes to about 10 g/10 minutes; and (b) an additive package comprising: (i) an antioxidant; (ii) a processing stabilizer; (iii) optionally a UV light stabilizer; (iv) optionally a fatty acid-based acid scavenger comprising a metal salt of a fatty acid; and (v) a dihydrotalcite-based acid scavenger present in the composition at between about 800 ppm to about 3,000 ppm. In some embodiments, the ARM Impact Percent Ductility is greater than or equal to about 60% for a molded part made from the cured composition and measured after the composition has been cured between 18-24 minutes at a temperature of 550° F.

公开(公告)号：US20180142081A1

公开(公告)日：2018-05-24

申请号：US15815437

申请日：2017-11-16

申请人： Equistar Chemicals, LP

发明人： Steven W. Horwatt ,  Kelly A. Enderle

IPC分类号： C08K5/3492 ,  C08K5/524 ,  C08L23/08 ,  C08K5/098 ,  C08K3/26

摘要： Provided herein are polyolefin-based compositions useful for making rotomolded parts having useful properties, including those related to impact resistance and color. In one aspect, there are provided compositions comprising (a) a rotational molded polyolefin, comprising a resin, wherein the resin is polyethylene or a copolymer thereof, having a melt index (MI) ranging from about 1 g/10 minutes to about 10 g/10 minutes; and (b) an additive package comprising: (i) an antioxidant; (ii) a processing stabilizer; (iii) optionally a UV light stabilizer; (iv) optionally a fatty acid-based acid scavenger comprising a metal salt of a fatty acid; and (v) a dihydrotalcite-based acid scavenger present in the composition at between about 800 ppm to about 3,000 ppm. In some embodiments, the ARM Impact Percent Ductility is greater than or equal to about 60% for a molded part made from the cured composition and measured after the composition has been cured between 18-24 minutes at a temperature of 550° F.

公开(公告)号：US20180030252A1

公开(公告)日：2018-02-01

申请号：US15400562

申请日：2017-01-06

申请人： Equistar Chemicals, LP

发明人： Harilaos Mavridis ,  Chun D. Lee ,  Steven W. Horwatt ,  Sameer D. Mehta

IPC分类号： C08L23/06 ,  B29C47/00 ,  F16L9/127 ,  C08L23/14

CPC分类号： C08L23/06 ,  B29C48/022 ,  B29C48/09 ,  B29K2023/065 ,  B29K2023/0675 ,  B29K2023/0691 ,  B29L2023/22 ,  C08L23/14 ,  C08L2203/18 ,  C08L2205/02 ,  C08L2205/025 ,  C08L2207/062 ,  F16L9/12 ,  F16L9/127 ,  C08K5/14

摘要： The present disclosure relates to pipes comprising bimodal high molecular weight high density polyethylene which has been extruded in the presence of one or more organic peroxides that are present in an amount ranging from 30 ppm to 200 ppm. The pipe has an improved long-term hydrostatic strength. Also provided are methods for preparing pipes having these characteristics.