 약 93중량% 이상의 폴리에틸렌, 약 40중량% 내지 75중량% 에틸렌 공중합체를 함유한 B 블록 및 하나이상의 α-올레핀을 함유하고, 약 60중량% 내지 약 80중량% 평균 에틸렌함량을 갖는 저분자량 블록공중합체를 함유한 점도 조절제.
A viscosity modifier comprising a low molecular weight block copolymer including A blocks and B blocks, wherein the A blocks comprise at least about 93 wt.% polyethylene and the B blocks comprise a copolymer of between about 40 wt.% to 75 wt.% ethylene and at least one other alpha -olefin; wherein the resulting block copolymer has an average ethylene content of between about 60 wt.% to 80 wt.%.