Title:
ポリエチレン樹脂組成物並びにこれを含む配管材料、配管及び継手
Document Type and Number:
Japanese Patent JP6693833
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To prevent fundamental defects of polyethylene, brittle fracture cracks and stress cracks.SOLUTION: A polyethylene resin composition contains a base material predominantly composed of polyethylene, and an additive. The additive contains an oil containing naphthene with 20% or more and 100% or less of %CN in ring analysis by n-d-M method, out of the oils produced in purification of naphthene crude oil.SELECTED DRAWING: Figure 2
Inventors:
Book stick Kyoko
Keiji Terao
Junya Nagata
Keiji Terao
Junya Nagata
Application Number:
JP2016153559A
Publication Date:
May 13, 2020
Filing Date:
August 04, 2016
Export Citation:
Assignee:
Hitachi ge Nuclear Energy Co., Ltd.
International Classes:
C08L23/06; C08L91/00; F16L9/02; F16L47/02; G21D1/00
Domestic Patent References:
| JP2016125928A | ||||
| JP2016050268A | ||||
| JP2010168556A | ||||
| JP51087986A | ||||
| JP2007211068A |
Other References:
山口隆,石油系軟化剤,日本ゴム協会誌,1977年,Vol.50, No.10,p.664(72)-671(79)
早川直宏,放射線による高分子材料の劣化,放射線化学,1978年,Vol.13, No.25,p.3-7
早川直宏,放射線による高分子材料の劣化,放射線化学,1978年,Vol.13, No.25,p.3-7
Attorney, Agent or Firm:
Polaire Patent Business Corporation