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Patent Searching and Data


Title:
POLYPROPYLENE RESIN FOR ELECTRIC WIRE INSULATION
Document Type and Number:
WIPO Patent Application WO/2019/143008
Kind Code:
A1
Abstract:
The present invention relates to an ethylene-propylene block copolymer resin which is suitable for an insulation layer of a power cable because of the excellent properties of flexibility, heat distortion, and brittleness temperature and good dielectric breakdown strength, and which exhibits production stability upon polymerization because of excellent fluidity of polypropylene powder in spite of high content of a rubber polymer. More particularly, the ethylene-propylene block copolymer resin according to an embodiment of the present invention is prepared as a propylene homopolymer or an ethylene-propylene random copolymer is stepwise polymerized, in a reactor, with an ethylene-propylene rubber copolymer in the presence of a Ziegler-Natta catalyst that is obtained using two kinds of internal electron donors, wherein one of the two kinds of internal electron donors is a compound comprising an ester group and an alkoxy group, the ethylene-propylene random copolymer has a melting point of 150-160℃, and contains 30-50 wt% of a solvent extract extracted with xylene at room temperature, the solvent extract having an intrinsic viscosity of 1.5-3.0 dl/g.

Inventors:
KIM, BongSeock (103 Dokgot 2-ro, Daesan-eupSeosan-Si, Chungcheongnam-do, 31900, KR)
LEE, Youngjoo (103 Dokgot 2-ro, Daesan-eupSeosan-Si, Chungcheongnam-do, 31900, KR)
CHOI, Youngwook (103 Dokgot 2-ro, Daesan-eupSeosan-Si, Chungcheongnam-do, 31900, KR)
CHUN, YongSung (103 Dokgot 2-ro, Daesan-eupSeosan-Si, Chungcheongnam-do, 31900, KR)
Application Number:
KR2018/013511
Publication Date:
July 25, 2019
Filing Date:
November 08, 2018
Export Citation:
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Assignee:
HANWHA TOTAL PETROCHEMICAL CO., LTD. (103 Dokgot 2-ro, Daesan-eupSeosan-Si, Chungcheongnam-do, 31900, KR)
International Classes:
C08F297/08; C08F4/645; C08F4/646; C08F4/649; C08F4/654; C08F4/659; C08L53/00; H01B3/44; H01B7/02
Attorney, Agent or Firm:
WI, Jeong Ho (City Office Tower, No. 905 411, Yanghyeon-ro,Jungwon-Gu, Seongnam-Si, Gyeonggi-do, 13438, KR)
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