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Title:
BIAXIALLY ORIENTED POLYPROPYLENE DIELECTRIC FILM, MODIFIED POLYPROPYLENE MATERIAL AND USE THEREOF
Document Type and Number:
WIPO Patent Application WO/2023/130848
Kind Code:
A1
Abstract:
The present invention belongs to the field of polymers, and relates to a biaxially oriented polypropylene dielectric film, a modified polypropylene material and the use thereof. The preparation raw materials of the biaxially oriented polypropylene dielectric film comprise a modified polypropylene grafted with an alkenyl-containing functional monomer. The modified polypropylene grafted with an alkenyl-containing functional monomer comprises a structural unit derived from polypropylene as a matrix phase and a structure unit derived from an alkenyl-containing functional monomer as a dispersion phase. The ash content of the modified polypropylene grafted with an alkenyl-containing functional monomer is less than 50 ppm. In the modified polypropylene grafted with an alkenyl-containing functional monomer, the mass ratio of the structural unit which is derived from an alkenyl-containing functional monomer and in a grafted state to the structure unit which is derived from an alkenyl-containing functional monomer and in a self-polymerization state is greater than or equal to 1.0. D50 of the dispersion phase is less than 450 nm. The biaxially oriented polypropylene dielectric film of the present invention can keep good dielectric performance and energy storage performance at a relatively high working temperature, and is suitable for high-temperature and high-operation field intensity working conditions.

Inventors:
ZHANG YARU (CN)
LI QI (CN)
ZHANG QI (CN)
YUAN HAO (CN)
HE JINLIANG (CN)
SHAO QING (CN)
LI JUNLUO (CN)
QUAN HUI (CN)
WANG MINGTI (CN)
HU JUN (CN)
LI JUAN (CN)
GAO DALI (CN)
ZHANG LONGGUI (CN)
HU SHIXUN (CN)
LU HONGCHAO (CN)
XIA LIDONG (CN)
Application Number:
PCT/CN2022/133482
Publication Date:
July 13, 2023
Filing Date:
November 22, 2022
Export Citation:
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Assignee:
CHINA PETROLEUM & CHEM CORP (CN)
SINOPEC BEIJING RES INSTITUTE OF CHEMICAL INDUSTRY CO LTD (CN)
UNIV TSINGHUA (CN)
International Classes:
H01B3/30; B29C55/12; B32B27/32; C08F212/08; C08F222/06; C08F230/08; C08F255/02; C08J5/18
Domestic Patent References:
WO2021218102A12021-11-04
WO2021218104A12021-11-04
Foreign References:
CN108699265A2018-10-23
CN113563520A2021-10-29
CN113563524A2021-10-29
CN113563525A2021-10-29
CN113563526A2021-10-29
CN113563527A2021-10-29
CN113563528A2021-10-29
CN113563529A2021-10-29
CN111072855A2020-04-28
CN101786332A2010-07-28
JP2004214641A2004-07-29
CN104804143A2015-07-29
CN103052661A2013-04-17
JP2014210841A2014-11-13
CN103764732A2014-04-30
CN1198759A1998-11-11
CN101600757A2009-12-09
CN103155207A2013-06-12
CN109694428A2019-04-30
CN109694429A2019-04-30
Attorney, Agent or Firm:
CCPIT PATENT AND TRADEMARK LAW OFFICE (CN)
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