Supercharge Your Innovation With Domain-Expert AI Agents!

Polypropylene for insulation of power cables

A power cable and polypropylene resin technology, applied in the field of polypropylene resin, can solve the problems of increased cost, reduced flexibility, and reduced physical properties

Active Publication Date: 2021-04-20
HANWHA TOTAL ENERGIES PETROCHEMICAL CO LTD
View PDF10 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the disclosed power cables include additional kneaded rubber to overcome the reduced flexibility due to the high stiffness of polypropylene, which may degrade some physical properties
Furthermore, the addition of organic nucleating agents to reduce the crystal size may lead to increased costs and occasional disadvantages

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Polypropylene for insulation of power cables
  • Polypropylene for insulation of power cables
  • Polypropylene for insulation of power cables

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-3 and comparative example 1-5

[0035]The ethylene-propylene impact copolymers prepared in the inventive examples and comparative examples were prepared using Mitsui's Hypol process for the preparation of polypropylene, where two bulk reactors and two gas phase reactors are connected in series and a continuous polymerization process is possible . Ziegler-Natta catalysts using internal donors with phthalate groups. Triethylaluminum was used as cocatalyst and dicyclopentyldimethoxysilane as donor. The operating temperature and pressure of the first and second stage reactors (which are bulk reactors) are 68 to 75°C and 30 to 40kg / cm 2 and 68 to 75°C and 25 to 35kg / cm 2 . The operating temperature and pressure of the third and fourth stage reactors (which are gas phase reactors) are 75 to 82 ° C and 15 to 20 kg / cm 2 and 68 to 75°C and 10 to 17kg / cm 2 . Propylene is injected separately into the first, second and third stage reactors to produce propylene homopolymer, or ethylene is additionally injected into...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
melting pointaaaaaaaaaa
melt flow indexaaaaaaaaaa
glass transition temperatureaaaaaaaaaa
Login to View More

Abstract

Provided is a polypropylene resin for an insulating layer of a power cable, which has excellent flexibility, thermal deformation and low-temperature impact resistance, and high dielectric breakdown strength, and is suitable for an insulating layer of a power cable. In an exemplary embodiment, the polypropylene resin comprises an ethylene-propylene impact copolymer consisting of a polymerized propylene homopolymer or ethylene-propylene random copolymer (a) and an ethylene-propylene copolymer rubber (b), wherein The ethylene-propylene impact copolymer has a melting temperature (Tm) in the range of 145°C to 170°C, the rubber group in the ethylene-propylene impact copolymer measured by the content of solvent extractables (xylene solubles, room temperature) The content of the component is in the range of 35% by weight to 55% by weight, and the rubber component has two glass transition temperatures (Tg) in the range of -25°C to -35°C and -45°C to -55°C.

Description

[0001] cross reference [0002] This application claims priority and benefit from Korean Patent Application No. 10-2017-0129829 filed with the Korean Intellectual Property Office on October 11, 2017, and all rights under 35 U.S.C.119, the entire contents of which are incorporated by reference Incorporated into this article. technical field [0003] The present invention relates to polypropylenes for use in insulating layers of power cables. More particularly, the present invention relates to non-crosslinked polypropylene having excellent mechanical properties and recyclability, and more particularly to polypropylene resins for power cable insulation having excellent flexibility, thermal deformation and low temperature Impact resistance and high dielectric breakdown strength are suitable for the insulation layer of power cables. Background technique [0004] Typical power cables include insulation usually made of cross-linked forms of polyethylene or ethylene-propylene rubb...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/12C08L23/14
CPCC08L23/12C08L23/14C08L2203/202C08L2207/02C08L23/16H01B3/307H01B9/00
Inventor 金奉奭全龙成李殷雄
Owner HANWHA TOTAL ENERGIES PETROCHEMICAL CO LTD
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com