Halogen-Containing Flame Retardant Electric Cable Resin Composition
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Solution Overview
Problem
Existing resin compositions for automotive electric wires fail to simultaneously satisfy flame retardancy, battery fluid resistance, low-temperature impact property, and wear resistance, particularly due to the adverse effects of using halogen-containing flame retardants and polypropylene-based materials.
Innovation Solution
A resin composition for electric cables comprising 55-85 parts of polypropylene homopolymer, 5-20 parts of polypropylene-based modified resin, 5-20 parts of polyolefin-based copolymer, and 5-15 parts of modified olefin-based elastomer, along with 1-45 parts of metal hydroxide and 10-80 parts of halogen-containing flame retardant, where the polypropylene-based modified resin is prepared by graft-copolymerizing maleic anhydride, addressing the inferior low-temperature impact performance and wear resistance issues.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If polypropylene homopolymer is used to improve wear resistance, then wear resistance is improved, but low-temperature impact property deteriorates
Solution Approach 1:
The patent creates a composite resin system combining polyolefin-based polymer (providing wear resistance) with polyamide-based polymer (improving low-temperature impact property) and modified elastomer, achieving synergistic effects that balance both properties
Solution Approach 2:
The patent introduces modified elastomer (5-20 parts) as a specific component to locally improve low-temperature impact property while maintaining the overall wear resistance provided by the polyolefin-based polymer matrix
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution enables electric cables to meet flame retardancy and battery fluid resistance standards while maintaining wear resistance and low-temperature impact performance, as demonstrated by the specific blending ratios and components used.
Implementation Method 1
the polypropylene-based modified resin (B) is one prepared by graft-copolymerizing maleic anhydride to a polypropylene-based resin
Data Source
AI summary
To provide an electric cable that can satisfy flame retardancy and battery fluid resistance in the CHFUS region provided in ISO 6722 and also satisfy wear resistance and low-temperature impact property by using a halogen-containing flame retardant. An electric cable in which a coat layer is formed of a resin composition that includes (A) 55 to 85 parts by mass of a polypropylene homopolymer, (B) 5 to 20 parts by mass of a polypropylene-based modified resin, (C) 5 to 20 parts by mass of a polyolefin-based copolymer, and (D) 5 to 15 parts by mass of a modified olefin-based elastomer, respectively and further includes 1 to 45 parts by mass of a metal hydroxide and 10 to 80 parts by mass of a halogen-containing flame retardant based on 100 parts by mass of the resins (A), (B), (C), and (D) in total.