Flame-Retardant Resin Composition for Outdoor Cables
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Solution Overview
Problem
The existing flame retardant resin compositions used for cables lack sufficient weather resistance, making them unsuitable for outdoor use despite their excellent flame retardancy.
Innovation Solution
A flame retardant resin composition is developed, comprising a polyolefin-based compound, a silicone-based compound, a fatty acid metal salt, calcium carbonate or silicate particles, a hindered phenol-based compound, and a hindered amine-based compound, with specific blending ratios and structural groups, which enhances both flame retardancy and weather resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If fatty acid is used as fatty acid-containing compound, then neutralization reaction may occur with hindered amine compound, but activity of hindered amine compound is inhibited
Solution Approach 1:
The invention optimizes the structural parameters of the hindered amine compound by specifying molecular weights of 500-2000 and particular structural formulas with bulky substituent groups. These parameter changes reduce the compound's basicity and steric accessibility, minimizing neutralization reactions with fatty acids while maintaining sufficient activity for UV stabilization and flame inhibition functions.
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 composition improves weather resistance while maintaining excellent flame retardancy, making the cable suitable for outdoor use by forming a surface barrier layer during combustion and optimizing the interaction between fatty acid metal salts and hindered amine-based compounds.
Implementation Method 1
the hindered amine based compound has a monovalent group represented by formula (1) or a divalent group represented by formula (2)... the weather resistance can be improved while securing excellent flame retardancy
Implementation Method 2
the flame retardant agent consisting of at least one component selected from the group consisting of calcium carbonate particles and silicate compound particles... forming a surface barrier layer during combustion
Data Source
AI summary
Disclosed is a flame retardant resin composition in which relative to 100 parts by mass of the base resin, a silicone based compound is blended at a ratio of 0.1 to 10 parts by mass a fatty acid metal salt is blended at a ratio of 0.1 to 20 parts by mass, a flame retardant agent is blended at a ratio of 5 to 200 parts by mass, a hindered phenol based compound is blended at a ratio of 0.05 to 10 parts by mass, and a hindered amine based compound is blended at a ratio of 0.05 to 10 parts by mass. The hindered amine based compound has a group represented by the following formula (1).(R1 represents an alkyl or alkoxy group having 1 to 30 carbon atoms, and R2 to R5 each independently represent an alkyl group having 1 to 6 carbon atoms).