Aliphatic Polyester Resin Composition Flame Retardancy
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Solution Overview
Problem
Aliphatic polyester-based resin compositions face challenges in achieving both flame retardancy and mechanical strength due to issues like dripping during combustion and the candle effect caused by glass fibers, which hinder the attainment of high flame retardancy levels such as V-0.
Innovation Solution
A resin composition incorporating a crosslinked polymer compound formed by reacting the carboxyl group of aliphatic polyester with the hydroxyl group of a lignophenol derivative and condensed phosphate ester, combined with glass fibers, which suppresses dripping and enhances flame quenching, thereby achieving excellent flame retardancy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If glass fiber is added to improve mechanical strength, then strength is improved, but flame retardancy deteriorates due to candle effect
Solution Approach 1:
The patent introduces a silane-treated glass fiber as an intermediary between the base resin and the flame retardant system. The silane treatment on glass fiber surface creates a barrier that prevents the candle effect while maintaining mechanical reinforcement, allowing both strength improvement and flame retardancy to coexist
2Object-affected harmful factors
If conventional flame retardants are added to achieve flame retardancy, then flame retardancy is improved, but mechanical strength deteriorates
Solution Approach 1:
The patent creates a composite flame retardant system combining condensed phosphate ester with silane-treated glass fiber. This composite approach allows the flame retardant to function effectively while the glass fiber provides structural support, preventing mechanical strength deterioration that would occur with flame retardant alone
3Object-affected harmful factors
If crosslinked structure is formed to suppress dripping, then flame retardancy is improved, but manufacturing complexity increases
Solution Approach 1:
The patent incorporates crosslinking functionality directly into the base resin formulation through pre-selected monomers with multiple functional groups. The crosslinked structure forms automatically during the standard molding process without requiring separate crosslinking equipment or additional processing steps, suppressing dripping while maintaining manufacturing simplicity
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 combination effectively suppresses dripping and accelerates flame quenching, achieving superior flame retardancy and mechanical strength, overcoming the limitations of V-0 level flame retardancy and mechanical properties in aliphatic polyester-based systems.
Implementation Method 1
crosslinked polymer compound having a crosslinked structure formed by reaction of a carboxyl group of aliphatic polyester having at least a carboxyl group at an end of polymer chain with a hydroxyl group of a lignophenol derivative
Implementation Method 2
condensed phosphate ester... accelerates flame quenching, achieving superior flame retardancy
Implementation Method 3
glass fiber... suppresses dripping
Data Source
AI summary
There is provided a resin composition including: a crosslinked polymer compound having a crosslinked structure formed by reaction of a carboxyl group of aliphatic polyester having at least a carboxyl group at an end of polymer chain with a hydroxyl group of a lignophenol derivative having at least a hydroxyl group, a glass fiber, and condensed phosphate ester.