Brominated Polymer Flame Retardant Thermal Stability
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Solution Overview
Problem
Brominated polymer type flame retardants used in styrene-based resin compositions suffer from insufficient thermal stability, leading to the formation of black foreign substances and discoloration when exposed to high temperatures during processing, which can impair the appearance of molded articles.
Innovation Solution
A flame-retardant resin composition combining a styrene-based resin with a brominated polymer type flame retardant, an epoxy compound, and a halogen capture agent, specifically using a dolomite-based and hydrotalcite-based compound combination, along with an antioxidant, to enhance thermal stability and prevent the occurrence of black foreign substances and discoloration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a brominated polymer type flame retardant is used as a substitute for HBCD, then environmental safety is improved, but thermal stability deteriorates causing black foreign substances and discoloration
Solution Approach 1:
An epoxy compound is introduced as an intermediary substance that reacts with the brominated polymer type flame retardant during mixing and molding processes. This intermediary forms a protective complex that prevents direct thermal degradation of the flame retardant, thereby eliminating black foreign substances while preserving the environmental safety benefits of the brominated polymer substitute
Solution Approach 2:
The chemical structure and reactivity parameters of the brominated polymer type flame retardant are modified through reaction with the epoxy compound. This parameter change transforms the thermally unstable brominated polymer into a thermally stable epoxy-bromine complex, maintaining the environmental advantages while achieving the required thermal stability for processing
2Ease of manufacture
If the brominated polymer type flame retardant is exposed to high temperature during mixing and molding, then the resin composition can be processed, but thermal deterioration occurs causing black foreign substances
Solution Approach 1:
The epoxy compound is pre-mixed with the brominated polymer type flame retardant before the high-temperature processing step. This preliminary action allows the epoxy to form a protective complex in advance, so that when the mixture is subsequently exposed to high temperatures during molding, the flame retardant is already protected and will not deteriorate, ensuring both processability and appearance quality
Solution Approach 2:
The epoxy compound acts as a cushioning agent that absorbs and mitigates the harmful effects of high-temperature exposure on the brominated polymer type flame retardant. By providing this protective cushioning before thermal deterioration can occur, the system maintains manufacturing precision and appearance quality while still allowing necessary processing
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 of epoxy compounds, halogen capture agents, and antioxidants significantly improves the thermal stability of brominated polymer type flame retardants, reducing the occurrence of black foreign substances and discoloration, resulting in flame-retardant resin molded articles with excellent appearance and processability.
Implementation Method 1
a halogen capture agent, wherein a content of bromine is 18 to 42% by mass
Implementation Method 2
an epoxy compound... the thermal stability of a brominated polymer type flame retardant is improved
Implementation Method 3
the flame-retardant resin composition further contains an antioxidant; the antioxidant is a hindered phenol-based antioxidant
Data Source
AI summary
To improve the thermal stability of a brominated polymer type flame retardant in a flame-retardant resin composition containing a styrene-based resin and the brominated polymer type flame retardant to provide a flame-retardant resin molded article in which occurrences of black foreign substances and discoloration decreaseThe flame-retardant resin composition contains a styrene-based resin, a brominated polymer type flame retardant, an epoxy compound, and a halogen capture agent, wherein a content of bromine is 18 to 42% by mass.