Phosphinate Flame Retardant Mixture for Polyamide Flowability
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Solution Overview
Problem
Existing flame-retardant additives for polyamides and polyesters cause increased wear on metal parts and decrease flowability, making it difficult to achieve UL 94 V-0 classification at 0.4 mm thickness and requiring frequent tool replacements due to corrosion and abrasive fillers.
Innovation Solution
A mixture of phosphinates of metals (Al, Mg, Ca, Ti, Zn, or Na) with metal soaps and salts is used, which reduces material wear and enhances flow properties while maintaining high heat resistance and fire retardancy, preventing polymer degradation or discoloration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional phosphinate flame retardants are used, then fire retardancy is improved, but material wear on metal parts increases
Solution Approach 1:
The patent combines phosphinate salts with metal soaps and metal salts to create a composite flame retardant system. This composite approach allows the phosphinates to provide fire retardancy while the metal soaps and salts reduce corrosion and wear on metal processing equipment, resolving the contradiction between effectiveness and harmful side effects.
Solution Approach 2:
Metal soaps and metal salts act as intermediary substances that mediate between the phosphinate flame retardants and the metal processing equipment. These intermediaries reduce the direct corrosive interaction between phosphinates and metal surfaces, thereby reducing wear while maintaining fire retardant properties.
2Reliability
If conventional phosphinate flame retardants are used, then fire retardancy is improved, but flowability decreases
Solution Approach 1:
The composite system of phosphinates combined with metal soaps and metal salts creates a more balanced flame retardant package. The metal soaps and salts modify the overall properties of the flame retardant mixture, maintaining fire protection while improving flow characteristics compared to using phosphinates alone.
Solution Approach 2:
The invention changes the chemical composition parameters of the flame retardant system by introducing metal soaps and metal salts. This parameter change affects the physical properties of the molding compound, particularly improving flowability while preserving fire retardant performance.
3Strength
If glass fiber reinforced polymers are used, then strength is improved, but corrosion of metal surfaces increases
Solution Approach 1:
Metal soaps and metal salts serve as intermediary protective layers between the glass fiber reinforced polymer and the metal processing equipment. These intermediaries reduce the corrosive effect of the polymer-flame retardant mixture on metal surfaces during processing.
Solution Approach 2:
The invention changes the chemical composition of the flame retardant system to include corrosion-inhibiting metal soaps and salts, which modify the interaction between the glass fiber reinforced polymer and metal surfaces, thereby reducing corrosion while maintaining strength properties.
Data Source
AI summary
The invention relates to a method for the production of flame-retardant, non-corrosive, easily flowable polyamides and polyesters, characterized in that a flame protection agent mixture made of a phosphinic acid salt of the formula (I), where M = AI, Mg, Ca, Ti, Na (component A), where R1, R2 are the same or different, and C1-C6-alkyl, linear or branched, and/or aryl; n is 1 to 3, and a metal salt of an organic acid, and/or an inorganic zinc, calcium, magnesium, potassium, sodium, aluminum, titanium, tin, antimony, bismuth, or barium compound is used as component B, wherein component A is present in the flame protection agent mixture at 70-99.5% by weight and component B at 0.5-30% by weight.