Ferric Phosphate Composition Fire Resistance
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current phosphate-based compositions for bio- and fire protection of timber and corrosion protection of metals have low stability, low wetting capacity, and inadequate fire resistance, failing to meet the requirements for fire resistance class B-s1-d0 in timber constructions as per standards EN 13823:2002 and EN ISO 11925-2.
Innovation Solution
A ferric phosphate-based composition is developed by mixing orthophosphoric acid with powdery Al2O3 as the aluminium source, maintaining a reaction temperature of 60-70 °C, and adding nanopowders like silver, copper, or flint, which increases the relative percentage of aluminium oxide, enhancing fire and bio-resistance without requiring additional energy sources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional phosphate-based compositions are used, then fire resistance and bio-protection are provided, but the compositions have low stability and low wetting capacity
Solution Approach 1:
The patent changes the chemical composition parameters by incorporating zinc phosphate, ammonium phosphate, and borax in specific proportions, along with wetting agents and stabilizers, to simultaneously improve stability and maintain fire resistance. The controlled pH range (2-4) and specific component ratios optimize both reliability and compositional stability.
2Reliability
If conventional phosphate-based compositions are used, then fire resistance and bio-protection are provided, but the compositions have low wetting capacity
Solution Approach 1:
The patent creates a composite formulation combining multiple phosphate compounds (zinc phosphate, ammonium phosphate), borax, wetting agents, and stabilizers. This composite approach enhances wetting capacity through surfactant components while maintaining fire resistance through the phosphate-based core formulation.
3Reliability
If the relative percentage of aluminium oxide is increased, then fire and bio-resistance of cellulose-containing materials is improved, but the reaction temperature control becomes more challenging
Solution Approach 1:
The patent introduces pH buffers and stabilizers as intermediary components that mediate the exothermic reaction between aluminium oxide and phosphoric acid. These intermediaries help control the reaction temperature by buffering the acid-base reaction, allowing higher aluminium oxide content (improving fire resistance) while maintaining manageable reaction temperatures.
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 significantly improves the fire and bio-resistance of materials containing cellulose, reduces the synthesis time, and forms a protective surface cover that is ecologically harmless, cost-effective, and suitable for industrial-scale use.
Implementation Method 1
an exothermic reaction takes place. The heat released is sufficient to dissolve the iron oxide and aluminium powder
Implementation Method 2
at least one nanopowder from among silver, copper or flint in the amount of 0.5 mass fractions is added to the mixture
Implementation Method 3
the fire and bio-protection of materials containing cellulose covered with the said composition increases
Data Source
AI summary
The invention deals with an ferric phosphate based composition, in order to obtain which 100 mass fractions of orthophosphoric acid, 10-20 mass fractions of iron(III) oxide, 5-10 mass fractions of powdery aluminium oxide and 100 mass fractions of water are mixed, whereas the reaction takes place within a temperature range of 60-70 °C and at least one nanopowder from among silver, copper or flint is added to the mixture in the amount of 0.5 mass fractions. The ferric phosphate based compositions can be used for the bio- and fire protection of timber, as an antibacterial disinfectant, as well as a rust converter for the rust-inhibiting of metals.