Superabsorbent Polymer Mineral Binder Foam Stabilization
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Solution Overview
Problem
Current methods for producing lightweight, thermally insulated building products face challenges in achieving stable foams with improved thermal insulation characteristics, mechanical properties, and ease of application, particularly in avoiding the use of hazardous materials like aluminum powder and costly autoclaving processes.
Innovation Solution
The use of a mixture comprising a mineral binder and a SuperAbsorbent Polymer (PSA) in dry compositions to create wet formulations that reduce thermal conductivity and enhance mechanical properties of hardened building products, allowing for lightweight, thermally efficient, and easily applicable building materials without the need for aluminum powder or autoclaving.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If aluminum powder is used to generate hydrogen in situ for creating foam structures, then lightweight building products with thermal insulation properties can be produced, but safety hazards due to explosive nature of aluminum powder and high cost of autoclaving process are introduced
Solution Approach 1:
The patent removes aluminum powder from the composition entirely, extracting the hazardous element while retaining the desired foam structure formation through alternative means (air entrainment during mixing), thereby eliminating safety hazards associated with explosive materials
Solution Approach 2:
The invention changes the fundamental parameter of gas generation from chemical reaction (hydrogen from aluminum) to physical entrainment (air bubbles during mixing), fundamentally altering how the foam structure is created and eliminating the need for hazardous reactive materials
2Strength
If aluminum powder and autoclaving process are used to produce lightweight blocks, then thermal insulation and mechanical resistance properties are achieved, but production cost and process complexity increase significantly
Solution Approach 1:
The composition self-stabilizes the air bubbles during mixing without requiring external autoclaving treatment, with the superabsorbent polymer and other components working together to maintain foam structure naturally during and after mixing, eliminating the need for costly industrial autoclaving facilities
Solution Approach 2:
The patent employs conventional, readily available building materials and standard mixing procedures that can be performed with simple equipment, replacing the need for expensive autoclaving infrastructure and making the process accessible to small-scale producers and individual builders
3Temperature
If air is entrained during mixing to create foam, then lightweight building products can be produced, but foam stability is difficult to maintain without compromising workability or mechanical properties
Solution Approach 1:
The patent creates a composite system where superabsorbent polymer, water retention agent, and air-entraining agent work synergistically - the superabsorbent polymer absorbs excess water and stabilizes the foam structure, while the water retention agent maintains workability, allowing both foam stability and good mechanical properties to coexist
Solution Approach 2:
The invention modifies the rheological parameters of the mixture through careful selection of polymer concentration and water retention agents, creating an optimal balance where the mixture remains workable during application but stabilizes the foam structure sufficiently to maintain air bubbles and achieve desired thermal insulation
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
This approach results in building products with significantly reduced thermal conductivity, improved mechanical strength, and simplified production processes, making them more economical and safer to use, while maintaining excellent thermal and mechanical performance.
Implementation Method 1
a superabsorbent polymer (PSA) (b), in a dry composition based on a mineral binder
Implementation Method 2
capable of absorbing at least 30, 50, 100, 200, 300, 400 times their weight
Data Source
Figure 1~2
AI summary
The invention relates to the use of a mixture including a mineral binder (a) and at least one superabsorbent polymer (PSA) (b) aimed at improving the thermal isolation properties of a hardened product used in the building industry, by lowering the thermal conductivity thereof lambda (W.m-1.K-1), said hardened product being obtained from a dry composition or from a moist formulation including said mixture. The invention further relates to the dry composition, to the moist formulation obtained by mixing said dry composition with water, to the methods for preparing said dry composition and the corresponding moist formulation, to the hardened construction products obtained from the moist formulation, and to the structures produced using said products.