Hybrid Foam Strength and Adhesion via Polymer Composite
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Solution Overview
Problem
Cementitious foams in the construction industry lack sufficient strength and adhesive properties due to their brittleness, which existing technologies have not effectively addressed.
Innovation Solution
A hybrid foam is developed containing a mineral binder, a styrene-acrylate copolymer, a surface-active substance, and a thickener, with optional additives, which reduces brittleness and enhances strength and adhesive properties by incorporating a polymer with ethylenically unsaturated monomer units or polyisocyanates and polyols, and using a cellulose ether to improve viscosity and water retention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If cementitious foams are used for construction applications, then insulating performance is achieved, but brittleness results in insufficient strength and adhesive properties
Solution Approach 1:
The patent applies composite materials by combining cementitious binder with organic polymers (styrene-acrylate copolymer, polyvinyl acetate, or polyurethane) to create a hybrid foam system. This composite approach integrates the insulating properties of foam with the strength and flexibility of polymer materials, directly addressing the brittleness issue while maintaining adequate adhesive properties for construction applications.
Solution Approach 2:
The patent modifies the chemical composition parameters of the foam by incorporating specific polymer types and ratios (styrene-acrylate copolymer 10-40 wt%, polyvinyl acetate 5-30 wt%, or polyurethane 5-20 wt%). These parameter changes transform the material properties, reducing brittleness and enhancing strength without compromising the insulating function.
2Strength
If polymer content is increased to reduce brittleness, then strength improves, but complexity of the foam composition increases
Solution Approach 1:
The patent applies local quality by selecting specific polymer types with particular properties (styrene-acrylate copolymer for strength, polyvinyl acetate for adhesion, polyurethane for flexibility) and optimizing their individual contributions. Each polymer component addresses specific performance requirements, allowing the formulation to achieve high strength while maintaining manageable composition complexity through targeted material selection.
Data Source
AI summary
The present invention relates to a hybrid foam, a method for producing a hybrid foam and a hybrid foam, which can be obtained by this method, and the use of the hybrid foam for bonding, filling and/or insulating.