Polymer-Coated Particles for Hydrophobic Filler–Binder Bonding
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Solution Overview
Problem
Existing composite materials face challenges in forming a strong bond between hydrophilic filler particles and hydrophobic binders, leading to weak points under stress, and current surface treatments like silanisation are costly, energy-inefficient, and unsustainable.
Innovation Solution
Particles with a hydrophobic surface coating composed of type A monomers, applied through a process involving mixing, drying, and linking at controlled temperatures, allowing for a strong bond with binders without the need for expensive silanes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If silanisation or siliconisation is used to hydrophobise particle surfaces, then bonding between particles and binder is improved, but manufacturing cost increases and energy consumption increases
Solution Approach 1:
The patent replaces expensive, energy-intensive silane/siliconisation treatments with a cost-effective polymer coating process using acrylic or polyester-based binders. The coating is applied as a slurry or suspension that forms a thin film on particle surfaces through simple mixing and drying, eliminating the need for costly chemical treatments while achieving adequate hydrophobisation for bonding.
Solution Approach 2:
The invention changes the chemical parameters of the surface treatment by using organic polymer coatings (acrylic or polyester) instead of inorganic silane/silicon compounds. The coating composition includes polymers with specific functional groups that provide both hydrophobicity and bonding capability, adjusting the chemical nature of the surface treatment to be more economical and energy-efficient.
2Quantity of substance
If hydrophilic filler particles are used with hydrophobic binders, then material cost is reduced, but bonding strength decreases creating weak points under stress
Solution Approach 1:
The patent introduces a polymer coating as an intermediary layer between the hydrophilic filler particles and the hydrophobic binder matrix. This coating layer has dual functionality: it adheres to the hydrophilic particle surface while also being compatible with the hydrophobic binder, thereby mediating the interface and enabling strong bonding without requiring expensive treated particles.
Solution Approach 2:
The invention creates a composite structure at the particle level, where the filler particle is coated with a polymer layer that combines properties of both hydrophilic and hydrophobic materials. This composite particle structure allows the bulk filler to remain inexpensive and hydrophilic while the surface coating provides the necessary hydrophobicity and bonding capability.
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 process results in a cost-effective, sustainable, and energy-efficient hydrophobic coating that enhances bonding with binders, improving the mechanical stability and color consistency of composite materials.
Implementation Method 1
linking of the polymerisable component on the surface to form a hydrophobic coating on the carrier particle
Implementation Method 2
drying the mixture at a temperature above the minimum film formation temperature (MFT) of the polymerisable component
Data Source
AI summary
The present invention relates to particles having a surface coating which is hydrophobic at least in sections, comprising carrier particles which are surface-coated at least in sections with a coating composition based on type A monomers, wherein the type A monomers are a substance of the structure,wherein R is selected from a group comprising OR1, NR1, NR1R2 and CN. The invention further relates to a method for producing such particles and a formed component comprising such particles.