Hybrid Polymer Coating for Marble Agglomerate Scratch Resistance
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Solution Overview
Problem
Marble agglomerate surfaces have low resistance to scratching and poor chemical resistance against acids, limiting their use in thin substrates and requiring costly manufacturing processes, while existing coatings do not effectively provide the necessary protection and recyclability.
Innovation Solution
A hybrid low viscosity polymer coating comprising micronized powder and gravels of different grading, bound by a polymerizable resin, is applied directly to the substrate, achieving a high concentration of inorganic loads at the coating-substrate interface to provide mechanical and chemical protection comparable to quartz or granite, using a thin layer of less than 1 mm.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a thin coating layer is applied to provide protection, then material usage is reduced and productivity is improved, but the coating may not provide sufficient protection against scratching and chemical attack
Solution Approach 1:
The patent applies a hybrid polymer coating combining organic polymer matrix with inorganic fillers (silica, quartz, glass particles) to create a composite material that provides both adequate thickness for protection and thin layer application. The composite structure allows the coating to achieve protective properties comparable to quartz while maintaining a thin profile that improves manufacturing productivity.
Solution Approach 2:
The coating formulation uses different particle sizes (micronized powder and gravels of different grading) distributed throughout the polymer matrix to create local variations in properties. The micronized powder provides base protection while the gravel particles enhance surface hardness and scratch resistance, allowing the thin coating to provide sufficient protection without increasing overall thickness.
2Reliability
If quartz or granite substrates are used to provide hardness and chemical resistance, then protection is improved, but substrate thickness must be increased and manufacturing costs increase
Solution Approach 1:
The patent creates a composite coating system that mimics the protective properties of quartz or granite substrates by incorporating inorganic fillers (silica, quartz particles, glass) into a polymer matrix. This composite approach provides comparable hardness and chemical resistance to natural stone while allowing for thinner overall substrate thickness, thus resolving the contradiction between protection level and substrate thickness.
3Reliability
If natural stone substrates are used, then aesthetic properties are maintained, but resistance to scratching and chemical attack deteriorates
Solution Approach 1:
The hybrid polymer coating combines the aesthetic properties of natural stone with the protective qualities of quartz by incorporating inorganic fillers (silica, quartz particles) into the coating matrix. The coating can be applied over natural stone substrates to provide enhanced scratch and chemical resistance while preserving the underlying aesthetic appearance, or can replicate stone appearance directly.
Solution Approach 2:
The patent modifies the surface properties of the substrate by applying a coating with different material parameters (higher hardness, better chemical resistance) than the natural stone substrate. The coating formulation uses specific polymer-resin combinations and inorganic filler ratios to achieve parameters that exceed the protective capabilities of natural stone while maintaining aesthetic compatibility.
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 coating enhances the hardness and chemical resistance of marble agglomerate substrates, allowing for the use of thinner materials and incorporating recycled waste, while reducing production costs and enabling the use of defective slabs, thus improving the recyclable material content and surface durability.
Implementation Method 1
a hybrid low viscosity polymer coating comprising micronized powder and gravels of different grading, bound by a polymerizable resin
Data Source
AI summary
A coating having a thickness between 0.1 and 2 mm is obtained from a mixture with the following composition: 10-25% by weight of micronized powder; 40-60% by weight of inorganic gravels of petrographic origin of sizes comprised between 0.063-2 mm; 10-40% by weight of a polymerisable base resin selected from polyurethane, polyester, epoxy or acrylic, with additives, and optionally pigments. The proportion of the mentioned gravel and micronized powder of the coating being up to 90% in an inner most area of interphase between coating and surface of the petrous substrate, covering one third of the thickness of the coating. The method comprises depositing the mentioned mixture on the substrate and vibrating the assembly, and subsequently proceeding to a step of curing and subsequent mechanical finishing of the surface.