Alkali Polysilicate Paint for Open-Pored Plaster Renovation
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Solution Overview
Problem
Open-pored plaster layers used in sound-absorbing applications are prone to dirt accumulation, leading to a loss of their bright color and sound-absorbing properties, as conventional cleaning methods can clog pores and standard paint coatings close off pore surfaces, making maintenance expensive and ineffective.
Innovation Solution
A paint formulation using an inorganic binder on an alkali polysilicate base, combined with pigments and a stabilizer on a silicate base, applied via an airless spraying technique to maintain open pores and restore the original color without compromising sound absorption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If standard paint coating is applied to clean the plaster surface, then the color is restored, but the pore surfaces are closed off and sound-absorbing properties are lost
Solution Approach 1:
The patent uses a porous silica gel structure as the base material for the plaster layer, which maintains open pores even after paint application. The porous structure allows the paint to adhere to the surface while leaving the pore channels open for sound absorption, thus resolving the contradiction between color restoration and sound-absorbing property preservation.
Solution Approach 2:
The patent employs a composite material system consisting of porous particles (silica gel), binder, and paint formulation. This composite structure enables the plaster to simultaneously achieve bright surface color through paint coverage and maintain sound absorption through the preserved porous network, resolving the trade-off between aesthetics and acoustic performance.
2Object-affected harmful factors
If conventional cleaning methods are used to remove dirt, then the surface is cleaned, but the pores become clogged and sound absorption deteriorates
Solution Approach 1:
The use of porous silica gel particles with controlled pore structures provides a robust pore network that resists clogging during cleaning processes. The pores maintain their openness even after cleaning, allowing sound waves to pass through while the surface can be effectively cleaned of dirt accumulation.
Solution Approach 2:
The patent introduces a specially formulated paint as an intermediary substance that adheres to the porous surface without blocking the pores. This paint layer serves as a protective coating that prevents further dirt accumulation while allowing the underlying porous structure to remain accessible for sound absorption.
3Stability of the object's composition
If binder amount is increased to improve joining of grains, then the plaster layer stability improves, but the pores become clogged and sound absorption decreases
Solution Approach 1:
The patent uses porous silica gel particles as the main grain component, which inherently provide structural stability through their porous network. This allows the use of minimal binder amounts while maintaining plaster layer stability, as the porous particles themselves form a stable framework that does not clog the sound absorption pores.
Solution Approach 2:
The patent changes the physical and chemical parameters of the binder system by using specific ratios of inorganic binder to organic binder, and controlling the binder content to minimal amounts. This parameter optimization ensures sufficient adhesion and stability while preventing pore clogging, thus maintaining sound-absorbing properties.
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 paint effectively prevents pore clogging, maintains the open structure of the plaster layer, and restores the original color and sound-absorbing properties, ensuring a uniform appearance and performance.
Implementation Method 1
The paint is applied in a thin layer over the complete surface of the plaster layer in a solvent-free manner using an airless spraying technique under high pressure
Implementation Method 2
a paint comprises: water; an inorganic binder on an alkali polysilicate base; a pigment composed of particles
Implementation Method 3
a stabilizer, to prevent an insoluble sedimenting of the pigment particles, composed of relatively small stabilizer particles on a silicate base with an average maximum expansion below 3 μm, the stabilizer particles being distributed colloidal in the water
Data Source
AI summary
For renovating an open-pored plaster layer, a paint is made available that includes water, an inorganic binder on an alkali polysilicate base, a pigment composed of particles and a stabilizer. The stabilizer is composed of small particles on a silicate base, having an average diameter below 3 μm, wherein these particles are colloidal distributed in water because of their charge distribution. As a result, the stabilizer prevents an insoluble sedimenting of the pigment particles. Following the application of this paint, the desired and in particular the original color shade is again uniformly present across the complete surface, and the cohesive pores extending through the plaster layer are essentially still open. The sound-absorbing effect of the porous plaster layer is therefore not substantially impaired as a result of the renovation.