Particulate Emulsifiers in Siloxane Coating Masses
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Solution Overview
Problem
Existing adhesive coating compositions that combine (meth)acrylated polysiloxanes and organic (meth)acrylated compounds often lack permanent homogeneity, leading to segregation and increased viscosity, making them difficult to handle and apply, especially in coating processes that require stable, low-viscosity mixtures.
Innovation Solution
Incorporating particulate hydrophobic emulsifiers such as hydrophobically modified silicas and silicone resin particles with an average particle size less than 1000 nm to create permanently homogeneous, low-viscosity coating compositions that remain stable to sedimentation for at least 14 days, using a combination of (meth)acrylated polysiloxanes and (meth)acrylated organic compounds with these emulsifiers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If (meth)acrylated polysiloxanes and organic (meth)acrylated compounds are mixed to achieve targeted abhesiveness adjustment, then the abhesiveness can be optimized, but the mixture lacks permanent homogeneity and undergoes segregation
Solution Approach 1:
The patent introduces a coupling agent as an intermediary substance that mediates between the inorganic filler particles and the organic (meth)acrylated compounds. The coupling agent has dual functionality: it adheres to the inorganic filler surface through chemical or physical interaction while also being compatible with the organic polymer matrix, thereby preventing segregation and maintaining permanent homogeneity in the coating composition.
Solution Approach 2:
The patent creates a composite coating composition that combines inorganic filler particles with organic (meth)acrylated compounds. This composite system leverages the complementary properties of both components: the inorganic fillers provide abrasion resistance and structural stability, while the organic compounds provide adhesion and flexibility. The composite structure prevents phase separation and maintains homogeneity.
2Strength
If conventional fillers are added to improve coating properties, then abrasion resistance can be enhanced, but the viscosity increases significantly
Solution Approach 1:
The patent changes the particle size parameter of the inorganic fillers to the nanometer range (1-100 nm). This dramatic reduction in particle size from conventional filler dimensions fundamentally alters the rheological behavior of the coating composition. The nanoscale particles have significantly lower impact on viscosity while maintaining their reinforcing and abrasion-resistant properties, thus resolving the contradiction between strength enhancement and ease of operation.
Solution Approach 2:
The patent utilizes inorganic fillers with controlled porous structures that provide high surface area to volume ratios. These porous nanofillers enhance abrasion resistance through mechanical interlocking and increased surface interaction, while their small effective volume and ability to pack efficiently minimize the disruption to the continuous phase flow, thereby limiting viscosity increase.
3Reliability
If inorganic fillers are used to enhance coating properties, then durability can be improved, but the coating gloss and surface finish are affected
Solution Approach 1:
The patent changes the size parameter of inorganic fillers to the nanometer scale (1-100 nm), which fundamentally alters their interaction with light. At this scale, the fillers no longer scatter visible light in a way that creates visible surface roughness or reduces gloss. Instead, they provide durability enhancement through chemical reinforcement and abrasion resistance while remaining optically transparent, thus maintaining the desired surface finish.
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 use of particulate emulsifiers results in stable, low-viscosity coatings that maintain homogeneity and prevent segregation, allowing for easier application and curing, with minimal impact on gloss, roughness, and friction coefficient, while ensuring effective adhesion and release properties.
Implementation Method 1
particulate hydrophobic emulsifiers such as hydrophobically modified silicas
Implementation Method 2
Incorporating particulate hydrophobic emulsifiers such as hydrophobically modified silicas and silicone resin particles
Implementation Method 3
silicone resin particles with an average particle size less than 1000 nm
Implementation Method 4
remain stable to sedimentation for at least 14 days
Implementation Method 5
The other system cures using a free radical polymerization mechanism after irradiation with UV or electron beams
Implementation Method 6
cures using a free radical polymerization mechanism after irradiation with UV or electron beams
Data Source
AI summary
Radiation-curable coating material comprises at least two (meth)acrylate-functional compounds, including at least one (meth)acrylate-functional polysiloxane and optionally one or more (meth)acrylate-functional organic compounds, and a particulate emulsifier with an average particle size of less than 1000 nm.