Branched Polysiloxane Composition for High-Speed Coating Mist Reduction
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Solution Overview
Problem
Existing silicone-based paper release coating formulations face significant misting issues at high speeds, posing manufacturing challenges and industrial hygiene risks, with existing mist suppressants either being costly or difficult to produce and apply broadly.
Innovation Solution
A branched polysiloxane composition is developed through copolymerizing organosilicon compounds with unsaturated hydrocarbon functional groups and silylhydride-containing compounds under hydrosilylation conditions, optimizing the molar ratio of these functional groups to enhance mist reduction while being economical and easy to use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If high speed roll coating is used to increase productivity, then coating speed increases, but misting and aerosoling become significant problems
Solution Approach 1:
The patent converts the harmful effect of high-speed coating (misting) into a beneficial outcome by formulating a mist suppressant that uses the kinetic energy and shear forces present at high speeds to activate the suppressant mechanism, thereby reducing misting rather than merely tolerating it
Solution Approach 2:
The patent changes the physical and chemical parameters of the coating formulation by incorporating specific organosilicon compounds with controlled molecular weights, functional group ratios, and viscosities that optimize performance at high coating speeds while suppressing mist formation
2Object-generated harmful factors
If existing mist suppressant formulations are used to reduce misting, then mist reduction is achieved, but cost increases and production complexity increases
Solution Approach 1:
The patent creates a universal mist suppressant formulation that can be applied across multiple coating systems and applications. The suppressant works effectively across a broad range of coating speeds, viscosities, and substrate types, eliminating the need for application-specific formulations and reducing overall manufacturing complexity
Solution Approach 2:
The patent employs cost-effective organosilicon compounds that can be readily synthesized or sourced, replacing expensive specialized additives. The formulation uses readily available starting materials and straightforward synthesis procedures, reducing both material costs and manufacturing complexity
3Object-generated harmful factors
If existing mist suppressant formulations are used to reduce misting, then mist reduction is achieved, but ease of use and broader application are limited
Solution Approach 1:
The patent develops a highly adaptable mist suppressant formulation that maintains effectiveness across diverse coating applications, speeds, and conditions. The formulation requires minimal adjustment for different applications and integrates easily with various coating systems, enhancing both ease of use and versatility
Solution Approach 2:
The patent creates a dynamic formulation that adapts to varying operating conditions. The suppressant maintains optimal performance across a wide range of coating speeds, viscosities, and environmental conditions without requiring formulation changes, providing inherent adaptability to different application scenarios
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 branched polysiloxane composition effectively reduces misting, offering improved performance, cost savings, and broader application in the paper coating industry, while maintaining ease of production and use.
Implementation Method 1
copolymerizing under hydrosilylation conditions a component mixture comprising: (a) one or more organosilicon compounds containing at least two unsaturated hydrocarbon functional groups per molecule, said unsaturated hydrocarbon functional groups capable of undergoing a hydrosilylation reaction with a silylhydride-containing compound under hydrosilylation conditions
Data Source
AI summary
The invention relates to branched polysiloxane compositions resulting from copolymerizing under hydrosilylation conditions a component mixture comprising (a) one or more organosilicon compounds containing at least two unsaturated hydrocarbon functional groups per molecule, and (b) one or more silylhydride-containing compounds containing at least two silylhydride functional groups per molecule, with the provision that (i) at least one component (a) or (b) contains at least three functional groups per molecule; (ii) a component (a) or (b) having a higher number of functional groups per molecule is present in a molar amount equal to or lower than a molar amount of the other component (a) or (b) having a lower number of functional groups per molecule; and (iii) unsaturated hydrocarbon compounds are excluded from the component mixture.