Curable Organopolysiloxane for Cold-Resistant Jet Patterning
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Solution Overview
Problem
Existing curable organopolysiloxane compositions face challenges in precision application and fine pattern formation due to droplet scattering and nozzle clogging when using fine droplet coating apparatuses, particularly at low temperatures, while maintaining excellent cold resistance and rheological properties.
Innovation Solution
A curable organopolysiloxane composition with a specific range of silicon atom-bonded aromatic functional groups and varying viscosities at different shear rates, allowing for smooth ejection and high viscosity after application, combined with a hydrosilylation reactive system, to prevent scattering and improve cold resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the viscosity of curable organopolysiloxane composition is increased to prevent droplet scattering, then precision application is improved, but nozzle clogging occurs and application amount increases
Solution Approach 1:
The patent applies parameter changes by carefully controlling the viscosity of the curable organopolysiloxane composition within the range of 10 to 1000 cP at 25°C, and adjusting the content of silicon atom-bonded aromatic functional groups to 1.5-5.0 mass%. These parameter optimizations enable the composition to be ejected smoothly from nozzles without clogging while maintaining sufficient viscosity to prevent droplet scattering after application.
2Manufacturing precision
If the viscosity of curable organopolysiloxane composition is increased to prevent droplet scattering, then precision application is improved, but the application amount per dot increases
Solution Approach 1:
The patent optimizes the viscosity parameter to 10-1000 cP at 25°C, which is sufficient to prevent droplet scattering and reduce application amount, while still allowing smooth ejection from nozzles. This parameter control prevents both scattering and excessive material usage.
3Reliability
If the content of silicon atom-bonded aromatic functional groups is increased to improve cold resistance, then cold resistance is improved, but the viscosity increases making precision application difficult
Solution Approach 1:
The patent identifies the optimal parameter range for silicon atom-bonded aromatic functional groups content as 1.5-5.0 mass%. This parameter optimization achieves excellent cold resistance in the cured product while maintaining the composition viscosity within 10-1000 cP at 25°C, enabling both precision application and cold resistance.
4Manufacturing precision
If a fine droplet coating apparatus with thin nozzle is used to achieve fine pattern formation, then pattern precision is improved, but droplet scattering occurs making fine pattern formation difficult
Solution Approach 1:
The patent optimizes the composition viscosity to 10-1000 cP at 25°C, which provides sufficient fluidity for smooth ejection from thin nozzles (preventing scattering) while maintaining enough viscosity after ejection to prevent droplet spreading. This parameter control enables fine pattern formation using fine droplet coating apparatus without droplet scattering issues.
5Reliability
If the curing reaction progresses in the nozzle to improve curability, then curability is improved, but nozzle clogging occurs
Solution Approach 1:
The patent incorporates a curing reaction inhibitor in the composition that preliminarily prevents the curing reaction from progressing during storage and handling. This preliminary action keeps the composition in a liquid state with appropriate viscosity (10-1000 cP) for smooth ejection from nozzles, preventing nozzle clogging due to premature curing, while still allowing complete curing to occur after application when the inhibitor is no longer effective.
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
Enables precision application and fine pattern formation with excellent curability, handling workability, and high cold resistance across a wide temperature range, preventing nozzle clogging and maintaining reliability of electronic components.
Implementation Method 1
single-liquid curable organopolysiloxane compositions which cure using a hydrosilylation reaction
Implementation Method 2
the viscosity at a strain speed of 1,000 (1/s) is 2.0 Pa s or less, while the viscosity at a strain speed of 0.1 (1/s) is a value of 50.0-fold or more the viscosity at a strain speed 1,000 (1/s)
Data Source
Figure 1~3
AI summary
[Problem] To provide a curable organopolysiloxane composition having rheological properties suitable for precision application and fine pattern formation by a fine droplet coating apparatus such as a jet dispenser, along with a method for forming a pattern using the same. [Resolution Means] The present invention is suitably: a curable organopolysiloxane composition, which is hydrosilylation reaction curable and precisely applied by a jet dispenser, etc., wherein the viscosity at a strain speed of 1,000 (1/s) is 2.0 Pa s or less, while the viscosity at a strain speed of 0.1 (1/s) is a value 50.0-fold or more the viscosity at a strain speed of 1,000 (1/s), and wherein the content of silicon atom-bonded aromatic functional groups in the composition is within a range of 1.0 to 6.0 mass%; a method for forming a pattern using the same; and an electronic component using the same, etc.