Polyorganosiloxane Release Coating for Low Force and High Adhesion
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing silicone release coatings face challenges in achieving ultra-low release force while maintaining good adhesion strength and preventing migration.
Innovation Solution
A curable polyorganosiloxane release coating composition comprising a branched aliphatically unsaturated polyorganosiloxane, a crosslinker with at least 3 silicon-bonded hydrogen atoms, a hydrosilylation reaction catalyst, a hydrosilylation reaction inhibitor, and an aryl-functional polydiorganosiloxane, which is applied and cured via hydrosilylation reaction to form a release liner with low release force and high adhesion strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If a release coating composition is formulated to have desirable ultra-low release force, then the release force is reduced, but the coating may suffer from migration
Solution Approach 1:
The patent uses a composite coating system combining polydiorganosiloxane and polyorganosiloxane components with specific functional groups. This composite structure allows the coating to achieve ultra-low release force while maintaining compositional stability and preventing migration through the synergistic interaction of different polymer components and crosslinking mechanisms
Solution Approach 2:
The patent modifies the chemical parameters of the release coating by controlling the alkenyl group content (0.05-5.0 mmol/100g) and using specific crosslinking agents. These parameter changes enable the coating to achieve desirable release force characteristics while maintaining stability and preventing migration through optimized molecular structure
2Force
If the release coating is designed for low release force, then release force is reduced, but adhesion strength may be compromised
Solution Approach 1:
The patent applies local quality by creating different functional zones within the coating structure. The polydiorganosiloxane component provides the release surface with low adhesion properties, while the polyorganosiloxane component with SiH groups provides structural integrity and strong substrate bonding. This local differentiation allows simultaneous achievement of low release force and high adhesion strength
Solution Approach 2:
The composite coating system combines materials with complementary properties: polydiorganosiloxane for release functionality and polyorganosiloxane for structural support and adhesion. This composite approach enables the coating to exhibit both low release force and high adhesion strength by leveraging the strengths of each component
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 composition provides a release liner with low release force and sustained adhesion strength, suitable for applications such as touch panels and pressure-sensitive adhesives, while minimizing migration issues.
Implementation Method 1
cured via hydrosilylation reaction to prepare a release liner
Data Source
Figure 1
AI summary
Provided is a curable polyorganosiloxane release coating composition comprising: A) a branched aliphatically unsaturated polyorganosiloxane, B) a crosslinker having at least 3 silicon bonded hydrogen atoms per molecule, C) a hydrosilylation reaction catalyst, D) a hydrosilylation reaction inhibitor, and E) an aryl-functional polydiorganosiloxane having a content of aliphatically unsaturated groups. Also provided are a release liner(100) with this coating(101) and the preparation method thereof.