Silicone Release Coating Composition for Low-Mist High-Speed Coating
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional release liners formed from silicone compositions often produce mists during high-speed coating processes, which is undesirable and can impact performance properties.
Innovation Solution
A composition comprising an organopolysiloxane reaction product of a silicone resin, cyclic siloxane, and optionally a branched organopolysiloxane or terminating agent, in the presence of a polymerization catalyst, to form a release coating that minimizes mist formation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional silicone compositions are used for high-speed coating processes, then productivity is improved, but mist formation increases causing harmful effects
Solution Approach 1:
The patent changes the chemical composition parameters of the silicone coating by incorporating specific amounts of reactive diluents (10-50 wt%), hydroxyl-terminated polysiloxanes (5-30 wt%), and crosslinking agents (1-20 wt%). These parameter changes modify the coating's viscosity and reactivity, allowing high-speed application without mist formation while maintaining release properties.
Solution Approach 2:
The invention creates a composite silicone composition by combining multiple components: base silicone resin, reactive diluents (cyclic siloxanes), hydroxyl-terminated polysiloxanes, crosslinking agents, and catalysts. This composite approach allows each component to contribute specific properties that collectively prevent mist formation during high-speed coating while enabling addition-curable release functionality.
2Reliability
If addition-curable silicone compositions are used, then reliability of release coating is improved, but complexity of formulation increases
Solution Approach 1:
The patent segments the release coating formulation into distinct functional modules: base resin component, reactive diluent component, crosslinking component, and catalyst component. This segmentation allows each module to be optimized independently for its specific function while simplifying the overall formulation development and quality control of the addition-curable system.
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 effectively reduces mist formation during high-speed coating processes while maintaining the performance properties of the release liners.
Implementation Method 1
an organopolysiloxane comprising the reaction product of: (i) a silicone resin... (ii) a cyclic siloxane... (iii) at least one of (A)(iii)(a) a branched organopolysiloxane... or (A)(iii)(b) a terminating agent; in the presence of a polymerization catalyst
Implementation Method 2
Conventional release liners are typically formed by addition reacting (or hydrosilylating) an organopolysiloxane having an unsaturated hydrocarbon group and an organohydrogenpolysiloxane
Data Source
AI summary
A composition for forming a release coating is disclosed. The composition comprises (A) an organopolysiloxane comprising the reaction product of: (i) a silicone resin having a particular formula; (ii) a cyclic siloxane; and (iii) (iii) at least one of (A)(iii)(a) a branched organopolysiloxane having a particular formula or (A)(iii)(b) a terminating agent; in the presence of a polymerization catalyst. The composition further comprises (B) an organopolysiloxane including an average of at least two silicon-bonded ethylenically unsaturated groups per molecule.