UV-Blocking Release Coating Composition With Silicone Compatibility
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Solution Overview
Problem
Existing release films used to protect pressure-sensitive adhesives during transportation and storage fail to maintain adhesive properties due to exposure to ultraviolet rays, leading to compatibility issues with silicon-based compounds and solvents.
Innovation Solution
A coating composition comprising a silicone resin as a release agent, a solvent with a boiling point between 79°C to 115°C, and an ultraviolet absorber, which ensures compatibility and prevents ultraviolet degradation, using a specific solvent mixture and ultraviolet absorber compound to form a release layer that blocks ultraviolet rays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If an ultraviolet absorber is added to a coating liquid containing a silicon-based compound, then ultraviolet protection is improved, but compatibility between the ultraviolet absorber and silicon-based compound deteriorates
Solution Approach 1:
The patent introduces a specific solvent as an intermediary substance that mediates between the ultraviolet absorber and silicon-based compound. The solvent has a boiling point of 79°C to 115°C and specific solubility parameters that enable it to dissolve both the ultraviolet absorber and silicon-based compound simultaneously, preventing precipitation and compatibility issues while maintaining ultraviolet protection functionality.
Solution Approach 2:
The patent changes the physical and chemical parameters of the coating liquid by selecting a solvent with specific boiling point (79°C to 115°C) and solubility characteristics. This parameter optimization enables the simultaneous dissolution of ultraviolet absorbers with different chemical structures (such as benzotriazole and triazine types) and silicon-based compounds, resolving the compatibility contradiction.
2Reliability
If a release film is used to protect pressure-sensitive adhesive during transportation, then adhesive protection is improved, but the release film itself becomes exposed to ultraviolet rays causing curing and loss of release properties
Solution Approach 1:
The patent converts the harmful ultraviolet rays into a beneficial protective function by incorporating ultraviolet absorbers into the release film coating. The absorbers capture ultraviolet energy and dissipate it harmlessly, transforming the harmful environmental factor into a protective mechanism that shields the pressure-sensitive adhesive while the release film maintains its release properties.
Solution Approach 2:
The patent creates a composite coating material consisting of silicon-based compounds (providing release properties), ultraviolet absorbers (providing UV protection), and a specifically selected solvent (ensuring compatibility). This composite formulation allows the release film to simultaneously provide both protection to the adhesive and self-protection against ultraviolet degradation.
3Strength
If the pressure-sensitive adhesive is cured by ultraviolet irradiation during transportation, then adhesive strength is improved, but the adhesive property is lost before attachment to adherend
Solution Approach 1:
The patent applies preliminary anti-action by incorporating ultraviolet absorbers into the release film coating before the adhesive is exposed to ultraviolet rays during transportation. This pre-established protective layer prevents premature curing of the adhesive by blocking ultraviolet radiation, thereby maintaining the adhesive's operational properties until the intended attachment process occurs.
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 coating composition effectively protects pressure-sensitive adhesives from ultraviolet degradation, maintaining adhesive properties and ensuring compatibility with silicon-based compounds, thereby enhancing the performance of release films.
Implementation Method 1
an ultraviolet absorber, which ensures compatibility and prevents ultraviolet degradation, using a specific solvent mixture and ultraviolet absorber compound to form a release layer that blocks ultraviolet rays
Implementation Method 2
a solvent with a boiling point between 79°C to 115°C
Data Source
AI summary
A coating composition is provided. The coating composition of the present application has excellent compatibility between the components. In addition, there is an advantage that the release layer formed from the coating composition of the present application has low transmittance for light having a wavelength of 380 nm or more.