Solvent-Free UV-Curable Silicone Composition With Low Viscosity Adhesion
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Solution Overview
Problem
Existing ultraviolet light curable compositions containing organopolysiloxanes face challenges with high viscosity, limiting their application by injection molding or inkjet methods, and poor adhesion to substrates, necessitating compositions with adjustable mechanical properties and improved workability.
Innovation Solution
A solvent-free ultraviolet light curable composition comprising components (A) 1 to 99 parts by mass of a compound with (meth)acryloxy and hydroxyl groups, (B) 1 to 99 parts by mass of an organopolysiloxane with alkenyl groups, and (C) 0 to 80 parts by mass of a compound with (meth)acryloxy groups, allowing for low viscosity and excellent adhesion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional ultraviolet light curable compositions containing organopolysiloxane are used, then high heat resistance and chemical stability are achieved, but high viscosity results which limits application methods
Solution Approach 1:
The patent uses a composite composition combining organopolysiloxane (providing heat resistance and chemical stability) with acrylate or methacrylate compounds (containing UV-curable functional groups). This composite approach allows the material to maintain the desirable properties of organopolysiloxane while achieving low viscosity and UV curability through the acrylate/methacrylate component
Solution Approach 2:
The patent modifies the chemical composition parameters by incorporating acrylate or methacrylate compounds with specific functional groups into the organopolysiloxane system. This parameter change transforms the material from high viscosity to low viscosity while maintaining the core performance characteristics of organopolysiloxane
2Ease of operation
If high silicone component content is used to achieve low viscosity, then workability is improved, but adhesion to substrate deteriorates
Solution Approach 1:
The patent optimizes the composition parameters by controlling the ratio of organopolysiloxane to acrylate/methacrylate compounds, and by selecting specific acrylate or methacrylate compounds with appropriate molecular weights and functional groups. This parameter optimization achieves the balance between low viscosity (good workability) and sufficient adhesion strength
Solution Approach 2:
The patent introduces compounds with specific functional groups (acryloxy or methacryloxy groups) that provide localized adhesion properties. These functional groups create strong bonding sites at the interface with the substrate, ensuring good adhesion even when the bulk composition has low viscosity for easy application
3Object-affected harmful factors
If composition is made solvent-free to improve environmental properties, then health and environmental impact is reduced, but viscosity increases making application difficult
Solution Approach 1:
The patent changes the chemical structure parameters of the base components, selecting organopolysiloxane and acrylate/methacrylate compounds that inherently possess low viscosity. This structural parameter change allows the formulation to remain low viscosity without requiring volatile organic solvents, thus achieving both environmental friendliness and ease of application
Solution Approach 2:
The patent creates a solvent-free composite system where organopolysiloxane and acrylate/methacrylate compounds are compatible and form a homogeneous low-viscosity mixture. The composite nature of this system allows both components to contribute to the low viscosity property, eliminating the need for solvents while maintaining good workability
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 achieves low viscosity, enabling easy application and adjustment of mechanical properties, with enhanced adhesion to substrates, suitable for use in insulating materials and coatings for electronic devices.
Implementation Method 1
an ultraviolet light curable composition which is curable by actinic rays, such as ultraviolet rays or electron beam
Data Source
AI summary
Provided is an ultraviolet-curable composition containing silicon atoms, wherein the composition has a high ability to adjust the mechanical properties of the cured product thereof, and has excellent workability and high adhesion to a substrate even for solvent-free application. This disclosure provides an ultraviolet-light curable composition and a use thereof. The composition contains: (A) 1-99 parts by mass of a compound having at least one (meth)acryloxy group and hydroxyl group in one molecule and having no silicon atom; (B) 1-99 parts by mass of an organopolysiloxane having at least two alkenyl groups in one molecule and having no ultra-violet-curable functional group; and (C) 0-80 parts by mass of a compound having at least one (meth)acryloxy group in the molecule and having no hydroxyl group, on the basis of 100 parts by mass of the total mass of the composition, and contains substantially no organic solvent in the composition.