Siloxane Light Diffuser Composition for Cost-Effective Optical Devices
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Solution Overview
Problem
Existing diffusive articles for optical device applications, such as light diffusers and lighting devices, face challenges in minimizing costs while maintaining performance properties, as high filler loadings and surface texturing introduce additional processing steps and impact other performance properties.
Innovation Solution
A composition comprising an aryl component with organopolysiloxanes and organohydrogenpolysiloxanes, a methyl component with similar structures, and a hydrosilylation catalyst, which forms a cured product that diffuses transmitted light effectively when applied to a substrate and cured.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If high filler loadings (e.g., titanium oxide) are used to minimize costs, then cost is reduced, but additional processing steps are introduced and other performance properties are impacted
Solution Approach 1:
The patent extracts the light-diffusing function from traditional filler-based approaches and implements it through the intrinsic properties of the siloxane polymer structure itself. The composition uses specific organopolysiloxane structures with pendant groups that provide optical diffusion without requiring high loadings of titanium oxide or other fillers, thereby eliminating additional processing steps while maintaining performance properties.
Solution Approach 2:
The patent changes the fundamental parameter of light diffusion from being filler-dependent to being polymer-structure-dependent. By modifying the siloxane polymer structure (using specific formulas with pendant groups and controlled molecular architecture), the composition achieves light diffusion through the matrix itself rather than through dispersed fillers, reducing both cost and processing complexity.
2Reliability
If surface texturing is applied to diffusely transmit light, then light diffusion is achieved, but additional processing steps are introduced and other performance properties are impacted
Solution Approach 1:
The patent extracts the light-diffusing function from surface texturing and implements it through the bulk optical properties of the siloxane composition. The specific polymer structure with pendant groups creates inherent light diffusion throughout the material volume, eliminating the need for surface texturing processing steps while maintaining effective light diffusion and preserving other performance properties.
Solution Approach 2:
The patent changes the location and mechanism of light diffusion from surface-level texturing to bulk-material optical properties. By controlling the molecular structure and pendant groups of the siloxane polymer, the composition achieves uniform light diffusion throughout the article thickness without requiring additional surface treatment steps.
3Reliability
If traditional compositions are used, then manufacturing is simpler, but light diffusion performance is insufficient
Solution Approach 1:
The patent creates a composite-like structure within the siloxane polymer itself, combining different functional groups (pendant groups, crosslinkable groups, backbone structure) into a single integrated material system. This internal composite architecture provides both the desired light diffusion performance and maintains manufacturing simplicity, as the composition cures as a unified material without requiring separate filler addition or surface treatment steps.
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 cost-effective solution for forming articles with excellent light diffusion properties, suitable for various applications including light diffusers and lighting devices, without the need for additional processing steps, thereby enhancing performance and reducing costs.
Implementation Method 1
The composition comprises (I) an aryl component, comprising (A) an organopolysiloxane... (B) an organohydrogenpolysiloxane... (III) a hydrosilylation catalyst
Implementation Method 2
the cured product exhibits diffusion of transmitted light when exposed to light
Data Source
AI summary
A composition is disclosed, which comprises (I) an aryl component; (II) a methyl component; and (III) a hydrosilylation catalyst. The (I) aryl component comprises (A) an organopolysiloxane and (B) an organohydrogenpolysiloxane. Similarly, the (II) methyl component comprises (A) an organopolysiloxane and (B) an organohydrogenpolysiloxane. A method of preparing the composition is also disclosed. Further, a method of preparing an article, e.g. a light diffuser, and a lighting device comprising the light diffuser are disclosed. Finally, a method of diffusely transmitting light with the light diffuser is disclosed.