Cyclic Compound Optical Material Composition for Lens Manufacturing
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Solution Overview
Problem
The production of plastic lenses for spectacles often faces defects such as peeling marks and mold release failures, which reduce yield and are particularly problematic in negative and positive lenses with higher power, respectively, leading to unusable lenses.
Innovation Solution
A cyclic compound represented by Formula (1) is incorporated into an optical material composition with an episulfide compound, along with additional components like polythiol and polyisocyanate, to stabilize production conditions and prevent viscosity variation, thereby reducing peeling defects and mold release failures during polymerization/curing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If good peeling is achieved during mold release, then peeling marks are reduced, but mold release failure increases due to poor releasability
Solution Approach 1:
The patent applies parameter changes by modifying the chemical composition parameters of the optical material. Specifically, it uses a composition containing a cyclic compound (Formula 1) with specific structural parameters (ring size, functional groups) and controls the content ratios of various components (episulfide compound, polythiol, polyisocyanate, inorganic sulfur) to achieve both good peeling and reliable mold release. This chemical parameter optimization resolves the contradiction between peeling quality and releasability.
Solution Approach 2:
The patent employs composite materials by combining multiple components in a specific formulation: cyclic compound (Formula 1), episulfide compound, polythiol, polyisocyanate, and inorganic sulfur. This composite optical material composition synergistically achieves both good peeling performance and reliable mold release, resolving the contradiction through the combined properties of different materials rather than single-material optimization.
2Reliability
If good releasability is achieved during mold release, then mold release failure is reduced, but peeling marks increase due to poor peeling
Solution Approach 1:
The patent applies parameter changes by optimizing the chemical composition parameters to achieve both good peeling and reliable mold release. The specific structural parameters of the cyclic compound (Formula 1) and the controlled content ratios of all components work together to simultaneously improve peeling quality and releasability, resolving the contradiction where improving one parameter would worsen the other.
Solution Approach 2:
The patent uses composite materials with specific component interactions to achieve synergistic effects. The combination of cyclic compound, episulfide compound, polythiol, polyisocyanate, and inorganic sulfur creates a material system where the sum of properties exceeds individual components, enabling simultaneous achievement of good peeling and reliable mold release that cannot be obtained by single-material optimization.
3Stability of the object's composition
If viscosity variation is not stabilized during storage, then production conditions become unstable, but adding compounds to stabilize viscosity may affect optical properties
Solution Approach 1:
The patent applies parameter changes by selecting specific chemical compounds with particular molecular weights and structural parameters to stabilize viscosity without compromising optical properties. The cyclic compound (Formula 1) and other components are chosen with specific parameter ranges that provide viscosity stabilization while maintaining transparency and other optical characteristics, resolving the contradiction between stability and optical quality.
Solution Approach 2:
The patent applies local quality by ensuring that different components serve specific functions: the cyclic compound primarily provides viscosity stabilization, while other components (episulfide compound, polythiol, polyisocyanate, inorganic sulfur) maintain optical properties. This functional differentiation allows each component to optimize its local role without compromising overall performance, resolving the contradiction between viscosity stability and optical property consistency.
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 solution allows for the industrially efficient production of optical materials with improved heat resistance and light resistance, reducing peeling defects and mold release failures, thus enhancing the productivity and quality of plastic lenses.
Implementation Method 1
a polymerization catalyst at 0.0001% by mass to 10% by mass with respect to the total amount of the composition for optical material; and polymerizing/curing the resultant
Data Source
AI summary
One embodiment of the present invention can provide an optical material composition that includes a cyclic compound that is represented by formula (1) and an episulfide that is represented by formula (2). Another embodiment of the present invention can provide an optical material production method that includes a step wherein, with respect to the total amount of the optical material composition, 0.0001-10 mass% of a polymerization catalyst is added to the optical material composition and the optical material composition is polymerization cured. (In formula (2), m is an integer from 0 to 4, and n is an integer from 0 to 2.)