Optical Lens Curable Composition for Low-Temperature Haze Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing plastic lenses have lower refractive indices and are prone to haze due to impurities from adhesive tapes during polymerization, which affects their optical clarity and performance.
Innovation Solution
A curable composition containing a low-temperature polymerization initiator and specific styrene compounds, along with fluorene group-containing compounds, is used to suppress impurity incorporation and enhance refractive index while reducing specific gravity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If polymerization is performed at high temperature to ensure complete curing, then curing completeness is improved, but impurity incorporation from adhesive tapes increases causing haze
Solution Approach 1:
The patent changes the temperature parameter by using a low-temperature polymerization initiator with a one-minute half-life temperature of 60°C or lower, enabling polymerization to proceed effectively at lower temperatures (e.g., 50-70°C) rather than high temperatures. This parameter change allows complete curing while minimizing impurity incorporation from adhesive tapes, thereby preventing haze formation in the cured product
Solution Approach 2:
The patent introduces a specific low-temperature polymerization initiator as an intermediary substance that mediates the polymerization process. This initiator enables the reaction to occur at lower temperatures where adhesive tape impurities are less likely to dissolve into the curable composition, thus acting as a mediator between the need for complete curing and the need to prevent haze
2Object-affected harmful factors
If polymerization is performed at low temperature to prevent impurity dissolution, then haze is reduced, but curing completeness may be compromised
Solution Approach 1:
The patent modifies the chemical parameter of the polymerization initiator by selecting compounds with one-minute half-life temperatures of 60°C or lower (such as certain peroxides and azo compounds). This parameter change ensures that the initiator remains active at low temperatures, enabling complete polymerization curing without compromising reliability, while simultaneously preventing impurity dissolution that causes haze
3Productivity
If conventional polymerization initiators are used, then polymerization speed is maintained, but impurity incorporation increases due to higher temperatures
Solution Approach 1:
The patent changes the temperature parameter by using initiators with one-minute half-life temperatures of 60°C or lower, which enables the polymerization to proceed at lower temperatures. This parameter change maintains adequate polymerization speed through proper initiator selection and concentration control, while significantly reducing impurity incorporation from adhesive tapes that occurs at higher temperatures
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 produces a haze-resistant cured product with a high refractive index and low specific gravity, suitable for optical articles like lenses, by early polymerization at lower temperatures to minimize impurity mixing.
Implementation Method 1
a curable composition including: a low-temperature polymerization initiator having a one-minute half-life temperature of lower than 100°C; and at least one styrene compound
Data Source
Figure 1~2
AI summary
The purpose of the present invention is to provide: a curable composition which enables the achievement of a cured body that is not likely to be clouded; a cured body of this curable composition; and an optical article, a lens, and eye glasses which each comprise this cured body. One embodiment of the present invention provides a curable composition. The curable composition contains: a low-temperature polymerization initiator that has a one-minute half-life temperature of less than 100° C; and at least one styrene compound that is selected from the group consisting of styrene and styrene derivatives. It is preferable that the curable composition additionally contains a high-temperature polymerization initiator that has a one-minute half-life temperature of 100°C or higher.