Resin Lens Curable Composition Preventing Crystallization
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Solution Overview
Problem
The challenge is to develop a curable composition that maintains high quality and uniformity of resin lenses even after long-term storage, as crystallization issues during storage lead to poor external appearance and reduced productivity in optical members.
Innovation Solution
A curable composition comprising a compound represented by General Formula A, a compound represented by General Formula B, and a polymerization initiator, with a specific ratio of General Formula B to General Formula A, which inhibits crystallization, ensuring high-quality cured substances and lenses even after long-term storage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a polyfunctional monomer having a diphenylfluorene skeleton with a fused aryl structure is used in a curable composition, then the Abbe number and refractive index are improved, but the monomer crystallizes after long-term storage causing poor external appearance
Solution Approach 1:
The patent modifies the molecular structure of the polyfunctional monomer by changing the fused ring structure from a fully aromatic system to one containing a saturated ring (cycloalkyl group). This structural parameter change prevents crystallization while maintaining the desired optical properties (Abbe number and refractive index) of the cured resin lens.
Solution Approach 2:
The patent creates a composite monomer structure combining diphenylfluorene skeleton with cycloalkyl groups and (meth)acryloyloxy functionalities. This composite structure achieves a balance between optical performance and storage stability by integrating different functional moieties that collectively prevent crystallization while maintaining high Abbe number and refractive index.
2Reliability
If glass materials are used for optical members, then optical characteristics and environmental resistance are improved, but weight reduction and miniaturization become difficult
Solution Approach 1:
The patent replaces traditional glass materials with a cured resin composition containing specifically structured polyfunctional monomers. This substitution maintains optical characteristics and environmental resistance while enabling weight reduction and miniaturization of optical members such as lenses.
Solution Approach 2:
The patent changes the material parameter from inorganic glass to organic resin with specific molecular structure (diphenylfluorene-based monomers). This material parameter change achieves comparable optical properties with reduced density, enabling lighter and smaller optical components.
3Volume of moving object
If the size of optical member is reduced for miniaturization, then the imaging module size is reduced, but chromatic aberrations occur
Solution Approach 1:
The patent changes the optical parameters of the lens material by using diphenylfluorene-based monomers with specific structural features (Ar11, Ar12, Ar13 groups). These structural parameters control the Abbe number and refractive index, enabling chromatic aberration correction in miniaturized optical members while maintaining small size.
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 effectively prevents crystallization, allowing for the production of high-quality, high-yield cured substances and lenses with improved external appearance and productivity, even after extended storage periods.
Implementation Method 1
A curable composition comprising a compound represented by General Formula A, a compound represented by General Formula B, and a polymerization initiator
Data Source
AI summary
A lens having high quality even after long-term storage can be manufactured using a curable composition containing a compound represented by General Formula A, a compound represented by General Formula B, and a polymerization initiator, in which a ratio of a substance amount of the compound represented by General Formula B to a substance amount of the compound represented by General Formula A is 1 to 25 mol %.In the Formulas, each portion surrounded by a broken line of Ar11, Ar12, and Ar13 represents that each of the portions may form a fused ring; L1 and L2 each represent a single bond, —O—, or the like; Sp1 and Sp2 each represent a single bond or a divalent linking group; Pol1 and Pol2 each represent a polymerizable group; R3 to R6 each represent a substituent; and q, r, v, and w are each an integer of 0 to 4.