Optical Lens Resin Composition Balancing Refractive Index and Moldability
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Solution Overview
Problem
Conventional thermoplastic resins lack properties suitable for optical applications and moldability, making them unsuitable for producing high-quality molded products.
Innovation Solution
A thermoplastic resin comprising silane, fluorene, and dinaphthalene constituent units, with specific molecular structures and compositions, which are polymerized using a metal acetate catalyst to enhance properties such as refractive index and moldability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional thermoplastic resins are used, then general manufacturing is possible, but optical properties (refractive index, Abbe number) and moldability are insufficient
Solution Approach 1:
The patent uses composite materials by combining silane constituent units (providing optical properties with refractive index 1.67-1.75 and Abbe number 15-25) with fluorene and dinaphthalene constituent units (providing moldability and processability). This composite approach resolves the contradiction by integrating materials with complementary properties to achieve both excellent optical performance and ease of molding.
2Reliability
If thermoplastic resins with excellent optical properties are developed, then optical performance improves, but moldability and processability deteriorate
Solution Approach 1:
The patent applies local quality by assigning specific functional roles to different constituent units within the polymer structure. The silane units are positioned to provide optical properties, while fluorene and dinaphthalene units are positioned to provide moldability. This localized functional distribution allows the material to simultaneously achieve excellent optical performance and ease of molding without compromise.
3Manufacturing precision
If existing thermoplastic resins are used for optical applications, then production is possible, but manufacturing precision and product quality are insufficient
Solution Approach 1:
The patent applies parameter changes by precisely controlling the composition ratios of different constituent units (silane, fluorene, dinaphthalene) to achieve optimal properties. By adjusting these parameters, the resin achieves excellent manufacturing precision for optical applications while maintaining manageable composition complexity through systematic formulation.
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 resulting resin and molded bodies, such as optical lenses, exhibit improved refractive index, Abbe number, and moldability, with reduced low molecular weight components, enhancing optical performance and production efficiency.
Implementation Method 1
a silane constituent unit (S), which is a constituent unit derived from at least any silane compound
Implementation Method 2
a fluorene constituent unit (F), which is a constituent unit derived from a fluorene ring-containing dihydroxy compound; and a dinaphthalene constituent unit (N), which is a constituent unit derived from a dinaphthalene-containing dihydroxy compound
Data Source
AI summary
The present invention addresses the problem of providing: a thermoplastic resin which has excellent properties, moldability and the like in optical applications; and a molded article containing such a thermoplastic resin. The solution of the problem may include a thermoplastic resin containing: a silane constituent unit (S) which is a constituent unit derived from at least one silane compound selected from among a predetermined dialkoxysilane compound, a diaryloxysilane compound, and a monoalkoxymonoaryloxysilane compound; a fluorene constituent unit (F) which is a constituent unit derived from a fluorene ring-containing dihydroxy compound; and a dinaphthalene constituent unit (N) which is a constituent unit derived from a dinaphthalene-containing dihydroxy compound.