Fluoropolymer Lens Composition for High UV Transparency

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Solution Overview

Problem

Existing fluorine-containing polymers do not adequately address the need for high ultraviolet-light permeability, and methods for producing such polymers often require complex steps to remove polymerization initiators and their decomposed products.

Innovation Solution

A composition comprising a fluorine-containing polymer with specific structural units and a controlled amount of polymerization initiator or its decomposed product, produced through a polymerization and filtration process without the need for additional removal steps, ensuring high ultraviolet-light permeability.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If a fluorine-containing polymer is produced using conventional methods, then the polymer can be obtained, but additional steps are required to remove the polymerization initiator and decomposed products

Engineering Contradiction:

Improveproduction process simplicityVSAvoidnumber of production steps

Core Design Contradiction:

Ease of manufactureVSDevice complexity

Solution Approach 1:

The patent extracts and removes the harmful components (polymerization initiator and decomposed products) through a filtration step, separating them from the fluorine-containing polymer to achieve high ultraviolet light permeability without requiring complex additional removal steps

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent controls the amount of decomposed product to be 0.1 to 100 ppm by mass based on the mass of the composition, using parameter control to achieve the desired ultraviolet light permeability while simplifying the production process

Inventive Principle:

Principle #35Parameter changes

2Productivity

If the polymerization initiator and decomposed products are not removed, then the production process is simplified, but the ultraviolet light permeability is reduced

Engineering Contradiction:

Improveproduction efficiencyVSAvoidultraviolet light permeability

Core Design Contradiction:

ProductivityVSObject-affected harmful factors

Solution Approach 1:

The patent converts the potentially harmful presence of decomposed products into a benefit by precisely controlling their amount to be 0.1 to 100 ppm by mass, transforming them from harmful impurities to acceptable components that do not significantly affect ultraviolet light permeability

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

Solution Approach 2:

The patent changes the parameter of decomposed product concentration to a specific range (0.1 to 100 ppm by mass), which optimizes the balance between production simplicity and ultraviolet light permeability

Inventive Principle:

Principle #35Parameter changes

3Ease of manufacture

If fluorine-containing polymer contains carbonyl groups at terminal position, then the polymerization process is easier, but the polymer yellows and ultraviolet light permeability decreases

Engineering Contradiction:

Improvepolymerization easeVSAvoidyellowing and ultraviolet light permeability

Core Design Contradiction:

Ease of manufactureVSObject-affected harmful factors

Solution Approach 1:

The patent changes the chemical structure parameter by ensuring the fluorine-containing polymer does not contain a carbonyl group at the terminal position, which prevents yellowing and maintains high ultraviolet light permeability while still achieving easy polymerization

Inventive Principle:

Principle #35Parameter changes

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 method enables the production of fluorine-containing polymers with enhanced ultraviolet-light permeability, suitable for use in ultraviolet-light-emitting elements, by simplifying the production process and maintaining high transparency.

Implementation Method 1

a fluorine-containing polymer (A), and at least one compound (BC) selected from the group consisting of a polymerization initiator (B) and a decomposed product (C) of the polymerization initiator (B)

Methodology Applied

Scientific EffectPolymerization: Photopolymerisation

Data Source

PatentUS20260071013A1Composition containing fluorine-containing polymer, method for producing fluorine-containing polymer, and ultraviolet light-emitting element lens containing fluorine-containing polymer

Publication Date: 2026.03.12 DAIKIN INDUSTRIES LTD

AI summary

An object of the present disclosure is to provide a composition comprising a fluorine-containing polymer with high ultraviolet-light permeability, a method for producing a fluorine-containing polymer with high ultraviolet-light permeability, a lens for ultraviolet-light-emitting elements comprising a fluorine-containing polymer with high ultraviolet-light permeability, and the like. Specifically, provided is a composition comprising a fluorine-containing polymer (A), and at least one compound (BC) selected from the group consisting of a polymerization initiator (B) and a decomposed product (C) of the polymerization initiator (B), wherein the compound (BC) is contained in an amount of 0.1 to 100 ppm by mass based on the mass of the composition, and the fluorine-containing polymer (A) comprises as a main component a structural unit represented by formula (A):wherein R1 to R4 each independently represent a fluorine atom, a C1-C5 perfluoroalkyl group, or a C1-C5 perfluoroalkoxy group.