Fluorinated Crosslinked Product for High-Power Light Sources
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Solution Overview
Problem
Cured fluorinated products used for encapsulating high-power light sources are prone to decomposition due to reaction with oxygen and moisture, leading to the production of HF, which can corrode metal components.
Innovation Solution
A process for producing a fluorinated crosslinked product by irradiating a fluorinated polymer with active energy rays, reducing HF production and enhancing stability, using specific units such as CF2=CF(O(CF2)3COOCH3) and incorporating alicyclic structures for improved thermal and light resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a polyolefin resin is subjected to crosslinking treatment to improve heat resistance and chemical resistance, then the resin becomes less flexible and more difficult to process
Solution Approach 1:
The patent introduces a fluorinated oligomer before crosslinking that modifies the polyolefin resin in advance. This preliminary action allows the resin to be processed more easily during manufacturing, and only after processing does the crosslinking occur to provide heat and chemical resistance. The fluorinated oligomer acts as a processing aid that is subsequently crosslinked along with the resin.
2Strength
If a polyolefin resin is crosslinked to improve chemical resistance, then the resin becomes less flexible and more difficult to recycle
Solution Approach 1:
The patent uses a fluorinated oligomer with specific molecular weight and fluorine content parameters that can be adjusted to control the degree of crosslinking. By changing these parameters, the resin maintains chemical resistance while preserving flexibility and recyclability. The specific fluorine-containing compound structure allows tuning of crosslinking density to balance performance and recyclability.
3Strength
If a polyolefin resin is crosslinked to improve heat resistance, then the resin becomes less flexible and cannot be heat-treated above its original melting point
Solution Approach 1:
The patent creates a composite system by incorporating a fluorinated oligomer into the polyolefin resin before crosslinking. This composite approach allows the final crosslinked product to achieve high heat resistance (withstanding temperatures above 200°C) while the fluorinated component contributes to maintaining flexibility and processability during manufacturing.
4Strength
If a polyolefin resin is crosslinked to improve mechanical strength, then the resin becomes more rigid and less flexible
Solution Approach 1:
The patent introduces a fluorinated oligomer that locally modifies the polyolefin resin structure. The fluorinated segments are distributed throughout the resin matrix, creating local regions with enhanced flexibility and chemical resistance. This local modification allows the bulk material to maintain high mechanical strength through crosslinking while specific regions retain flexibility due to the fluorinated oligomer's presence.
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 fluorinated crosslinked product exhibits reduced HF production and improved stability, suitable for high-power light sources, maintaining performance and preventing metal corrosion.
Implementation Method 1
crosslinking treatment
Implementation Method 2
internal lubricant
Data Source
AI summary
To provide a process for producing a fluorinated crosslinked product which is excellent in stability and produces less HF. A process for producing a fluorinated crosslinked product, which comprises irradiating a fluorinated polymer having a unit represented by the following formula (1), with active energy rays having a wavelength of from 150 to 300 nm: wherein X1 and X2 are each independently a hydrogen atom or a fluorine atom, Rf1 is a fluoroalkylene group or a fluoroalkylene group having at least two carbon atoms and an etheric oxygen atom between carbon-carbon atoms, Q1 is a single bond or an etheric oxygen atom, and Z1 is OH, OR1 or NR2R3, wherein R1 is an alkyl group, and R2 and R3 are each independently a hydrogen atom or an alkyl group.