Silazane-Siloxane Copolymers for LED Encapsulation
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Solution Overview
Problem
Current polysilazane/polysiloxane copolymers used in LED encapsulation face challenges in balancing mechanical properties with thermal and light stability, prone to crack formation and limited compatibility with additives, necessitating improved polymers for enhanced performance and scalability in LED applications.
Innovation Solution
A silazane-siloxane random copolymer is developed by reacting an organosilane with two halogen end groups and an organosiloxane, along with an amine, to create a polymer with specific monomer units in random sequence, which improves thermal and light stability while reducing crack formation and enhancing compatibility with additives.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If polysilazane/polysiloxane copolymers are used for LED encapsulation, then thermal and light stability is improved, but crack formation increases and mechanical properties deteriorate
Solution Approach 1:
The patent modifies the chemical composition parameters of the copolymer by controlling the molar ratio of polysilazane to polysiloxane units and selecting specific organosilane and organosiloxane structures. This parameter optimization achieves a balance where thermal and light stability are maintained while mechanical properties and crack resistance are improved
Solution Approach 2:
The invention creates a composite polymer system combining polysilazane and polysiloxane units in a copolymer structure. This composite approach allows the material to exhibit both the thermal and light stability of polysilazane and the flexibility and crack resistance of polysiloxane, resolving the contradiction between stability and mechanical properties
2Stability of the object's composition
If polysilazane/polysiloxane copolymers are used for LED encapsulation, then thermal and light stability is improved, but compatibility with additives is limited
Solution Approach 1:
The patent adjusts the chemical structure parameters of the copolymer by selecting different organosilane and organosiloxane components with varying side groups (R1, R2, R3). These parameter changes modify the polymer's polarity, flexibility, and interaction characteristics, thereby improving compatibility with various additives while preserving thermal and light stability
3Ease of manufacture
If conventional encapsulation polymers are used, then ease of manufacture is maintained, but resistance to high temperature and radiation is insufficient
Solution Approach 1:
The patent changes the chemical composition parameters from conventional polymers to organosilane/organosiloxane-based copolymers. This parameter change introduces elements with high thermal and radiation resistance while maintaining a manufacturing process that is adaptable to existing industrial capabilities
Solution Approach 2:
The invention employs a composite polymer system combining the beneficial properties of polysilazane (high temperature and radiation resistance) and polysiloxane (flexibility and processability). This composite material achieves enhanced reliability while remaining compatible with conventional manufacturing approaches
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 silazane-siloxane random copolymer exhibits excellent temperature resistance and longevity, outperforming conventional materials like phenylsilicone and organopolysilazanes, with improved mechanical properties and compatibility, suitable for industrial-scale production and use in LEDs.
Implementation Method 1
reacting an organosilane, an amine and an organosiloxane, wherein the organosilane comprises two halogen end groups
Data Source
AI summary
The present invention relates to silazane-siloxane random copolymers as well as their production and their uses, particularly in LEDs.