Free-Radically Polymerizable Isobutylene Copolymer for 5G
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Solution Overview
Problem
Polyisobutylene, despite its excellent properties for 5G telecommunications devices, is a gum and requires crosslinking to be useful, but existing methods do not effectively achieve the necessary crosslinking for adhesive and film applications.
Innovation Solution
Development of free-radically polymerizable isobutylene copolymers functionalized with pendant (meth)acrylate groups, which form crosslinked polymer networks through free-radical polymerization, suitable for use in 5G applications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If polyisobutylene is used for 5G applications, then low dielectric constant and moisture resistance are achieved, but the material is a gum and requires crosslinking to be useful
Solution Approach 1:
The patent introduces pendant (meth)acrylate groups during the polymerization process itself, rather than crosslinking after material formation. This preliminary functionalization allows the material to achieve crosslinking capability inherently, eliminating the need for separate crosslinking steps while maintaining the low dielectric constant and moisture resistance properties of polyisobutylene.
Solution Approach 2:
The patent modifies the chemical structure of polyisobutylene by introducing functional groups that enable crosslinking. By changing the chemical parameters of the polymer (adding (meth)acrylate functionality), the material transitions from a non-crosslinking gum to a crosslinkable polymer, achieving both ease of manufacture and reliable performance.
2Ease of operation
If crosslinking is performed on polyisobutylene, then usability in adhesive and film applications is achieved, but existing methods do not effectively achieve the necessary crosslinking
Solution Approach 1:
The patent uses a specific initiator system (such as AIBN or other free-radical initiators) that effectively promotes crosslinking of the (meth)acrylate groups in polyisobutylene. This intermediary substance enables reliable crosslinking formation, achieving both ease of operation and reliable crosslinking effectiveness that existing methods failed to achieve.
Solution Approach 2:
The patent creates a composite structure within the polymer by incorporating multiple functional groups (isobutylene units for low dielectric constant and (meth)acrylate groups for crosslinking). This composite molecular structure enables the material to be easily processed while achieving reliable crosslinking, resolving the contradiction between ease of operation and crosslinking effectiveness.
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 crosslinked polymer networks provide improved properties for 5G applications, including low dielectric constant and moisture resistance, suitable for use in telecommunications devices.
Implementation Method 1
free-radically polymerizable copolymer comprising divalent monomeric units... After free-radical polymerization they form crosslinked polymer networks
Data Source
AI summary
A free-radically polymerizable copolymer comprising divalent monomeric units: a); b); and optionally c). Each R1 independently represents an alkyl group having from 1 to 8 carbon atoms. R2 represents H or a methyl group. Z represents an alkylene group having 2 to 12 carbon atoms. X− represents a non-interfering anion. Free-radically polymerizable compositions containing the same are also disclosed as well as the corresponding polymerized compositions.