Ionic Silicone Curable Compositions with Reactive Functional Groups
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Solution Overview
Problem
Existing curable compositions of silicone ionomers lack reactive functional groups such as silicon-hydride and vinyl within the polymer chain, limiting their curability and versatility in applications.
Innovation Solution
Incorporation of reactive functional groups like silicon-hydride and vinyl into the ionic silicone chain, enabling addition curing and forming elastomers with enhanced properties, including tensile strength, hardness, and customizable tack, suitable for various applications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If ionic groups are incorporated into silicone polymer chain, then antimicrobial capabilities and moisture permeability are improved, but curability is limited due to lack of reactive functional groups
Solution Approach 1:
The patent merges ionic groups (sulfonate, carboxylate) with reactive functional groups (vinyl, silicon-hydride) within the same polymer chain to create ionic silicones that possess both antimicrobial properties and curability. This combination resolves the contradiction by integrating multiple functions into a single material system.
Solution Approach 2:
The invention creates composite polymer structures where ionic moieties and reactive functional groups coexist in the polymer chain. These composite ionic silicones combine the beneficial properties of ionic groups (antimicrobial, moisture permeability) with the curability of reactive functional groups, enabling versatile applications.
2Strength
If reactive functional groups are added to ionic silicone chain, then curability and physical properties are improved, but device complexity increases
Solution Approach 1:
The patent introduces reactive functional groups at specific locations within the polymer chain rather than uniformly throughout. The ionic silicones contain vinyl or silicon-hydride groups at controlled densities (0.01 to 2 per polymer chain), allowing curability while maintaining manageable complexity through localized functional group placement.
3Adaptability or versatility
If multiple functional groups are incorporated into polymer chain, then application versatility is improved, but manufacturing complexity increases
Solution Approach 1:
The patent segments the polymer chain into distinct functional regions: ionic groups (sulfonate or carboxylate) for antimicrobial properties, reactive groups (vinyl or silicon-hydride) for curability, and siloxane backbone for structural integrity. This segmentation allows each functional group to perform its specific role while simplifying the overall manufacturing process through modular design.
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 curable ionic silicone compositions exhibit improved physical properties and antimicrobial capabilities, suitable for diverse applications including personal care, healthcare, and industrial uses, with controlled release of active ingredients and increased moisture permeability.
Implementation Method 1
at least one functional group that can undergo addition or dehydrogenative condensation cure
Implementation Method 2
The presence of ionic groups imparts differentiating properties to the elastomer compositions thereby making them useful in applications such as healthcare
Implementation Method 3
Moisture vapor transport rate (MVTR) of silicone gel containing an ionic silicone with sulfonate groups
Data Source
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AI summary
A curable composition of ionic silicones includes a silicone having the formula M1 a M2 b M3 cD1 d D2 e D3 f T1 g T2 h T3 i Qj having ionic groups and crosslinking functional groups. The composition can further include polyorganosiloxane having the average compositional formula R26 nR27 0(OH)pSiO(4-n-o-p)/2, organohydrogenoligosiloxane or organohydrogenpolysiloxane that has the average compositional formula HqR28 rSiO(4-q-r)/2 a transition metal catalystand other components such as UV stabilizer, cure accelerator, pigment, dye, antimicrobial agent, biocide, surfactant, functional or non¬ functional filler, conductive filler, finely divided surface treated/untreated metal oxides, clay, plasticizers, tackifiers, mold release agents, adhesion promoters, compatibilizers, pharmaceutical excipients, surfactants or antistatic agents.