Oxygen-Curable Silicone Composition Room Temperature Curing
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Solution Overview
Problem
Current silicone rubber curing compositions require heating or UV irradiation, which are energy-intensive and limit their application in energy-saving manufacturing processes, while also lacking in mechanical characteristics.
Innovation Solution
An oxygen-curable silicone composition comprising an organopolysiloxane with reactive double bonds, an organoborane complex, and a compound with Si-OH groups, which allows polymerization to proceed at room temperature without heating or UV irradiation, using atmospheric oxygen as a trigger.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If heating is used for curing silicone rubber, then curability is improved, but energy consumption increases and manufacturing complexity increases
Solution Approach 1:
The invention changes the curing mechanism from thermal activation to oxygen-triggered radical polymerization. By incorporating specific organoborane complexes and compounds with Si-OH groups, the system enables curing at room temperature through atmospheric oxygen, eliminating the need for heating while maintaining reliable curability
Solution Approach 2:
The invention replaces the thermal field (heating system) with a chemical field (oxygen-triggered polymerization). The organoborane complex acts as a sensitive initiator that reacts with atmospheric oxygen to generate radicals, substituting the mechanical/thermal curing process with a chemical initiation process that occurs at ambient conditions
2Reliability
If UV irradiation is used for curing silicone rubber, then curability at normal temperature is improved, but manufacturing complexity increases due to UV equipment requirements
Solution Approach 1:
The invention enables the composition to self-cure by utilizing atmospheric oxygen as the trigger. The organoborane complex in the formulation naturally reacts with oxygen in the air to initiate polymerization, eliminating the need for external UV irradiation equipment while achieving complete curing at normal temperature
Solution Approach 2:
The invention changes the activation parameter from UV light exposure to oxygen concentration. By designing the organoborane complex to be oxygen-sensitive, the system transforms the curing trigger from an external energy source (UV) to an ambient chemical component (oxygen), simplifying the manufacturing process
3Reliability
If addition-curable compositions are used, then curability is improved, but heating is required which increases energy consumption
Solution Approach 1:
The invention introduces atmospheric oxygen as an intermediary substance that triggers the curing reaction. The organoborane complex serves as a mediator that converts oxygen into active radicals, enabling the curing process to proceed at room temperature without requiring heating energy
Solution Approach 2:
The invention utilizes oxygen as a strong oxidant that reacts with the organoborane complex to accelerate the polymerization process. This oxidation-based initiation mechanism allows curing to occur rapidly at ambient temperature, replacing the need for thermal activation
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
Enables curing at room temperature without the need for heating or UV irradiation, saving time and energy, and producing a suitable adhesive with improved mechanical characteristics.
Implementation Method 1
a composition, which contains a specific organopolysiloxane having a reactive double bond such as acryloyloxyalkyl group, a specific organoborane complex, and a compound having Si-OH group, can allow a polymerization reaction to proceed while being triggered by atmospheric oxygen
Implementation Method 2
can allow a polymerization reaction to proceed while being triggered by atmospheric oxygen, and can provide a cured product at room temperature without heating or UV irradiation for usage
Implementation Method 3
a compound having Si-OH group
Data Source
AI summary
Disclosed is an oxygen-curable silicone composition that includes: (A) an organopolysiloxane having the formula (1): (R1 each represents an alkyl group having 1 to 10 carbon atoms, acryloyloxyalkyl group and so forth, and has per molecule at least one polymerizable double bond group such as acryloyloxyalkyl group; R2 each represents an oxygen atom, alkylene group having 1 to 10 carbon atoms, or arylene group having 6 to 10 carbon atoms; and, m and n represents numbers that satisfy 1 ≤ m + n ≤ 1,000); (B) an organoborane complex having the formula (2): (R3 each represents a monovalent hydrocarbon group having 1 to 10 carbon atoms; R4 and R5 each represents a hydrocarbon group having 1 to 10 carbon atoms, and, R4 and R5 may bond to form a divalent linking group); and (C) a compound having Si-OH group.