Dual-Sealed Container for Stable Addition-Curing Liquid Silicone
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Solution Overview
Problem
Existing containers for addition-curable liquid silicone compositions fail to prevent oxygen and water ingress, leading to insufficient storage stability and limited distribution of aerobic cure type compositions.
Innovation Solution
A container design with a first sealing structure and a second sealing structure, using a film to cover the inlet, and a member to consume and remove oxygen and water, ensuring the composition remains stable in low oxygen and humidity conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If prior art containers are used for storing addition-curable liquid silicone composition, then the container structure is simple, but the storage stability of the composition is insufficient due to oxygen and water ingress
Solution Approach 1:
The container is divided into multiple sealing structures: a first sealing structure (cap and bottle combination) and a second sealing structure (seal bag). This segmentation allows each part to perform specific sealing functions, with the seal bag providing an additional barrier against oxygen and water ingress, thereby improving storage stability without creating a single complex integrated structure.
Solution Approach 2:
The seal bag (second sealing structure) is placed inside the container formed by the cap and bottle (first sealing structure). This nested arrangement creates multiple layers of protection, where the inner seal bag provides an additional barrier against oxygen and water, significantly improving storage stability while maintaining a relatively simple overall container structure.
2Reliability
If the container uses multiple sealing structures and oxygen/water removing members, then the storage stability is improved, but the device complexity increases
Solution Approach 1:
An oxygen and water removing member (such as a desiccant or oxygen absorber) is placed inside the seal bag. This member automatically performs the function of removing oxygen and water from the sealed environment without requiring external intervention or complex mechanical systems, thereby improving storage stability while keeping the structure relatively simple.
Solution Approach 2:
The seal bag creates a sealed environment that, combined with the oxygen and water removing member, establishes an inert-like atmosphere protective of the composition. This chemical approach to protection avoids the need for complex physical barriers or active sealing mechanisms, improving storage stability with minimal structural complexity.
3Reliability
If the container provides complete oxygen and water barrier, then the storage stability is improved, but the manufacturing precision requirements increase
Solution Approach 1:
The seal bag is pre-sealed to create a protective barrier before the composition is exposed to potentially harmful environments during storage and handling. The oxygen and water removing member is also pre-positioned inside the seal bag. This beforehand preparation ensures protection without requiring extremely precise sealing operations during final assembly, as the critical sealing has already been performed under controlled conditions.
Solution Approach 2:
The seal bag acts as an intermediary barrier between the composition and the external environment. By placing the composition inside this intermediate sealed layer, the system achieves complete oxygen and water barrier protection without requiring the outer container structures to provide perfect sealing, thereby reducing manufacturing precision requirements for the main container assembly.
4Ease of operation
If the composition is stored in aerobic conditions, then the storage period is shortened, but the ease of operation is improved
Solution Approach 1:
The seal bag and oxygen/water removing member are pre-installed in the container before the composition is used. This preliminary preparation ensures that the composition is protected from oxygen and water during storage and transportation, extending the storage period. When needed, the user simply opens the seal bag, providing both extended shelf life and ease of use without requiring complex preservation systems.
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 container design enhances storage stability and flexibility in transporting addition-curable liquid silicone compositions, allowing them to cure upon contact with air, aligning with energy-saving and sustainable development goals.
Implementation Method 1
comprising an aerobic platinum catalyst mixture which is activated as a hydrosilation addition reaction catalyst upon contact with airborne water (moisture) and/or oxygen
Implementation Method 2
the composition being curable into a silicone rubber cured product (silicone elastomer) or silicone gel cured product through hydrosilation addition reaction
Implementation Method 3
the space or gap between the first and second sealing structures is provided with a function of removing oxygen and water
Data Source
Figure 1A~2
Figure 3A~4
AI summary
This container stores an addition-curing liquid silicone composition that contains a platinum catalyst that is activated by contact with the atmosphere, but is inactive in an atmosphere having a humidity of 5% RH or less and an oxygen concentration of 0.1 volume% or less. In the presence of this platinum catalyst that has undergone activation in the atmosphere, the addition-curing liquid silicone composition undergoes crosslinking and curing by a hydrosilylation addition reaction. The container has this addition-curing liquid silicone composition sealed (filled) thereinto, and the container comprises: a first sealing structure having a sealing part provided by sealing an inlet opening through which the addition-curing liquid silicone composition is introduced; a second sealing structure, that is a film that covers at least the entire sealing part of the first sealing structure or covers the entire first sealing structure, to further seal the sealing part; and a member having the ability to consume and remove the oxygen and moisture incidentally present between the first sealing structure and the second sealing structure. The storability of an aerobically curable addition-curing liquid silicone composition can thereby be improved.