Epoxy Polysulfide Sealant Sheet for Precise Thickness Control
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Solution Overview
Problem
Existing technologies struggle to efficiently apply polysulfide-based sealants, as they are difficult to apply and require precise application, and they suffer from issues such as increased manufacturing costs, decreased productivity and degraded sealing quality, arising from difficulties in training and securing workers.
Innovation Solution
A polysulfide-based sealant sheet is formed as a sheet, comprising an epoxy group-containing polysulfide having a disulfide structure and an epoxy group in the molecule, wherein the epoxy group-containing polysulfide is a reaction product of an epoxy compound having two or more epoxy groups in one molecule and a thiol group-containing polysulfide having a disulfide structure and a thiol group in one molecule, and wherein the epoxy compound is a combination of a bifunctional epoxy compound and a polyfunctional epoxy compound.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If liquid polysulfide sealant is applied in liquid form, then the sealant can be easily applied to the target object, but it is difficult to achieve precise application of desired thickness in desired area
Solution Approach 1:
The patent changes the physical state parameter of the sealant from liquid to sheet form. This transformation allows the sealant to maintain ease of application while achieving precise thickness control, as the sheet form inherently provides uniform thickness without requiring skilled application techniques.
Solution Approach 2:
The sealant is prepared in sheet form before application, with the desired thickness already established during manufacturing. This preliminary action eliminates the need for precise application skills during installation, as the thickness precision is achieved in advance during sheet production.
2Reliability
If liquid sealant is applied by skilled workers, then application quality can be maintained, but manufacturing costs increase and productivity decreases due to training and securing workers
Solution Approach 1:
The sheet form sealant is self-adhesive and can be applied without requiring skilled workers. The material itself provides the necessary adhesion and positioning capabilities, eliminating the need for specialized training and reducing dependence on human expertise for maintaining sealing quality.
Solution Approach 2:
Changing from liquid to sheet form transforms the application process from one requiring skilled manual operation to a simple placement process. This parameter change in physical state directly addresses both reliability and productivity by enabling unskilled workers to achieve consistent sealing quality.
3Area of stationary object
If liquid sealant is applied, then the sealant can cover the target object, but it is difficult to control the coating thickness
Solution Approach 1:
The patent changes the physical state from liquid to sheet, which fundamentally alters how thickness is controlled. In sheet form, thickness is a manufacturing parameter determined during sheet production rather than an application parameter, enabling precise thickness control while maintaining full coverage area.
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 sealant sheet allows for precise application and improved sealing quality, reducing manufacturing costs and increasing productivity by providing a cured sealant with excellent oil resistance and controlled thickness, while maintaining a suitable balance between adhesion and retention stability.
Implementation Method 1
when allowed to cure, it can form a rubbery cured material having excellent resistance to oil such as jet fuel and hydraulic oil
Implementation Method 2
As the curing agent, strong oxidizing agents such as dichromic acid are often used as they can allow the curing reaction to readily proceed at room temperature
Implementation Method 3
the epoxy group-containing polysulfide is a reaction product of an epoxy compound having two or more epoxy groups in one molecule and a thiol group-containing polysulfide having a disulfide structure and a thiol group in one molecule
Data Source
Figure 1~2
AI summary
Provided is a sealant sheet formed as a sheet. The sealant sheet comprises an epoxy group-containing polysulfide. The epoxy group-containing polysulfide has a disulfide structure and an epoxy group in its molecule.