Adhesive Sheet Material for Crosslinked Rubber Aging Prevention
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Solution Overview
Problem
Conventional coating- or solvent-type compositions for aging prevention of crosslinked rubber face issues such as running on vertical surfaces, surface damage, environmental contamination, unsuitability for enclosed spaces, and short-lasting effects due to thin coatings, especially when exposed to wind and rain.
Innovation Solution
An adhesive material comprising 100 parts by mass of a polymer ingredient (such as rubber, thermoplastic elastomer, or resin) and 5 to 50 parts by mass of an antidegradant, which allows the antidegradant to migrate to crosslinked rubber, providing enhanced aging resistance without solvents, suitable for vertical surfaces, enclosed spaces, and outdoor use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a coating- or solvent-type composition for aging prevention is applied to the surface of crosslinked rubber, then the aging resistance of the rubber can be improved, but the composition runs down on vertical surfaces and cannot be uniformly applied
Solution Approach 1:
The invention changes the physical state parameter of the aging prevention composition from liquid (coating/solvent type) to solid (adhesive sheet type). This parameter change eliminates the running down issue on vertical surfaces while maintaining the aging prevention function through antidegradant migration from the sheet to the rubber surface.
Solution Approach 2:
The invention replaces the mechanical application process (brushing, spraying, or rolling liquid composition) with a diffusion-based process where antidegradant molecules migrate from the adhesive sheet to the rubber surface. This substitution eliminates the need for manual application efforts and ensures uniform distribution without running down.
2Reliability
If a coating- or solvent-type composition for aging prevention is used, then the rubber surface can be protected from aging, but the solvent may cause damage to the surface or discoloration of the rubber product
Solution Approach 1:
The invention extracts and removes the solvent component from the aging prevention composition, retaining only the essential antidegradant functional ingredients in an adhesive sheet form. This extraction eliminates the harmful effects of solvents on rubber surface and color while preserving the protective aging prevention function.
3Reliability
If a coating- or solvent-type composition for aging prevention is applied, then the rubber can be protected from aging, but environmental contamination may occur and it is not suitable for use in enclosed spaces
Solution Approach 1:
The invention removes the solvent carrier from the composition, transforming it into a solvent-free adhesive sheet system. This extraction eliminates volatile organic compound emissions and environmental contamination concerns, making the aging prevention method suitable for use in enclosed spaces and environmentally sensitive applications.
4Reliability
If a coating- or solvent-type composition is applied to form a protective film, then the rubber surface can be protected, but the coating thickness is relatively small and the effect lasts only for a short period of time
Solution Approach 1:
The invention incorporates a high concentration of antidegradant ingredients (5-50 parts by mass per 100 parts by mass of polymer) into the adhesive sheet in advance. This preliminary concentration allows sustained migration of antidegradant to the rubber surface over extended periods, providing long-lasting protection that exceeds the limitations of conventional thin coating films.
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 adhesive material effectively restores aging resistance of crosslinked rubber, prevents surface damage, and maintains effectiveness under wind and rain, with adjustable thickness for long-term protection.
Implementation Method 1
an adhesive material for aging prevention comprising: 100 parts by mass of at least one polymer ingredient selected from the group consisting of a rubber, a thermoplastic elastomer and a resin; 5 to 50 parts by mass of an antidegradant... the antidegradant is allowed to migrate to crosslinked rubber
Data Source
AI summary
An adhesive material for aging prevention which can eliminate problems of conventional compositions for aging prevention and can prevent a crosslinked rubber from aging; and a method of preventing a crosslinked rubber from aging. The adhesive material for aging prevention comprises 100 parts by mass of at least one polymer ingredient selected from the group consisting of rubbers, thermoplastic elastomers, and resins and 5-50 parts by mass of an antidegradant. The method of preventing crosslinked-rubber aging comprises applying an adhesive material for aging prevention comprising at least one polymer ingredient selected from the group consisting of rubbers, thermoplastic elastomers, and resins and an antidegradant to a crosslinked rubber to allow the antidegradant to migrate to the crosslinked rubber and thereby prevent the crosslinked rubber from aging.