Rubber-Metal Adhesion Layer Without Cobalt Salts or Solvents
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Solution Overview
Problem
Existing rubber-metal adhesion methods face challenges in achieving strong adhesion between rubber and metal members while minimizing environmental impact, such as the need for cobalt salts and sulfur in direct vulcanization and the use of organic solvents in indirect vulcanization.
Innovation Solution
A rubber-metal composite body is created using an adhesion layer containing a polyolefin-based resin with polar functional groups and a diene-olefin-based copolymer, where the rubber member contacts the copolymer and the metal member contacts the polar resin, enhancing adhesion through hydrogen bonding and compatibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a direct vulcanization adhesion method is used with cobalt salt and sulfur, then adhesion strength is improved, but environmental burden increases and processability deteriorates
Solution Approach 1:
The invention changes the chemical composition parameters of the adhesion layer by using acid-modified polyolefin resin instead of cobalt salt and sulfur, thereby maintaining adhesion strength while reducing environmental burden and improving processability
Solution Approach 2:
The invention uses a composite adhesion layer comprising acid-modified polyolefin resin and specific copolymer materials to achieve strong adhesion without harmful substances, replacing the traditional cobalt-sulfur system
2Strength
If sulfur is used as a vulcanization system, then adhesion is achieved, but processability and heat deterioration resistance worsen
Solution Approach 1:
The invention changes the vulcanization system from sulfur-based to an organic solvent-free system using acid-modified polyolefin resin, which eliminates the negative effects on processability and heat deterioration resistance while maintaining adhesion
3Strength
If organic solvent is used in indirect vulcanization adhesion method, then adhesion is achieved, but environmental burden increases
Solution Approach 1:
The invention extracts and eliminates organic solvents from the adhesion system by using acid-modified polyolefin resin that provides adhesion functionality without requiring harmful solvent carriers
Solution Approach 2:
The invention changes the adhesion mechanism from solvent-based to a system based on acid-modified polyolefin resin that achieves adhesion through chemical modification rather than solvent mediation
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
This configuration allows for strong, durable adhesion between rubber and metal members, reducing the need for cobalt salts and sulfur, and eliminating organic solvents, resulting in high-strength rubber-metal composite bodies suitable for tires and other rubber articles.
Implementation Method 1
the polyolefin-based resin having a polar functional group is an acid-modified polyolefin-based resin
Data Source
AI summary
Provided is a rubber-metal composite body in which a rubber member and a metal member are firmly adhered to each other. The rubber-metal composite body is a rubber-metal composite body in which a rubber member and a metal member are adhered to each other via an adhesion layer, where the adhesion layer contains a polyolefin-based resin having a polar functional group, and a copolymer having a conjugated diene unit and a non-conjugated olefin unit but having no butylene unit, and the rubber member is in contact with at least the copolymer, and the metal member is in contact with at least the resin having a polar functional group.