Rubber Bonding Adhesive Composition for Durable Dynamic Adhesion
Solution Overview
Problem
Existing adhesive compositions for bonding vulcanized rubber components are complex, require multiple components, and do not ensure a durable connection under dynamic stress, while also exposing rubber components to excessive chemical and thermal stress.
Innovation Solution
A simple adhesive composition comprising diene rubber, organic solvent, filler, hydrocarbon resin/polyolefin, activator, and sulfur vulcanization system, which is easy to apply and handle, and forms a permanent bond without excessive stress on the rubber components, using a method that involves mixing the components, applying the adhesive, and vulcanizing in an autoclave.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If existing adhesive compositions are used to bond vulcanized rubber components, then bonding can be achieved, but the composition is complex and requires multiple components
Solution Approach 1:
The patent combines multiple adhesive components (polymer, solvent, filler, crosslinking agent, and catalyst) into a single integrated adhesive composition. This merging eliminates the need for separate component storage and application steps, simplifying the overall system while maintaining reliable bonding performance through the synergistic interaction of all components within one formulation.
2Ease of operation
If existing adhesive compositions are used, then bonding can be achieved, but they require multiple components that need separate preparation, storage, and application
Solution Approach 1:
The patent merges all necessary adhesive components into a single ready-to-use composition, eliminating the need for separate preparation and storage of multiple components. This single-component system allows direct application to the rubber components, significantly improving ease of operation while reducing the complexity associated with managing multiple separate substances.
3Reliability
If existing adhesive compositions are used, then bonding can be achieved, but they expose rubber components to excessive chemical and thermal stress
Solution Approach 1:
The patent modifies the chemical parameters of the adhesive system by selecting specific components with appropriate reactivity and compatibility for vulcanized rubber. The catalyst system and crosslinking agents are chosen to operate under milder conditions, reducing chemical stress on the rubber components while still achieving reliable bond strength through controlled crosslinking reactions.
Solution Approach 2:
The patent introduces a catalyst as an intermediary that enables the crosslinking reaction to proceed under milder conditions. This catalyst mediates between the adhesive components and the rubber substrate, facilitating bond formation without requiring excessive thermal or chemical stress that would damage the vulcanized rubber components.
4Reliability
If existing adhesive compositions are used, then bonding can be achieved, but adhesion of rubber components to each other is insufficient under dynamic stress
Solution Approach 1:
The patent creates a composite adhesive system combining polymer, filler, crosslinking agent, and catalyst in specific proportions. This composite formulation enhances adhesion strength by creating a multi-phase material that can better accommodate dynamic stresses, with the filler providing structural reinforcement and the crosslinked network providing elastic recovery under stress conditions.
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 composition provides a strong, durable, and long-lasting bond under dynamic stress, maintaining the physical and chemical properties of the rubber components, with improved adhesion and compatibility with vulcanized rubber components like vehicle tires.
Implementation Method 1
the solvent evaporates, and the resulting composition is very similar to the composition of a rubber mixture
Implementation Method 2
at least one sulfur vulcanization system
Data Source
AI summary
The invention relates to an adhesive composition, a method for permanently bonding a first vulcanized rubber component to a second vulcanized rubber component, and a composite comprising a first vulcanized rubber component and a second vulcanized rubber component. The adhesive composition contains at least the following components: a) 3 to 20 wt.% of at least one diene rubber; b) 70 to 94 wt.% of at least one organic solvent; c) 1 to 7 wt.% of at least one filler; d) 0.1 to 2 wt.% of at least one hydrocarbon resin and/or polyolefin; e) 0.2 to 1.5 wt.% of at least one activator, preferably a combination of zinc oxide and at least one fatty acid, in particular stearic acid; and f) at least one sulfur vulcanization system.In the inventive method, the first and the second vulcanized rubber components are permanently bonded together by means of the adhesive composition according to the invention, thereby forming the composite according to the invention.