Adhesive agent composition
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Solution Overview
Problem
Existing adhesive compositions for rubber-fiber composites, such as those used in belts and tires, lack sufficient abrasion resistance after heat aging, which is critical for applications like automobile components that require high heat resistance and durability.
Innovation Solution
An adhesive composition comprising a latex of highly saturated nitrile rubber with specific monomer units, including 10-55 wt% α,β-ethylenically unsaturated nitrile monomer, 25-89 wt% conjugated diene monomer, and 1-20 wt% α,β-ethylenically unsaturated dicarboxylic acid monoester monomer, combined with a crosslinking aid having 2 or more ethylenically unsaturated groups, such as maleimides, to enhance bonding strength and resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If solvent-based rubber paste is used for treating base cloth, then adhesive strength between rubber and base cloth is improved, but environmental pollution by organic solvents occurs
Solution Approach 1:
The invention changes the fundamental parameter of the adhesive medium from solvent-based to water-based. The adhesive composition uses water as the continuous phase instead of organic solvents, eliminating harmful emissions while maintaining effective adhesion through the latex and crosslinking agent system
Solution Approach 2:
The invention replaces the chemical mechanism of solvent-based adhesion with a water-based latex crosslinking system. The adhesive composition relies on latex particles and crosslinking reactions rather than organic solvent evaporation and rubber paste formation, substituting one chemical system with a more environmentally friendly alternative
2Reliability
If conventional adhesive compositions are used, then basic adhesive function is achieved, but abrasion resistance after heat aging is insufficient
Solution Approach 1:
The invention creates a composite adhesive system combining latex (polymer matrix), crosslinking agent (network former), and filler (reinforcement). This composite structure provides both adhesive bonding and enhanced mechanical properties including abrasion resistance after heat aging, overcoming the limitations of conventional single-component adhesives
Solution Approach 2:
The invention changes the chemical composition parameters by incorporating specific crosslinking agents and fillers in optimized ratios. The crosslinking degree, polymer composition, and filler content are adjusted to achieve superior thermal stability and abrasion resistance while maintaining adhesive strength
3Temperature
If highly saturated nitrile rubber is used for heat resistance, then oil and heat resistance are improved, but adhesive performance after heat aging deteriorates
Solution Approach 1:
The invention introduces crosslinking agents as intermediaries that mediate between the highly saturated nitrile rubber and the base cloth. These crosslinking agents form a bridging network that maintains adhesive performance under heat aging conditions, preventing the deterioration that would otherwise occur with highly saturated nitrile rubber alone
Solution Approach 2:
The invention creates a composite system where highly saturated nitrile rubber latex is combined with crosslinking agents and fillers. This composite approach preserves the oil and heat resistance of the nitrile rubber while the crosslinking network and filler particles maintain adhesive performance after heat aging
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 proposed adhesive composition forms a hardened adhesive layer with superior abrasion resistance properties after heat aging, improving the mechanical strength and durability of rubber-fiber composites, making them suitable for high-performance applications like automotive belts and tires.
Implementation Method 1
an adhesive composition including: latex of a highly saturated nitrile rubber (A)... and a crosslinking aid (B)... forms a hardened adhesive layer
Data Source
AI summary
Disclosed is an adhesive composition comprising: a latex of a highly saturated nitrile rubber (A), which comprises 10 to 55 wt% of an α,β-ethylenically unsaturated nitrile monomer unit, 25 to 89 wt% of a conjugated diene monomer unit and 1 to 20 wt% of an α,β-ethylenically unsaturated dicarboxylic acid monoester monomer unit and has an iodine value of 120 or less, and a crosslinking aid (B) which has 2 or more ethylenically unsaturated groups in a molecule.