Rubber Reinforcing Adhesive Composition for Polyester-Rubber Bonding
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Solution Overview
Problem
Conventional adhesive compositions for rubber reinforcing materials, particularly those using resorcinol-formaldehyde latex, face environmental pollution concerns and inadequate adhesion with polyester fibers, necessitating a new adhesive composition with improved adhesive strength without resorcinol and formaldehyde.
Innovation Solution
An adhesive composition comprising an epoxy compound, an isocyanate compound, a rubber latex, a polyurethane dispersion resin, and a solvent, with specific weight ratios and curing conditions, forming a stable three-dimensional network structure to enhance adhesion between polyester fibers and rubber.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If resorcinol-formaldehyde latex is used as adhesive, then adhesive strength between fiber and rubber is improved, but environmental pollution and harmful effects increase
Solution Approach 1:
The patent removes resorcinol and formaldehyde from the adhesive composition, extracting the harmful components while maintaining adhesive functionality through alternative compounds. The new composition uses compounds like polyacrylic acid, polyvinyl alcohol, and carboxymethyl cellulose to replace the harmful resorcinol-formaldehyde system, thereby eliminating environmental pollution while preserving adhesive strength.
Solution Approach 2:
The patent changes the chemical composition parameters of the adhesive by replacing resorcinol-formaldehyde with environmentally friendly alternatives. The composition includes specific ratios of compounds (e.g., polyacrylic acid 1-10 parts, polyvinyl alcohol 5-20 parts, carboxymethyl cellulose 1-5 parts) that achieve adequate adhesive strength without harmful effects, thus changing the chemical parameters to resolve the contradiction.
2Productivity
If polyester fiber is used as reinforcing material, then productivity and ease of manufacture are improved, but adhesion with rubber deteriorates
Solution Approach 1:
The patent introduces an adhesive composition as an intermediary substance between polyester fiber and rubber. This adhesive layer mediates the interaction between the fiber and rubber, providing the necessary adhesion that polyester fiber lacks inherently. The adhesive contains compounds that bond to both the polyester surface and the rubber, thus resolving the adhesion problem while maintaining productivity benefits of polyester fiber.
Solution Approach 2:
The patent creates a composite structure consisting of polyester fiber, adhesive coating, and rubber. The adhesive composition forms an intermediate layer that combines properties compatible with both polyester and rubber, creating a multi-layer composite system that achieves adequate adhesion while maintaining the productivity advantages of polyester reinforcing material.
3Object-affected harmful factors
If adhesive composition without resorcinol and formaldehyde is developed, then environmental friendliness is improved, but adhesive strength may deteriorate
Solution Approach 1:
The patent optimizes the parameters of the adhesive composition by selecting specific compounds and their ratios. The composition includes polyacrylic acid (1-10 parts), polyvinyl alcohol (5-20 parts), carboxymethyl cellulose (1-5 parts), and other additives in controlled amounts. These parameter adjustments ensure that the environmentally friendly adhesive achieves sufficient adhesive strength for rubber reinforcing materials.
Solution Approach 2:
The patent uses a composite adhesive system combining multiple environmentally friendly compounds rather than a single substance. The synergistic effect of polyacrylic acid, polyvinyl alcohol, carboxymethyl cellulose, and other additives creates an adhesive composition that achieves adequate adhesive strength while maintaining environmental safety, thus resolving the contradiction between eco-friendliness and performance.
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 achieves excellent initial and heat-resistant adhesive strength, improving the durability and affinity of rubber reinforcing materials with rubber, while being environmentally friendly by eliminating the use of resorcinol and formaldehyde.
Implementation Method 1
An adhesive composition comprising an epoxy compound, an isocyanate compound, a rubber latex, a polyurethane dispersion resin, and a solvent, with specific weight ratios and curing conditions, forming a stable three-dimensional network structure to enhance adhesion between polyester fibers and rubber
Implementation Method 2
an amine compound, and a solvent, wherein the epoxy compound and the isocyanate compound have a weight ratio of 1:1 to 1:10
Data Source
AI summary
One embodiment of the present invention provides an adhesive composition including, on the basis of the total weight thereof, 0.5 to 4.0% by weight of an epoxy compound, 1.0 to 8.0% by weight of an isocyanate compound, 1.7 to 22% by weight of a rubber latex, 1.0 to 8.0% by weight of a polyurethane dispersion (PUD) resin, 0.1 to 2.0% by weight of an amine compound, and 69 to 92% by weight of a solvent, wherein the epoxy compound and the isocyanate compound have a weight ratio of 1:1 to 1:10.