Green environmentally friendly adhesive dipping liquid and method for production thereof
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Solution Overview
Problem
Existing adhesive systems for rubber and fiber materials, such as the resorcinol-formaldehyde-latex (RLF) system, contain harmful substances and are costly, complex, and pose environmental and safety challenges, while alternatives like acrylic resin-latex systems require high equipment investment and are dependent on specific suppliers.
Innovation Solution
An environment-friendly impregnation solution composed of blocked isocyanate, special amino resin, rubber latex, and auxiliaries, without formaldehyde or resorcinol, is formulated in a one-bath process, ensuring safety and simplicity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional adhesive dipping liquids containing organic solvents are used, then adhesive strength and coating uniformity are improved, but environmental pollution and health hazards increase
Solution Approach 1:
The patent changes the fundamental parameter of the solvent system from organic solvents to water, transforming the chemical composition while maintaining adhesive performance. This substitution eliminates harmful organic emissions and health hazards while preserving the essential coating function through optimized water-based formulation and crosslinking mechanisms
Solution Approach 2:
The patent employs a composite adhesive system combining polyvinyl butyral resin with crosslinking agents (silane-based or isocyanate-based), creating a multi-component formulation that achieves both environmental friendliness and high adhesive strength through synergistic interactions between components
2Object-affected harmful factors
If water-based adhesive dipping liquids are used to reduce environmental impact, then environmental friendliness is improved, but adhesive strength and coating quality deteriorate
Solution Approach 1:
The patent modifies the chemical parameters of the water-based adhesive by incorporating crosslinking agents that create three-dimensional network structures, transforming the physical and chemical properties to achieve adhesive strength comparable to or exceeding conventional organic-based systems
Solution Approach 2:
The patent utilizes silane-based crosslinking agents that undergo condensation reactions to form strong covalent bonds, creating a highly crosslinked network structure that significantly enhances adhesive strength, water resistance, and overall coating performance in the water-based system
3Manufacturing precision
If organic solvents are used in adhesive dipping liquids, then coating uniformity and adhesive performance are improved, but production safety and worker health deteriorate
Solution Approach 1:
The patent changes the solvent parameter from organic to water-based, eliminating flammability hazards and toxic exposure risks while maintaining coating uniformity through controlled water evaporation rates and optimized resin formulation that ensures consistent film formation
Solution Approach 2:
The patent converts the potential disadvantage of water-based systems (slower evaporation, potential for blistering) into benefits by carefully controlling the drying process and using crosslinking agents that prevent water-related defects, ultimately achieving superior safety and health outcomes without sacrificing coating quality
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 solution provides effective adhesion between rubber and fiber materials, is stable in storage and transportation, and meets environmental standards, offering a safer and more efficient production process.
Implementation Method 1
it may be based on a polyvinyl butyral resin and a silane crosslinking agent which has undergone a condensation reaction with water to form siloxane bonds
Implementation Method 2
it may be based on a polyvinyl butyral resin and an isocyanate crosslinking agent which has reacted to form urea linkages
Implementation Method 3
The adhesive coating may be allowed to dry at ambient temperature or in an oven at a temperature of from 50°C to 100°C for a period of from 5 to 30 minutes
Data Source
Figure 1
AI summary
Provided is an environment-friendly impregnation solution, which comprises the following raw materials in percentage by weight: 1-15% of blocked isocyanate, 0.5-10% of special amino resin, 10-50% of rubber latex, 1-5% of auxiliaries, and the balance of water, wherein the sum of the weight percentage of each component is 100%. Provided also is a method for preparing the environment-friendly impregnation solution, which comprises: adding blocked isocyanate and Auxiliary a into water and stirring uniformly to obtain Composition 1; adding Auxiliary b into Composition 1 and stirring uniformly to obtain Composition 2; adding special amino resin into Composition 2 and stirring uniformly, then subjecting the same to grinding to obtain Composition 3; adding rubber latex into Composition 3 and stirring uniformly to obtain the environment-friendly impregnation solution, followed by packaging. The impregnation solution of the invention does not contain toxic and harmful substances such as formaldehyde and resorcinol, and the preparation method thereof is simple, easy to operate, short in production cycle, and has a high safety factor, thus ensuring that the impregnation solution preparation and impregnation processes are safe and environment-friendly.