Solvent-Free Thermoplastic Pipe Bonding With Cyanoacrylate Adhesive
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Solution Overview
Problem
Solvent-based adhesives used in thermoplastic piping systems pose health and environmental concerns due to hazardous volatile organic compounds (VOCs) and require complex two-component mixing, leading to usability and packaging waste issues.
Innovation Solution
A solvent-free cyanoacrylate adhesive system with a flexible, gap-filling formula that includes cyanoacrylate monomer, plasticizers, and catalysts, offering one-component ease of use and rapid curing for bonding thermoplastic pipes and fittings, providing high shear strength and pressure resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If solvent-based adhesives are used for bonding thermoplastic piping systems, then good bonding performance is achieved, but harmful VOC emissions occur and health/environmental safety deteriorates
Solution Approach 1:
The patent changes the chemical composition parameters of the adhesive by replacing solvent-based formulations with water-based or solvent-free formulations. This maintains the bonding function while eliminating harmful VOC emissions, directly resolving the contradiction between bonding performance and environmental safety
Solution Approach 2:
The patent converts the previously harmful solvent component into beneficial water-based or completely solvent-free formulations. The adhesive achieves effective bonding without relying on harmful organic solvents, transforming a harmful bonding mechanism into a safe one while maintaining bonding effectiveness
2Strength
If two-component adhesive systems are used, then bonding performance is improved, but device complexity and packaging waste increase
Solution Approach 1:
The patent merges previously separate adhesive components into a single pre-mixed one-component formulation. This eliminates the need for complex mixing operations and multiple packaging containers, reducing device complexity and packaging waste while maintaining bonding performance through optimized single-component chemistry
Solution Approach 2:
The one-component adhesive system performs multiple functions that previously required separate components: it provides both the adhesive matrix and curing mechanism in a single product. This universal formulation simplifies the application process while maintaining effective bonding 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 system significantly reduces VOC emissions, enhances bonding performance with high shear strength and temperature resistance, and simplifies installation by extending open time and reducing fixture time, while being safer and more environmentally friendly.
Implementation Method 1
comprises at least one cyanoacrylate monomer that polymerizes in the presence of an initiator
Data Source
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AI summary
Method for bonding a thermoplastic piping system (1) without the use of solvent-based adhesives, the piping system (1) comprising at least one first pipe or fitting part (11), and at least one second pipe or fitting part (12), which comprises the steps of i) applying a cyanoacrylate adhesive (2) onto at least one surface of the at least one first pipe or fitting part (11), or at least one second pipe or fitting part (12), ii) inserting together the at least one first pipe or fitting part (11), and the at least one second pipe or fitting part (12) before an open time lapses, iii) removing the excess of cyanoacrylate adhesive (2), iv) allowing the adhesive to cure. Associated adhesive for bonding a thermoplastic piping system (1) without the use of solvents, comprising a cyanoacrylate monomer (21), a polymerization inhibitor, a viscosity thickener, and a curing speed adjusting catalyst.