Bituminous Glue Thixotropy Clay Dispersing Agent
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Solution Overview
Problem
Existing bituminous glues for cold construction material applications have limited watertight properties due to a low bitumen content, which increases viscosity and makes application difficult, while maintaining thixotropic properties without organic solvents is challenging.
Innovation Solution
A bituminous glue with at least 35% by weight of bitumen, combined with clay and a dispersing agent, and optionally up to 30% non-polymerized oil, VOC or non-VOC solvents, and fibers, forming a mono-component glue that maintains thixotropic properties and improves viscosity and cohesion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the bitumen content is increased to improve watertight properties, then the adhesive and watertight performance is improved, but the viscosity increases making application difficult
Solution Approach 1:
The patent changes the chemical composition parameters by introducing specific additives (clay, dispersing agents, and polymerized oil) that modify the rheological properties of the bituminous glue. These parameter changes allow the formulation to maintain high bitumen content (at least 35% by weight) while controlling viscosity through the thixotropic effects of the additives, thus improving watertight properties without making application difficult
Solution Approach 2:
The patent creates a composite material system by combining bitumen with clay particles, dispersing agents, and polymerized oil. This composite formulation allows the bitumen to provide watertightness while the clay-dispersing agent complex provides thixotropic behavior that controls viscosity, resolving the contradiction between high bitumen content and ease of application
2Stability of the object's composition
If organic solvents are used to maintain thixotropic properties, then the rheological behavior is improved, but environmental friendliness is compromised
Solution Approach 1:
The patent replaces persistent organic solvents with a system based on clay particles and dispersing agents that provide thixotropic properties through physical mechanisms rather than chemical solvation. This substitution eliminates harmful volatile organic compounds while maintaining the desired rheological behavior, achieving environmental friendliness without sacrificing thixotropic properties
Solution Approach 2:
The patent introduces clay particles as an intermediary substance that mediates the thixotropic behavior of the glue. The dispersing agent acts as a mediator between the clay particles and the bitumen-oil matrix, creating a stable suspension that exhibits thixotropic properties without requiring organic solvents, thus resolving the contradiction between rheological performance and environmental impact
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 enhanced watertight and adhesive properties without significantly increasing viscosity, while being environmentally friendly and maintaining thixotropic behavior, as demonstrated by improved peeling test results after artificial aging.
Implementation Method 1
The known glue is thixotropic, which means that it becomes fluid when shaken, stirred or otherwise agitated and sets again to a gel when allowed to stand
Implementation Method 2
Bituminous glue is used in cold gluing of construction material in particular for its watertight properties
Implementation Method 3
The known glue further comprises a limited amount of bitumen which forms an additional adhesive
Data Source
AI summary
A bituminous glue for cold gluing of construction material and comprising an amount of non-polymerized oil, said glue comprises at least 35 % by weight of bitumen, said glue further comprising clay and a dispersing agent, said amount of non-polymerized oil forming between 5 and 30 % by weight of said glue and being not mixed with polymerized oil.