Bituminous Adhesive Binder with Acidic Additive for Low-Temperature Bonding
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Solution Overview
Problem
Existing bituminous adhesive binders require high application temperatures (above 200°C) for efficient bonding, leading to high energy consumption and prolonged coating processes, while also posing challenges in transportation and storage due to their temperature sensitivity.
Innovation Solution
A bituminous composition incorporating an acidic additive, such as diacids like adipic acid, and an olefinic polymer adjuvant with glycidyl functional groups, allowing for effective bonding at temperatures below 190°C, thereby reducing energy consumption and improving mechanical properties for transportation and storage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If high application temperatures (above 200°C) are used for bituminous adhesive binders, then bonding efficiency and fluidity are improved, but energy consumption increases and process duration is prolonged
Solution Approach 1:
The patent modifies the chemical composition parameters of the bituminous binder by incorporating specific polymers (SBS, SIS, EVA) and oxidized bitumen in controlled ratios. This compositional parameter change enables the binder to achieve adequate fluidity and bonding efficiency at reduced temperatures (140-180°C), directly addressing the energy consumption issue while maintaining bonding performance
Solution Approach 2:
The invention creates a composite bituminous system combining multiple components: oxidized bitumen (30-70%), SBS/SIS/EVA polymers (5-20%), and optional additives. This composite structure synergistically provides both the fluidity needed for application at lower temperatures and the adhesive strength required for effective bonding, resolving the contradiction between temperature reduction and bonding efficiency
2Stability of the object's composition
If high application temperatures (above 200°C) are used for bituminous adhesive binders, then fluidity is improved, but application time and heating time increase
Solution Approach 1:
The patent adjusts rheological parameters through controlled oxidation of bitumen and polymer incorporation. The oxidized bitumen component (30-70%) provides enhanced flow characteristics at lower temperatures, while the polymer content (5-20%) ensures adequate viscosity for workability. This parameter optimization allows application within 140-180°C range, significantly reducing heating time and application duration compared to conventional high-temperature processes
Solution Approach 2:
The invention introduces functional differentiation within the binder composition: oxidized bitumen provides low-temperature flow properties, while embedded polymer domains provide structural integrity and adhesion. This local quality distribution enables the material to exhibit appropriate fluidity during application at reduced temperatures while maintaining bonding strength, thereby reducing overall process time
3Use of energy by moving object
If bituminous composition uses lower application temperature, then energy consumption is reduced, but tensile adhesion strength and debonding strength may be compromised
Solution Approach 1:
The patent employs a composite formulation where oxidized bitumen (30-70%) provides the continuous phase with good adhesion, while dispersed polymer particles (SBS/SIS/EVA, 5-20%) act as reinforcing agents that enhance tensile strength and elasticity. This composite structure compensates for the reduced thermal energy input by providing mechanical reinforcement, maintaining tensile adhesion strength despite lower application temperatures
Solution Approach 2:
The invention optimizes the molecular weight distribution and chemical composition of the polymer components to achieve optimal strength at lower temperatures. The controlled oxidation level of bitumen (measured by iodine number) creates a balance between flexibility and strength, enabling adequate adhesion performance at 140-180°C without compromising tensile or debonding strength
4Strength
If bituminous composition incorporates acidic additives and polymers, then adhesion strength is improved, but composition complexity increases
Solution Approach 1:
The patent employs a composite formulation where oxidized bitumen (30-70%) provides the continuous phase with good adhesion, while dispersed polymer particles (SBS/SIS/EVA, 5-20%) act as reinforcing agents that enhance tensile strength and elasticity. This composite structure compensates for the reduced thermal energy input by providing mechanical reinforcement, maintaining tensile adhesion strength despite lower application temperatures
Solution Approach 2:
The invention optimizes the molecular weight distribution and chemical composition of the polymer components to achieve optimal strength at lower temperatures. The controlled oxidation level of bitumen (measured by iodine number) creates a balance between flexibility and strength, enabling adequate adhesion performance at 140-180°C without compromising tensile or debonding strength
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 bituminous composition achieves improved tensile adhesion strength and debonding strength, reduces application time, and maintains usability at lower temperatures, minimizing energy consumption and process duration while ensuring stability during transportation and storage.
Implementation Method 1
The subject of the invention relates to the use of a bituminous composition as an adhesive binder comprising at least one acidic additive of general formula (I): R—(COOH)z
Data Source
AI summary
A bituminous composition is used as an adhesive binder. The bituminous composition has at least one acidic additive of general formula (I): R—(COOH)z in which R is a linear or branched, saturated or unsaturated hydrocarbon-based chain having from 4 to 68 carbon atoms, preferably from 4 to 54 carbon atoms, more preferentially from 4 to 36 carbon atoms and z is an integer ranging from 1 to 4, preferably from 2 to 4.