Rubber-Modified Asphalt Emulsion Stability via Diamine Pre-Treatment

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Solution Overview

Problem

Existing rubber-modified asphalt cement emulsions lack superior stability and effective shielding properties against water, fuel, and ultraviolet light degradation.

Innovation Solution

A pre-treated rubber-modified asphalt cement emulsion is prepared by contacting a rubber-modified asphalt cement with water and clay, or with an emulsifier comprising a diamine compound, to enhance emulsification and stability, and optionally including anti-foam agents and polymer latex.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If rubber-modified asphalt cement is emulsified without pre-treatment, then the emulsion can be prepared quickly, but the emulsion lacks superior stability and effective shielding properties against water, fuel, and UV degradation

Engineering Contradiction:
Improveemulsion stability and degradation resistanceVSAvoidemulsion preparation process
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The patent applies preliminary action by pre-treating the rubber-modified asphalt cement with diamine compounds and other agents before emulsification. This pre-treatment step modifies the asphalt cement surface in advance to enhance subsequent emulsion stability and degradation resistance, resolving the contradiction between quick preparation and superior performance.

Inventive Principle:
Principle #10Preliminary action

Solution Approach 2:

The patent uses diamine compounds, anti-foam agents, and polymer latex as intermediary substances that facilitate the emulsification process and enhance emulsion properties. These intermediaries bridge the rubber-modified asphalt cement and water phase, improving stability and shielding properties without significantly complicating the overall process.

Inventive Principle:
Principle #24Intermediary (Mediator)

2Reliability

If pre-treatment with diamine compound and clay is applied, then emulsion stability and degradation resistance are improved, but the manufacturing process becomes more complex

Engineering Contradiction:
Improveemulsion stability and degradation resistanceVSAvoidemulsion preparation process
Core Design Contradiction:
ReliabilityVSEase of manufacture

Solution Approach 1:

The patent applies parameter changes by modifying the chemical composition of the rubber-modified asphalt cement through pre-treatment with diamine compounds and clay. This changes the surface properties and chemical characteristics of the asphalt, enabling superior emulsion stability and degradation resistance while maintaining a relatively straightforward manufacturing process.

Inventive Principle:
Principle #35Parameter changes

3Ease of manufacture

If conventional emulsification method is used, then the preparation process is simple, but the emulsion exhibits poor resistance to water, fuel, and UV degradation

Engineering Contradiction:
Improveemulsion preparation processVSAvoidwater, fuel, and UV degradation
Core Design Contradiction:
Ease of manufactureVSObject-affected harmful factors

Solution Approach 1:

The patent uses diamine compounds, anti-foam agents, and polymer latex as intermediary substances that facilitate the emulsification process and enhance emulsion properties. These intermediaries bridge the rubber-modified asphalt cement and water phase, improving stability and shielding properties without significantly complicating the overall process.

Inventive Principle:
Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent creates a composite emulsion system by combining rubber-modified asphalt cement with diamine compounds, clay, anti-foam agents, and polymer latex. This composite approach provides enhanced resistance to water, fuel, and UV degradation while maintaining ease of manufacture through a unified emulsification process.

Inventive Principle:
Principle #40Composite materials

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 pre-treated emulsion exhibits improved stability, reduced softening point, and enhanced resistance to water, fuel, and UV degradation, resulting in a more effective and durable asphalt cement composition.

Implementation Method 1

contacting a rubber-modified asphalt cement with an emulsifier comprising a diamine compound and water

Methodology Applied
Scientific EffectEmulsification: Emulsion

Implementation Method 2

contacting the pre-treatment mixture with water and clay

Methodology Applied
Scientific EffectAdsorption: Adsorption

Implementation Method 3

optionally including anti-foam agents

Methodology Applied
Scientific EffectAnti-foaming: Antifoam

Implementation Method 4

optionally including anti-foam agents and polymer latex

Methodology Applied
Scientific EffectSteric stabilization:

Data Source

PatentUS10233120B2System and method for pre-treatment of rubber-modified asphalt cement, and emulsions thereof
Publication Date: 2019.03.19 WRIGHT ADVANCED ASPHALT SYST

AI summary

This invention encompasses asphalt cement emulsions, as well as methods for preparing a pre-treated rubber-modified asphalt cement emulsions and methods for coating industrial surfaces using asphalt cement emulsions.