Block Copolymer Asphalt Modifier Dissolution Rate
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Solution Overview
Problem
The slow dissolution rate of asphalt modifiers, such as vinyl aromatic hydrocarbon/conjugated diene block copolymers, limits their productivity and affects the mechanical properties of asphalt, necessitating an improvement in solubility without compromising the use temperature range and lifetime of asphalt.
Innovation Solution
A method involving the use of a block copolymer formed by block-copolymerizing vinyl aromatic hydrocarbon and conjugated diene compounds, combined with functional additives like adipate and phthalate compounds, to enhance the solubility and dissolution rate of the asphalt modifier in asphalt, while maintaining the softening point and mechanical properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the solubility of asphalt modifier is increased by controlling the molecular weight and molecular structure of the polymer material, then the dissolution rate is improved, but the final mechanical physical properties deteriorate
Solution Approach 1:
The patent changes the chemical structure parameters of the polymer material by introducing specific functional groups (carboxyl, hydroxyl, amine, or isocyanate groups) with controlled content ratios (0.1-10 mmol/g). This allows improving dissolution rate through parameter modification while maintaining mechanical properties through controlled functional group content, resolving the contradiction between productivity and reliability.
Solution Approach 2:
The patent creates a composite polymer structure by combining base polymer with functional groups or additives that enhance solubility. The modified polymer material exhibits both improved dissolution rate and maintained mechanical properties due to the synergistic effect of the base polymer structure and functional modifications, effectively resolving the contradiction.
2Duration of action of stationary object
If block copolymer is used as asphalt modifier to increase the use temperature range and lifetime of asphalt, then the durability is improved, but the dissolution rate in asphalt becomes slow
Solution Approach 1:
The patent modifies the chemical parameters of block copolymer by introducing functional groups (carboxyl, hydroxyl, amine, or isocyanate) with specific content ranges (0.1-10 mmol/g). This parameter change enhances the interaction between copolymer and asphalt, accelerating dissolution rate while preserving the durability benefits of block copolymer structure.
Solution Approach 2:
The functional groups act as intermediary elements that facilitate the interaction between block copolymer and asphalt. These groups serve as chemical bridges that enhance solubility and dissolution rate without compromising the fundamental durability-providing structure of the block copolymer.
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 proposed method significantly reduces the dissolution time of the asphalt modifier without lowering the softening point, resulting in improved productivity and uniformity of the asphalt composition, enhancing its physical properties.
Implementation Method 1
the solution rate of asphalt modifier is slow, thereby having a direct effect on productivity. In order to improve productivity, the solubility of asphalt can be increased
Data Source
AI summary
Disclosed are block copolymer formed by block-copolymerizing vinyl aromatic hydrocarbon and conjugated diene compound and asphalt modifier composition including specific functional additives. Asphalt modifier composition according to the present invention is rapidly dissolved in asphalt without substantially lowering a softening point of asphalt, making it possible to form uniform asphalt composition and improve the productivity of the asphalt composition.