Polyether Side Chain Polymer for Inorganic Binder Dispersant
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Solution Overview
Problem
Conventional dispersants in powder form for inorganic binder compositions face challenges in achieving high flowability, temperature robustness, low caking tendency, and high insensitivity to shearing, often requiring additional auxiliaries that can reduce active ingredient content and affect binder composition properties.
Innovation Solution
A polymer is developed through copolymerizing monomers with ethylenically unsaturated monomers containing acid groups and polyether groups, specifically designed to have a molar ratio of 75:25 to 99.5:0.5, which enhances metering robustness, slump retention, and segregation properties in inorganic binder compositions, while minimizing the use of auxiliaries.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional dispersants are used in powder form, then flowability can be improved, but temperature robustness deteriorates and caking tendency increases
Solution Approach 1:
The patent applies parameter changes by modifying the chemical structure of the polymer dispersant, specifically incorporating polyether side chains with controlled repeating units (5-150) and adjusting the ratio of carboxylate to sulfonate groups. This structural parameter optimization enables the powder to maintain both flowability and temperature robustness simultaneously, resolving the contradiction between ease of operation and reliability
2Ease of operation
If auxiliary additives are added to improve powder properties, then flowability improves, but active ingredient content decreases
Solution Approach 1:
The patent extracts and eliminates the need for auxiliary additives by incorporating flowability-enhancing features directly into the polymer dispersant structure itself. The polyether side chains and optimized functional group ratios provide inherent flow properties, allowing the product to achieve good flowability without adding separate auxiliary substances, thus maintaining high active ingredient content
3Stability of the object's composition
If polymer metering is increased to improve segregation properties, then segregation improves, but slump retention deteriorates
Solution Approach 1:
The patent applies parameter changes by optimizing the polymer's molecular structure, specifically the polyether side chain length (5-150 repeating units) and the ratio of carboxylate to sulfonate groups. This structural optimization enables the polymer to provide effective segregation at lower dosages while maintaining slump retention, resolving the contradiction between segregation properties and ease of operation
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 polymer achieves excellent powder properties with high flowability, temperature robustness, and low caking tendency, maintaining performance across a wide polymer metering range and ensuring good segregation in inorganic binder compositions.
Implementation Method 1
The invention relates to a polymer which is obtainable by copolymerizing monomers comprising at least one ethylenically unsaturated monomer which comprises at least one acid group and at least one ethylenically unsaturated monomer having polyether groups
Data Source
AI summary
The invention relates to a polymer which is obtainable by copolymerizing monomers comprising at least one ethylenically unsaturated monomer which comprises at least one acid group and at least one ethylenically unsaturated monomer (II) having polyether groups with 5 to 35 repeating units and at least one ethylenically unsaturated monomer (III) having polyether groups with 45 to 150 repeating units, the molar ratio of monomer (II) to monomer (III) being between 75:25 and 99.5:0.5. Further disclosed are the use of the polymer of the invention as an admixture for inorganic binder compositions, and a composition in powder form comprising an inorganic binder and the polymer of the invention.