Cross-linking Agent for Odor-Reducing Superabsorbent Polymers
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Solution Overview
Problem
Super absorbent polymers used in hygiene products face challenges in maintaining high absorption capacity and strength while minimizing odor, as existing cross-linking agents can lead to reduced physical properties and odor issues when used in combination with porous adsorbent materials.
Innovation Solution
A novel cross-linking agent compound with a specific structure, represented by Chemical Formula 1, is used to create a polymer that exhibits high cross-linking density and strength initially, with a pyrolytic internal cross-linking structure that decomposes at higher temperatures, improving absorption ability and reducing odor through a natural deodorizing effect.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional cross-linking agents are used to maintain strength and shape, then the polymer structure is stabilized, but odor is generated and absorption ability deteriorates
Solution Approach 1:
The patent changes the chemical parameters of the cross-linking agent by using a specific compound structure (divinyl benzene or polyethylene glycol diacrylate) with controlled molecular weight and functional groups. This parameter change allows the cross-linking agent to provide structural stability while reducing odor generation through optimized chemical composition and cross-linking density.
Solution Approach 2:
The patent creates a composite system by combining the acrylic acid-based polymer with specific cross-linking agents (divinyl benzene or polyethylene glycol diacrylate) in controlled ratios. This composite approach allows the cross-linking agent to fulfill multiple functions: maintaining polymer structure, controlling cross-linking density, and minimizing odor while preserving absorption capacity.
2Strength
If cross-linking density is increased to improve strength, then shape maintenance is improved, but water absorption ability deteriorates
Solution Approach 1:
The patent optimizes the cross-linking density by controlling the amount and type of cross-linking agent used. By adjusting the molecular weight, functional group concentration, and addition ratio of the cross-linking agent, the patent achieves an optimal balance where sufficient cross-linking provides shape maintenance while leaving enough space in the polymer network for water absorption.
Solution Approach 2:
The patent creates local variations in cross-linking density within the polymer structure. The cross-linking agent forms localized cross-linked regions that provide structural support, while maintaining less dense regions that facilitate water absorption. This local quality differentiation allows simultaneous achievement of strength and absorption capacity.
3Object-generated harmful factors
If porous adsorbent material is added to reduce odor, then odor is reduced, but physical properties such as absorption ability and permeability deteriorate
Solution Approach 1:
The patent extracts the odor-reduction function from separate porous adsorbent materials and integrates it into the cross-linking agent itself. The cross-linking agent is designed to provide both structural function and odor control through its chemical composition, eliminating the need for additional porous materials that would compromise absorption ability and permeability.
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 maintains excellent absorption properties and strength while reducing odor, as the cross-linking density increases from inside to outside, enhancing water retention capacity and absorption under pressure, and providing a natural aroma without additional additives.
Implementation Method 1
internal cross-linking density of the polymer can be controlled by polymerizing an acrylic acid-based monomer in the presence of an internal cross-linking agent
Implementation Method 2
the polymer in which the cross-linking agent compound of the present disclosure and the acrylic acid-based monomer are polymerized is capable of pyrolysis in which the cross-linking structure is decomposed at a predetermined temperature or higher
Implementation Method 3
A super absorbent polymer (SAP) is a type of synthetic polymeric material capable of absorbing 500 to 1000 times its own weight of moisture
Data Source
AI summary
The present disclosure relates to a novel cross-linking agent compound and a polymer prepared using the same. Specifically, the present disclosure relates to a cross-linking agent compound having a novel structure and excellent in cross-linking and pyrolysis, and a polymer prepared using the same.