Water-Absorbent Resin Composition for Heat-Stable Cable Water Blocking
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Solution Overview
Problem
Water-absorbent resins used in water-blocking materials require a balance between high water-blocking ability and stability to prevent gel deterioration due to heat and environmental decomposition.
Innovation Solution
Incorporating a chelating agent with an iron(III) chelate stability constant (log KML) of 19.0 to 24.0 into water-absorbent resin particles, which are crosslinked with a polymer of water-soluble ethylenically unsaturated monomers, to enhance swelling and decomposition properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a water-absorbent resin with high stability is used to prevent gel deterioration by heat, then the resin is less likely to decompose in the natural environment
Solution Approach 1:
The invention changes the chemical composition parameters of the water-absorbent resin by incorporating specific chelating agents (with iron(III) chelate stability constants of 19.0 or more and 24.0 or less) and controlling the ratio of hydrophilic functional groups. This parameter optimization enables the resin to achieve both heat stability and environmental decomposability, resolving the contradiction between reliability and environmental burden.
2Productivity
If a water-absorbent resin with high swelling ability is used to stop water penetration immediately, then the gel may deteriorate by heat
Solution Approach 1:
The invention optimizes the chemical parameters by introducing chelating agents with specific iron(III) chelate stability constants (19.0 ≤ log KML ≤ 24.0) and controlling hydrophilic functional group ratios. This parameter control enables the resin to achieve rapid swelling for immediate water-blocking while maintaining heat stability, resolving the contradiction between productivity and reliability.
3Reliability
If the stability of the water-absorbent resin is increased to maintain water-blocking ability, then it becomes difficult to decompose in the natural environment
Solution Approach 1:
The invention changes the chemical composition parameters by incorporating chelating agents with specific stability constants and controlling the ratio of hydrophilic functional groups to a specific range. This parameter optimization enables the resin to maintain high water-blocking ability while improving decomposition ability in the natural environment, resolving the contradiction between reliability and ease of manufacture.
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 resulting resin composition exhibits high water-blocking ability with reduced gel deterioration, maintaining effective water penetration stopping and environmental friendliness.
Implementation Method 1
a chelating agent, the chelating agent having an iron(III) chelate stability constant (log KML) of 19.0 or more and 24.0 or less
Implementation Method 2
water-absorbent resin particles... have swelling ability that makes it possible to immediately stop water penetration
Implementation Method 3
the gel (swollen water-absorbent resin)
Data Source
AI summary
Provided are a water-absorbent resin composition that has high water-blocking ability as well as excellent decomposition ability and can be suitably used for a water-blocking material; and a water-blocking material comprising the composition.The water-absorbent resin composition of the present invention comprises water-absorbent resin particles and a chelating agent, the chelating agent having an iron(III) chelate stability constant (log KML) of 19.0 or more and 24.0 or less, and the water-absorbent resin composition having a 30-second swelling height of 6.0 mm or more. The water-absorbent resin composition of the present invention has high water-blocking ability as well as excellent decomposition ability and can be suitably used for a water-blocking material.