Starch Maleic Polymer Blend for Alkaline Hard Water Scale Control
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Solution Overview
Problem
Hard water causes scaling issues and reduces the effectiveness of conventional alkaline detergents in industries like vehicle care, warewashing, and laundry, and existing solutions rely on phosphorous-containing compounds that are environmentally and health-concerned, necessitating a phosphorous-free alternative for scale control.
Innovation Solution
A novel combination of hydroxypolycarboxylic acid, maleic polymer, and starch-based polymer is used to control water hardness in alkaline cleaning conditions, preventing calcium and magnesium salt precipitation without phosphorous-containing materials, and can be incorporated into cleaning compositions or used separately.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If phosphorous-containing compounds (phosphates, phosphonates, phosphites, acrylic phosphinate polymers) are used as sequestering agents, then water hardness control and scale prevention are effective, but environmental and health concerns arise leading to government regulations
Solution Approach 1:
The patent removes phosphorous-containing compounds from the cleaning composition by replacing them with a novel polymer combination consisting of starch-based polymer, maleic polymer, and hydroxypolycarboxylic acid. This extraction eliminates the harmful environmental and health factors associated with phosphates while maintaining water hardness control functionality.
Solution Approach 2:
The patent changes the chemical composition parameters by substituting phosphorous-based sequestering agents with a polymer-based system. The specific parameter change involves using polymers with specific functional groups (carboxylic acid groups from maleic polymer and hydroxypolycarboxylic acid) that can bind calcium and magnesium ions, achieving the same water hardness control without phosphorous compounds.
2Reliability
If NTA or EDTA are used as sequestering agents, then metal ion solubilization and cleaning effectiveness are improved, but environmental persistence concerns lead to potential future regulations
Solution Approach 1:
The patent extracts and removes persistent aminocarboxylates (NTA, EDTA) from the cleaning system, replacing them with biodegradable polymer alternatives. The starch-based polymer, maleic polymer, and hydroxypolycarboxylic acid combination provides metal ion binding capability without the environmental persistence issues of conventional chelating agents.
Solution Approach 2:
The patent employs biodegradable polymers that break down into harmless substances after performing their water hardness control function. These polymers are environmentally friendly and do not persist in the environment like NTA and EDTA, aligning with the principle of using temporary, biodegradable substances rather than persistent chemicals.
3Reliability
If chelating agents are added to counteract hard water, then cleaning effectiveness is improved, but when water hardness exceeds chelating capacity, free calcium ions cause precipitation and scale formation
Solution Approach 1:
The patent uses a composite polymer system combining three different polymers (starch-based polymer, maleic polymer, and hydroxypolycarboxylic acid) that work synergistically to control water hardness. This composite approach provides enhanced calcium and magnesium ion binding capacity compared to single chelating agents, preventing scale precipitation even in hard water conditions.
Solution Approach 2:
The polymer combination serves multiple functions: it acts as a water hardness controller, scale inhibitor, and cleaning enhancer simultaneously. The system can handle a broad range of water hardness levels and provides comprehensive protection against scale formation on surfaces and equipment while maintaining cleaning effectiveness.
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 combination effectively prevents scale formation on surfaces and equipment, enhancing cleaning efficacy while being environmentally friendly by eliminating the use of phosphates and other regulated compounds.
Implementation Method 1
a starch based polymer, a maleic polymer and a hydroxypolycarboxylic acid that provides a phosphorous free composition that provides control of water hardness in alkaline conditions
Data Source
AI summary
The present invention includes methods and compositions control hard water in an alkaline environment. According to the invention, a unique combination of polymers has been developed which helps to completely control and eliminate hard water. The composition includes a maleic polymer, a hydroxypolycarboxylic acid, and a starch based polymer in a unique synergistic combination that can be used alone, or in combination with standard alkaline detergents in any cleaning regime (laundry, warewash, etc.) where hard water conditions exist.