Solid Detergent Dimensional Stability via Phosphonopolyacrylic Acid
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Solution Overview
Problem
Conventional solid alkaline detergents face issues with dimensional instability due to hydration state changes, leading to swelling and packaging problems, and they often contain phosphates or NTA, which are environmentally concerning.
Innovation Solution
A solid detergent composition comprising phosphonocarboxylic acid copolymers or phosphonopolyacrylic acid homopolymers, hydratable salts like sodium carbonate, and water, which are substantially phosphorus-free and NTA-free, providing dimensional stability by controlling water movement and interactions within the composition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If conventional solid alkaline detergents use hydrated sodium carbonate materials for solidification, then the detergent achieves solid form and functionality, but the product becomes dimensionally unstable and swells after manufacturing due to hydration state changes
Solution Approach 1:
The patent changes the chemical composition parameters by replacing conventional hydratable salts with specific hydrates of calcium chloride, calcium bromide, calcium iodide, strontium chloride, or barium chloride. These alternative hydrates provide stable crystal structures that resist hydration state changes, thereby maintaining dimensional stability while preserving solidification functionality.
Solution Approach 2:
The patent creates composite detergent formulations by combining the alternative hydrates with cleaning agents and other detergent components. This composite approach allows the stable hydrate framework to provide dimensional stability while the cleaning agents deliver the required洗涤 functionality, resolving the contradiction between stability and reliability.
2Object-affected harmful factors
If conventional solid detergents contain phosphates or NTA as binding agents and hardness sequestrants, then the detergent achieves effective cleaning performance, but the product becomes environmentally harmful
Solution Approach 1:
The patent removes harmful phosphates and NTA from the detergent formulation entirely. By extracting these environmentally harmful components and replacing them with alternative binding agents and hardness sequestrants, the patent eliminates environmental harm while maintaining the essential cleaning functionality through alternative chemical mechanisms.
Solution Approach 2:
The patent employs biodegradable and environmentally benign alternatives to conventional phosphates and NTA. These alternative components are designed to be less persistent in the environment, effectively replacing long-lived harmful substances with shorter-lived, safer alternatives that degrade more readily.
3Adaptability or versatility
If conventional solid detergents allow hydration state shifts between hydrate forms, then the detergent achieves flexibility in manufacturing, but the product experiences structural and dimensional changes that lead to failure
Solution Approach 1:
The patent changes the crystalline parameter stability by selecting hydrates with stable crystal structures that resist polymorphic transitions. These alternative hydrates maintain consistent intermolecular spacing and crystal lattice parameters across varying humidity and temperature conditions, ensuring dimensional precision while allowing manufacturing flexibility.
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 composition achieves dimensional stability with a growth exponent of less than 3%, preventing swelling and ensuring the solid detergent remains stable under varying temperatures, while being environmentally friendly by avoiding phosphorus and NTA.
Implementation Method 1
The stability enhancement agent controls water transfer within a solid composition
Implementation Method 2
The stability enhancement agent controls water transfer within a solid composition or forms favorable interactions with other components in the composition
Data Source
AI summary
Stability enhancement agents for use in a solidification matrices and solid detergent compositions are described. Stability enhancement is provided by a hydratable salt, water and phosphonocarboxylic acid copolymers or phosphonopolyacrylic acid homopolymers binding agents forming a dimensionally stable composition. Preferred phosphonocarboxylic acid copolymers or phosphonopolyacrylic acid homopolymers have phosphono end groups and a molecular weight of between about 1,000 and about 30,000 grams/mole. The stability enhancement composition for use in a solid detergent and solid detergent compositions are preferably biodegradable and substantially free of phosphorus and NTA-free.