Solid Soap Composition with Odd-Chain Fatty Acids for Cold Water Foaming
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Solution Overview
Problem
Solid soaps using only saturated fatty acids face issues with storage stability, discoloration, odor deterioration, reduced solubility, and poor foaming in cold water, as well as difficulty in spreading and providing slipperiness when used at high concentrations.
Innovation Solution
A solid soap composition comprising 77-91% alkali metal salt of saturated fatty acids with an even number of carbon atoms, 0.005-1% alkali metal salt of saturated fatty acids with an odd number of carbon atoms, 0.5-5% glycerol, and 5-18% water, which improves productivity, foaming in both lukewarm and cold water, and spreadability with enhanced slipperiness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If unsaturated fatty acids are used to maintain solubility and formability of soap, then the solubility and formability are improved, but the storage stability deteriorates due to discoloration and odor deterioration
Solution Approach 1:
The patent changes the chemical composition parameters by specifying precise ratios of saturated fatty acid salts (C12-C18) and odd-chain fatty acid salts (C13-C17) to achieve optimal balance between solubility and storage stability without using unsaturated fatty acids
Solution Approach 2:
The patent creates a composite soap formulation combining multiple saturated fatty acid salts with specific carbon chain lengths and odd-chain fatty acid salts to achieve properties that individual components cannot provide alone, specifically balancing formability with long-term stability
2Reliability
If only saturated fatty acids are used to improve storage stability, then discoloration and odor deterioration are reduced, but cracks are generated during stamping and productivity decreases
Solution Approach 1:
The patent adjusts the chemical composition parameters by introducing odd-chain fatty acid salts (C13-C17) at controlled concentrations (0.005-1 mass%) to modify the soap's physical properties, reducing cracking during stamping while maintaining storage stability
Solution Approach 2:
The patent applies local quality modification by incorporating specific odd-chain fatty acid components that locally alter the soap matrix properties in ways that prevent cracking during forming while preserving overall stability
3Reliability
If only saturated fatty acids are used to improve storage stability, then discoloration and odor deterioration are reduced, but the solubility during use decreases
Solution Approach 1:
The patent modifies composition parameters by incorporating odd-chain fatty acid salts (C13-C17) at optimized concentrations to enhance the solubility of saturated fatty acid salts during use while preserving storage stability
4Ease of operation
If solid soap is applied at high concentration to improve slipperiness, then slipperiness is enhanced, but the soap does not spread well over a wide area
Solution Approach 1:
The patent changes the chemical composition parameters by incorporating odd-chain fatty acid salts (C13-C17) that modify the soap's surface properties and spreadability, enabling excellent slipperiness even at high concentrations while maintaining good spreadability over wide areas
Data Source
AI summary
A solid soap containing, (A) 77 to 91 mass % of an alkali metal salt of a saturated fatty acid having an even number of carbon atoms from 12 to 18, (B) 0.005 to 1 mass % of an alkali metal salt of a saturated fatty acid having an odd number of carbon atoms from 13 to 17, (C) 0.5 to 5 mass % of glycerol, and (D) 5 to 18 mass % of water.