Laundry Detergent Silicone Cationic Polymer Ratio
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Solution Overview
Problem
Current fabric softening laundry compositions do not provide sufficient softness benefits and improved cleaning, particularly after multiple wash cycles, despite the use of cationic polymers and silicones.
Innovation Solution
A liquid laundry detergent composition with a pH of 6 to 10, comprising 1 to 80 wt.% surfactant, 0.1 to 10 wt.% fabric softening silicone, and 0.05 to 2.5 wt.% cationic polysaccharide polymer, with a preferred weight ratio of silicone to cationic polymer from 4.5:1 to 1.5:1, which includes preferred components like cationic guar and cellulose polymers, and optionally additional ingredients such as dyes, enzymes, and builders.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If cationic polymers and silicones are used in laundry detergent compositions, then fabric softness is improved, but the softening benefit is insufficient after multiple wash cycles
Solution Approach 1:
The patent applies parameter changes by optimizing the weight ratio of silicone to cationic polymer within the specific range of 1.5:1 to 4.5:1, and by controlling the pH of the composition between 6 and 10. These parameter optimizations ensure that the fabric softening benefit is maintained consistently across multiple wash cycles, resolving the contradiction between softness durability and softening efficacy.
Solution Approach 2:
The patent uses a composite material system combining silicone and cationic polymer in a specific weight ratio range of 1.5:1 to 4.5:1. This composite approach leverages the complementary properties of both materials - silicone provides immediate softness while the cationic polymer ensures durability through multiple wash cycles, thereby resolving the contradiction between immediate softening efficacy and long-term softness reliability.
2Reliability
If fabric softening agents are added to detergent composition, then fabric softness is improved, but cleaning efficacy is not sufficiently improved
Solution Approach 1:
The patent optimizes the concentration parameters of fabric softening agents (silicone at 0.1-10 wt% and cationic polymer at 0.05-2.5 wt%) and the pH range (6-10) to achieve a balance where fabric softness is significantly improved while maintaining or enhancing cleaning efficacy, rather than sacrificing one for the other.
Solution Approach 2:
The composite material system of silicone and cationic polymer in a controlled weight ratio provides dual functionality - the silicone component delivers fabric softness while the cationic polymer component contributes to both softness durability and cleaning performance, thus resolving the contradiction between softness improvement and cleaning efficacy.
3Reliability
If higher concentrations of cationic polymer are used, then fabric softening is improved, but the optimal ratio with silicone is not achieved
Solution Approach 1:
The patent defines a precise parameter range for the weight ratio of silicone to cationic polymer (1.5:1 to 4.5:1) and controls the pH parameter between 6 and 10. This parameter optimization ensures maximum fabric softening benefit while maintaining the correct compositional balance, resolving the contradiction between softening benefit and composition ratio precision.
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 improved fabric softening and cleaning efficacy, with a statistically significant softening benefit when the silicone to cationic polymer ratio is within the specified range, enhancing the fabric's softness and maintaining it across multiple wash cycles.
Implementation Method 1
comprising 1 to 80 wt.% surfactant, 0.1 to 10 wt.% fabric softening silicone, and 0.05 to 2.5 wt.% cationic polysaccharide polymer, wherein the weight ratio of the silicone to cationic polysaccharide polymer is from 4.5:1 to 1.5:1
Data Source
AI summary
The invention is directed to laundry compositions containing (a) surfactant, (b) a cationic polysaccharide polymer, and (c) a fabric softening silicone, wherein the weight ratio of silicone to cationic polysaccharide polymer is from 4.5:1 to 1.5:1.