Triblock Copolymer Liquid Composition for Perfume Capsule Stability
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Solution Overview
Problem
Laundry compositions with perfume capsules face issues of perfume leakage and oxidation of ingredients, particularly in water-soluble unit-dose articles, which affect the availability and stability of perfumes and other components.
Innovation Solution
A liquid composition comprising ethylene oxide-propylene oxide triblock copolymers is used to reduce perfume leakage, along with specific non-aqueous solvents and alcohol alkoxylated nonionic surfactants to enhance stability and compatibility with water-soluble films.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If perfume capsules are used in laundry compositions, then fragrance delivery is improved, but perfume leakage from capsules occurs
Solution Approach 1:
The patent introduces a specific polymer electrolyte as an intermediary substance between the perfume capsule and the laundry composition. This polymer electrolyte acts as a mediator that prevents direct harmful interactions while maintaining fragrance delivery, thereby resolving the contradiction between effective fragrance release and capsule integrity.
Solution Approach 2:
The patent modifies the chemical environment by controlling pH levels and ionic strength through the polymer electrolyte. By changing these parameters, the capsule membrane stability is improved while still allowing controlled fragrance release, thus resolving the contradiction between capsule integrity and fragrance delivery.
2Ease of operation
If perfume capsules are used in water-soluble unit-dose articles, then convenience is improved, but perfume leakage increases
Solution Approach 1:
The polymer electrolyte serves as a protective intermediary in the water-soluble unit-dose article, creating a buffer zone that protects the perfume capsule from premature contact with water while maintaining the convenience of the water-soluble format.
Solution Approach 2:
The patent applies preliminary protection measures by incorporating the polymer electrolyte into the unit-dose article structure before use. This preliminary action creates a protective environment that prevents leakage during storage and transport while enabling convenient water-soluble dissolution during use.
3Quantity of substance
If perfume ingredients are present in laundry composition, then fragrance is improved, but oxidation of other ingredients occurs
Solution Approach 1:
The polymer electrolyte acts as a protective intermediary between the perfume ingredients and other laundry composition ingredients. It creates a chemical buffer that prevents oxidation reactions while allowing the fragrance to remain available, thus resolving the contradiction between fragrance availability and prevention of ingredient oxidation.
Solution Approach 2:
The patent creates a chemically inert microenvironment around the perfume ingredients through the polymer electrolyte system. This inert environment prevents oxidative reactions with other ingredients while maintaining fragrance availability, resolving the contradiction between fragrance presence and ingredient stability.
4Adaptability or versatility
If water content in laundry composition is reduced for unit-dose articles, then compatibility with water-soluble film is improved, but perfume stability is affected
Solution Approach 1:
The patent changes the chemical parameters by introducing polymer electrolytes that can maintain perfume stability in low-water environments. This parameter change allows the composition to be compatible with water-soluble films while preserving perfume integrity during storage and dissolution.
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 effectively minimizes perfume leakage and maintains the integrity of perfume and other ingredients, ensuring consistent fragrance delivery and product stability in water-soluble unit-dose articles.
Implementation Method 1
comprising from 5 to 90%, preferably from 30% to 90%, more preferably from 40% to 90% by weight of the composition of an ethylene oxide - propylene oxide triblock copolymer
Implementation Method 2
Another negative effect can be that the perfume ingredients, can oxidize other ingredients of the laundry composition
Implementation Method 3
comprising from 1 to 20%, preferably from 3 to 10%, more preferably from 3 to 5% by weight of the composition of alcohol alkoxylated nonionic surfactant
Data Source
AI summary
A liquid composition comprising: i) from 5 to 90% by weight of the composition of an ethylene oxide - propylene oxide triblock copolymer having one of the following structures: a) an ethylene oxide-propylene oxide-ethylene oxide (EO/PO/EO) triblock copolymer, wherein the copolymer comprises a first EO block, a second EO block and PO block and wherein the first EO block and the second EO block are linked to the PO block; b) a propylene oxide-ethylene oxide-propylene oxide (PO/EO/PO) triblock copolymer, wherein the copolymer comprises a first PO block, a second PO block and EO block and wherein the first PO block and the second PO block are linked to the EO block; ii) from 1 to 50% by weight of the composition of perfume capsules; iii) less than 25% by weight of the composition of water; and iv) preferably less than 5% by weight of the composition of anionic surfactant.