Acrylate Encapsulates for High-Acid Perfume Stability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Perfume encapsulates with high acid values tend to leak and perform poorly due to instability, particularly when containing aldehydes and esters that form carboxylic acids, which impair the capsule wall, limiting the use of desirable fragrance compounds in consumer products.
Innovation Solution
The use of acrylate materials for the encapsulate shell, which provides stability even with perfumes having acid values greater than 5.0 mg KOH/g, reducing leakage and maintaining performance in applications like laundry detergents and hair shampoos.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If perfume compounds containing aldehydes, acetals, and/or esters are used to provide desirable scent experience, then the fragrance quality and consumer appeal are improved, but the acid value increases and capsule stability deteriorates leading to leakage
Solution Approach 1:
The patent changes the chemical parameter of the shell material from conventional polymers to polyaminoplastics with specific functional groups (carboxyl, hydroxyl, or amine groups). This parameter change allows the shell to chemically interact with and neutralize the higher acid values from aldehyde/ester perfume compounds, thereby maintaining capsule stability while permitting greater fragrance formulation flexibility.
Solution Approach 2:
The patent employs composite shell materials comprising polyaminoplastics with specific functional groups that can chemically interact with perfume compounds. This composite approach combines the encapsulation function with chemical buffering capacity, allowing the shell to simultaneously protect the perfume and neutralize acid-forming compounds, thus resolving the stability-flexibility contradiction.
2Reliability
If the acid value of perfume is limited to no more than 5 mg KOH/g to ensure capsule stability, then leakage is reduced, but the selection of desirable fragrance ingredients is restricted
Solution Approach 1:
The patent changes the key parameter from limiting perfume acid value to selecting shell material with specific chemical functionality (carboxyl, hydroxyl, or amine groups). This parameter shift allows the system to accommodate higher acid values by having the shell material chemically buffer the acidity, thereby expanding perfume formulation options while maintaining stability.
Solution Approach 2:
The polyaminoplastic shell acts as an intermediary between the perfume compounds and the external environment. The functional groups in the shell material serve as chemical mediators that neutralize acid-forming perfume compounds, allowing high acid value perfumes to be encapsulated stably without restricting formulation options.
3Ease of manufacture
If conventional shell materials are used with high acid value perfumes, then manufacturing is simpler, but capsule wall quality deteriorates and leakage increases
Solution Approach 1:
The patent changes the shell material parameter to polyaminoplastics with specific functional groups that provide chemical buffering capacity. This material selection maintains relatively simple manufacturing processes while significantly improving capsule wall integrity by chemically neutralizing acid-forming perfume compounds that would otherwise degrade the shell.
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 acrylate-based encapsulates exhibit low leakage and improved performance, allowing for the use of fragrances with higher acid values without compromising stability, especially in surfactant-containing compositions and aqueous environments.
Implementation Method 1
the shell having a polymeric material, the polymeric material including an acrylate polymer
Data Source
AI summary
A composition that comprises encapsulates, the encapsulates having a core that includes perfume characterized by an acid value of greater than 5.0 mg KOH/g of perfume, the encapsulates also including a shell that includes a (meth)acrylate material. Methods of making and using such compositions.