Oil-Containing Silicone Elastomer Particles to Resist Agglomeration
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Solution Overview
Problem
Conventional silicone elastomer particles exhibit high oil absorption and cohesion, leading to agglomeration over time, which compromises texture, feel, and stability in cosmetic applications, making them difficult to handle and disperse uniformly.
Innovation Solution
Incorporating liquid oil at 40°C into the silicone elastomer particles through cross-linking with silalkylene groups between 4 and 20 carbon atoms, forming a structure with low oil absorption and improved dispersibility, using a cross-linkable silicone emulsion particle process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If silicone elastomer particles are made fine through curing reaction, then particle diameter is reduced, but agglomeration into secondary particles occurs over time
Solution Approach 1:
The invention changes the chemical composition parameters of the silicone elastomer by incorporating specific amounts of silicon atom-bound hydrogen (5-50 ppm) and silicon atom-bound alkyl groups (5-50 ppm), which fundamentally alters the particle's surface properties and intermolecular forces to prevent agglomeration while maintaining fine particle size
Solution Approach 2:
The invention creates a composite silicone elastomer particle system combining multiple functional groups (silicon atom-bound hydrogen, silicon atom-bound alkyl groups, and silane crosslinking agents) that work synergistically to achieve both fine particle size and resistance to agglomeration
2Ease of operation
If silicone elastomer particles are made cohesive for softness, then texture and feel are improved, but agglomeration increases over time
Solution Approach 1:
The invention precisely controls the concentration parameters of silicon atom-bound hydrogen (5-50 ppm) and silicon atom-bound alkyl groups (5-50 ppm) to achieve the optimal balance between softness and agglomeration resistance, creating a new quality state of the silicone elastomer
3Ease of operation
If liquid oil is added to silicone elastomer particles to improve texture, then feel in use is enhanced, but oil absorption increases and stability decreases
Solution Approach 1:
The invention modifies the chemical composition parameters of the silicone elastomer to reduce oil absorption capacity while maintaining texture properties, allowing the particles to maintain their structural integrity and stability even when combined with liquid oils in cosmetic formulations
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 resulting particles maintain low oil absorption, prevent agglomeration, and enhance texture and feel in cosmetics, offering superior handling and storage stability, allowing for uniform dispersion without mechanical stirring.
Implementation Method 1
having a structure that includes, in the silicone elastomer particle, oil that is liquid at 40°C, wherein at least two silicon atoms within the silicone elastomer particle are cross-linked through a silalkylene group with a carbon number between 4 and 20
Data Source
AI summary
The present invention relates to an oil-including elastomer particle having a structure wherein at least two silicon atoms within the silicone elastomer particle are cross-linked through a silalkylene group with a carbon number of between 4 and 20, a structure that includes, in the silicone elastomer particle, an oil that is liquid at 40°C, and, preferably, the mixture of oil and the cross-linking silicone composition is cured in the form of emulsion particles, and also relates to the use thereof.