Cross-linked Siloxane Composition for Polar Solvent Compatibility
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Solution Overview
Problem
Silicone elastomer gels have limited versatility in formulations with polar solvents such as hydrocarbon oils, ester oils, and plant-based oils, restricting their application and aesthetic/rheological properties in personal care and healthcare products.
Innovation Solution
A cross-linked composition is formed by reacting siloxanes with pendant anhydride groups and a reactant having reactive functional groups, such as organic polyols or hydroxyl-functional siloxanes, to enhance compatibility and functionality, including film-forming, substantivity, and rheological properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional silicone elastomer gels are used, then compatibility with non-polar organic solvents is achieved, but versatility in formulations with polar solvents is limited
Solution Approach 1:
The patent creates a composite material system by cross-linking siloxane chains with both polar (carboxyl) and non-polar (hydrocarbon) groups. This composite structure allows the gel to interact with both polar and non-polar solvents simultaneously, resolving the contradiction between formulation versatility and solvent compatibility
Solution Approach 2:
The siloxane gel is designed with local polar regions (carboxyl groups) and local non-polar regions (hydrocarbon chains). This local quality differentiation enables the material to exhibit dual compatibility - the polar carboxyl groups interact with polar solvents while the non-polar hydrocarbon portions maintain compatibility with non-polar solvents
2Adaptability or versatility
If cross-linking is performed to enhance aesthetic properties, then sensory profile is improved, but formulation versatility is restricted
Solution Approach 1:
The patent modifies the chemical parameters of the siloxane structure by introducing carboxyl groups through specific cross-linking reactions. This parameter change (adding polar functional groups) transforms the material properties to achieve both aesthetic benefits and enhanced formulation versatility without excessive structural complexity
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 cross-linked composition offers improved formulation versatility, aesthetic appeal, and rheological properties, providing a velvety feel and enhanced compatibility with organic solvents, suitable for personal care and healthcare applications.
Implementation Method 1
the reaction product of siloxanes having anhydride groups and a reactant having functional groups reactive with the anhydride groups
Data Source
AI summary
A cross-linked composition comprises the reaction product of siloxanes having pendant anhydride groups and a reactant having hydroxyl and/or amine functional groups. The cross-linked composition can be of the following general formula (I): (I). Refer to formula (l) Each X can be of the following general formula (i): (i). Refer to formula (i) Each of W and W* is independently an oxygen atom or N-R, with R independently being a hydrogen atom or R1. Each of Y, R3, and R13 is an independently selected divalent group. Each of R1, R11, R4, R14, R5, and R15 is an independently selected substituted or unsubstituted hydrocarbyl group. Each of w and ww, and each of y and yy, is an independently selected integer from 0 to 1,000. Each of x and xx is an independently selected integer from 1 to 100. Typically, w and y are not simultaneously 0, and ww and yy are not simultaneously 0.