Crosslinked Organosilicone Resin for Flexible Sebum-Resistant Films
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Solution Overview
Problem
Existing organosilicone resins used in cosmetics face issues of brittleness leading to film cracking and poor oil resistance, resulting in poor makeup retention and discomfort due to tackiness.
Innovation Solution
A crosslinked organosilicone resin is developed by reacting a silicone or hydrocarbon with an alkenyl group at both ends with a hydrosilyl group-containing organosilicone resin, allowing it to be soluble in liquid oil at room temperature and form a flexible film upon oil evaporation, enhancing flexibility and oil resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an organosilicone resin is used as a film-forming component in cosmetics, then makeup retention is improved, but the film becomes brittle and cracks under substrate movement
Solution Approach 1:
The invention uses a composite system combining organosilicone resin with specific plasticizers (silicone oils or esters) to create a film that maintains both strength and flexibility. The plasticizer molecules integrate into the resin matrix, modifying its mechanical properties without compromising adhesion.
Solution Approach 2:
The invention modifies the physical and chemical parameters of the organosilicone resin by controlling the degree of crosslinking, molecular weight, and plasticizer content. These parameter changes transform the resin from a brittle state to a flexible, elastic film-forming state that can withstand substrate movement.
2Strength
If a silicone gum is incorporated as a plasticizer to improve film flexibility, then the film can follow substrate movement, but film strength deteriorates and adhesion increases causing stickiness
Solution Approach 1:
The invention precisely controls the type and amount of plasticizer used, specifying particular silicone oils or esters with defined molecular structures and concentrations. This parameter control achieves the right balance between flexibility and adhesion, avoiding excessive stickiness while maintaining film integrity.
3Strength
If an organosilicone resin is used for film formation, then the film has good mechanical strength, but it has poor oil resistance and the film swells over time causing physical strength deterioration
Solution Approach 1:
The invention creates a composite film system where the organosilicone resin provides mechanical strength while the crosslinked structure and specific plasticizer selection provide oil resistance. The crosslinked network prevents oil penetration and swelling, maintaining film stability over time.
Solution Approach 2:
The invention introduces crosslinked structures at specific locations within the film matrix to provide localized oil resistance while maintaining overall flexibility. The crosslinked regions act as barriers to oil penetration without compromising the film's ability to follow substrate movement.
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 crosslinked resin provides a strong, flexible film with improved makeup retention, comfort, and resistance to sebum, offering excellent spreadability and finish appearance without tackiness.
Implementation Method 1
reacting a silicone or hydrocarbon having an alkenyl group at both ends with a hydrosilyl group-containing organosilicone resin
Implementation Method 2
when the oil is a volatile oil, the crosslinked organosilicone resin dissolved in an oil is formed a film by volatilizing the oil
Data Source
AI summary
Described herein is a crosslinked organosilicone resin that has a crosslinked structure formed by reacting a silicone or hydrocarbon having an alkenyl group at both ends thereof with a hydrosilyl group-containing organosilicone resin, is soluble with a liquid oil at room temperature, and forms a film by volatilization of the oil. Also described herein is a method for preparing a crosslinked organosilicone resin and cosmetics containing a crosslinked organosilicone resin.