Two-Step Reactive Lip System for Non-Sticky Gloss and Volume
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Solution Overview
Problem
Cosmetic products like lip glosses face challenges in achieving good wear, transfer resistance, and a glossy finish while avoiding stickiness, especially when intended to make lips appear fuller and plumper.
Innovation Solution
A two-step cosmetic system comprising a base coat with a styrenic block copolymer and surface-stabilized copolymer particles in a non-aqueous medium, and a top coat containing a silicone amine and viscous silicone, allowing the silicone amine to react with maleic anhydride for enhanced adhesion and longevity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If traditional lip gloss formulas are used to achieve a glossy finish and lip plumping effect, then the cosmetic provides good appearance and volume enhancement, but the product exhibits stickiness and poor wear resistance
Solution Approach 1:
The cosmetic system is divided into two separate coats: a base coat containing copolymer particles for volume enhancement and a top coat containing silicone amine for finish and wear. This segmentation allows each coat to be optimized for its specific function, with the base coat providing plumping and the top coat providing non-sticky glossy finish and wear resistance
Solution Approach 2:
The invention uses composite material systems combining multiple polymers and additives: copolymer particles (C1-C4 alkyl (meth)acrylate and maleic anhydride) in the base coat combined with silicone amine and viscous silicone in the top coat. This composite approach allows the system to achieve both volume enhancement and non-sticky glossy finish simultaneously
2Shape
If traditional lip gloss formulas are used to achieve a glossy finish, then the cosmetic provides good appearance, but the product has poor wear and transfer resistance
Solution Approach 1:
The two-coat system separates the glossy finish function (top coat with silicone amine) from the wear resistance function (base coat with copolymer particles and stabilizers). The top coat's silicone amine reacts with maleic anhydride to form a crosslinked network that provides both glossy finish and durable wear resistance
Solution Approach 2:
The invention changes the chemical parameters of the top coat by incorporating silicone amine with specific amine groups that react with maleic anhydride. This chemical parameter change creates a crosslinked polymer network that significantly improves wear and transfer resistance while maintaining the desired glossy finish
3Ease of operation
If a single-step cosmetic system is used, then the application process is simple, but the system cannot simultaneously achieve long wear, transfer resistance, and non-sticky glossy finish
Solution Approach 1:
The system is segmented into two application steps: first applying the base coat with copolymer particles for volume and adhesion, then applying the top coat with silicone amine for finish and wear. This two-step process achieves superior performance while maintaining ease of application through simple sequential steps
4Shape
If copolymer particles are used to enhance lip volume, then the cosmetic provides good plumping effect, but the product may become sticky
Solution Approach 1:
The base coat containing copolymer particles for plumping is separated from the top coat containing silicone amine for finish. The copolymer particles in the base coat provide volume enhancement without stickiness, while the silicone amine in the top coat provides the non-sticky glossy finish
Solution Approach 2:
The base coat acts as an intermediary layer between the lips and the top coat. It provides adhesion through copolymer particles and stabilizers, creating a foundation that prevents the top coat from becoming sticky while maintaining the glossy finish
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 system provides long-lasting wear, resistance to transfer and solvents, and maintains a glossy appearance while enhancing lip volume appearance.
Implementation Method 1
The top coat composition may be configured to allow the silicone amine to react with the maleic anhydride after the top coat is applied
Data Source
AI summary
Disclosed is a method for using a two-step cosmetic product, such as used on the lips, that includes the use of a basecoat that utilizes a surface-stabilized dispersion of copolymer particles and a styrenic block copolymer, and a top coat that utilizes a silicone amine and a viscous silicone, and where the composition(s) are configured to allow the silicone amine to react with the maleic anhydride after the top coat is applied.