Block Copolymer Lip Gloss with Tackifier for Long-Lasting Shine
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Solution Overview
Problem
Commercially available lip treatment compositions, such as lip glosses and lipsticks, often have limited wear time and are uncomfortable to apply due to high molecular weight polymers causing tackiness, and existing shine-enhancing methods fail to provide long-lasting, transfer-resistant gloss.
Innovation Solution
A lip treatment composition combining a block copolymer with a tackifier and solvents capable of solubilizing both the hard and soft segments, which controls the physical and rheological properties to deliver a comfortable, long-lasting shine or gloss, and a method involving a basecoat and topcoat system using polyorganosiloxane-containing polymers for enhanced wear and transfer resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If high molecular weight polymers are used to maintain wear of shine/gloss, then longevity is improved, but comfort and ease of application deteriorate due to tackiness
Solution Approach 1:
The patent changes the molecular weight parameter of the polymer from high (causing tackiness) to low (improving comfort), while compensating for wear longevity through the specific block copolymer architecture (hard and soft segments) and formulation with tackifiers and solvents that maintain film integrity without requiring high polymer viscosity
Solution Approach 2:
The patent creates a composite system combining block copolymer, tackifier, and specific solvents that work synergistically to provide both comfort (low tackiness) and longevity (durable shine/gloss), where each component contributes different properties that collectively resolve the contradiction
2Illumination intensity
If high refractive index fluids are used to enhance shine or gloss, then shine/gloss is improved, but wear time deteriorates
Solution Approach 1:
The patent combines high refractive index fluids with block copolymer and tackifier in a composite formulation where the polymer matrix provides durable film formation for extended wear, while the high refractive index fluid particles dispersed within provide enhanced shine/gloss, resolving the trade-off between shine intensity and wear duration
3Illumination intensity
If silicone fluids are used to improve shine/gloss, then shine is enhanced, but wear of shine deteriorates
Solution Approach 1:
The patent transitions from using silicone fluids (which provide shine but poor wear) to using block copolymer with specific glass transition temperatures and molecular architecture that forms a more durable film, while maintaining shine properties through the copolymer's optical characteristics and formulation
Solution Approach 2:
The patent creates a composite system where block copolymer, tackifier, and solvents work together to provide both the shine enhancement previously achieved by silicones and the improved wear characteristics that silicones alone could not deliver
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 composition provides a comfortable, long-lasting shine or gloss with improved wear time and reduced tackiness, while the basecoat-topcoat system ensures long-lasting, transfer-resistant cosmetic application.
Implementation Method 1
applying a topcoat composition over top of the basecoat composition, the topcoat composition being the composition as defined previously
Implementation Method 2
impart attributes such as gloss, shine and lubricity
Implementation Method 3
at least one polyorganosiloxane containing polymer chosen among (1) the (co)polymers comprising at least one organosiloxane unit and at least two other groups capable of forming hydrogen interactions
Implementation Method 4
a solvent capable of solubilizing the soft segment causes the block copolymer to possess a morphology and rheology different from that obtained using a solvent capable of solubilizing the hard segment
Data Source
AI summary
A cosmetic composition containing at least one block copolymer having at least one hard segment and at least one soft segment, at least one tackifier component, at least one solvent capable of solubilizing the soft segment, and optionally, at least one colorant, and wherein the at least one hard segment has a Tg of about 50 °C or more and the at least one soft segment has a Tg value of about 20 °C or less. It also relates to the use of this composition as a top-coat composition in a method of making-up a keratinous substrate involving: (a) providing a keratinous substrate; (b) applying a basecoat composition onto the keratinous substrate, the basecoat composition comprising: (i) at least one polyorganosiloxane containing polymer, (ii) at least one silicone film former; (iii) at least one volatile oil; and (iv) at least one colorant; and (c) applying said topcoat composition over top of the basecoat composition.