Hyperbranched Copolymer Cosmetic Formulation for Reduced Material Transfer
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Solution Overview
Problem
Cosmetic compositions applied to the skin can transfer to other surfaces, causing contamination and staining, particularly fabrics and decorative or functional surfaces, which negatively affects their functionality and visual properties.
Innovation Solution
A cosmetic composition comprising a hyperbranched copolymer of dodecenyl succinic acid anhydride, diisopropanol amine, and bis-dimethylaminopropyl amine with specific terminal groups and oils of defined polarity indices, which significantly reduces material transfer to contacted surfaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If cosmetic composition is applied to skin for treatment and moisturizing, then skin care function is improved, but material transfer to other surfaces occurs causing contamination
Solution Approach 1:
The patent changes the chemical parameters of the cosmetic composition by incorporating a specific hyperbranched copolymer with defined molecular weight (1200-4000 g/mol) and specific terminal groups, combined with oils of specific polarity indices (50-30 mN/m or 18-5 mN/m). This parameter optimization reduces material transfer while maintaining skin care effectiveness.
Solution Approach 2:
The patent uses a composite material system consisting of a hyperbranched copolymer (made from dodecenyl succinic acid anhydride and diamine monomers) combined with specific oils. This composite structure provides both the desired skin care properties and reduced transfer characteristics that neither component could achieve alone.
2Reliability
If cosmetic composition is applied to skin, then moisturizing effect is achieved, but fabric staining occurs
Solution Approach 1:
The patent optimizes the polarity index parameter of the oil component (selecting oils with polarity indices of 50-30 mN/m or 18-5 mN/m) to reduce affinity with fabric surfaces while maintaining moisturizing performance on skin. The molecular weight parameter of the copolymer (1200-4000 g/mol) is also controlled to achieve appropriate transfer resistance.
3Reliability
If cosmetic composition is applied to skin, then protective function is provided, but contamination of decorative surfaces occurs
Solution Approach 1:
The patent adjusts the surface chemistry parameters of the cosmetic composition through the selection of hyperbranched copolymer with specific terminal groups and oils with controlled polarity indices. This creates a formulation that maintains protective function on skin while having reduced adhesion to decorative and functional surfaces.
4Reliability
If cosmetic composition is applied to skin, then treatment effect is achieved, but removal from skin occurs due to transfer
Solution Approach 1:
The patent optimizes the molecular weight parameter of the hyperbranched copolymer (1200-4000 g/mol) to achieve a balance between skin adherence for treatment effectiveness and resistance to transfer to other surfaces. This parameter control ensures the active ingredients remain on the skin rather than transferring away.
Data Source
AI summary
Cosmetic compositions are disclosed which comprise a hyperbranched copolymer of the monomers dodecenyl succinic acid anhydride, diisopropanol amine and bis-dimethylaminopropyl amine having quaternary terminal groups and an oil with a polarity index of either in the range of 50-30 mN/m or in the range of 18-5 mN/m. Material transfer of the cosmetic sun care composition from a skin surface to which the cosmetic sun care composition is applied to another surface contacted by the skin surface is substantially less as compared to an identical cosmetic sun care composition which does not comprise the hyperbranched copolymer.