Hair conditioning composition containing film forming gradient copolymer, airsol composition containing the same hair care composition and treatment method

A technology of gradient copolymer and composition, applied in the field of hair cosmetic composition, can solve the problems of high polydispersity, composition layering, insolubility and the like

Inactive Publication Date: 2004-06-23
LOREAL SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Indeed, even if they contain hydrophilic units, there is the disadvantage of high compositional polydispersity, meaning that some polymer chains include the hydrophilic units necessary for dissolution, but others do not and therefore cannot soluble in hydrophilic media
The result is delamination problems within the composition

Method used

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  • Hair conditioning composition containing film forming gradient copolymer, airsol composition containing the same hair care composition and treatment method
  • Hair conditioning composition containing film forming gradient copolymer, airsol composition containing the same hair care composition and treatment method
  • Hair conditioning composition containing film forming gradient copolymer, airsol composition containing the same hair care composition and treatment method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0357] Embodiment 1: the bulk synthesis of gradient copolymer

[0358] The reactant mixture is as follows:

[0359] -MONAMS: 3.0g

[0360] -SG1: 0.18g

[0361] - Ethyl acrylate: 480 g i.e. 80% by weight / total monomer weight

[0362] - Styrene: 60 g i.e. 10% by weight / total monomer weight

[0363] -Methacrylic acid: 60 g i.e. 10% by weight / total monomer weight

[0364] All ingredients were mixed together under nitrogen atmosphere without adding solvent, then it was heated and kept at temperature 110-115° C. for 198 min. The reaction was terminated when the conversion reached 60%.

[0365] Gradients were calculated by the simulation method, and the curves shown below were obtained. Theoretical predictions indicated a 30% incorporation of the mixture (styrene / methacrylic acid) and 70% ethyl acrylate.

[0366] The reliability of the model was verified by monitoring the relative concentrations of the three monomers by gas chromatography and polymer NMR analysis.

[0367] W...

Embodiment 2

[0378] Example 2: Bulk synthesis of gradient copolymers

[0379] Following the individual steps described in Example 1, various copolymers were prepared from the following reactant mixtures:

[0380] -MONAMS: 3.0g

[0381] -SG1: 0.18g

[0382] - Styrene: 60g

[0383] -Methacrylic acid: 60g

[0384]

Embodiment 3

[0385] Embodiment 3: Carry out synthesis in the presence of solvent

[0386] Synthesis was carried out as in Example 1 except that solvent was present. The reactant mixture is as follows:

[0387] -MONAMS: 3.43g

[0388] -SG1: 0.2g

[0389] - Ethyl acrylate: 336g

[0390] - Styrene: 42g

[0391] -Methacrylic acid: 42g

[0392] -Toluene: 180g

[0393] All ingredients were mixed together in toluene as solvent under nitrogen atmosphere, then it was heated and kept at temperature 110-115° C. for 198 min.

[0394] The final conversion was 82%, while the obtained solids content was 57.2% by weight.

[0395] The following analysis results were obtained:

[0396] Mn = 30570 g / mol, Mw = 50500 g / mol and Ip = 1.65. The composition dispersity (or w) was 2.0.

[0397] The final composition of the copolymer was analyzed by liquid adsorption chromatography (LAC), and the results showed that it was similar in composition to the copolymer prepared in Example 1, and there was no hom...

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Abstract

A hair-cosmetic composition comprising, in a cosmetically acceptable medium, at least one film-forming gradient copolymer comprising at least two different monomeric residues, and displaying a mass polydispersity index (Ip) less than or equal to 2.5, wherein the composition is able to form a film that has a strain at break epsilonr ranging from 5% to 2500%, and/or a Young's modulus ranging from 0.5 to 1200 Mpa, and/or an instantaneous elastic recovery epsiloni greater than or equal to 10%. An aerosol composition packaged in an aerosol device, comprising a propellant and a haircare composition as defined above, and also a method for treating the hair, such as a styling method, comprising applying the haircare composition or the aerosol composition above to the hair.

Description

technical field [0001] The present invention relates to novel hair cosmetic compositions comprising specific copolymers, especially amphiphilic gradient copolymers, which are preferably soluble or dispersible in water and / or organic solvents. Background technique [0002] Styling compositions packaged in the form of aerosol sprays generally contain a high proportion of alcohol. Cosmetics with high alcohol content are now subject to special regulation, especially in the United States, in response to growing public sensitivity in recent years to environmental concerns arising from the release of volatile organic products into the atmosphere. [0003] One way to reduce the alcohol content or even completely eliminate alcohol from the formulation is to replace it with an equivalent amount of water. However, the addition of large amounts of water to aerosol sprays for hair styling, such as spray lacquers, results in considerable deformation of the hair, which is harmful and also...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61K8/00A61K8/81A61K8/90A61K31/74A61Q5/00A61Q5/02A61Q5/06A61Q9/02A61Q19/00C08F293/00
CPCA61Q5/06C08F293/005A61K8/8152A61K2800/54A61K8/8117A61K8/90A61K31/74A61Q5/00
Inventor N·穆兰
Owner LOREAL SA
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