| 摘要 |
Polymer having original star structure, for use in preparations for treatment or make-up of keratin fibres, especially for h or as mascara for eyelashes. Polymer of star structure has formula: A-((M1)p1 - (M2)p2........(Mi)pj)n (I) A = multifunctional center; n = at least 2; ((M1)p1 - (M2)p2........(Mi)pj) = polymeric chain, identical or different, also named branch, consisting of polymerized monomers Mi, identical or different, and grafted in covalent manner on center A; p = polymerization indices; i = at least 2; pj = at least 2. Polymer comprises one or more monomers Mi whose correspondent homopolymer has Tg (glass transition temperature) at least 10 degrees C, preferably at least 20 degrees C, and whose minimum content in final polymer is 45 wt.%, preferably 75-95 wt.% per to wt. of monomers, and furthermore one or more monomers Mj whose correspondent homopolymer has Tg up to 10 degrees C, preferably u 0 degrees C, and whose maximum content in final polymer is up to 55 wt.%, preferably 5-25 wt.% per total wt. of monomers. Independent claims are also included for: (1) cosmetic composition for use on eyelashes or hair, comprising at least one polymer as claimed, in respective cosmetical acceptable medium, in amount 1-99 (preferably 2-30) wt.%, in form of solution or dispersion in aqueous, organic, or hydro organi (especially alcoholic or hydro alcoholic) phase, with composition additionally containing film-forming agent, such as plasticize and/or coalescing agent, and having form of water/oil or oil/water or multiple emulsion, aqueous, solvent or oily dispersion, aqueous, hydro alcoholic oily or solvent solutions, aqueous or oily gels or micro-emulsions; (2) process of cosmetic treatment of keratin fibers, namely eyelashes and/or hair, comprising application of composition as claimed; and 3) the use of polymer as claimed in cosmetic composition applied onto eyelashes to improve their turning-up curve. |
