| 摘要 |
The polymers having original star structure, for use in preparations for maintaining or fixing hairstyle, or for treatment of hair. Polymer of star structure can be described by 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 deg C, preferably at least 20 deg C, and whose content in final polymer is 55-95 wt.%, preferably 65-90 wt.% per total wt. of monomers, and furthermore one or more monomers Mj whose correspondent homopolymer has Tg up to 10 deg C, preferably up to 0 deg C, and whose content in final polymer is up to 5-45 wt.%, preferably 10-35 wt.% per total wt. of monomers. Independent claims are also included for: (1) cosmetic composition for treatment and/or fixing of hair, comprising at least one polymer as claimed, in respective cosmetically acceptable medium, in amount 1-95 (preferably 1-20) wt.%, in form of solution or dispersion in aqueous, organic, or hydro organic (especially alcoholic or hydro alcoholic) phase, with composition additionally containing film-forming agent, such as plasticizer, and/or coalescing agent, and having form of spray, varnish, mousse, cream, gel, emulsion, lotion or wax; (2) process of maintaining or styling of hair, comprising application of composition as claimed; and (3) the use of cosmetic composition as claimed for preparation of cosmetic product for hair and/or hair-styling product.
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