Abstract:
PURPOSE: A method for preparing lipid-coated hydrogel particles is provided to prevent reduction of sealing efficiency of a drug. CONSTITUTION: A method for preparing lipid-coated hydrogel particles comprises: a step of preparing hydrogel particles using water soluble polymers and water soluble crosslinking agent; a step of dissolving the lipid in organic solvent; a step of dispersing the hydrogel particles to the organic solvent; and a step of adding water to the dispersed liquid and performing reduced pressure distillation. The organic solvent is main organic solvent or alcohol of C1-C6.
Abstract:
PURPOSE: A cosmetic composition for skin whitening is provided to suppress melanogenesis and to prevent skin pigmentation. CONSTITUTION: A cosmetic composition for skin whitening contains pfaffia glomerata root juice and arginine PCA as active ingredients. The composition futher contains ascorbic glycoside, glycyrrhiza extract, arbutin, ascorbic acid, or kojic acid. The pfaffia glomerata root juice is contained in 0.00001-1.0 weight%. The arginine PCA is contained in 0.00001-1.0 weight%.
Abstract:
PURPOSE: A cosmetic composition which enhances skin rebirth is provided to enhance cell activation and to improve anti-wrinkle and elasticity. CONSTITUTION: A skin cosmetic composition contains 0.1-10 weight% of octacosanol and 0.1-30 weight% of Lepidium meyenii extract as an active ingredient. The octacosanol and Lepidium meyenii extract is mixed in a weight ratio of 1-9:9-1. The Lepidium meyenii extract is isolated using ethanol. The cosmetic composition is used in the form of skin, lotion, massage cream, nutrition cream, pack, gel, or ointment, patch, or spray.
Abstract:
PURPOSE: A cosmetic composition for anti-aging is provided to protect skin from metal stress, external stress, and toxic factor and to activate skin cell regeneration. CONSTITUTION: A cosmetic composition for anti-aging contains 0.00001-1.0 weight% of pfaffia glomerata root juice and 0.00001-1.0 weight% of arginine PCA. The composition further contains 0.00001-10 weight% of oleanolic acid, ursolic acid, betacarotene, or retinol.
Abstract:
A polymer-liposome complex with various hydrophobic physiological materials solubilized by hydroxypropyl-beta-cyclodextrin is provided to secure the skin absorption promoting effect and the titer decrease preventing effect of a hydrophobic physiological active ingredient by supporting the hydrophobic physiological active ingredient in an inner aqueous phase of the complex using hydroxypropyl-beta-cyclodextrin. A polymer-liposome complex is characterized in that it comprises a liposome structure including a poly(methacrylic acid-co-n-alkyl methacrylate) random copolymer represented by the formula(1)(wherein n is from 11 to 22, and the molar ratio of x:y is 85:15-70:30) and a lipid layer, and a hydrophobic physiological active ingredient solubilized by hydroxypropyl-beta-cyclodextrin is supported at the inner phase of the liposome structure. The method comprises the steps of: (a) mixing the copolymer of the formula(1) and lipid with water and dissolving it with heating at a temperature of 50-70 deg.C; (b) mixing hydroxypropyl-beta-cyclodextrin and a hydrophobic physiological active ingredient with water and heating it at a temperature of 60-70 deg.C with solubilizing the hydrophobic physiological active ingredient using an emulsifier; (c) adjusting the pH of the solution obtained from the step(b) with an acid or a base to more than 7; (d) mixing the mixture solution obtained from the step(a) with the aqueous solution of the step(c) heated at a temperature of 50-70 deg.C and firstly dispersing it using an emulsifier; (e) nano-granulating the mixture solution obtained from the step(d) using a high pressure emulsifier; and (f) removing organic solvent used from the mixture solution obtained from the step(e) using a rotary evaporator.
Abstract:
본 발명은 산성도 민감성 고분자를 이용한 고분자-리포좀 나노복합체의 제조와 이를 함유하는 피부 외용제 조성물에 관한 것으로, 구체적으로는 메타아크릴산과 n-알킬 메타아크릴레이트로 구성된 산성도 민감성 고분자, 지질 및 콜레스테롤을 사용하여 제조한 고분자-리포좀 나노복합체 또는 나노에멀젼으로서 산성도 변화에 대하여 민감한 감응성을 가지고 있어 내상에 함입되는 생리활성 성분을 생체 내에서 효과적으로 방출하여 전달체로서의 효과를 증진시킬 수 있을 뿐 아니라 종래의 지질 기반으로 제조된 리포좀보다 수용액상 및 각종 염(salt)이 함유된 수용액 그리고 피부외용제 조성물 및 화장품 제형 내에서도 안정하게 존재하도록 설계된 고분자-지질기반 약물전달체 및 피부외용제 조성물에 관한 것이다. 산성도 민감성 고분자, 고분자-리포좀 나노복합체, 리포좀, 나노에멀젼, 제형안정성