Suzuta K.,Milbon Co.
Journal of cosmetic science | Year: 2012
Permanent wave treatment for hair has been used for many decades. However, certain aspects of the treatment involved are still not well understood. Reduction of disulfide (SS) bonds and their subsequent oxidation are essential for inhibiting fiber degradation. We attempted to elucidate scission and reformation mechanisms of SS cross-links by treating them with a reducing agent, thioglycolic acid (TGA), and an oxidizing agent, sodium bromate. In order to estimate the change in the cross-link density of hair before and after treatment, a rubber elasticity theory was applied to the force-extension curve for rubber-like swollen hair fibers treated in a specific diluent mixture. A two-phase structural model was assumed that corresponds to the globular matrix of keratin-associated proteins (KAP) dispersed in a swollen network of intermediate filament (IF) proteins. Important structural parameters were obtained by fitting the force-extension curve to the theoretically derived relationship between elastic forces originating from the non-uniform network and extension ratios. The three parameters extracted are the number of intermolecular SS bonds in IF, the volume fraction of matrix protein in the fiber, and the shape of the matrix domain. It was found that TGA attack on the SS bonds between globular matrix proteins occurs preferentially as compared with those between IF proteins and induces the shape change of the matrix domain from an ellipsoidal to a near-spherical form.
Milbon Co. | Date: 2015-01-15
Milbon Co. | Date: 2015-08-27
Hair care preparations; hair shampoos; hair rinses; shampoo-conditioners; non-medicated hair treatment preparations; hair conditioners; hair tonics for cosmetic use; hair creams; hair oils; hair styling preparations; hair wax; hair mousse; hair sprays and hair gels; non-medicated hair balms; hair bleaching preparations; hair coloring preparations; hair mascara; hair curling preparations; hair straightening preparations.
Milbon Co. | Date: 2014-06-06
Hair care preparations, namely, hair shampoos, hair treatments, hair lotions, hair creams, hair nourishes, hair tonics, scalp treatment preparations.
Milbon Co. | Date: 2015-01-20
Provided is a composition in which the dispersibility of a specific modified peptide is less likely to decrease at a pH of less than 7.0. The cosmetic composition contains a modified peptide having one or more side chain groups including one or more units selected from the group consisting of a structure represented by formula (Ia): SS(CH