摘要:
A composition for dyeing keratinous fiber which includes incorporated therein an oxidative color-developing substance, an enzyme which reacts with oxygen as a substrate but does not evolve hydrogen peroxide, and a weak reducing agent.
摘要:
A brush of the anchor type capable of varying an anchor driven angle as desired, to thereby realize bristle setting at an increased packing density and in any desired pattern. Anchor driven angles (θ) at which at least two anchors (95) are driven into bristle set holes (4) of a head (2) of the brush are set to be different from each other. A bristle setting apparatus for realizing such a brush includes a bristle setting mechanism (82) using the anchor, an X-Y-Z table mechanism (11) arranged opposite to the bristle setting mechanism, and a brush rotating mechanism (12) rotatably arranged on the table mechanism. The brush rotating mechanism (12) is constituted of a brush holder (16) arranged so as to be rotatable in both normal and reverse directions and constructed so as to clampedly hold the head (2) of a toothbrush handle (1) at a predetermined position, a servomotor (17) for rotating the brush holder in both normal and reverse directions, gears (20, 21), and a drive belt (22). Control of movement and rotation of the X-Y-Z table mechanism (11) and brush holder (16) permits a rotational inclination angle of the toothbrush handle (1) held on the brush holder (16) to be varied as desired.
摘要:
An oxidative hairdye composition of a single preparation type containing an oxidase and a process for producing the same, characterized in that, (i) the composition is filled in a container in such a state that the oxygen concentration at the headspace is made 1 % by weight or less or (ii) a mixing operation of the components containing the oxidase is carried out in the absence of oxygen and the filling of the resulting composition into the container is carried out in the absence of oxygen.
摘要:
The present invention provides an alkoxylation solid catalyst with which an alkylene oxide adduct having a narrow adduct distribution can be produced while inhibiting formation of high molecular weight polyalkylene glycol having a molecular weight of about tens of thousands as a by-product. The alkoxylation catalyst comprises a metal oxide containing magnesium, aluminum, and at least one metal selected from the metals that belong to group VIA, group VIIA, and group VIII.
摘要:
A method of producing alkylene oxide adduct comprises reacting an organic compound having one or more active hydrogen (for example, higher alcohol, amine, etc.) with alkylene oxide in the presence of an Al · Mg composite oxide catalyst. The catalyst can be obtained by calcining and activating aluminum magnesium hydroxide shown by nMgO · Al 2 O 3 · mH 2 O. In this method, a highly active reaction can be performed, and alkylene oxide adduct having very narrow alkylene oxide adduct molar distribution can be obtained. Since the load in a catalyst separating step is reduced, the catalyst can be efficiently separated. Therefore, the alkylene oxide adduct can be produced at low cost. In addition, the reaction can be performed at high speed, and the reaction time can be reduced.