A cosmetic containing (A) an organo(poly)siloxane shown by the following general formula (1). A cosmetic with a refreshing feeling, smooth spreadability as well as high stability and favorable cosmetic sustainability is provided.
[where, in the formula, R
1
represents a group except shown by the formula (2), selected from a C1-C20 alkyl group and a C6-C20 aryl group; n represents an integer of 0 to 3; R
2
and R
3
represent R
1
or the formula (2); and either or both of R
2
and R
3
represent formula (2),
(where, in the formula, X represents a C2-C20 alkylene group; and Y represents any one of a hydrogen atom, a C1-C20 alkyl group, a C6-C20 aryl group, a C7-C40 aralkyl group, a C1-C20 alkyloxy group, a C6-C20 aryloxy group, a C7-C40 arylalkyloxy group, and a halogen atom.)]
Synthesis of photoresponsive cyclic poly(dimethyl siloxane)s from monodisperse linear precursors
作者:Minami Oka、Satoshi Honda
DOI:10.1016/j.reactfunctpolym.2020.104800
日期:2021.1
area, synthesis of well-defined functional poly(dimethyl siloxane) (PDMS) with nonlinear macromolecular architectures is indispensable for finding next-generation applications. Here we report the synthesis of cyclic PDMS (C) with photocleavable and reformable hexaarylbiimidazole (HABI)-derived covalent bonds in the main chain from triphenylimidadole (lophine) end-functionalized monodisperse linear precursors
The invention relates to a method for producing hydridosilanes, in which siloxanes containing Si—H groups are reacted in the presence of a cationic Si(II) compound as a catalyst.
Effect of catalyst structure on the reaction of α-methylstyrene with 1,1,3,3-tetramethyldisiloxane
作者:D. A. de Vekki、N. K. Skvortsov
DOI:10.1134/s107036320904015x
日期:2009.4
Reaction of α-methylstyrene with 1,1,3,3-tetramethyldisiloxane in the presence of the complexes of platinum(II), palladium(II) and rhodium(I) is explored. It is established that in the presence of platinum catalyst predominantly occurs hydrosilylation of α-methylstyrene leading to formation of β-adduct, on palladium catalysts proceeds reduction of α-methylstyrene, on rhodium catalysts both the processes