摘要:
A method for the high-purity synthesis of a diorganopolysiloxane having a functional group at only one molecular chain terminal, that is characterized by the preliminary silylation with a silylating agent of the silanol group-containing impurity present in the cyclic trisiloxane, and that is characterized by preliminarily converting the silanol group-containing impurity in the cyclic trisiloxane into a lithiated material by lithiation with an organolithium compound and then silylating this lithiated material using a silylating agent that contains silicon-bonded halogen.
摘要:
The presence in curable, foamable organosiloxane compositions of an organosiloxane containing at least one diphenylsiloxane unit, a triorganosiloxane unit and a silanol group imparts a high expansion ratio, an excellent moldability, and an excellent storage stability, and that is not subject to post-cure whitening.
摘要:
The present invention provides an organohydrogenpolysiloxane which does not have an average chemical structure as encountered with organopolysiloxanes prepared by equilibration polymerization reactions, but rather which has a clear, defined chemical structure in which the position and number of silicon-bonded hydrogen groups is clearly defined. The organopolysiloxane has a branched structure in the vicinity of one terminal of the molecular chain and has the silicon-bonded hydrogen group at each of the resulting derivative terminals. The organopolysiloxanes can be addition-reacted with, for example, organic compounds having various functional groups to give organopolysiloxane having two organofunctional groups clustered at one terminal.
摘要:
A signal whose frequency is proportional to a rotational speed of a rotor and whose rising and falling angles near points crossing zero becomes larger with the rotational speed of the rotor is used to produce a first signal of amplitude corresponding to the rising and falling angles and a second signal of amplitude corresponding to the frequency, a difference between the first and second signals is evaluated, and the first or second signals are corrected with the difference.
摘要:
The present invention provides a gel composition having improved texture in use. A gel composition consisting of an organosiloxane derivative represented by the following formula (1) or (3), a monohydric aliphatic alcohol having 10 to 30 carbon atoms, and water.
摘要:
The present invention provides a novel modified-polysiloxane, method for producing the same, and a cosmetic containing the same. The aforementioned modified-polysiloxane exhibits a reduced viscosity and superior operationability as compared with conventional polyoxyalkylene-modified polysiloxanes and polyglycerol-modified polysiloxanes. In addition, since the modified-polysiloxane is hardly oxidized in air, hardly produce allergenic compounds such as formates, and aldehydes such as formaldehyde, during storage over time, an increased environmental compatibility can be exhibited. In addition, the modified-polysiloxane of the present invention exhibits a reduced hydrolysis property and is stable. In the modified-polysiloxane of the present invention, the terminal hydroxyl groups of a polyglycerol-modified polysiloxane are partially blocked with hydrocarbon groups.
摘要:
The present invention provides a cleanser which is excellent in both of the foaming property and the cleansing capability. The cleanser comprises an organosiloxane derivative salt represented by the following formula (1) or (3) and one or more anionic surfactants selected from a group consisting of carboxylate salt with an alkyl group having 10 to 20 carbon atoms, sulfate salt with an alkyl group having 10 to 20 carbon atoms, sulfonate salt with an alkyl group having 10 to 20 carbon atoms, and phosphate salt with an alkyl group having 10 to 20 carbon atoms.
摘要:
Polyether represented by R(—O—Xn—Zm—Y)p {R is a monovalent hydrocarbyl group that contains no more than 20 carbon atoms and that may contain an aliphatically unsaturated bond or is a group comprising the preceding group having an ether linkage therein; n is 1 to 200; m is 0 to 200; 0
摘要:
A stable emulsion cosmetic having an excellent texture in use, and in particular, a solid emulsion cosmetic which is stable in a system containing a large amount of water is provided. The complex consists of an organosiloxane derivative represented by the following formula (1) or (2) and an amphoteric surfactant and/or semipolar surfactant.
摘要:
The present invention relates to an amino acid-modified organopolysiloxane emulsion obtainable by reacting (a) a carboxy-unprotected amino acid, and (b) organopolysiloxane having an epoxy group in the molecule in an aqueous medium in the presence of a surfactant, is incorporated in a cosmetic product. The present invention also relates to the simple and highly efficient production of emulsions of amino acid-modified polysiloxane, as well as the use of the emulsions as beautifying components.