5833-47-6Relevant articles and documents
Process for producing aromatic hydroxy compound
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, (2008/06/13)
A process for producing an aromatic hydroxy compound having hydroxyl group at the para-position with respect to a hydroxy or an alkoxy substituent group present in the aromatic ring at a high yield and at a high selectivity, using a novel and useful hydroxylation catalyst which can afford to introduce hydroxyl group directly into aromatic ring at the para-position with respect to a hydroxy or an alkoxy substituent group, by reacting at least one compound selected from the group consisting of phenols, alkoxybenzenes and derivatives of them with hydrogen peroxide in the presence of the catalyst, wherein the hydroxylation catalyst is constituted of an oleophilized crystalline titanosilicate.
Organopolysiloxane emulsion composition
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, (2008/06/13)
An organopolysiloxane emulsion composition comprising: a silicone emulsifying agent comprising a compound represented by the general formula (I): STR1 wherein a plurality of R1 may be the same or different and each represent a substituted or unsubstituted monovalent hydrocarbon group having 1 to 20 carbon atoms; R2 represents a divalent hydrocarbon group having 1 to 6 carbon atoms; R3 represents an atom or group selected from the group consisting of a hydrogen atom, an acetyl group, R1, and --Si(R1)3 ; A represents a divalent hydrocarbon group having 1 to 4 carbon atoms; and x and y are numbers of 5≤x≤50 and 1≤y≤100, respectively; an organopolysiloxane which is liquid at room temperature; and water. This emulsion composition can be prepared as either w/o emulsion or o/w emulsion with good stability.
SYNTHESIS OF (ACYLOXYBUTYL)DIMETHYLCHLOROSILANES, BIS(ACYLOXYBUTYL)TETRAMETHYLDISILOXANES, AND THEIR DERIVATIVES
Volkova, L. M.,Makarova, N. N.,Lyakhovetskii, Yu. I.
, p. 1515 - 1518 (2007/10/02)
New bis(acyloxybutyl)tetramethyldisiloxanes and (acyloxybutyl)dimethylchlorosilanes were prepared by reactions of 2,2-dimethyl-1-oxa-2-silacyclohexane with valeric, heptanoic, thioacetic, p-nitrobenzoic, and p-bromobenzoic acids and the corresponding acyl chlorides.Bis(p-aminobenzoyloxybutyl)tetramethyldisiloxane was formed by the reduction of bis(p-nitrobenzoyloxybutyl)tetramethyldisiloxane with hydrazine hydrate.The corresponding methacroyloxy derivatives were isolated by the condensation of (methacroyloxybutyl)dimethylchlorosilane with 2-hydroxy-2,4,4,6,6,8,8-heptamethylcyclotetrasiloxane or 2-hydroxy-4,4,6,6,8,8,10,10,12,12-undecamethylcyclohexasiloxane.The mass spectra of these compounds are given.