3663-50-1Relevant articles and documents
METHOD FOR MANUFACTURING STRAIGHT-CHAIN TRISILOXANE COMPOUND
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Paragraph 0026-0030; 0033; 0034, (2018/08/28)
PROBLEM TO BE SOLVED: To provide a method for manufacturing straight-chain trisiloxane having hydroxyl group at one of both ends of a molecular chain and hydroxyl group or alkoxy group at the other end, with a high yield and a simple process by using an easily obtainable cyclic trisiloxane as a raw material. SOLUTION: A desired trisiloxane compound is manufacturable by allowing various cyclic trisiloxanes to react with water or alcohol in the presence of hydrogen gas and/or hydrogen generating agent, and a transition metal catalyst. SELECTED DRAWING: None COPYRIGHT: (C)2016,JPOandINPIT
Hydrolysis of oligodimethylsiloxane-α,ω-diols and the position of hydrolytic equilibrium
Spivack,Dorn
, p. 2345 - 2352 (2007/10/03)
The hydrolysis of tetramethyldisiloxane-1,3-diol and hexamethyltrisiloxane-1,5-diol in aqueous solutions has been studied. The position of equilibrium of the system including these compounds, dimethylsilanediol, and water has been determined. Concentrations of these compounds in dilute aqueous solutions were determined by coupling HPLC to ICP analysis for Si and also by extraction into ethyl acetate followed by triethylsilylation and GC analysis. It was found that the siloxanediols hydrolyze to the equilibrium mixture at environmentally significant rates and that dimethylsilanediol dominates the equilibrium in dilute aqueous solution, even at concentrations orders of magnitude above that expected in the environment. The hydrolysis of tetramethyldisiloxane-1,3-diol in water was found to be first order in [H+] and in [phosphate buffer] by studying the rates at pH 3 and 6. The hydrolysis of a mixture of higher oligodimethylsiloxane-α,ω-diols as a suspension in water is also described. The first observation of dimethylsilanediol in an environmental sample is reported. The hydrolysis of tetramethyldisiloxane-1,3-diol and hexamethyltrisiloxane-1,5-diol in aqueous solutions has been studied. The position of equilibrium of the system including these compounds, dimethylsilanediol, and water has been determined. Concentrations of these compounds in dilute aqueous solutions were determined by coupling HPLC to ICP analysis for Si and also by extraction into ethyl acetate followed by triethylsilylation and GC analysis. It was found that the siloxanediols hydrolyze to the equilibrium mixture at environmentally significant rates and that dimethylsilanediol dominates the equilibrium in dilute aqueous solution, even at concentrations orders of magnitude above that expected in the environment. The hydrolysis of tetramethyldisiloxane-1,3-diol in water was found to be first order in [H+] and in [phosphate buffer] by studying the rates at pH 3 and 6. The hydrolysis of a mixture of higher oligodimethylsiloxane-α,ω-diols as a suspension in water is also described. The first observation of dimethylsilanediol in an environmental sample is reported.
Novel n[meth)allyloxy(meth)allylphenyl]maleimides and thermosetting imido copolymers prepared therefrom
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, (2008/06/13)
Novel N-[(meth)allyloxy-mono-/di(meth)allylphenyl]maleimides, in admixture with at least one N-[(meth)allyloxyphenyl]maleimide, are reacted with at least one bismaleimide, and optionally a hydroxylated organosilicon compound, in the presence of an imidazole compound, to obtain mechanically improved thermosetting imido copolymerizates well adapted for the production of, e.g., coatings, adhesive bondings, laminates and composites.