441307-02-4

Upstream product

• 18132-72-4 1,3-bis<3-chloropropyl>-1,1,3,3-tetramethyldisiloxane 
• 107-21-1 ethylene glycol 
• 24628-30-6 2-(2-propenyloxy)ethoxytrimethylsilane 
• 111-45-5 ethylene glycol monoallyl ether 
• 3277-26-7 1,1,3,3-Tetramethyldisiloxane 

Relevant academic research and scientific papers

Heteroatom-containing hydroxyalkyl disiloxane and preparation method and application thereof

The invention provides heteroatom-containing hydroxyalkyl disiloxane and a preparation method and application thereof. The preparation method comprises the steps of preparing a hydrolysis condensationproduct by using chlorosilane (II) as a starting material through a hydrolysis condensation reaction; and carrying out nucleophilic substitution or Williamson etherification reaction on a chloroalkylgroup in the hydrolysis condensation product and a mercapto group, an amine group or an alkoxide group in the hydroxyl compound (III) to obtain the heteroatom-containing hydroxyalkyl disiloxane. Thepreparation method is simple and convenient in steps, mild in reaction conditions, easy to realize and control in reaction conditions, short in preparation period, low in cost and high in target product yield and purity. The heteroatom-containing hydroxyalkyl disiloxane prepared by the preparation method disclosed by the invention can be used for preparing novel silicon-containing polymers such ashydroxyalkyl-terminated polysiloxane or organosilicon modified polyurethane (urea) or polyester, so that the material is endowed with better performance and wider application.

Synthesis and characterization of some bis(hydroxyalkyl)- and bis(hydroxyester)-functionalized disiloxanes

Novel hydroxyester disiloxanes (1,3-bis(6-hydroxyhexa noylmethyl)-1,1,3,3- tetramethyl disiloxane and 3-bis(2-hydroxypropanoylmethyl)tetramethyl disiloxane) were synthesized, and preparation of other known monomers, namely 1,3-bis(hydroxypropyl)-1,1,3,3-tetramethyl disiloxane, 1,3- bis(hydroxyethoxypropyl)-1,1,3,3-tetramethyl disiloxane and 1,3- bis(hydroxymethyl)-1,1,3,3-tetramethyl disiloxane was developed to obtain better yields and reduce production time and expense. All compounds were characterized by infrared spectroscopy, using 1H NMR, 13C NMR, and 29Si NMR and were reacted with diisocyanates, resulting in poly(siloxane-urethane) copolymers with unique properties.

Composition for separating mixtures

Therefore, there is provided herein in one specific embodiment a composition comprising: a) at least one silicone surfactant, and where silicone of silicone surfactant (a) has the general structure of: [in-line-formulae]Ma1Mb2Dc1Dd2Te1Tf2Qg; [/in-line-formulae][in-line-formulae]and, [/in-line-formulae][in-line-formulae]2≦(a+b+c+d+e+f+g)≦100; and, [/in-line-formulae] b) a mixture comprising an aqueous phase, a solid filler phase and optionally an oil phase that is substantially insoluble in said aqueous phase.