摘要:
The invention is directed to silylalkyl and silylaralkyl substituted cyclopentadienes which have a hydrolyzable group attached to the silicone atom, a process for their production and peroxide cross-linkable synthetic resin and rubber mixtures containing them.
摘要:
N,N'-disubstituted or N,N,N'- or N,N',N'-trisubstituted thioureas with additional organyloxysilyl function and tertiary amine function of the general formula ##STR1## These compounds are prepared as follows: a) Aminoorganylsilanes of the general formula ##STR2## are reacted in an organic, inert solvent with carbon disulfide, b) The dithiocarbamates formed thereby having the general formula: ##STR3## are isolated and combined with at least the equimolar amount of an amino compound of the general formulaH.sub.2 N--(CH.sub.2).sub.n --NR.sup.3.sub.2, this mixture is heated until the reaction is completed and the desired product is subsequently isolated.
摘要:
The invention is directed to silyl alkyl and silylaralkyl substituted cyclopentadienes which have a hydrolyzable group attached to the silicon atom, a process for their production and peroxide cross-linkable synthetic resin and rubber mixtures containing them.
摘要:
The invention is directed to a process for the production of sulfur containing organosilicon compounds by reaction of an oligosulfide obtained in the reaction solution from a hydrogen sulfide an alkali metal and sulfur with a haloalkylsilane.
摘要:
Aminoalkyl-substituted organopolysiloxane thioureas are disclosed which consist of the units ##STR1## whereby R.sup.1 stands for a group ##STR2## R.sup.5 is an alkylene grouping, R.sup.2 is equal to R.sup.1 or H, R.sup.3 is equal to R.sup.1 or H or a group (CH.sub.2).sub.n --N(R.sup.6).sub.2 (III) (in which n=1-6, R.sup.6 =H or an alkyl group with C.sub.1 -C.sub.5) and R.sup.4 =H or a group of the formula (III), whereby (I) contains at most 2 (III) groups and at most 2 (III) groups and the free valances of the oxygen atoms sitting on the silicon atom are saturated by silicon atoms of other (III) groups, optionally with the insertion of cross-linking agents containing Si, Ti or Zr. The compounds can be random copolycondensates, block copolycondensates or mixed copolycondensates in relation to the optionally present cross-linking agents. In addition, various methods of preparing the compounds are indicated. The compounds can be used especially for the removal of dissolved metals from aqueous or organic phases.
摘要:
The invention is relative to optionally cross-linked organopolysiloxane urea derivatives and thiourea derivatives consisting of: ##STR1## wherein X stands for 0 or S andR.sup.1 is a group of the formula: ##STR2## in which R.sup.5 is alkylene with 1 to 10 C atoms or cycloalkylene with 5 to 8 C atoms or a group of the formula: ##STR3## with n=1-6 (on the nitrogen)m=0-6 (on the silicon), wherein R.sup.2 has the same meaning as R.sup.1 or stands for H, R.sup.3 and R.sup.4 have the same meaning as R.sup.1 or stands for H or alkyl with 1 to 5 C atoms. At least two but at the most three groups according to formula (2) are bound to the units according to formula (1). The free valances of the oxygen atoms bound to the silicon atom are saturated by silicon atoms of further groups of formula (2) with the optional inclusion of cross-linking agents. In addition, preparative methods for the products and a use for the removal of dissolved metals from liquid phases are indicated.
摘要:
A process for producing carboxylic acid esters by the following steps:a) preparation of a reaction mixture containing an alcohol and a carboxylic acid and/or a carboxylic anhydride and/or a carboxylic acid ester and or a partially esterified carboxylic acid,b) heating of this mixture to the suitable reaction temperature in the presence of a solid polysiloxane insoluble in the reaction medium and having sulphonic acid groups with intensive thorough mixing accompanied by continuous separation of the reaction water which forms, wherein the polysiloxane used as the catalyst in modified by treatment with a soluble aluminum, titanium or zirconium compound, and the spherical particles thereof have a diameter of 0.01 to 3 mm, a specific surface of 0.1 to 1200 m.sup.2 /g, a specific pore volume of 0.01 to 6.0 ml/g and a bulk density of 50 to 1000 g/l.
摘要:
Disclosed are shell catalysts which contain, on powdered or shaped supports, one or more metals from groups VIII and IB of the Periodic Table of Elements. The catalysts are obtained by coating the support with the catalytically active metals in aqueous solutions of mono- or bimetallic colloids of these metals, wherein the colloids are stabilized by highly hydrophilic surfactants.
摘要:
Disclosed are aqueous solutions of polymeric organosiloxane-ammonium compounds which possess ion exchange properties and a method for manufacture from solid organopolysiloxanes. The solutions are used in the hydrophobing treatment of inorganic materials and building materials.
摘要:
A process is described for the hydrided of halogen-substituted compounds of the second to fourth period of Groups III to V of the periodic system, with the exception of gallium, aluminum, carbon, or nitrogen. A finely-granulated aluminum is added to a molten salt melt that consists of 50-67 molar % AlCl.sub.3 (anhydrous) and 50 to 33 molar % of sodium chloride. Then to the stirred, or by some other means dispersed suspension, hydrogen is introduced to hydrided the finely-dispersed aluminum. Thereafter the mixture is reacted with the halogen-substituted compound and the resulting hydrided compound is renewed.