Abstract: This invention relates to a process for preparing tetrafluoroethyloxyalkyl silanes by the addition of silanes containing Si-bonded hydrogen to tetrafluoroethyl-alkenylether in a tubular reactor in which the reaction mixture containing an excess of silanes is recycled at a rate of at least 10 meters per minute.

Abstract: Addition to organosilicon compounds having at least one alkyl group attached to a silicon atom, at least one hydrogen atom being attached to the carbon atom adjacent the silicon atom, of a fluorocompound, which may be a fluoroolefin, a perfluoroketone, or a perfluoroether having a carbon-carbon double bond in .alpha.-position to the ether oxygen atom, give fluorine-containing organosilicon compounds. These adducts may be liquid or solid and are useful as (1) lubricants and sealants for automotive and aerospace industries (2) fire-resistant hydraulic fluids, and (3) siloxane elastomers having good oil and lubricant resistance.

Abstract: Addition to organosilicon compounds having at least one alkyl group attached to a silicon atom, at least one hydrogen atom being attached to the carbon atom adjacent the silicon atom, of a fluorocompound, which may be a fluoroolefin.[., a perfluoroketone,.]. or a perfluoroether having a carbon-carbon double bond in .alpha.-position to the ether oxygen atom, give fluorine-containing organosilicon compounds. These adducts may be liquid or solid and are useful as (1) lubricants and sealants for automotive and aerospace industries (2) fire-resistant hydraulic fluids, and (3) siloxane elastomers having good oil and lubricant resistance.