Abstract: Organosilicon aldehydes and ketones are prepared by a method in which an organosilicon compound containing ozonide functionality is first formed by exposing an organosilicon compound containing unsaturation to ozone. The organosilicon compound containing ozonide functionality is then reduced to the corresponding organosilicon aldehyde or ketone with a reducing agent. One preferred reducing agent is a combination of zinc and acetic acid. Complete conversion of the ozonide to the carbonyl (.dbd.C.dbd.O) compound is obtained when the ozonide containing the reducing agent is heated briefly to about 30.degree. C.

Abstract: A method for the preparation of tertiary-hydrocarbylsilyl compounds. The method comprises contacting a mixture comprising diethylene glycol dibutyl ether, and a Grignard reagent described by formula RMgX with a silicon compound described by formula R.sup.1.sub.a SiX.sub.4-a, where R is a tertiary-hydrocarbyl group comprising four to about 20 carbon atoms, each R.sup.1 is an independently selected substituted or unsubstituted monovalent hydrocarbon group comprising one to about 20 carbon atoms, each X is an independently selected halogen atom, and a is an integer with a value of zero to three, in the presence of an effective amount of a copper compound catalyst. The present invention provides a method for making sterically hindered organosilicon intermediates useful in the pharmaceutical industry.

Abstract: A method of manufacturing block copolymers containing a polyorganosiloxane segment, by dual polymerization involving (i) polycondensation of a silicone block followed by (ii) the free radical polymerization of a monomer that can be polymerized by free radical polymerization, such as a vinyl containing organic monomer. Initiation of free radical polymerization in step (ii) is carried out with a carbonyl functional group attached to the silicone polymer block. The carbonyl functional silicone polymer, preferably an aldehyde functional silicone polymer, is included as one component of a copper-based Redox initiating system. The method ensures no free homopolymerization, complete reactivity, and various polymer architectures are possible, including for example, polymeric structures such as AB, ABA, (AB).sub.n, brush, and radiant types. The method is fast, effective, convenient, and easier to control than typical ionic polymerization techniques.

Abstract: A method in which radical polymerization of a vinyl monomer is initiated by an ozonide group attached to a silane or a siloxane polymer. The method is particularly useful for preparing organic polymers having a silicone chain end, or for preparing wide ranges of silicone/organic polymers and copolymers with varied architecture, i.e., ABA block copolymers, comb polymers, star polymers, and hyper-branched polymers. In one embodiment, the method is carried out by simply heating a vinyl monomer in the presence of a silane containing ozonide functionality. The ozonide silane is obtained by exposing silanes or siloxanes having an alkyl group containing a double bond to ozone. Surprisingly, an ozonide attached to an organosilicon compound was found to be stable, and capable of initiating vinyl polymerization upon heating to moderate temperatures, i.e., about 70.degree. C.

Abstract: A method for preparation of alkenylsilanes comprising contacting magnesium metal with a mixture comprising diethylene glycol dibutyl ether, an alkenyl halide, and a halosilane at a temperature within a range of about 5.degree. C. to 200.degree. C. The method provides a high yield of alkenylsilane product that is easily recoverable and also provides for high ratios of alkenylsilane to diethylene glycol dibutyl ether.

Abstract: Polysiloxanes having pendant and/or telechelic carbonyl functionality, i.e., aldehyde functionality .tbd.Si--R--CH.dbd.O or ketone functionality .tbd.Si--R--CR.dbd.O, are manufactured in high yield by ozonolysis of polydiorganosiloxanes containing alkenyl groups, followed by treatment with a reducing agent such as zinc and acetic acid. The process is relatively fast and economical using readily available starting materials such as hexenyl-functional polymers. In particular, aldehyde functionality on the polymer can be used as a polymeric crosslinking agent.

Abstract: A method in which radical polymerization of a vinyl monomer is initiated by an ozonide group attached to a silane or a siloxane polymer. The method is particularly useful for preparing organic polymers having a silicone chain end, or for preparing wide ranges of silicone/organic polymers and copolymers with varied architecture, i.e., ABA block copolymers, comb polymers, star polymers, and hyper-branched polymers. In one embodiment, the method is carried out by simply heating a vinyl monomer in the presence of a silane containing ozonide functionality. The ozonide silane is obtained by exposing silanes or siloxanes having an alkyl group containing a double bond to ozone. Surprisingly, an ozonide attached to an organosilicon compound was found to be stable, and capable of initiating vinyl polymerization upon heating to moderate temperatures, i.e., about 70.degree. C.

Abstract: This invention relates to a process for the manufacture of a silane or polyorganosiloxane containing a cycloalkyl substituent by hydrogenation of a silane or polyorganosiloxane containing at least one aromatic hydrocarbon substituent in the presence of a Raney nickel catalyst without a solvent.