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AssigneeGulf Research & Development Company
InventorsAnatoli Onopchenko, Edward T. Sabourin
Estimating the term…
The silahydrocarbon product containing at least 75 weight percent of saturated silahydrocarbons with the remainder being unsaturated silahydrocarbons is produced by a process in which admixture comprising (A) at least one alpha-olefin containing from 2 to about 20 carbon atoms per molecule, and (B) at least one alkylsilane selected from the group consisting of (i) a dialkylsilane having the formula R--SiH.sub.2 --R.sub.1 (ii) a trialkylsilane having the formula ##STR1## and (iii) mixtures thereof, wherein R and R.sub.1, the same or different, each represent an alkyl radical of from one to 20 carbon atoms per molecule with a catalyst comprising a homogeneous rhodium-containing catalyst or a heterogeneous rhodium-containing catalyst in a halogen-free inert solvent, under hydrosilylation reaction conditions to produce a mixture containing saturated and unsaturated silane hydrocarbons useful as lubricants. The unsaturated silane hydrocarbons can be substituted with sulfur to provide improved lubricating characteristics.
A process for the production of a mixture of saturated and unsaturated silahydrocarbons which comprises contacting an admixture comprising
An unsaturated silahydrocarbon having the formula ##STR17## wherein R.sub.1 represents an alkyl group having from one to about 20 carbon atoms per molecule, R.sub.2 and R.sub.3 each represent the same or different alkyl groups having from 6 to about 20 carbon atoms per molecule, R.sub.4 represents an alkyl group having from one to about 8 carbon atoms per molecule, and n represents an integer from 0 to 4, inclusive with the proviso that the molecular weight of the unsaturated silane hydrocarbon is above 300.
A lubricating composition comprising (A) a minor amount of unsaturated silahydrocarbon having the formula ##STR19## wherein R.sub.1 represents an alkyl group having from one to about 20 carbon atoms per molecule, R.sub.2 and R.sub.3 each represent the same or different alkyl groups having from 6 to about 20 carbon atoms per molecule, R.sub.4 represents an alkyl group having from one to about 8 carbon atoms per molecule, and n represents an integer from 0 to 4, inclusive with the proviso that the molecular weight of the unsaturated silane hydrocarbon is above 300, and (B) a major amount of saturated hydrocarbon, saturated silahydrocarbon or mixtures thereof.
A lubricating composition additive having the formula ##STR20## wherein R.sub.1 represents an alkyl group having from one to about 20 carbon atoms per molecule, R.sub.2 and R.sub.3 each represent the same or different alkyl groups having from 6 to about 20 carbon atoms per molecule, R.sub.4 represents an alkyl group having from one to about 8 carbon atoms per molecule, n represents an integer from 0 to 4, Z and X each represent a sulfur moiety or hydrogen with the proviso that only one of Z or X represents a sulfur moiety while the other represents hydrogen.
Dependencies are inferred from the claim text.