R.t. Vanderbilt Company, Inc.

Vanderbilt Chemicals, LLC

Francis S Cheng

Ronald J Tepper

Gaston A Aguilar

Thomas J Karol

Steven G Donnelly

Kevin J Chase

Ronald J Hiza

A lubricating oil composition comprising a zinc dithiocarbamate fraction, for use in a gasoline or diesel engine equipped with fluoroelastomer seals, wherein said zinc dithiocarbamate fraction consists essentially of zinc dithiocarbamate molecules per Formula I: 

Zinc dithiocarbamate lubricating oil additives

Compositions comprising silicone fluids are formulated to provide improved metal-to-metal lubrication. Such Lubricating compositions comprise a major amount of (1) one or more siloxane polymer ('silicone fluids') selected from dimethyl siloxane polymers (also known as dimethyl silicone) and/or phenylmethyl dimethyl siloxane copolymers (also known as phenyl silicone), and lesser amounts of (2) synthetic and/or bio-based ester co-fluid, and (3) an alkoxylated aliphatic polyamine derivative. Unexpectedly, the compositions show a significant improvement in metal-to-metal lubrication, performing better than either the silicone fluids alone or and a combination of silicone with-ester and or silicone with-alkoxylated aliphatic polyamine combinations.

Silicone based lubricant compositions

Antimony dithiocarbamate is known to provide extreme pressure (EP) protection in lubricating compositions, such as grease. However, there is a desire to reduce the amount of antimony used in such compositions, while still maintaining acceptable EP performance. It has now been found by using small amounts of either ammonium dithiocarbamate or zinc dithiocarbamate in combination with the antimony dithiocarbamate (SbDTC), a lower amount of SbDTC can be used in the lubricating composition while still maintaining excellent or exceptional EP protection. To counteract the corrosive effects of the SbDTC and ammonium dithiocarbamate composition, it has been found that compounds containing a carboxylic acid group are effective in avoiding copper corrosion.

Lubricating greases containing antimony dithiocarbamates

The present invention relates to 1,3,4-thiadiazole reaction products useful as accelerators and/or curing agents for halogenated polymers in rubber vulcanization processes, and to halogenated polymer compositions containing the thiadiazole derivatives, as well as a method of preparing the same. The additive is the reaction product of a 1,3,4-thiadiazole compound and a dithiocarbamic acid or an amine, or an isomer thereof.

Additive compound for curing halogenated polymers

Additives including dithiocarbamyl derivatives of 2,5-dimercapto-1,3,4-thiadiazole (DMTD) useful as curing agents and accelerators. Curable polymer compositions including at least one halogenated polymer and at least one additive including the dithiocarbamyl DMTD derivatives. A method is also disclosed for preparing a cured polymer by admixing at least one halogenated polymer with at least one additive including the dithiocarbamyl DMTD derivatives and subsequently curing the composition.

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West Hartford, CT, United States of America

Francis S Cheng