Copolymers of polyaminopolyolefins and polyanhydrides and methods of their preparation (Chevron)

Copolymers of polyaminopolyolefins and polyanhydrides and methods of their preparation (Chevron)

Type	Patent
Inventor	Young Chang
Inventor	Casey Stokes
URL	http://www.google.com/patents/US20140155308
Assignee	Chevron Oronite Company Llc
Patent Number	US20140155308 A1
Issue Date	Jun 5, 2014
Abstract	Provided herein are copolymers of a polyaminopolymer and polyanhydride, wherein the polyaminopolymer comprises a polyaminopolyolefin; and methods of their preparation. BACKGROUND Lubricating oil for an internal combustion engine commonly contains additives to reduce and/or control deposits, wear, and/or corrosion. Similarly, liquid hydrocarbon fuels for an internal composition engine also commonly contain additives to control and/or reduce the formation of deposits. A polyolefin is useful as an additive in a fuel or lubricant as a viscosity modifier. To be useful as a viscosity modifier at both low and high temperatures, such a polymer must have a sufficient thickening effect on a light lubricating oil at high temperatures and a limited thickening effect on the light lubricating oil at low temperatures.