Abstract:
A polymer is dissolved in a liquid hydrocarbon fuel which has a flash point of at least 90.degree. F and is of a type suitable for gas turbine aircraft engines in order to reduce the tendency of the fuel to particulate dissemination when the fuel is subjected to shock. The polymer has a viscosity average molecular weight greater than 10.sup.6 or an intrinsic viscosity greater than 2.5 dls./gm. and the amount of polymer is sufficient that there is molecular overlap of polymer molecules in the liquid.
Abstract:
1. A LIQUID HYDROCARBON FUEL OF FLASH POINT AT LEAST 90* F. AND SUITABLE FOR USE IN GAS TURBINED ENGINED AIRCRAFT, HAVING A REDUCED TENDENCY TO PARTICULATE DISSEMINATION ON BEING SUBJECTED TO SHOCK THE FUEL CONTAINING DISSOLVED THEREIN POLYMER OF MOLECULAR WEIGHT GREATER THAN 10**6 (VISCOSITY AVERAGE) OR OF INTRINSIC VISCOSITY GREATER THAN 2.5 DLS./GM. IN A CONCENTRATION SUCH THAT THERE IS MOLECULAR OVERLAP OF THE POLYMER MOLECULES IN THE LIQUID THE POLYMER BEING AN ADDITION HOMOPOLYMER OF AN ALKYL STYRENE OR AN ADDITION HOMOPOLYMER OF AN ALKYL ONE OR MORE ETHYLENICALLY UNSATURATED NON-POLR MONOMERS COPOLYMERIZABLE WITH SAID ALKYL STYRENE.
Abstract:
Hydrocarbon oils such as residua fuels, residua-containing fuels, flash distillate fuels and crude oils are improved in their pour points by the incorporation of a pour point depressing copolymer of 82 to 90 mole percent ethylene with certain substituted ethylenes of 3 to 40 carbon atoms which have less than 18 carbon atoms in any linear side chains.
Abstract:
Hydrocarbon polymers comprising linear C18 alkyl side chains are added to residual fuels to improve their pour point and flow characteristics. These polymers are prepared by polymerizing C20C40 alpha-olefins in the presence of a Ziegler-type catalyst to a number average molecular weight within the range between about 500 and 125,000. Particularly effective polymers are prepared from C3-C18 alpha-olefins and C20-C40 alpha-olefins.
Abstract:
OIL-SOLUBLE POLYMERS OF UNSATURATED ESTERS HAVING AKYL SIDE CHAINS CONTAINING ABOUT 18 TO 34 CARBON ATOMS IMPROVE FLOW AND POUR POINTS OF HIGH WAX CONTENT PETROLEUM OILS SUCH AS CRUDES, RESIDUA, ETC., AND ARE USEFUL AS DEWAXING ACIDS.
Abstract:
Concentrates containing specific functionalised diblock copolymers serve as effective additives for improving the cold flow behaviour of fuels and oils, the copolymers being derived from a terminally-unsaturated intermediate polymer obtained via a metallocene process involving hydrogen.
Abstract:
Concentrates containing specific functionalised diblock copolymers serve as effective additives for improving the cold flow behaviour of fuels and oils, the copolymers being derived from a terminally-unsaturated intermediate polymer obtained via a metallocene process involving hydrogen.
Abstract:
Concentrates containing specific functionalized diblock copolymers serve as effective additives for improving the cold flow behavior of fuels and oils, the copolymers being derived from a terminally-unsaturated intermediate polymer obtained via a metallocene process involving hydrogen.
Abstract:
A method of improving the cold flow properties of a paraffin-containing fluid that includes admixing an effective amount of a polymer comprising cyclic amide and long chain alkyl functionality is disclosed.
Abstract:
A fuel composition of the present invention exhibits minimized hydrolysis and increased fuel stability, even after extended storage at 65° F. for 6-9 months. The composition, which is preferably not strongly alkaline (3.0 to 10.5), is more preferably weakly alkaline to mildly acidic (4.5 to 8.5) and most preferably slightly acidic (6.3 to 6.8), includes a lower dialkyl carbonate, a combustion improving amount of at least one high heating combustible compound containing at least one element selected from the group consisting of aluminum, boron, bromine, bismuth, beryllium, calcium, cesium, chromium, cobalt, copper, francium, gallium, germanium, iodine, iron, indium, lithium, magnesium, manganese, molybdenum, nickel, niobium, nitrogen, phosphorus, potassium, palladium, rubidium, sodium, tin, zinc, praseodymium, rhenium, silicon, vanadium, or mixture, and a hydrocarbon base fuel.