摘要:
A fumaric acid pour point depressant for crude oil and a preparation method therefor are provided. The fumaric acid pour point depressant is obtained by polymerizing a first prepolymer, a second prepolymer, a third monomer and a fourth monomer, where the first prepolymer is obtained by pre-polymerizing vinyl acetate and a first monomer; and the second prepolymer is obtained by pre-polymerizing fumaric acid and a second monomer.
摘要:
Copolymers consisting of 95 to 50 weight percent of ethylene and 5 to 50 weight percent of methoxyacetic acid vinyl ester and having a molecular mass from 500 to 10,000 g.times.mole .sup.-1. Methods for preparation and use are also disclosed. The copolymers are used as flow improvers for mineral oil distillates, in particular mineral oil middle distillates.
摘要:
A method for improving lubricating oils consisting of the steps of treating a lubricating oil with a monomer selected from the group consisting of vinyl chloride and mixtures of vinyl chloride with up to 30 percent by weight of another vinyl monomer selected from the group consisting of vinyl acetate and vinylidene chloride at a pressure of from 1 to 16 excess atmospheres and a temperature of from 10*C to 150*C in the presence of an oilsoluble free-radical-former for a time sufficient to obtain a polymer content of from 0.5 percent to 3 percent by weight based on the amount of the lubricating oil, and recovering said improved lubricating oil; as well as the improved lubricating oil having a content of 0.5 percent to 3 percent by weight of said polymer polymerized in situ.
摘要:
A composition includes (a) a hydrocarbon fluid comprising less than 1000 ppm by weight of aromatics, a weight ratio normal paraffins/isoparaffins ranging from 0.2 to 1.0 and having an initial boiling point and a final boiling point in the range from 265° C. to 380° C., and (b) a copolymer derived from alpha-olefin monomers and vinyl acetate type monomers and optionally acrylate type monomers.
摘要:
This invention relates to malienated derivatives made from maleic anhydride, functionalized monomers, and one or more additional reagents, e.g., an oxygen-containing reagent (e.g., alcohol, polyol), a nitrogen-containing reagent (e.g., amine, polyamine, aminoalcohol), a metal and/or a metal compound. The invention relates to lubricants, functional fluids, fuels, dispersants, detergents and functional compositions (e.g., cleaning solutions, food compositions, etc.)
摘要:
A polymeric composition suitable for lowering the Pour Point of paraffinic crude oils comprising a synergic mixture including at least two ethylene-vinyl acetate copolymers respectively having an average molecular weight Mw lower than 130,000 Dalton (measured via GPC), a content of vinyl acetate monomer ranging from 15 to 50% by weight, with the proviso that the content of vinyl acetate monomer in the respective copolymers differs from one copolymer to another, by over 5%, on a weight basis.
摘要:
This disclosure relates to sulfurized derivatives made from functionalized monomers. The disclosure relates to lubricants, functional fluids, fuels, dispersants, detergents and functional compositions (e.g., cleaning solutions, food compositions, etc.)
摘要:
Terpolymers obtained by copolymerization of ethylene, a vinyl ester of at least one aliphatic monocarboxylic acid of 2 to 20 carbon atoms in the molecule and bicyclo�2.2.1!hept-2-ene (also referred to as norbornene) or its derivatives, a process for their preparation and their use as additives for mineral oils and mineral oil distillates.
摘要:
Compositions comprising (a) an ethylene-mixed unsaturated ester copolymer or (b) two or more ethylene-unsaturated ester copolymers differing in their ester chains improve the low temperature properties of fuel oils.