13227 results about "Acid anhydride" patented technology

A dispersant composition comprising the product of an amine, an alcohol, or an amino alcohol, with a hydrocarbyl-substituted succinic anhydride component exhibits improved viscosity stability and reduced chlorine content, when the hydrocarbyl-substituted succinic anhydride component comprises: (a) 10 to 95 weight percent of a component prepared by reacting a polyisobutylene with maleic anhydride in the presence of chlorine; and (b) 5 to 90 weight percent of a component prepared by reacting a polyisobutylene with maleic anhydride in the substantial absence of chlorine.

Cementing compositions and methods of cementing in a subterranean formation are provided. The cement composition includes a hydraulic cement, lightweight beads, and a desegregating agent for inhibiting segregation of the beads. The lightweight beads may be, for example, cenospheres, glass spheres, and ceramic spheres. The desegregating agent comprises a particulate substrate such as precipitated silica. It also comprises a polar molecule producing chemical disposed on the particulate substrate. Preferably, the polar molecule producing chemical is absorbed on the particulate substrate. The polar molecule producing chemical comprises at least one of a polar molecule producing acid such as glacial acetic acid, a salt of such an acid, and an acid anhydride. The method of cementing includes forming a pumpable slurry using the cement composition, pumping the slurry into a subterranean formation, and allowing the slurry to set.

The present invention relates to a composite semipermeable membrane which is characterized in that it is a composite semipermeable membrane in which there is formed by polycondensation on top of a microporous support membrane a crosslinked polyamide ultra-thin membrane layer from polyfunctional amine, polyfunctional acid halide and polyfunctional acid anhydride halide, and the flow of water permeate at an operating pressure of 0.3 MPa, a temperature of 25° C. and a pH of 6.5 lies in the range from 0.8 to 4.0 m3 / m2.day and, furthermore, the percentage humic acid removal is at least 98%; a method for the production thereof; and a water purification method employing same. With the composite semipermeable membrane obtained by means of the present invention it is possible, in particular, to recover drinking water at a high rate by permitting passage of silica and preventing deposition thereof at the membrane surface while selectively separating / removing the pollutants and trace quantities of harmful materials and their precursors, etc, contained in the raw water in water treatment plants.

The present invention relates to a novel blend composition suitable for use in sports equipment in general and in particular for use in golf ball manufacture. The composition is the reaction product of; A) a polymer of ethylene and / or one or more alpha olefins, and an acid, ester, or anhydride (“Component (A)”); and B) a compound comprising both an amine and a carboxylic acid in the same molecule which may be present in either a neutral or ionic or zwitterionic form (“Component (B)”); and C) a basic metal ion salt, capable of neutralizing the acid groups of Component (A) and / or Component (B). The metal ions including Li+, Na+, K+, Zn+, Co2+, Ca2+, Ni2+, Cu2+, Pb2+, and Mg2+, with Li+, Na+, Zn2+, Ca2+, and Mg2+ being preferred, and their salts include those of, for example, formic acid, acetic acid, nitric acid, sulfuric acid, carbonic acid, bicarbonic acid, as well as the metal oxides, hydroxides, and alkoxides (“Component (C)”). The present invention is also embodied in a blend composition including the reaction product of one or more ionomers and Component (B) which is a compound having a general formula (R2N)m—R′—(X(O)nORy)m, where R is either hydrogen, one or more C1-C20 aliphatic systems, one or more cycloaliphatic systems, one or more aromatic systems, or a combination of these. Also R′ is a bridging group comprising one or more unsubstituted C1-C20 straight chain or branched aliphatic or alicyclic groups, or one or more substituted straight chain or branched aliphatic or alicyclic groups, or one or more aromatic groups, one or more oligomers each containing up to 12 repeating units, and when X is C or S or P, m is 1-3. Also when X=C, n=1 and y=1, and when X=S, n=2 and y=1, and when X=P, n=2 and y=2. The present invention also resides in a golf ball including a core, an outer cover layer; and from 0 to 5 intermediate layers, wherein one or more of said core, outer cover, and / or intermediate layers, if present, includes the aforementioned blend compositions. Finally, the present invention is also embodied in sports equipment items comprising the aforementioned blend compositions.

The invention is based on the discovery that a remarkable improvement in the performance of maleimide thermosets can be achieved through the incorporation of imide-extended mono-, bis-, or polymaleimide compounds. These imide-extended maleimide compounds are readily prepared by the condensation of appropriate anhydrides with appropriate diamines to give amine terminated compounds. These compounds are then condensed with excess maleic anhydride to yield imide-extended maleimide compounds.

A multilayer heat-sealable chlorine-free odor barrier film having relatively low modulus, high interlaminar strength, and low noise upon flexing is provided. The film comprises an odor barrier layer of an amorphous polyamide resin blended with an anhydride-modified olefinic polymer or copolymer. The film also includes at least one heat-sealable skin layer, preferably two such skin layers on opposite sides of said odor barrier layer, composed of an ethylene polymer or copolymer. Pouches formed of such multilayer films are also disclosed.

A non-aqueous secondary battery contains a positive electrode, a negative electrode, a separator and a non-aqueous electrolytic solution. The positive electrode contains a layered structure lithium-containing compound oxide, or a spinel lithium-containing compound oxide containing manganese as an active material. The non-aqueous electrolytic solution contains at least one additive selected from a sulfonic acid anhydride, a sulfonate ester derivative, a cyclic sulfate derivative and a cyclic sulfonate ester derivative, and a vinylene carbonate or a derivative of the vinylene carbonate.

Oilfield apparatus and methods of use, the apparatus comprising an elastomeric composition comprising the reaction product of a linear or branched polymer having residual ethylenic unsaturation with an ethylenically unsaturated organic monomer having at least one reactive moiety selected from the group consisting of acid, acid anhydride, and acid salt.

The present invention provides a process for the carbonylation of an alcohol, ether or ester to products comprising a carboxylic acid, the anhydride thereof or coproduction of the carboxylic acid and anhydride. More particularly, the present invention provides a process for the carbonylation of methanol to produce acetic acid by reacting methanol with carbon monoxide in a liquid reaction medium containing a catalyst comprising rhodium, iridium, iodide ion, and said reaction medium further comprising water, acetic acid, methyl iodide, and methyl acetate and subsequently recovering acetic acid from the resulting reaction product.

An aqueous, formaldehyde-free binder composition comprising a modified copolymer of maleic anhydride and a vinyl aromatic compound such as styrene, the copolymer being modified by reaction with a primary alkanolamine, such as monoethanolamine (MEA), to produce a modified copolymer that is self-curing and cures as a consequence of cross-linking, esterification reactions between pendant carboxyls and hydroxyl groups on the solubilized (hydrolyzed) modified copolymer chains; the invention also relates to the corresponding method of using the binder composition for making fiber products, especially fiberglass insulation.