40 results about "Succinimide derivatives" patented technology

A piston for an internal combustion engine of an automotive vehicle. The piston has a piston ring and a piston skirt section each of which has a sliding section in slidable contact with a cylinder bore section of a cylinder block in presence of a lubricating oil. The cylinder bore section is formed of eutectic or hyper-eutectic aluminum alloy. Additionally, a hard carbon thin film is coated on the sliding section of the piston and contains hydrogen atom in an amount of not more than 1 atomic %. Here, the lubricating oil contains at least one selected from the group consisting of ashless fatty acid ester friction modifier, ashless aliphatic amine friction modifier, polybutenyl succinimide, derivative of polybutenyl succinimide, zinc dithiophosphate, and derivative of zinc dithiophosphate.

The invention discloses a preparation method of multifunctional group bionic mussel adhesive protein polymer. The preparation method comprises four processes: the synthesis and preparation of polysuccinimide prepolymer powder, the synthesis and preparation of water soluble polysuccinimide derivative, the synthesis and preparation of polyaspartic acid derivative, and the synthesis and preparation of bionic mussel adhesive protein polymer. The preparation method utilizes the characteristics of environment protection and nontoxicity of polysuccinimide and the characteristics of adhesive protein and organic coating, sufficient catechol groups introduced to a structure can perform complexation with metal ion on the surface of metal base materials to form a passive film, so that good adhesion is formed on the surface of the metal base materials, active epoxy groups and hydroxyl easily cured and crossly bonded with the organic coating are introduced into the molecular structure, the interface chemical bonding probability between the polymer and the organic coating is improved, the adhesive strength between the polymer and the organic coating is realized, and the protective performance of the whole protective coating is improved.

The invention provides a polyaspartic acid derivative synthetic method. The method comprises the following steps: monosaccharide or disaccharide and monochloro acetic acid are reacted under catalysisof NaOH, and a reactant is subjected to further acidifying and purification to obtain carboxymethyl saccharide; carboxymethyl saccharide and diamine are subjected to dehydration condensation under catalysis of phosphoric acid to obtain glycosyl acetyl diamine; L-aspartic acid and phosphoric acid are respectively added in a kneading reactor for mixing, a mixture is stirred and heated, polymerization is carried out for preset time to obtain polysuccinimide; glycosyl acetyl diamine is added in a reaction vessel of polysuccinimide for a reaction, polysuccinimide is subjected to ring-opening and grafting reaction to obtain a polysuccinimide derivative; the polysuccinimide derivative is added in a hydrolysis kettle, an aqueous solution of alkali is add drop by drop, a hydrolysis reaction is carried out, and a liquid-phase product after hydrolysis is a glycosyl acetyl diamine-grafted modified polyaspartate aqueous solution. The synthetic method is simple and easy to operate, a grafting modification step and a polymerization step are coupled, so that the side-chain grafting rate is increased and the polymericular weight can be regulated and controlled.

Maleimide and succinimide derivatives were found to be effective topoisomerase II catalytic inhibitors. Due to this property, the maleimide and succinimide derivatives were investigated for their use as cytostatic agents and thus in the treatment of cancer. The compounds of the invention can be used in combination treatments with other cytostatic agents, such as topoisomerase II poisons. The maleimide and succinimide derivatives, due to their effective topoisomerase II catalytic inhibitory activity, are also useful as extravasation agents, such as upon administration of a topoisomerase II poison.

The present invention provides a catalytic activity accelerant. The accelerant is added to stock oil for increasing the catalyst activity, the depth of catalytic hydrogenation and the yield of catalytic hydrogenation product, degrading the reaction conditions of catalytic hydrogenation, and improving the quality of product. The catalytic activity accelerant is consisted of an alkyl succinimide derivative, an alkyl phenol and a surfactant. The amount of the alkyl succinimide derivative in the accelerant is 5-70 wt. %. The amount of the alkyl phenol in the accelerant is 2-70 wt. %. The amount of the surfactant in the accelerant is 2-70 wt. %

The invention provides an atypical fluorescent succinimide derivative, as well as a preparation method and an application of the derivative. The derivative is sulfur/nitrogen succinimide; further, sulfur/nitrogen succinimide is particularly 2-sulfur maleimide, 2,3-dithio-succinimide and 2-nitrogen succinimide; the succinimide derivative can be widely used for the field of protein labeling, bacterium detection, heavy metal ion screening and the like.

A lubricating oil additive composition contains a borated succinimide derivative and an amino alcohol compound. A lubricating oil composition containing the lubricating oil additive composition is excellent in high-temperature detergency and base value retention (long-drain capabilities) even though a blended content of a metal detergent is low and an ash content is small.

The invention provides a method for preparing hydroxymethyl furfural by catalytic dehydration reaction of hexose. The method comprises the following steps of: dissolving reaction substrates of hexose into a solvent, and adding a catalyst of halogenated succinimide to form a reaction system; and at the temperature of between 0 and 200 DEG C and under the protection of atmosphere gas, stirring the reaction system by magnetic force for dehydration reaction for 0.5 to 10 hours to prepare the hydroxymethyl furfural, wherein the catalyst of the halogenated succinimide may be N-bromosuccinimide, N-chlorosuccinimide, N-iodosuccinimide, N-fluorosuccinimide or any succinimide derivatives with substituted halogen atoms. The method has the advantages that: the catalyst of the halogenated succinimide is low in price and easily bought, and can catalyze the hexose in high efficiency as well as high selectivity to prepare the hydroxymethyl furfural; the method is environment-friendly, and the productis easily disposed; and in the whole process, only regenerated compounds such as fructose are consumed, the cost is low, the technically economical requirement is met, and the application prospect isbroad.

The invention discloses a functional high-molecular light switch and a synthesizing method thereof, and belongs to the technical field of new materials. The synthesizing method of the functional high-molecular light switch includes the steps of synthesizing an azobenzene derivative modified by dual bonds, synthesizing a succinimide derivative modified by dual bonds, adding hydroxyethyl methylacrylate and N-vinyl pyrrolidone as chain thinners with the azobenzene derivative modified by the dual bonds and the succinimide derivative modified by the dual bonds as the raw amterails, conducting polymerizing through free radicals to obtain the functional high-molecular light switch. The DMSO solution of the copolymer has the capacity of 100 times or more of forward and reverse conversion and has the characteristics of the light switch.

The invention discloses a synthesis method of a PASP derivative with surface activity. The synthesis method comprises the following steps: s1, synthesizing polysuccinimide; s2, synthesizing a polysuccinimide derivative grafted and modified by alkyl primary amine; s3, adding the alkyl primary amine modified polysuccinimide derivative into a hydrolysis kettle, adding water of which the mass is 3-6 times that of the polysuccinimide derivative, stirring and dispersing, slowly dropwise adding 2-5mol/L NaOH solution for hydrolysis under the heating and stirring maintaining conditions, and hydrolyzing at 35-65 DEG C for 2-6h to obtain a hydrolysate, namely an alkyl primary amine graft modified polyaspartate aqueous solution; and carrying out pH adjustment, filtration, ultrafiltration, concentration and purification for further refining. The method is simple and easy to operate, and the polymerization degree and the grafting rate are regulated and controlled by regulating and controlling the proportion and the chain length of the added alkyl primary amine compound. The synthesized alkyl primary amine modified polyaspartic acid derivative has excellent surface activity and chelating property, and has the effects of moisturizing, removing freckles, whitening, improving skin, removing heavy metals and the like.

The invention provides an electrochemical synthesis method of a 2, 2 '-bis-succinimide derivative, which is characterized in that an organic solvent in which a maleimide derivative is dissolved is used as an electrolytic reaction raw material, and the 2, 2'-bis-succinimide derivative is synthesized under an electrolytic condition. Compared with traditional organic synthesis, the electrochemical method for synthesizing the 2, 2 '-bissuccinimide derivative has remarkable advantages, the electrochemical reaction is realized by obtaining and losing electrons from reactants on an electrode, additional reducing agents or metal catalysts are not needed, material consumption is reduced, and therefore environmental pollution is reduced; the reaction can be carried out at room temperature and normal pressure, the reaction condition is mild, and the post-treatment is simple, which is very beneficial to energy conservation and equipment investment reduction; the process flow is simple, the operation is simple and convenient, the reaction is easy to control, and the 2, 2 '-bissuccinimide derivative can be obtained through one-pot reaction; the reaction raw materials are cheap and easily available, and are very safe to use; the reaction process is environment-friendly and meets the requirements of an environment-friendly chemical process.

The present disclosure relates to a compound of the formula I or a tribologically acceptable salt, solvate, hydrate, or proadditive thereof, wherein R1, R2 and R4 are as defined herein. Such novel pyrrolidine, or succinimide, derivatives may be useful as friction modifiers in lubricant compositions. This disclosure also relates to a method of using such friction modifier compounds in lubricating fluid formulations to lubricate machine parts, including gear, axle, engine, and transmission parts, and to lubricant compositions containing such friction modifier compounds.

The present invention provides with a process of preparing an optically active succinimide derivative, which is a key intermediate for production of ranirestat. A compound (3) is easily prepared by treating the derivative of succinic acid diester of the formula (2):

wherein R¹ is an amino group protected with a group removed by hydrogenolysis or a tert-butoxycarbonylamino group and R² is an ethyl group optionally substituted with one or two methyl group(s) at α-position, provided that R² is not a tert-butyl group when R¹ is a tert-butoxycarbonylamino group; with alkali metal alkoxide and the compound (3) can be an important intermediate for production of ranirestat.

Described herein is a new process for the preparation of polysuccinimide derivatives-based core-shell microcapsules. Also described are microcapsules, as well as perfuming compositions and consumer products including these microcapsules, in particular perfumed consumer products in the form of home care or personal care products.