4 results about "Citraconic Anhydrides" patented technology

This invention relates to the field of insulating materials, and more particularly to a thermoplastic polyolefin insulating material, its preparation method, and its applications. The raw materials for preparing the thermoplastic polyolefin insulating material mainly include functional modified monomers and polyolefins. The polyolefins include poly4-methylpentene, and the functional modified monomers are unsaturated acid anhydrides and their analogues, including at least one of citrate anhydride, maleimide, and maleic anhydride. The thermoplastic polyolefin insulating material prepared by this invention exhibits excellent high-temperature resistance and high-temperature DC volume resistivity, making it suitable for long-term use under high temperature and high electric field strength conditions. It can be used in the field of cable insulation materials and has thermoplastic recyclability.

The invention relates to a liquid decolorizing agent for decolorizing crude styrene and a decolorizing method of crude styrene. The liquid decolorizing agent contains 70-90 wt% of a decolorizing component and the balance of a polymerization inhibitor. Wherein the decolorizing component contains a first decolorizing component and optionally a second decolorizing component, and the first decolorizing component contains citraconic anhydride. The decolorizing agent disclosed by the invention is liquid at normal temperature, stable in property and good in decolorizing effect.

The application discloses a synthesis method of 1,3-bis(citraconimidemethyl) benzene, citraconic anhydride and m-xylylenediamine are reacted in the presence of an organic acid and a benzene series solvent to obtain 1,3-bis(citraconimidemethyl) benzene, wherein the mass of the organic acid accounts for 30-50% of the total mass of the organic acid and the benzene series solvent. In the synthesis method, the benzene series solvent and the organic acid are used as double solvents, the organic acid also has the function of a catalyst, the amount of material is small, the condensation reflux temperature is low, the inhibition effect on amine byproducts is good, the corrosion of the reaction container is small, the reaction time is short, the double solvents after the reaction do not need to be separated, can be directly used, the atomic economy is high, and the industrialization is more favorable.

The invention provides a composition, a preparation method thereof and a carrier, and belongs to the technical field of high polymer materials. The composition comprises the following components in percentage by mass: 50%-85% of cycloolefin resin, 3%-25% of a first thermoplastic elastomer, 10%-25% of a second thermoplastic elastomer and 0.3%-8% of conductive filler. The first thermoplastic elastomer comprises a thermoplastic elastomer and a polar monomer grafted to the thermoplastic elastomer; the polar monomer comprises at least one of maleic anhydride, itaconic anhydride, citraconic anhydride, crotonic anhydride, acrylic acid, methacrylic acid, methyl acrylate, ethyl acrylate, methyl methacrylate, ethyl methacrylate and glycidyl methacrylate. The second thermoplastic elastomer includes a styrene segment as a repeating unit. The material prepared from the composition has the characteristics of low moisture absorption, high heat resistance, high cleanliness, high mechanical strength and antistatic property.