2 results about "Isobutylmethacrylate" patented technology

This invention provides an apparatus and method for producing isobutyl methacrylate using a novel membrane reactor. The apparatus integrates a tubular fixed-bed reactor with a pervaporation membrane system. A compartmentalized structure maintains the pressure difference across the membrane, and a dual-tube module optimizes the channel spacing to suppress polymerization side reactions. During the reaction, the pervaporation membrane selectively removes the byproduct water, breaking the equilibrium limitation of the esterification reaction and significantly improving the feed conversion rate. Simultaneously, it disrupts the water-isobutanol azeotropic system, reducing subsequent separation energy consumption and achieving integrated reaction and separation processes. This invention solves the problems of equilibrium limitation on conversion rate, high separation energy consumption, and easy polymerization in traditional processes. It features high conversion rate, low energy consumption, and stable operation, making it suitable for the continuous and green production of isobutyl methacrylate.

The invention relates to an artificial corneal endothelium sheet as well as a preparation method and application thereof. The artificial corneal endothelium sheet is prepared from the following raw materials: a hydrophilic monomer, a hydrophobic monomer, a cross-linking agent, an ultraviolet absorption monomer, a blue light absorption monomer and an initiator, the hydrophilic monomer comprises a combination of hydroxyethyl methylacrylate and polyethylene glycol methacrylate, and the hydrophobic monomer comprises a combination of methyl methacrylate and isobutyl methacrylate; in the preparation raw materials, the use amount of the hydrophilic monomer is 80-94 wt%, and the use amount of the hydrophobic monomer is 5-19 wt%. According to the artificial corneal endothelium sheet provided by the invention, the proportion and components of the hydrophilic monomer and the hydrophobic monomer are regulated and controlled, so that the obtained artificial corneal endothelium sheet is moderate in water content and has excellent mechanical properties, adhesion performance and swelling stability.