7 results about "Undecenoic acid" patented technology

A flavor composition is provided. The flavor composition includes decanoic acid; ethyl palmitate; and 10-undecenoic acid.

This invention discloses a microwave-assisted synthesis process for 11-bromoundecenoic acid. The specific steps are as follows: undecenoic acid is mixed with a nonpolar solvent, an initiator is added, and the mixture is stirred. The resulting preliminary reaction mixture is then transferred to a microwave reactor. After adjusting the microwave power and controlling the temperature, the mixed solution undergoes an anti-Markovnikov addition reaction with hydrogen bromide gas within the microwave reactor to generate a bromoundecenoic acid solution. The resulting addition solution is then transferred to a crystallization vessel for freeze crystallization. The crystallized product is filtered to obtain 11-bromoundecenoic acid. This invention utilizes hydrogen bromide aeration and mechanical stirring in the microwave reactor to increase the gas-liquid mass transfer area and improve mass transfer efficiency. The microwave-assisted synthesis of 11-bromoundecenoic acid achieves molecular-level stirring, significantly shortening the reaction time and effectively increasing the yield of the target product. Simultaneously, the use of a nonpolar solvent with weak microwave absorption effectively avoids the thermal effect generated by microwaves, resulting in an even higher yield of the target product.

The present disclosure relates to a deodorising composition containing: (a) 1-para-menthen-8-thiol, (b) 3-mercaptohexyl acetate and (c) undecylenic acid or a derivative thereof. It also relates to the use of the disclosed composition for eliminating bad odours, and to a deodorant product in the form of an aerosol, a candle or a perfume diffuser that has a wick or a stick or is electric. Also provided is an article consisting of a solid polymeric material, in particular a silicone elastomer, containing the disclosed composition.

The invention discloses an inorganic-organic multi-shell toughening agent and a preparation method thereof. According to the toughening agent, nano silicon dioxide serves as a core layer, the surface of the core layer is sequentially coated with titanium dioxide, zirconium oxide, polydopamine and omega-methyl undecylenate to obtain the toughening agent, and the nano silicon dioxide is prepared through an optimized Stober method and is uniform in particle size. According to the toughening agent disclosed by the invention, the inorganic core is coated with the multiple layers of organic shells, so that the problems that a conventional toughening agent is easy to agglomerate, poor in dispersity and poor in compatibility are solved, and meanwhile, adverse effects on the heat resistance and rigidity of a thermosetting olefinic unsaturated resin material are avoided; through strong bonding and crosslinking of organic layer double bonds and resin double bonds, the compatibility and dispersity of the toughening agent and a resin matrix are effectively enhanced, the remarkable toughening effect on a thermosetting olefinic unsaturated resin curing system is achieved from multiple angles, and meanwhile the comprehensive performance such as toughness, mechanical performance, heat resistance and processability of the material is enhanced.

The invention discloses a bio-based polymer capable of being recycled in a closed-loop mode and a preparation method and application of the bio-based polymer. The preparation method comprises the following steps that firstly, isosorbide and acrylic acid are subjected to an esterification reaction to generate a mono-esterification intermediate; respectively carrying out esterification reaction on the single esterification intermediate and bio-based olefine acid 11-dodecenoic acid, cis-tridecane-12-olefine acid, 10-undecylenic acid, 9-decenoic acid, 8-nonenoic acid or 7-octenoic acid containing long-chain alkyl fragments to generate a double esterification intermediate; and carrying out ring-opening metathesis polymerization (ROMP) on the two monomers by using a Grubbs II catalyst to obtain the bio-based polyolefin capable of being recycled in a closed-loop manner. By adjusting the proportion of the raw materials and controlling the reaction time, the relative molecular mass and the mechanical property of the polymer can be regulated and controlled. The polymer can be depolymerized by Grubbs II to obtain a reactant monomer, so that efficient recovery is realized. The bio-based polyolefin material provided by the invention has potential application value in environment-friendly packaging, 3D printing, electronic equipment shells and the like.

The present invention provides a rasagiline mesylate-containing transdermal patch and a preparation method thereof, which further comprises one or more release promoters selected from acetylpropionic acid, octanoic acid, and undecenoic acid, and which is formed by forming a hydrogen bond complex through the cooperative action of rasagiline mesylate with cross-linked polyvidone and a crystallization inhibitor, thereby causing rasagiline mesylate to exist in an amorphous state in a drug carrier and preventing it from existing in an unstable form as a free base.

The application discloses a citrus fruit preservation method based on 10-undecenoic acid. The postharvest citrus is soaked in a preservative containing 10-undecenoic acid as an active ingredient, and then dried. The application finds through experiments that 10-undecenoic acid can significantly delay the rotting of sand sugar orange fruits, significantly delay the consumption of nutrients of the citrus fruits, and maintain better quality of the fruits. Therefore, 10-undecenoic acid can be used for postharvest disease prevention and preservation of fruits and vegetables, especially citrus fruits.