6 results about "Triethyl citrate" patented technology

This invention provides a halogen-free no-clean flux and its preparation method, belonging to the field of flux technology. The method includes the following steps: Step S1: L-histidine and itaconic acid are compounded and reacted, then concentrated under reduced pressure, dried, pulverized, and sieved to obtain a histidine-itaconic acid composite activator; Step S2: Polyvinyl butyral is added to a mixed solvent of isopropanol, anhydrous ethanol, and dipropylene glycol methyl ether for wetting, dispersion, and dissolution, followed by the addition of hydrogenated rosin and triethyl citrate to obtain a resin-based solution; Step S3: The histidine-itaconic acid composite activator is added to a mixed system of deionized water, isopropanol, and anhydrous ethanol to obtain an activator solution; Step S4: The activator solution is slowly added to the resin-based solution, defoamed, filtered, and cured to obtain a halogen-free no-clean flux. This invention achieves the goals of good soldering activity, controllable residue, high system uniformity, and good storage stability in halogen-free no-clean flux.

The application provides a feed additive for relieving heat stress of beef cattle and a preparation method thereof, and relates to the technical field of feed additives, and comprises a core material which is composed of the following components in parts by weight: glycyrrhizic acid-chitosan oligosaccharide covalent conjugate 30-50 parts, gamma-aminobutyric acid 10-20 parts, vitamin C 5-10 parts, selenium yeast 1-3 parts, microcrystalline cellulose 5-10 parts, and vitamin E 0.5-1 part; a first protective layer which is wrapped outside the core material and comprises hydrogenated vegetable oil 20-30 parts and glycerol monostearate 2-5 parts; and a second protective layer which is wrapped outside the over-omass-protection layer and comprises acrylic resin 8-15 parts and triethyl citrate 1-3 parts. The application realizes synergistic effect of active ingredients through covalent coupling, realizes non-degradation of active ingredients in the rumen and precise release in the colon through a double-layer targeted structure, can relieve heat stress of beef cattle in multiple dimensions, repair intestinal barriers, optimize rumen fermentation and body immunity, and improve production performance.

This invention discloses a drug-loaded microcapsule-type controlled-release formulation of trigonelline and its preparation method. The method includes: using microcrystalline cellulose pellets as an inert carrier, sequentially loading a trigonelline drug-loaded layer, a hydroxypropyl methylcellulose isolation layer, and a composite controlled-release membrane layer composed of ethyl cellulose, RS / RL acrylic resin, triethyl citrate, and talc using bottom-spray fluidized bed coating technology; and then filling the mixture into capsules after curing. This invention effectively isolates the drug from the controlled-release membrane layer through the isolation layer and utilizes the RS / RL resin compound to synergistically regulate membrane permeability, achieving stable controlled release of trigonelline. The resulting formulation shows a release rate of no more than 25% in 0.1 mol / L hydrochloric acid after 2 hours, and release rates of 20%-45%, 45%-75%, and 70%-95% after 4 hours, 8 hours, and 12 hours in pH 6.8 buffer solution, respectively. The release behavior is stable and controllable, effectively solving the problem of burst release of highly water-soluble drugs and prolonging the duration of action.

This invention discloses a preventive drug formulation for porcine reproductive and respiratory syndrome (PRRS) and its preparation method. The drug formulation uses tylosin tartrate as the active ingredient, loaded onto a blank cellulose carrier to obtain drug carrier nanoparticles, which are then coated with a blocking solution. The blocking solution is obtained by dispersing methacrylate-ethyl acrylate copolymer, triethyl citrate, and talc in deionized water. This invention utilizes the technical characteristics of synthesizing a spirocyclic phosphate diacyl chloride intermediate using pentaerythritol and phosphorus oxychloride, and reacting it with guanidine hydrochloride to construct a guanidine-functionalized crosslinking agent. This results in a guanidine-based intermediate with a rigid spirocyclic structure, providing stable crosslinking sites and spatial framework support for subsequent cellulose crosslinking, achieving the fundamental technical effect of constructing a three-dimensional network porous carrier framework.

A topical mosquito repellent and sunscreen product includes active and inert ingredients. The active ingredients include geraniol, clove oil, and rosemary oil. The inert ingredients include water, mineral oil, zinc oxide, beeswax, monolaurin, triethyl citrate, zeolite, lecithin, and xanthan gum. The mosquito repellent and sunscreen composition is provided as a lotion.