7 results about "Hydroxybenzoates" patented technology

The present application provides a reversible thermochromic microcapsule pigment which is easily changed to a colored state from a colorless state by heating at a temperature in a living environment temperature range or a temperature close to a daily life temperature, and is sensitively recovered to the colorless state again. The reversible thermochromic microcapsule pigment of the present application is formed by enclosing a reversible thermochromic composition in a microcapsule, the reversible thermochromic composition comprising (A) an electron-donating colored organic compound, (B) a 4-hydroxybenzoic acid ester compound represented by the following general formula (1) as an electron-accepting compound (in the formula, R represents a linear or branched alkyl group having 12 to 22 carbon atoms), (C) a chain hydrocarbon compound or the like as a reaction medium in which reversible electron transfer reactions based on the above (A) and (B) occur, (D) a linear dibasic acid compound having 3 to 22 carbon atoms, and (E) an aromatic hydrocarbon compound or the like having a melting point of 50°C or higher.

This invention discloses a sustainable fuel digital tracer system, comprising at least two chemical tracers added at predetermined concentration ratios, which constitute a unique identification code for each batch of fuel. The at least two chemical tracers are selected from methoxyacrylate compounds, or at least one is selected from methoxyacrylate compounds, with the remainder selected from at least one of benzoate compounds, p-hydroxybenzoate compounds, and sorbate compounds. The tracers of this invention are all pure organic small molecules free of metals and halogens, achieving "harmless passage" to the engine after combustion. This system can accurately decode fuel at low concentrations, possesses excellent cross-fuel versatility, and cleverly meets the shelf-life requirements of marine fuels, achieving low-cost, high-precision fuel authenticity verification and accurate traceability.

The invention relates to a poly (aromatic ester-ether)-based biodegradable material polyester and a preparation method thereof. The method comprises the following steps: firstly, taking 3-allyl-4-hydroxybenzoate and cyclohexyl-1, 4-dimethyl alcohol monovinyl ether as monomers, and synthesizing poly (aromatic ester-ether) dihydric alcohol through emulsion polymerization; and carrying out esterification and polycondensation on the polyester, organic dibasic acid, 2, 4-methyl dihydroxybenzoate, a polyfunctional cross-linking agent and a stabilizer under the action of a catalyst to prepare the novel poly (aromatic ester-ether)-based biodegradable material polyester. According to the method, traditional 1, 4-butanediol is replaced with methyl 2, 4-dihydroxybenzoate, so that cyclization side reaction is effectively inhibited, tetrahydrofuran is prevented from being generated, and consistency and stability of product quality are guaranteed. The obtained polyester material has excellent biodegradability and mechanical tensile property, and is suitable for plastic products such as mulching films, packaging bags and the like which need to be completely degraded and have enough mechanical strength requirements.

The present invention relates to a solid oral pharmaceutical composition that includes: (a) an active pharmaceutical ingredient; (b) a nitrosamine inhibitor that includes linear or branched C1-C10 alkyl 3,4,5-trihydroxybenzoate; and (c) a pharmaceutically acceptable excipient. At least one of: (i) the active pharmaceutical ingredient includes at least one covalently bonded amine group that is subject to conversion to nitrosamine; or (ii) the solid oral pharmaceutical composition includes at least one amine, that is other than the amine group covalently bonded to / within the active pharmaceutical ingredient, and which is subject to conversion to nitrosamine. The nitrosamine inhibitor is present in an amount at least sufficient to reduce the amount of nitrosamine formed in the solid oral pharmaceutical composition, compared to the amount of nitrosamine formed in a comparative solid oral pharmaceutical composition that is free of the nitrosamine inhibitor.

An agent for three-dimensional (3D) printing includes at least 3 wt % active, based on a total weight of the agent, of a paraben selected from the group consisting of methyl paraben, ethyl paraben, propyl paraben, butyl paraben, isopropyl paraben, isobutyl paraben, heptyl paraben, benzyl paraben, salts thereof, and combinations thereof; and an aqueous vehicle. The aqueous vehicle includes up to 85 wt % active, based on the total weight of the agent, of a co-solvent package including at least one co-solvent present in an amount sufficient to increase a solubility of the paraben in the aqueous vehicle; and a balance of water.

A stabilized polymeric composition is disclosed comprising an organic polymeric material to be stabilized and a stabilizer composition comprising: at least one inorganic UV blocker, at least one hindered amine light stabilizer compound, at least one hindered phenol antioxidant compound, at least one phosphite or phosphonite compound, at least one thioester, and at least one flame retardant, wherein the stabilizer composition provides effective ultraviolet (UV) light stability, thermal stability, and gas fade resistance to the stabilized polymer even when hindered hydroxybenzoic acid esters, organic UV absorbers, acid scavengers, and / or dialkylhydroxylamines are not present.

The invention discloses an environment-friendly flame-retardant poly (aromatic ester-ether)-based biodegradable material polyester and a preparation method thereof. According to the method, 3-allyl-4-hydroxybenzoate, cyclohexyl-1, 4-dimethyl alcohol monovinyl ether and a specific halogen-free flame retardant allyl phosphate diester are taken as reaction monomers, and the environment-friendly flame-retardant poly (aromatic ester-ether) dihydric alcohol copolymer is synthesized through emulsion polymerization; and then, by taking the copolymer as a precursor, carrying out esterification and polycondensation on the copolymer, organic dibasic acid, a polyfunctional cross-linking agent and a stabilizer under the action of a catalyst to prepare the environment-friendly flame-retardant poly (aromatic ester-ether)-based biodegradable material polyester. According to the invention, the molecular design realizes the synergistic interaction of group enrichment effect and rigid structure effect for the first time, and breaks through the bottleneck of poor flame retardance of the traditional biodegradable material polyester; meanwhile, emission of corrosive gases such as dioxin and hydrogen halide during combustion is avoided, and the material is endowed with efficient biodegradability and green flame retardant property.