145 results about "Triethyl citrate" patented technology

A wildfire defense spraying system installed on property with combustible property surfaces, and adapted for spraying the combustible property surfaces with an environmentally-clean water-based liquid fire inhibitor for defending against wildfire by inhibiting fire ignition and flame spread caused by hot flying wildfire embers created during a wildfire storm. The wildfire defense spraying system includes: a storage tank containing a supply of environmentally-clean liquid fire inhibitor comprising an alkali metal salt of a nonpolymeric carboxylic acid, and triethyl citrate (TEC) dissolved in water according to a prespecified formulation, wherein the environmentally-clean water-based liquid fire inhibitor remains stable without the formation of solids at expected operating temperatures, and ready for immediate spraying on combustible surfaces. An electric-powered hydraulic pump system is connected to a remote power control switch employed to supply electrical power to the electric-powered hydraulic pump system. A plurality of spray heads are mounted about the property and any buildings thereon, and arranged in fluid communication with the storage tank and the hydraulic pump system. During operation, the hydraulic pump system automatically pumps environmentally-clean water-based liquid fire inhibitor from the storage tank and through the spray heads to generate a spray pattern of environmentally-clean water-based liquid fire inhibitor over all the combustible surfaces on the property. As water molecules in the sprayed environmentally-clean water-based liquid fire inhibitor evaporate to the environment, thin fire-inhibiting alkali metal salt crystalline coatings form on the combustible property surfaces, inhibiting fire ignition and flame spread in the presence of wildfire embers.

A remotely-triggered wildfire defense spraying system installed on property with a building, and adapted for spraying the building and property with an environmentally-clean water-based liquid fire inhibitor for defending against wildfire by inhibiting fire ignition and flame spread caused by hot flying wildfire embers created during a wildfire storm. The wildfire defense spraying system includes: a storage tank containing environmentally-clean liquid fire inhibitor comprising an alkali metal salt of a nonpolymeric carboxylic acid, and triethyl citrate (TEC) dissolved in water according to a prespecified formulation, wherein the environmentally-clean water-based liquid fire inhibitor remains stable without the formation of solids at expected operating temperatures, and for immediate spraying on property. A fluid pumping loop having a hydraulic pump system is connected to spray heads and the storage tank, and is operably controlled by a remote control switch. When the hydraulic pump system is remotely activated by a remotely generated trigger signal (e.g. from a mobile smartphone or remote wildfire detection system), the hydraulic pump system pumps environmentally-clean water-based liquid fire inhibitor from the storage tank and through the spray heads to produce a spray pattern of environmentally-clean water-based liquid fire inhibitor covering the combustible surfaces on the property. As water molecules in the sprayed environmentally-clean water-based liquid fire inhibitor evaporate to the environment, fire-inhibiting alkali metal salt crystalline coatings form on the sprayed combustible surfaces, inhibiting fire ignition and flame spread in the presence of wildfire embers.

A wildfire defense spraying system installed on a property with combustible surfaces and adapted for spraying the property and combustible surfaces with an environmentally-clean water-based liquid fire inhibitor for defending against wildfire by inhibiting fire ignition and flame spread caused by hot flying wildfire embers created during a wildfire storm. The wildfire defense system includes: a storage tank containing an environmentally-clean liquid fire inhibitor comprising a majority amount of tripotassium citrate (TPC) and minor amount of triethyl citrate (TEC) dissolved in a major amount of water according to a prespecified formulation, wherein the environmentally-clean water-based liquid fire inhibitor remains stable without the formation of solids at expected operating temperatures, and ready for immediate spraying on combustible surfaces. A hydraulic pump system is connected to remote power control switch employed to supply electrical power to the hydraulic pump, and remotely activated. A plurality of spray heads is mounted about the property, in fluid communication with the storage tank, and supplied with environmentally-clean water-based liquid fire inhibitor by the hydraulic pump system. During operation, the spray heads spray liquid fire inhibitor from the storage tank forming a spray pattern that covers the property and combustible surfaces to be defended against wildfire embers. When the hydraulic pump system completes pumping and spraying the environmentally-clean water-based liquid fire inhibitor in the storage tank, the hydraulic pump system automatically shuts off, and as water molecules in the sprayed environmentally-clean water-based liquid fire inhibitor evaporate to the environment, thin potassium salt crystalline coatings form on the sprayed combustible property surfaces, inhibiting fire ignition and flame spread in the presence of wildfire.

A wildfire defense spraying process for spraying and protecting property and combustible surfaces with an environmentally-clean water-based liquid fire inhibitor that inhibits fire ignition and flame spread caused by hot flying wildfire embers created during a wildfire storm. The wildfire defense spraying process involves maintaining a storage tank containing a supply of environmentally-clean water-based liquid fire inhibitor comprising a major amount of tripotassium citrate (TPC) and minor amount of triethyl citrate (TEC) dissolved in a major amount of water according to a prespecified formulation, wherein the environmentally-clean water-based liquid fire inhibitor remains stable without the formation of solids at expected operating temperatures, and ready for immediate spraying on combustible property. When a spraying-trigger signal is received by an automated wildfire detection system, a mobile phone or other intelligent source, an electric-powered hydraulic pump system is automatically energized and pumps environmentally-clean water-based liquid fire inhibitor from the storage tank through piping, under pressure, to spray heads mounted about the property, to produce a spray pattern of environmentally-clean water-based liquid fire inhibitor that covers all the property and combustible surfaces to be defended against wildfire. When the hydraulic pump system completes its pumping operations, the hydraulic pump system automatically shuts off. As water molecules in the sprayed environmentally-clean water-based liquid fire inhibitor evaporates to the environment, thin fire-inhibiting potassium salt crystalline coatings form on the sprayed combustible surfaces, inhibiting fire ignition and flame spread in the presence of wildfire embers.

The invention relates to the technical field of medicines, in particular to a sustained-release coating as well as a preparation method and application thereof. The coating adopts a three-layer gradient structure design and comprises an inner layer coating, a middle layer coating and an outer layer coating, and the layers are compounded and matched through ethyl cellulose and hydroxypropyl methylcellulose with different molecular weights and are combined with talcum powder filling amount with gradient decreasing and a triethyl citrate plasticizer, so that accurate regulation and control of drug release are realized. Through hierarchical swelling-diffusion dynamic balance, burst release is inhibited, the inner layer has high talcum powder content to resist initial swelling stress, the outer layer has low filling amount to maintain hydrophobic continuity, interface defects are reduced in combination with high-temperature curing, and the release stability and long-term storage performance of drugs such as dihydroergoline mesylate are remarkably improved; the problems of sudden release, damp-heat sensitivity, impurity generation and the like of a traditional single-layer coating are solved.

The invention relates to a perovskite solution, a preparation method and application thereof, and a perovskite battery. The perovskite solution comprises a perovskite precursor and an additive, the additives are dibasic acid ester, nylon acid diisobutyl ester, iodobenzene diacetic acid, diisopropanolamine, diethanol amine, diisodecyl adipate, dibutyl adipate, dimethylacetamide, dioctyl adipate, diisobutyl glutarate, dimethyl sebacate, diisobutyl adipate, diisobutyl succinate and triethyl citrate; and at least one of tributyl citrate. According to the perovskite solution disclosed by the invention, the bromide ion-free or low-bromide ion perovskite precursor can form a black-phase film with good stability by adding the additive, so that the photoelectric conversion efficiency of a perovskite photovoltaic device is improved.

The invention relates to the technical field of environment-friendly materials, and discloses a high-strength degradable packaging material and application of the high-strength degradable packaging material in cosmetic packaging materials.The preparation method of the high-strength degradable packaging material comprises the steps that polylactic acid, vanillic aldehyde modified polyester, polyadipic acid, triethyl citrate, calcium stearate and an antioxidant are added into a high-speed mixing machine, and the mixture is stirred to be uniform; mixing at 60 to 80 DEG C for 10 to 20 minutes to obtain a mixed material; the mixed material is subjected to melt blending through a double-screw extruder, the blending temperature is 160-180 DEG C, the screw rotating speed is 250-300 rpm, extrusion granulation and drying are conducted, and the high-strength degradable packaging material is obtained. The high-strength degradable packaging material can be applied to cosmetic packaging materials such as bottle bodies, bottle caps, hoses and packaging boxes. The prepared packaging material is high in mechanical strength and has good degradability and flame retardance.

The invention provides a low-smoke halogen-free environment-friendly cable material and a preparation method thereof. The invention discloses a cable material. Comprising the following raw materials in parts by weight: 40-48 parts of an ethylene-vinyl acetate copolymer, 20-32 parts of polyethylene resin, 13-18 parts of cellulose acetate fibers, 1-3 parts of epoxidized soybean oil, 2-5 parts of ethylene bis stearamide, 2-5 parts of triethyl citrate, 3-6 parts of polyethylene glycol diacrylate, 3-6 parts of N-hydroxymethyl acrylamide, 8-12 parts of modified nano oxide and 13-18 parts of a flame retardant additive. And 0.1 to 0.6 part of an antioxidant. The cable material disclosed by the invention takes the ethylene-vinyl acetate copolymer, the polyethylene resin, the triethyl citrate, the polyethylene glycol diacrylate, the N-hydroxymethyl acrylamide, the modified nano oxide, the flame-retardant additive and the antioxidant as raw materials, and the tensile strength and the elongation at break of a cable can be effectively improved through the synergistic interaction of the raw materials; the halogen-free flame-retardant cable material does not contain halogen raw materials, has a relatively high flame-retardant effect, releases relatively low smoke during combustion, and has a good application prospect.

The invention discloses a lacidipine film-controlled sustained-release pellet capsule and a preparation method thereof, relates to the technical field of medicines, and aims to solve the problem of release reduction caused by film aging of a lacidipine film-controlled sustained-release pellet prepared by an aqueous dispersion coating. The preparation method comprises the following steps: respectively weighing a lacidipine bulk drug, a polymer carrier material and a plasticizer according to a prescription amount, grinding and uniformly mixing to prepare the lacidipine solid dispersion. A sustained-release coating film of the pellet capsule contains Eurdragit RL30D, a plasticizer triethyl citrate and an anti-sticking agent talcum powder, and a pellet core contains croscarmellose sodium and an excipient. According to the lacidipine solid dispersion solid preparation provided by the invention, lacidipine exists in the carrier material in a microcrystalline state, an amorphous state, a colloidal dispersion state or a molecular dispersion state, so that the lacidipine solid dispersion solid preparation has high dispersity, the dissolution speed of a medicine is accelerated, the absorption of the medicine can be promoted, and the bioavailability is improved.

The invention belongs to the technical field of pharmaceutical preparations, and particularly relates to a saxagliptin metformin sustained release tablet and a preparation method thereof. The saxagliptin and metformin sustained release tablet comprises a saxagliptin pellet, a metformin hydrochloride pellet and a color coating, the saxagliptin pellet is prepared from the following raw materials: saxagliptin monohydrate, a silicon dioxide pellet core, hydroxypropyl methylcellulose, talcum powder and hydrochloric acid, the metformin hydrochloride pellet is prepared from the following raw materials: metformin hydrochloride, ethyl cellulose and triethyl citrate; the color coating comprises the following raw materials: a gastric-soluble film coating premix, hydrochloric acid and polyethylene glycol. The medicine is stable in quality, accurate in dosage and short in production time, and the quality is consistent with that of an original developed preparation.

Provided are a smoking article filter and a smoking article. The smoking article filter includes lyocell tow including lyocell fibers and a phenol reducing material dispersed in the lyocell tow, wherein the phenol reducing material includes triethyl citrate (TEC), and the content of the triethyl citrate (TEC) ranges from 0.11 mg to 1.85 mg per length (mm) of the lyocell tow.

The invention belongs to the field of microbial fertilizers, and particularly relates to a compound fertilizer with a microbial coating layer structure and a preparation process of the compound fertilizer. Comprising the following steps: preparing a microbial nutrient adhesive; preparing a quantum dot complex microbial inoculant; and carrying out microbial coating on the nitrogen-phosphorus-potassium fertilizer. Carboxylated active stone powder and konjac glucomannan are mixed and subjected to ultrasonic treatment, potassium carbonate is added, konjac glucomannan is induced to form irreversible gel, and then a shellac solution formed by compounding dewaxed shellac and triethyl citrate is added and compounded with a microbial nutrient adhesive. A mineral skeleton-polysaccharide network-resin enhanced system structure is formed, the strength of the subsequently prepared compound fertilizer with a microbial coating structure is synergistically enhanced, the storage stability of compound microbial bacteria is increased, and the quantity of the compound microbial inoculants is effectively preserved after fertilization, so that soil remediation is promoted, and the soil remediation effect is improved. The disease resistance and the nutrient absorption capability of crops are enhanced, and the growth capability and the quality of the crops are improved.

The invention belongs to the technical field of disposable tableware, and particularly relates to wheat straw fiber-based full-degradable molded product slurry as well as a preparation method and application thereof. The wheat straw fiber-based fully-degradable molded product slurry is prepared from wheat straw slurry, wheat bran, modified soybean protein glue, palm wax, nano cellulose, chitosan, triethyl citrate, sodium carboxymethyl cellulose and calcium sulfate. Wherein the wheat straw slurry adopts a microbial pretreatment process, the usage amount of chemicals is reduced, pulping waste liquid can be recycled as an organic fertilizer, and the problem of high pollution caused by traditional chemical treatment is avoided; all auxiliary agents in the formula, such as modified soybean protein glue, palm wax, chitosan and the like, are biodegradable materials, and the final product can be completely degraded in the natural environment and meets the full-degradation standard.

The invention discloses a damp-proof PVC wood grain sheet and a preparation method thereof, and belongs to the technical field of PVC wood grain sheet production. The damp-proof PVC wood grain sheet is prepared from the following components in parts by weight: 90 to 100 parts of PVC resin, 25 to 30 parts of acetyl triethyl citrate, 20 to 25 parts of modified damp-proof microcapsules, 10 to 15 parts of damp-proof coating liquid, 4 to 8 parts of tricresyl phosphate, 3 to 5 parts of a stabilizer, 3 to 5 parts of wood grain color master batch, 0.5 to 1 part of calcium stearate and 0.1 to 1 part of a light stabilizer 944. The PVC wood grain sheet prepared by the invention has good mechanical properties and moisture resistance.

The invention belongs to the technical field of polymer composite materials, and particularly relates to a high-performance cellulose acetate butyrate composite material and a preparation method thereof. The high-performance cellulose acetate butyrate composite material is prepared from the following components in parts by weight: 100 parts of cellulose acetate butyrate, 5 parts of triethyl citrate and 2.5 to 10 parts of novel silicon dioxide hybrid nanoparticles. The high-performance cellulose acetate butyrate composite material has excellent properties and functions of mechanical strength, ductility, ultraviolet blocking, oxidation resistance, bacteria resistance, ammonia-sensitive discoloration and the like, is simple in preparation process, environment-friendly, low in cost and suitable for large-scale production, and has wide application prospects. The method has wide application value in the fields of food packaging, intelligent materials, antibacterial materials, ultraviolet protection, ammonia gas detection, environment monitoring, safety and the like.

The application provides a bupropion hydrochloride sustained-release tablet and a preparation method, and belongs to the technical field of pharmacy. The pharmaceutical composition contains 150 parts of bupropion hydrochloride, 122.5-157.5 parts of glycerin monostearate, 17.5-22.5 parts of triethyl citrate, 68-104 parts of microcrystalline cellulose and 2-6 parts of magnesium stearate, wherein the bupropion hydrochloride raw material and the glycerin monostearate and the triethyl citrate are prepared into a solid dispersion through a hot melt extrusion process. The application provides a bupropion hydrochloride sustained-release tablet which is stable in drug release, slow in growth of related substances, does not need to be coated and can be taken and eaten, and a preparation method.

The invention discloses a polyhydroxyalkanoate composite material, an oral care product and a preparation method of the oral care product, and belongs to the technical field of bio-based high polymer materials. Wherein the polyhydroxyalkanoate composite material is prepared from the following components in percentage by mass: 82 percent to 98.5 percent of polyhydroxyalkanoate, 1 percent to 15 percent of hydroxyapatite and 0.5 percent to 3 percent of triethyl citrate. The composite material disclosed by the invention can be used for improving the mechanical property while inhibiting the water absorption, so that the dimensional stability and the long-term use stability of the oral care product are favorably improved.

The invention belongs to the technical field of biological medicine, and particularly relates to a ganoderma lucidum polysaccharide sustained-release liver protection preparation and a preparation method thereof.The preparation comprises a pellet, the pellet comprises a pellet core, a medicine layer, an inner sustained-release layer and an outer mucous membrane attachment enteric-coated composite layer, and the pellet core is coated with the medicine layer, the inner sustained-release layer and the outer mucous membrane attachment enteric-coated composite layer in sequence; the medicine layer contains high-purity ganoderma lucidum polysaccharide; the inner slow-release layer is composed of ethyl cellulose, triethyl citrate and polyethylene glycol 4000; the outer mucous membrane attachment enteric composite layer is formed by compounding chitosan and a pH sensitive polymer, preferably, an in-situ network structure is formed through calcium ion crosslinking, and the outer mucous membrane attachment enteric composite layer has the enteric function and the mucous membrane attachment function. The invention aims to solve the problems that the existing ganoderan preparation is too fast in release, large in blood concentration fluctuation and short in action time. Through the synergistic effect of the structures, the ganoderma lucidum polysaccharide sustained-release liver protection preparation is stable in stomach, targeted in intestinal tract release and retained in mucous membranes, the sustained-release effect of 12 h or above is achieved, and the bioavailability and the liver protection curative effect are remarkably improved.

Disclosed is a dissolvable solid article comprising: (a) from about 5% to about 60%, by weight on a dry article basis, of a polymeric structurant; (b) from about 5% to about 90%, by weight on a dry article basis, of a surfactant system; (c) from about 0.1% to about 25%, by weight on a dry article basis, of a liquid material having ClogP of from about 0 to about 5 such as triethyl citrate. The dissolvable solid article disclosed herein can: incorporate skin care additives without deteriorating properties of the articles, wherein such properties are, for example, dissolution property; and / or improve bonding between piles and / or fibrous elements, when the article is layered and comprises at least 2 plies and / or when the article is a fibrous article comprising a plurality of fibrous elements.

The present application describes compositions comprising 5-MeO-DMT, one or more diluents, and optionally a cannabinoid compound for inhalation through vaporization. In certain embodiments, the compositions can be utilized as a treatment of trauma-related disorder or stressor-related disorder, such as post-traumatic stress disorder (PTSD), acute stress disorder (ASD), reactive attachment disorder (RAD), and disinhibited social engagement disorder (DSED). In particular embodiments, the composition comprises about 15-45% 5-MeO-DMT and 15-35% CBD dissolved in triethyl citrate or alpha-bisabolol, which has been observed herein to effectively remedy patients' anxiety and stress.

A filter material is shown comprising a cellulose fiber-based substrate, an additive and an adhesion promoter, wherein the mass ratio of the additive and the adhesion promoter is at least 1:3 and at most 2:1, and the additive and the adhesion promoter together constitute at least 3% and at most 40% of the mass of the cellulose fiber-based substrate, wherein the additive is triethyl citrate, triacetin or a mixture of these substances, and wherein the adhesion promoter is selected from the group consisting of ethanediol, propanediol, butanediol, pentanediol and glycerin diacetate or mixtures thereof.

The invention belongs to the technical field of traditional Chinese medicine preparations, and particularly relates to a traditional Chinese medicine preparation for treating pleural effusion and peritoneal effusion and a preparation method thereof.The traditional Chinese medicine preparation is prepared from, by weight, 10-50 parts of traditional Chinese medicine extract, 30-70 parts of filler, 5-20 parts of enteric coating material, 5-15 parts of HPMC, 0.5-2 parts of triethyl citrate and 0.25-1.5 parts of magnesium stearate; poria cocos, polyporus umbellatus, rhizoma alismatis, astragalus membranaceus, curcuma zedoary, cassia twig, oldenlandia diffusa, sculellaria barbata, semen coicis and traditional Chinese medicine extracts are used as cores, the stability of volatile drugs is improved through an inclusion technology, and the volatile drugs are entrapped in a pH intelligent response type enteric coating material composed of aromatic ring-containing vinyl monomers, ethyl acrylate, DMAEMA and MAA. The traditional Chinese medicine preparation has the synergistic effect of efficiently inducing diuresis, activating blood circulation and eliminating tumors and enteric-coated long-acting directional delivery, and is suitable for patients with pleural effusion and peritoneal effusion, especially malignant effusion.

The purpose of the present disclosure is to produce and provide a burdock seed oil-containing composition that is excellent in stability. The present disclosure relates to a composition containing (A) burdock seed oil and (B) triethyl citrate and containing 1 to 7.5 mass % of arctigenin derived from the component (A), and a method for producing the same.

The invention discloses a ternary composition for stabilizing urea. The ternary composition comprises the following components in percentage by weight: 0.1-20% of urea; the sodium hyaluronate is selected from sodium hyaluronate, hydrolyzed sodium hyaluronate or a combination of the sodium hyaluronate and the hydrolyzed sodium hyaluronate; 0.01 to 3% by weight of triethyl citrate and water; wherein the weight ratio of the sodium hyaluronate to the triethyl citrate is (0.4-2.5): 1. The invention also relates to a preparation method of the ternary composition for stabilizing urea, and application of a combination containing sodium hyaluronate and triethyl citrate in stabilizing urea.

The present invention relates to the technical field of bioresins, and more specifically, to a sustainable biodegradable bioresin modified with natural plant oils and a preparation process thereof. The bioresin comprises the following raw materials: 30-60 parts by weight of modified corn oil, 5-15 parts by weight of a cross-linking agent, 0.5-3 parts by weight of benzoyl peroxide, 5-15 parts by weight of triethyl citrate, 10-30 parts by weight of regenerated cellulose fiber, 0.5-2 parts by weight of 2-hydroxy-4-n-octyloxybenzophenone, and 0.5-2 parts by weight of triphenyl phosphite. N-butylpyridinium tetrafluoroborate promotes double bond isomerization reaction, changing the position or type of double bonds in fatty acid chains, thereby generating a more stable molecular structure. The stability of this structure allows for tighter connections between molecular chains, effectively transferring stress and significantly improving tensile strength.

Described herein are pharmaceutical compositions comprising extended-release pellets and optionally delayed release pellets, wherein each of the extended-release pellets and each of the delayed release pellets comprises a drug pellet and an outer coating; the outer coating of the extended-release pellets is an extended-release outer coating; the outer coating of the delayed release pellets is a delayed release outer coating; the outer coating of the extended-release pellets is an extended-release outer coating; the outer coating of the delayed release pellets is a delayed release outer coating; the drug pellet comprises about 15 wt.% to about 25 wt.% ibudilast, about 60 wt.% to about 70 wt.% sugar sphere, about 5 wt.% to about 10 wt.% hydroxypropyl methylcellulose, and about 4 wt.% to about 8 wt.% silicon dioxide; the extended-release outer coating comprises about 20 wt.% to about 55 wt.% ethyl cellulose, about 20 wt.% to about 55 wt.% hydroxypropyl methylcellulose, about 1 wt.% to about 4 wt.% triethyl citrate, and about 20 wt.% to about 25 wt.% talc, wherein the weight percentages of ethyl cellulose, hydroxypropyl methylcellulose, triethyl citrate, and talc are based on total weight of the extended-release outer coating; and the delayed release outer coating comprises about 55 wt.% to about 65 wt.% copolymer of methacrylic acid and ethyl acrylate, about 3 wt.% to about 9 wt.% triethyl citrate, and about 25 wt.% to about 35 wt.% talc, wherein the weight percentages of the copolymer of methacrylic acid and ethyl acrylate, triethyl citrate, and talc are based on total weight of the delayed release outer coating.

The invention relates to a medical liquid dressing capable of forming a film and easy to peel and a preparation method thereof.The liquid dressing is prepared from, by mass, 1-20 parts of a modified film-forming agent, 0.01-5 parts of a plasticizer and 62-95 parts of a polar solvent, the modified film-forming agent is polyvinyl alcohol subjected to alkyl hydrophobic modification, and the polar solvent is polyvinyl alcohol subjected to alkyl hydrophobic modification. The plasticizer is a mixture of triethyl citrate and cyclohexane 1, 2-diisononyl diformate, and the plasticizer is a mixture of triethyl citrate and cyclohexane 1, 2-diisononyl diformate. Furthermore, a functional surfactant and micron-sized inorganic particles are respectively added, so that the large-size stripping performance and the air permeability and seepage drainage promoting performance of the liquid dressing can be respectively improved in a targeted manner; and the prepared liquid dressing has good film-forming property, easy stripping property and high air permeability. The wound dressing is applicable to protection of various wounds, and can prevent infection and promote wound healing while protecting the wounds. The liquid dressing disclosed by the invention is simple in composition, universal in preparation method and low in cost, and also has a good application prospect in other biomedical fields.

The invention relates to the technical field of cigarette filter stick paper, in particular to paper filter stick paper for cigarettes and a preparation method thereof, and the paper filter stick paper comprises the following raw materials in parts by weight: 250-300 parts of water, 35-40 parts of a first base material, 30-35 parts of a second base material, 6-8 parts of glycerol, 2-3 parts of triethyl citrate, 8-12 parts of aluminum hydroxide, 2-4 parts of citric acid and 8-12 parts of an additive. According to the invention, the corn starch selectively oxidized by sodium periodate is used as a first base material, and the bamboo pulp fiber subjected to fine treatment is used as a second base material, so that the traditional cellulose acetate is completely replaced, the biodegradation rate of the filter stick in the environment is obviously accelerated, and the pollution problem caused by material inertia is fundamentally solved.

A filter tip for a smoking article and a smoking article are provided. A filter for a smoking article comprises: a lyocell tow comprising lyocell fibers and a phenol-based reducing substance dispersed in the lyocell tow; the phenol-based reducing substance includes a phenol-based reducing substance, a phenol-based reducing substance, and a phenol-based reducing substance, wherein the phenol-based reducing substance includes triethyl citrate; tEC), and the content of the triethyl citrate per 1 mm length of the lyocell tow is 0.11 mg to 1.85 mg.

The invention provides a preparation method of a waterborne polyurethane emulsion without a volatile solvent, and belongs to the technical field of material preparation. The preparation method comprises the following steps: taking polyether glycol, hexamethylene diisocyanate and 2, 2-dimethylolpropionic acid (DMPA) as raw materials, taking dibutyltin dilaurate as a catalyst, carrying out one-pot polymerization in a specific reaction medium triethyl citrate, and carrying out pH regulation and emulsification to obtain the stable waterborne polyurethane emulsion. The prepared emulsion can form a transparent polyurethane material with good mechanical properties after being dried, the boiling point of triethyl citrate exceeds 250 DEG C, and the transparent polyurethane material has good stability in daily life. According to the preparation method of the waterborne polyurethane, no volatile solvent exists in the whole process, the adopted functional components are safe in source, the treatment process is simple and convenient, and a thought can be provided for development of synthesis of a green solvent-free waterborne polyurethane solution so as to meet the requirement of green sustainable development.