205 results about "Nitrate ester" patented technology

A pharmaceutical composition comprising a co-crystal of an API and a co-crystal former; wherein the API has at least one functional group selected from ether, thioether, alcohol, thiol, aldehyde, ketone, thioketone, nitrate ester, phosphate ester, thiophosphate ester, ester, thioester, sulfate ester, carboxylic acid, phosphonic acid, phosphinic acid, sulfonic acid, amide, primary amine, secondary amine, ammonia, tertiary amine, sp2 amine, thiocyanate, cyanamide, oxime, nitrile diazo, organohalide, nitro, s-heterocyclic ring, thiophene, n-heterocyclic ring, pyrrole, o-heterocyclic ring, furan, epoxide, peroxide, hydroxamic acid, imidazole, pyridine and the co-crystal former has at least one functional group selected from amine, amide, pyridine, imidazole, indole, pyrrolidine, carbonyl, carboxyl, hydroxyl, phenol, sulfone, sulfonyl, mercapto and methyl thio, such that the API and co-crystal former are capable of co-crystallizing from a solution phase under crystallization conditions.

A pharmaceutical composition comprising a co-crystal of an API and a co-crystal former; wherein the API has at least one functional group selected from ether, thioether, alcohol, thiol, aldehyde, ketone, thioketone, nitrate ester, phosphate ester, thiophosphate ester, ester, thioester, sulfate ester, carboxylic acid, phosphonic acid, phosphinic acid, sulfonic acid, amide, primary amine, secondary amine, ammonia, tertiary amine, sp2 amine, thiocyanate, cyanamide, oxime, nitrile diazo, organohalide, nitro, s-heterocyclic ring, thiophene, n-heterocyclic ring, pyrrole, o-heterocyclic ring, furan, epoxide, peroxide, hydroxamic acid, imidazole, pyridine and the co-crystal former has at least one functional group selected from amine, amide, pyridine, imidazole, indole, pyrrolidine, carbonyl, carboxyl, hydroxyl, phenol, sulfone, sulfonyl, mercapto and methyl thio, such that the API and co-crystal former are capable of co-crystallizing from a solution phase under crystallization conditions.

A pharmaceutical composition comprising a co-crystal of an API and a co-crystal former; wherein the API has at least one functional group selected from ether, thioether, alcohol, thiol, aldehyde, ketone, thioketone, nitrate ester, phosphate ester, thiophosphate ester, ester, thioester, sulfate ester, carboxylic acid, phosphinic acid, phosphonic acid, sulfonic acid, amide, primary amine, secondary amine, ammonia, tertiary amine, imine, thiocyanate, cyanamide, oxime, nitrile diazo, organohalide, nitro, S-heterocyclic ring, thiophene, N-heterocyclic ring, pyrrole, 0-heterocyclic ring, furan, epoxide, peroxide, hydroxamic acid, imidazole, pyridine and the co-crystal former has at least one functional group selected from amine, amide, pyridine, imidazole, indole, pyrrolidine, carbonyl, carboxyl, hydroxyl, phenol, sulfone, sulfonyl, mercapto and methyl thio, such that the API and co-crystal former are capable of co-crystallizing from a solution phase under crystallization conditions.

Compounds and methods for mitigating neurodegeneration, effecting neuroprotection and / or effecting cognition enhancement in a subject are described. Neurological or cognitive conditions are treated by administering to a subject an effective amount of a therapeutic compound comprising a nitrate ester, or a pharmaceutically acceptable salt or ester thereof.

The invention relates to a nitric acid ester drug for inhibiting the regeneration of blood vessels. The drug is the compound 1, ester or salt of the compound with the following general formula: T-(B-O-NO2)t1, wherein t1 is 1 or 2; T-H is a steroids compound; T is a residual steroids radial of the compound 1 after removing H, and T and H are connected in the form of O-H, namely connecting an oxygen atom on T and H, to form a hydroxide radical The compound is used for preparing the drug for treating tumor and ocular neovascularization disease.

The invention relates to a nitrine solid propellant and a preparation process thereof. The preparation process comprises the following steps: by taking nitrine polyether glycol or polyhydric alcohol as an adhesive, nitrate as a plasticizer, terminal alkynyl polyether or terminal alkynyl polyester as an alkynyl curing agent and diisocyanate or polyisocyanate as an isocyanate curing agent, carryingout Huisgen 1,3-dipolar cycloaddition reaction on nitrinyl of a side chain of a nitrine polyether adhesive and the terminal alkynyl polyether or terminal alkynyl polyester to form a polyurethane elastomer containing a triazole ring; and introducing a Huisgen click chemosetting system based on a polyurethane curing system. The invention relates to the nitrine solid propellant. The propellant has apolyurethane curing mode and a click chemosetting mode at the same time. The prepared propellant has more excellent tensile strength and modulus on the premise of keeping relatively high elongation. The propellant has good mechanical property and structural stability.

The invention discloses a combustion-restricted layer formula applied to an NEPE (Nitrate Ester Plasticized Polyether) propellant. The combustion-restricted layer formula comprises the following components in percentage by mass: 51-74 percent of adhesive, 9-12 percent of a curing agent, 8-22 percent of reinforcing filler, 3-5 percent of an anti-aging agent, 5-8 percent of a network regulator and 1-2 percent of a curing catalyst, wherein the adhesive refers to a hydroxyl-terminated polymer; the curing agent refers to an isocyanate compound; the reinforcing filler refers to an inorganic compound; the anti-aging agent refers to an aromatic compound; the network regulator refers to a compound which contains at least two functional groups; and the curing catalyst refers to an organic metal compound. The combustion-restricted layer formula disclosed by the invention has the characteristics of good processing property, room temperature curing property, adjustable curing time and excellent overall performance and is applied to end face cladding of a high-energy propellant engine.

An object is to provide a method for operating a compression ignition internal combustion engine which, using a single fuel, can produce diesel combustion when the load is high, or homogeneous-charged compression ignition combustion when the load is low. The operating method includes: employing a fuel containing 95 to 99.5 wt. % of a base fuel made of one or more compounds selected from the group consisting of a hydrocarbon, an alcohol, an ether and a fatty ester, and 0.1 to 5 wt. % of an additive made of one or more compounds selected from the group consisting of an organic peroxide, a nitric ester, a nitrite ester and an azo compound; and producing diesel combustion when the load is high, or homogeneous-charged compression ignition combustion when the load is low. The organic peroxide is di-tert-butyl peroxide. The nitric ester is n-pentyl nitrate. The nitrite ester is n-pentyl nitrite. The azo compound is 2,2-azobis(2,4-dimethylvaleronitrile).

The invention relates to a method for preparing 6-chloro-3-aminotoluene-4-sulfoacid (hereinafter referred to as CLT acid) in a direct nitrification way by taking o-chlorotoluene as a raw material. The method comprises the following steps of: obtaining o-chlorotoluene nitrate by taking acidic Beta zeolite as a catalyst and acetyl nitrate as a nitrifying agent; reducing the o-chlorotoluene nitrate by utilizing iron powder; recrystallizing the reduced product and separating out 6-chloro-3-aminotoluene crystal and 6-chloro-4-aminotoluene containing little 6-chloro-3-aminotoluene by adopting an acid extraction method; adding dichlorobenzene and sulfuric acid in the 6-chloro-3-aminotoluene crystal, and carrying out sulfonation at 170-190 DEG C to obtain the CHLOROT acid; and carrying out sulfonation on the 6-chloro-4-aminotoluene containing little 6-chloro-3-aminotoluene to obtain 2B acid containing little CLT acid. The invention has the characteristics of low pollution, high yield, simple process, low device requirements, and the like.

The invention relates to an additive of fuel, in particular to an additive of high-proportion methanol gasoline, such as M50 methanol gasoline. The additive is characterized in that the additive in the total volume ranging from 2% to 5% is added into the methanol gasoline and consists of 60% to 70% of mutual solvent formed by compounding alcohols, alcohol ethers, esters and acetones according to optional proportion, 24.4% to 30% of ignition agent formed by compounding fatty hydrocarbons, aromatic hydrocarbons and methyl tertiary butyl ether according to optional proportion, 4% to 6% of combustion improver formed by compounding nitryls and nitrate esters according to optional proportion, 1% to 3% of corrosion inhibitor formed by compounding phenols and grease according to optional proportion, and catalyst and anti-oxidant stabilizer in proper quantity. By the aid of the additive, the service life of a gasoline tank can be prolonged evidently, methyl alcohol system of the gasoline can be effectively guaranteed against being deteriorated and layered easily, and the problems of poor startability and power performance and the like can be solved effectively. The additive is rich in raw material sources, simple in production process and procedures and convenient in use and popularization.

The invention relates to a method for preparing superhigh-viscosity energy-containing cellulose nitrate and belongs to the technical field of cellulose ester preparation. The technical scheme of the invention is as follows: adding refined cotton in mixed acid at the temperature of 10-20 DEG C, and washing after nitration reaction so as to obtain nitrated refined cotton, wherein the mixed acid contains 26.00wt%-35.00wt% of nitric acid, 45wt%-61wt% of sulfuric acid and 13.00wt%-20.00wt% of water; after washing, boiling and washing the nitrated refined cotton at the temperature of 80-90 DEG C, and shredding so as to obtain cellulose nitrate with a nitration degree of above 194ml / g and a viscosity (an acetone solution containing 3% cellulose nitrate) of more than 6000mpa.s. The method can be used for production of gelatine explosives for underwater blasting.

Disclosed is a process for the synthesis of Nicorandil (1), 2-(nicotinamide)ethyl nitrate, starting from N-(2-hydroxyethyl)nicotinamide (15), using nitration with nitric acid in the presence of acetic anhydride Said synthesis method is particularly advantageous because it solves the safety problems involved in the use of nitric acid as nitrating agent, and allows a product with excellent yields and quality to be isolated.

The present invention relates to a new process for preparing 6-carboxy-cellulose nitrates and also to their use.

The invention belongs to the technical field of nitrocotton production methods, and particularly relates to a method for preparing cellulose nitrate from bamboo fibers. The method provided by the invention realizes diversification of raw materials in the production of nitrocellulose, and comprises the following steps: 1) dissolving the bamboo fibers in water; 2) adding sodium hypochlorite for chlorination, and controlling the pH value to be less than or equal to 2; 3) filtering, and adding a 0.1-0.3wt% sodium hydroxide solution into the filter residue; 4) filtering, and adding a 0.05-0.3wt% sodium hypochlorite solution into the filter residue; 5) filtering, adding water into the filter residue and controlling the pH value to be less than or equal to 3.5; 6) washing and drying to obtain the pretreated bamboo fibers; 7) mixing 100 parts by weight of pretreated bamboo fibers and 2,500-6,000 parts by weight of mixed acid at the temperature of 33-47 DEG C, wherein the reaction lasts for 38-50 minutes; and 8) boiling, washing and drying to obtain the cellulose nitrate. The method provided by the invention widens the application range of the raw materials in the production of nitrocellulose, and the prepared cellulose nitrate is applied to the military and civil fields according to different nitrogen contents respectively.

The invention relates to a method for improving interface adhesive property of an HTPB (hydroxyterminated polybutadiene) liner and an NEPE (Nitrate Ester Plasticized Polyether) high-energy propellant. The method comprises the following step: adding a curing catalyst in the HTPB liner, wherein the curing catalyst is one or a combination of triphenyl bismuth (TPB), iron naphthenate, magnesium naphthenate, zinc naphthenate, zinc isoocatanoate, calcium naphthenate or stannous octoate, wherein the adding amount of the curing catalyst accounts for 0.3-2.5 percent the total weight of the HTPB liner. According to the method, the proper curing catalyst is added in the HTPB liner so that the migration loss of the curing catalyst in the interface propellant is compensated, the curing speed of the interface propellant is kept, the adverse influence of external factors to curing and mechanical property of the interface propellant is reduced, and the interface adhesive property of the liner and the propellant is remarkably improved.

The invention relates to a determination method for migration components in an NEPE propellant bonding system used in the field of aviation fuels. The determination method comprises the following experimental steps: preparation of a to-be-detected sample; determination of detection objects and detection conditions; drafting of an external standard calibration curve; formation of a detection data list; etc. According to the method, a plurality of migration components in the NEPE propellant bonding system are detected, wherein the components comprise a plasticizer nitroglycerine (ND), a plasticizer butanetriol trinitrate (BTTN), an amine stabilizing agent (AD) and a curing catalyst triphenyl bismuth (TPB). The determination method is extensively applicable to qualitative and quantitative detection of a solid rocket and an energetic material used in space and missile technologies and can effectively reduce sample treatment risks, simplify the process of measurement and analysis, reduce data processing errors and save experimental expenses for detection. Moreover, the following advantages are obtained: the determination method is simple and practicable, experimental process is convenient to popularize, repeatability of detection data is good, and data processing is accurate and reliable.

The invention relates to a printable hot stamping layer and a preparation method thereof, and the printable hot stamping layer adopts the following components and is prepared according to the following parts by weight: 15-25 parts of modified polyurethane resin, 3-10 parts of furfural polyketone resin, 10-20 parts of thermoplastic acrylic resin, 1-12 parts of cellulose nitrate, 2-5 parts of cellulose resin, 0-10 parts of polyvinyl butyral, 30-60 parts of butanone, 5-10 parts of ethyl acetate, 5-10 parts of n-propyl ester, 1-2 parts of reaction initiator and 0.5-1 part of reaction terminator. The method comprises the following steps: 1) firstly pouring all solvents into a reaction kettle according to the requirements of the formula, heating to 50-80 DEG C and stirring; 2) keeping stirring, sequentially pouring polyurethane resin, furfural polyketone resin, modified acrylic resin, cellulose nitrate, cellulose resin and polyvinyl butyral into the reaction kettle, dripping the reaction initiator into the reaction kettle within 1 hour, and continuously stirring for 2.0-3.0 hours; 3) detecting the infrared spectrum and adding the reaction terminator; 4) measuring the solid content, and adjusting to the theoretical value; and 5) slowly stirring and cooling to 20 DEG C. The printable hot stamping layer is characterized by good printing effect after hot stamping, environmental protection and the like.

The invention discloses a high-ratio methanol fuel composite additive for vehicles. The composite additive is prepared from the following raw materials in percentage by mass: 50-70% of aliphatic ester, 10-30% of nitrate, 5-10% of glycerol, 5-10% of benzotriazole and 5-10% of high carbon alcohol. According to the high-ratio methanol fuel composite additive, the aliphatic ester of which the carbon chain number is about 18 is adopted, and the lubricating property, corrosion resistance and wear resistance of the methanol fuel for vehicles can be greatly improved. The nitrate is an excellent ignition improver and combustion improver, and the glycerol, benzotriazole and high carbon alcohol are excellent corrosion inhibition components and cosolvents. According to the methanol fuel composite additive for vehicles prepared by mixing the substances, the performance of the fuel is greatly improved.

The object of the present invention is to provide an oxygen isotope concentration method capable of concentrating the stable oxygen isotopes of 17O and 18O which can be carried out using a simple device configuration. The present invention relates to a method for concentrating an oxygen isotope in separated oxygen by irradiating ozone with light, selectively dissociating an isotopomer of ozone containing an oxygen isotope in its molecule into oxygen, followed by dissociating the ozone and separating the formed oxygen from the non-dissociated ozone. The basic configuration of the device is provided with an ozone formation unit 11 that forms ozone from raw material oxygen, an ozone separation unit 12 that separates ozone formed with said ozone generation unit and raw material oxygen, an ozone photodissociation unit 13 that radiates light of a specific wavelength onto the ozone separated by said ozone separation unit 12 and selectively dissociates ozone containing an oxygen isotope in its molecule into oxygen, and an oxygen separation unit that separates the oxygen formed by dissociating ozone in said ozone photodissociation unit 13 and non-dissociated ozone to concentrate the oxygen isotope in the oxygen. The present invention also relates to a method for concentrating an oxygen isotope comprising an ozone photodissociation step, in which light is radiated onto a rare gas-ozone mixed gas containing ozone and at least one type of rare gas selected from krypton, xenon and radon to selectively dissociate ozone containing a specific oxygen isotope in its molecule into oxygen, and an oxygen isotope concentration step, in which the oxygen separated from ozone in said ozone photodissociation step is separated from non-dissociated ozone and rare gas to concentrate the oxygen isotope present in the separated oxygen. An oxygen isotope may also be concentrated in a dissociation reaction product by irradiating a gas containing a peroxide selected from hydroperoxides, (di)alkyl peroxides, peroxyacids including peracids, (di)acyl peroxides, peroxy esters, peroxycarbonates, peroxydicarbonates, diperoxycarbonates, peroxalates, cyclic peroxides, ozonides and endoperoxides, nitrite esters and nitrate esters, and selectively dissociating a peroxide containing a specific oxygen isotope in its molecule.

The invention discloses bile nitrate derivant in the Ia and Ib as drug composition of activated ingredient, which treats hepatitis virus, wherein R1 is trans- or cis-OH; R2 is H or OH; A is L- or D-serine, threonine or cysteine residue, cis- or trans-3-hydroxyproline or 4-hydroxyproline residue; X is oxygen or sulphur.

The invention discloses a Ti3C2-containing composite semipermeable membrane used for light evaporation of water, and a preparation method and application of the membrane. The method includes the following steps that 1, a Ti3AlC2 raw material is added into an etching agent, the mixture is stirred fully, suspension liquid is obtained, and the suspension liquid is subjected to centrifuging suspensionand drying in vacuum; 2, Ti3AlC2 powder and an intercalation solvent are mixed and stirred, and the mixture is subjected to centrifuging suspension and drying in vacuum so as to prepare the Ti3AlC2 powder with a layered structure; 3, cellulose nitrate is used for preparing a semipermeable membrane precursor solution; 4, the prepared Ti3AlC2 powder with the layered structure is added in the semipermeable membrane precursor solution, the mixture is stirred evenly, uniformly spread in a flat-base container, and then naturally dried, and Ti3C2-containing composite semipermeable membrane is obtained. According to the preparation method, the process is simple, the cost is low and the practicability is high. The photothermal conversion effect of the prepared composite semipermeable membrane is good, and the composite semipermeable membrane has a very good application prospect in many fields such as light evaporation of water and water desalination.

The invention discloses a stirring reaction device for producing carboxymethyl cellulose nitrate. The stirring reaction device comprises a tank body, and the tank body is provided with a shaking self-rotating frame. A motor is started to drive a turntable to rotate, the turntable drives the shaking self-rotating frame to revolve, and the shaking self-rotating frame is limited in a fixed frame through a limiting tube so that the shaking and revolving are realized. In revolving of the shaking self-rotating frame, the shaking self-rotating frame self-rotates through a gear and a ring-shaped rackmeshed with the gear so that the stirring is full and uniform and the reaction is promoted.

The invention discloses the azido dihydroxypropyl cellulose nitrate preparation method and synthesis which comprises, subjecting natural cotton and cellulose to alkalization under semi-homogeneous phase reaction condition, charging epoxy propyl alcohol for sectionwise etherification to the alkali cellulose, obtaining dihydroxy cellulose ether whose substitution degree is between 0.5-1.2, completely dissolving in dimethyl polyamide / 9% LiCl system, scouring, purifying, drying and dissolving in dimethyl sulfoxide, carrying out homogeneous phase nitrine at high temperature.

The invention relates to a method for preparing cellulose nitrate for an explosive from wood pulp, in particular relates to a preparation method of cellulose nitrate for an explosive and belongs to the technical field of cellulose preparation. The method is characterized by comprising the following steps: adding 20-30 parts by weight of wood pulp in 500 parts by weight of mixed acid, carrying outmiddle-low temperature nitration reaction and then washing; and then successively carrying out boil washing, shredding and refine washing so as to obtain the cellulose nitrate for the explosive. In the preparation method of the cellulose nitrate, the wood pulp is used as a raw material, which is not a precedent in the field of military cellulose nitrate, thereby broadening the use range of the raw material in nitrated cellulose production, and simultaneously, the wood pulp is cheaper than cotton linter and can be used as the raw material of energy-containing nitrated cotton for production, thereby greatly solving the cost problem of the raw material; and at the same time, the environmental protection pressure problem brought by a large amount of cotton dust, black liquid and acidic wastewater which are generated in the processes of cotton opening, boiling, bleaching and drying refined cotton when a nitrated cotton product is prepared by utilizing the cotton linter as the raw material is solved.

The invention discloses a dimethyl-carbonate-containing composition and a preparation method and application thereof. The dimethyl-carbonate-containing composition comprises the following components in percentage by weight: 40 to 86.8 percent of dimethyl carbonate, 3 to 15 percent of alkyl nitrate, 5 to 20 percent of alcohol of which the number of carbon atom is less than 6, 0.2 to 5 percent of ash-free dispersing agent and 5 to 20 percent of hydrotropy agent. The method for preparing the dimethyl-carbonate-containing composition comprises the following steps of: adding the dimethyl carbonate into a reaction kettle; adding the alkyl nitrate, the alcohol of which the number of carbon atom is less than 6, the ash-free dispersing agent and the hydrotropy agent while stirring; and dissolving completely to obtain finished products. The dimethyl carbonate-containing composition can serve as a three-way catalytic converter cleaning agent, and all-round cleaning of the whole automobile engine system is realized.

The invention discloses normal-temperature continuous production technology for a cetane number improver, which belongs to the technical field of the preparation of organic nitrate ester compounds, and comprises the steps of using nitramine or nitric acid and isooctanol to react under the action of a catalyst. The normal-temperature continuous production technology for the cetane number improver is characterized by changing concentrated sulfuric acid as the catalyst, using different proportions of the concentrated sulfuric acid, concentrated nitric acid and water to control different reaction temperatures and realize continuous production, returning waste acid to an acid distribution post for acid mixing according to the content of the acid, then circularly utilizing the waste acid, finally selecting a normal reaction temperature of between 8 DEG C below zero and 40 DEG C in order to the safety and the control of the purity and the yield of energy consumption and the like, and utilizing the proportion of acid mixing to control reaction rate to achieve optimum process conditions such as continuous recycling of the waste acid, continuous feeding nitrification and the like. The technology overcomes the disadvantages of unsteady quality of products, large potential safety hazard, high energy consumption and material consumption and the like, improves the yield, ensures that the quality of the products entirely and steadily reaches that of high-class products, and greatly improves the utilization efficiency of equipment.

The invention discloses a semiconductor chalcogenide-containing composite semi-permeable membrane used for water evaporation by light, a preparation method and a purpose thereof. The method comprises the following steps: 1) employing cellulose nitrate to prepare a semi-permeable membrane precursor solution; 2) adding the chalcogenide to the above precursor solution, violently stirring the materials to obtain a mixed solution; 3) spreading the above mixed solution on a container having a flat bottom, naturally drying the solution to form the membrane, and preparing the chalcogenide-containing semi-permeable membrane; 4) placing the chalcogenide-containing composite semi-permeable membrane in a silver nitrate solution for immersing for a while; and 5) taking the immersed chalcogenide-containing semi-permeable membrane out, naturally drying the material, and preparing the semiconductor chalcogenide-containing semi-permeable membrane. The method has the advantages of simple process and low cost; the provided semi-permeable membrane has good photo-thermal transition effect, and has very good application prospect in the fields of water evaporation by light and seawater desalination.

The invention discloses a hydroxyl-functionalized carbon nanotube used for polyurethane chain extender and a preparation method thereof. Firstly, a compound or a polymer, the terminal group of which is multi-hydroxyl, is used for synthesizing a compound or a polymer, the terminal group of which is provided with a nitrate ester group; and then the nitrate ester group is transformed into an azide group to obtain a compound or a polymer, the terminal of which is sealed by the azide group and the hydroxyl group simultaneously. Through the addition reaction between the azide group and a ring on the surface of the carbon nanotube, the compound or the polymer with the hydroxyl group is connected with the surface of the carbon nanotube by covalent bonds to realize the preparation of the hydroxyl-functionalized carbon nanotube. The surface of the hydroxyl-functionalized carbon nanotube prepared by the invention is connected with one hydroxyl or a plurality of hydroxyls; therefore, when being applied to the synthesis of polyurethane, the hydroxyl-functionalized carbon nanotube can function as polyurethane chain extender, the interface combining power between functionalized carbon nanotube and polyurethane matrix can be improved greatly, meanwhile, the existence of hydroxyl groups can well improve the dispersivity of the carbon nanotube in the polyurethane matrix.

The invention discloses a photocurable nitrate ester polyether and a synthesis method thereof. The structural formula of the photocurable nitrate ester polyether is shown in Formula (I), and the synthesis process comprises the following steps: the photocurable nitrate ester polyether is obtained by adding an isocyanoethyl methacrylate to hydroxyl-terminated poly-3-nitrate methyl-3-methyloxetane asa raw material. The photocurable nitrate ester polyether disclosed by the invention has a simple synthesis method, is easy to enlarge, and introduces a urethane group, which can impart good mechanical properties to a photocurable elastomer. The invention is primarily useful in composite solid propellants. (Formula (I) is shown in the specification), where n is an integer between 10 and 30.