622 results about "Cyclopentane" patented technology

Methods and compositions for stimulating the growth of hair are disclosed wherein said compositions include a cyclopentane heptanoic acid, 2-cycloalkyl or arylalkyl compound represented by the formula I wherein the dashed bonds represent a single or double bond which can be in the cis or trans configuration, A, B, Z, X, R1 and R2 are as defined in the specification. Such compositions are used in treating the skin or scalp of a human or non-human animal. Bimatoprost is preferred for this treatment.

Provided are liquid crystal compounds and mixtures incorporating the same. The liquid crystal compounds of the invention generally comprise a cyclopentane group and at least two other rings. In one embodiment, the liquid crystal compounds of the invention comprise a cyclopentane group and at least two other rings, one of which is a fused ring system. A formula (I) is shown in the description.

A high-content environmental-protecting alcohol ether fuel for vehicle consists of additives and methanol or alcohol 75-87 proportion. The additives contain methanol, alcohol, isopropyl alcohol, isobutanol, dimethylcuprate, n-amyl alkyl, dipropyl, cyclopentane, nitro-methane, dimethyl benzene, pinecone oil, cyclopentadienyl, poly-isobutylene, propane diamine, carbomethoxy formate, dimethoxyester carbonate, natural gasoline, hydrocarbon solvent oil, diisopropyl ester, dimethoxy-methane, petroleum ether, methyl tert-amyl ether, tert-amyl tert-butyl ether, lauryl phenol poly-ethenoxy ether, anti-static agent, metal-corrosive inhibitor, rubber plastic swelling inhibitor and anti-oxidant. It's clean and universal; it has excellent burning stability, shock resistance and dynamic character and less oil consumption.

Azeotropic or azeotrope-like compositions are disclosed. The azeotropic or azeotrope-like compositions are mixtures of E-1,1,1,4,4,5,5,5-Octafluoro-2-pentene with methyl formate, n-pentane, 2-methylbutane, 1,1,1,3,3-pentafluorobutane, trans-1,2-dichloroethylene, 1,1,1,3,3-pentafluoropropane, dimethoxymethane, cyclopentane or Z-1,1,1,4,4,4-hexafluoro-2-butene. Also disclosed is a process of preparing a thermoplastic or thermoset foam by using such azeotropic or azeotrope-like compositions as blowing agents. Also disclosed is a process of producing refrigeration by using such azeotropic or azeotrope-like compositions. Also disclosed is a process of using such azeotropic or azeotrope-like compositions as solvents. Also disclosed is a process of producing an aerosol product by using such azeotropic or azeotrope-like compositions as propellants. Also disclosed is a process of using such azeotropic or azeotrope-like compositions as heat transfer media. Also disclosed is a process of extinguishing or suppressing a fire by using such azeotropic or azeotrope-like compositions. Also disclosed is a process of using such azeotropic or azeotrope-like compositions as dielectrics. Also disclosed is a process for the separation of a chemical compound from a mixture of two or more chemical compounds using such azeotropic or azeotrope-like compositions.

Azeotropic or azeotrope-like compositions are disclosed. The azeotropic or azeotrope-like compositions are mixtures of Z-1,1,1,4,4,4-hexafluoro-2-butene with methyl formate, pentane, 2-methylbutane, 1,1,1,3,3-pentafluorobutane, trans-1,2-dichloroethylene, 1,1,1,3,3-pentafluoropropane, dimethoxymethane, or cyclopentane. Also disclosed is a process of preparing a thermoplastic or thermoset foam by using such azeotropic or azeotrope-like compositions as blowing agents. Also disclosed is a process of producing refrigeration by using such azeotropic or azeotrope-like compositions. Also disclosed is a process of using such azeotropic or azeotrope-like compositions as solvents. Also disclosed is a process of producing an aerosol product by using such azeotropic or azeotrope-like compositions. Also disclosed is a process of using such azeotropic or azeotrope-like compositions as heat transfer media. Also disclosed is a process of extinguishing or suppressing a fire by using such azeotropic or azeotrope-like compositions. Also disclosed is a process of using such azeotropic or azeotrope-like compositions as dielectrics.

A method to electrolytically polymerize aromatic hydrocarbons and oxidize cyclopentane structures within the hydrocarbons into cyclopentanone structures is disclosed including a method to electrolyze fluorene in the presence of an ester to produce poly(9-fluorenone). A method to electrolytically oxidize polymers having cyclopentane structures to polymers having cyclopentanone structures is also disclosed including a method to electrolyze poly(fluorene) to produce poly(9-fluorenone). In addition, a method to chemically oxidize polymers containing cyclopentane structures into polymers containing cyclopentanone structures is disclosed, including a method to oxidize poly(fluorene), with a chemically prepared oxidizing agent, to produce poly(9-fluroenone).

Foam-forming compositions containing azeotropic or azeotrope-like mixtures containing cis-1,1,1,4,4,4-hexafluoro-2-butene are disclosed. The foam-forming composition contains (a) an azeotropic or azeotrope-like mixture of cis-1,1,1,4,4,4-hexafluoro-2-butene with methyl formate, 1,1,1,3,3-pentafluorobutane, trans-1,2-dichloroethylene, pentane, isopentane, cyclopentane, HFC-245fa, or dimethoxymethane; and (b) an active hydrogen-containing compound having two or more active hydrogens. Also disclosed is a closed-cell polyurethane or polyisocyanurate polymer foam prepared from reaction of an effective amount of the foam-forming composition with a suitable polyisocyanate. Also disclosed is a process for producing a closed-cell polyurethane or polyisocyanurate polymer foam by reacting an effective amount of the foam-forming composition with a suitable polyisocyanate.

The extraction rectification separation method for normal hexane and methyl cyclopentane comprises: adding the industrial hexane and dimethyl phthalate into the tower with given ratio; after separation, there is high-purity normal hexane on tower top, solution and methyl cyclopentane on tower kettle; putting the material in kettle to solution for distillation with methyl cyclopentane on tower top for further refine; recycling the solution. Wherein, the ratio is 1:3~5. This invention has recycle ratio more than 90% with purity more than 98%, and has no pollution.

A method for producing polyisocyanurate insulation foams, the method comprising contacting an A-side stream of reactants that includes an isocyanate with a B-side stream of reactants that include a polyol and a blowing agent, where the blowing agent includes isopentane and n-pentane in a substantial absence of cyclopentane.

An object of the invention is to provide copolymers which have a double bond in a side chain and are substantially free of unsaturated bonds in the main chain, copolymers which have a cyclic structure and are substantially free of unsaturated bonds in the main chain, and processes for economically synthesizing these copolymers.

A copolymer of the invention is obtained by copolymerizing at least ethylene and a conjugated diene. In the copolymer, structural units derived from the conjugated diene represent 1 to 90 mol %. Structural units resulting from 1,2-addition of the conjugated diene and having a side-chain double bond represent 0 to 90 mol %, structural units resulting from 1,4-addition of the conjugated diene represent 0 to 3 mol %, structural units resulting from 1,3-addition of the conjugated diene represent 0 to 3 mol %, and the total of structural units resulting from 1,2-addition of the conjugated diene and having a 1,2-cyclopropane skeleton and structural units resulting from 1,2-addition of the conjugated diene and having a 1,2-cyclopentane skeleton represent 4 to 100 mol %.

Disclosed are paraffin inhibitors prepared by admixing a polymer having the characteristic of inhibiting paraffin crystalline growth in formation fluid from oil and gas wells with a first solvent selected from the weak to moderate wax solvents and a second solvent selected from the strong wax solvents. Exemplary weak to moderate wax solvents include benzene, toluene, xylene, ethyl benzene, propyl benzene, trimethyl benzene and mixtures thereof. Exemplary strong wax solvents include cyclopentane, cyclohexane, carbon disulfide, decalin and mixtures thereof. The solvent system disclosed has desirably better solubility with the polymers, even at reduced temperatures, than either solvent alone. It is emphasized that this abstract is provided to comply with the rules requiring an abstract which will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure. It is submitted with the understanding that it will be used to interpret or limit the scope or meaning of the claims. 37 CFR 1.72(b)

The invention discloses premixed polyether polyol, a polyurethane raw material composition, foam and a preparation method and application of the foam. The premixed polyether polyol comprises, by mass, 30-50 parts of polyether polyol YD1050, 30-50 parts of polyether polyol SA380, 20-30 parts of polyether polyol SD7100, 2-3 parts of foam stabilizer, 2-3 parts of catalyst, 1.5-2.5 parts of water and 17-19 parts of foaming agent. The foaming agent is a mixture of cyclopentane and HFC-245fa. As the varieties of the premixed polyether polyol are specifically selected, the obtained polyurethane foam material is excellent in performance, the compression strength is higher, the low-temperature dimensional stability is better, and the heat conductivity coefficient is lower. The rigid polyurethane foam can be applied to insulating layers of refrigerators or freezers or refrigerated containers.

The invention disclosed an aryl nitrile group thiazole derivative for inhibiting the activity of xanthine oxidase, a method for preparing the same and application thereof. In the aryl nitrile group thiazole, R1 is methyl, ethyl, propyl, isopropyl, isobutyl, methyl cyclopropane, methyl cyclobutane, isoamyl, methyl cyclopentane, methyl cyclohexane or aromatic ring methyl, R2 is methyl or trifluoromethyl, and R3 is formic acid, sodium formate, potassium formate, lithium formate, methyl formate, or ethyl formate. Simultaneously, the invention discloses a method for synthesizing the aryl nitrile group thiazole derivative by using inexpensive raw materials, which has the advantages of simple operation, high yield, easy purification of products, application to industrial production and the like, and can obtain an efficient compound with low toxicity through screening; besides, the effective compound is expected to be widely applied to inhibit the activity of the xanthine oxidase required on animals and humans, and to become a new generation of antigout drugs and hyperuricemia drugs with special effect.

The present invention discloses a phenanthrene derivative having the following structure:

wherein Ar₁ and Ar₂ independently are phenyl, nathphyl, heterocyclic group, polycyclic aromatic or polycyclic heterocyclic group with at least one conjugated substituent. The conjugated substituent can be an electron withdrawing group or electron donating group. The phenanthrene derivatives have semiconductor properties of electron transfer, electroluminescence (EL), and photoluminescence (PL). Intermolecular stacking can be avoided and electron-luminescent emission stability is enhanced when the derivatives are applied as a light-emitting material in organic EL devices due to the presence of the two stereo cyclopentane rings, such as a host compound or a dopant emitting blue light.

The chloroprene rubber adhesive is prepared with chloroprene rubber, cyclopentane-B solvent, methyl ethyl ketone, ethyl acetate, No. 120 solvent gasoline, tert-butyl phenolic resin, magnesium oxide, zinc oxide and benzoic acid-water catalyst. The present invention uses no toxic benzene solvent, and has less environmental pollution and harm to human body, and the product has good brushing performance, high adhesive strength, high lasting property and other advantages.

The invention relates to a halogen-free flame-retardant polyurethane hard bubble heat preserving material and a preparation method thereof. The heat preserving material consists of a component A and a component B, wherein the weight ratio of the component A to the component B is 1:(1.0-1.3); the component A consists of 75-90 parts by weight of polyether polyol, 0.5-5 parts by weight of a catalyst, 1-5 parts by weight of cyclopentane serving as a foaming agent, 0.5-3 parts by weight of a foam stabilizer and 10-40 parts by weight of a halogen-free flame retardant; and the component B is polymerized polyisocyanate. The preparation method comprises the following steps of: uniformly mixing an expansion flame retardant, an inorganic hydroxide and a polymer/inorganic nanomaterial to obtain a halogen-free flame retardant component; uniformly mixing the polyether polyol, catalyst, foaming agent and foam stabilizer, adding the halogen-free flame retardant component, and continually mixing uniformly at the normal temperature to obtain a component A; and mixing the component A with a component B by stirring, and foaming to obtain the halogen-free flame-retardant polyurethane hard bubble heat preserving material. The method is simple and convenient, and has high practicability; the obtained flame-retardant heat preserving material has a high fireproof level; and the heat preserving material is environment-friendly, and is superior to the conventional organic flame-retardant heat preserving material in the market.

Methods and compositions for forming polyurethane foam. A method for manufacturing an aromatic polyester polyol comprises heating a glycol, a dicarboxylic acid or ester, functionality enhancing agent, and a natural oil to about 480° F. to form a reaction product, allowing the reaction product to cool to about 140° F., and adding additional glycol to form an aromatic polyester polyol composition, wherein the total glycol comprises less than about 36 weight percent of the polyol composition. An aromatic polyester polyol composition comprises a glycol, a dicarboxylic acid or ester, functionality enhancing agent, and a natural oil, wherein the total glycol comprises less than about 36 weight percent of the aromatic polyester polyol composition. An aromatic polyester polyol composition comprising a cyclopentane solubility of at least about 25 percent, a hydroxyl number of at least about 150, the natural oil comprising less than about 25 weight percent, and/or the dicarboxylic acid or ester comprising more than about 29 weight percent of the polyol composition.