3968 results about "Butadiene Dioxide" patented technology

A hydrogenated styrene butadiene star copolymer is incorporated in a lubricant additive package. The star copolymer can include about 3 to 25% and about 97 to 75% butadiene. The star copolymer may further be incorporated in a lubricant additive in the amount of about 12 wt % of the star copolymer as compared to the base oil.

An integral gasketed filtration cassette structure of a type comprising a filtration cassette fully or partially overcoated by a gasket layer, forming a fluid-tight seal between the filtration cassette and the filtration cassette holder to which the filtration cassette is to be affixed. The filtration cassette comprises filter sheets arranged in a multilaminate, peripherally bonded array, wherein the filter sheets alternate with permeate and retentate sheets. The gasket layer comprises an elastomeric material with suitable hardness and temperature resistance for sealing, such as silicone, ethylenepropylenedienemonomer (EPDM), viton, polyurethane, polypropylene, polyethylene, polyvinylchloride, polyester, epoxy, ethylvinylacetate, bunnas, and styrene butadiene. The filtration cassettes and filter of the invention may be advantageously employed for dewatering of aqueous biomass suspensions, desalting of proteins, removal of secreted metabolites from cellular suspensions, and the like.

An electric smoking system includes a cigarette including a cylindrical tobacco web partially filled with tobacco material to define a filled tobacco rod portion and an unfilled tobacco rod portion, and an electric lighter. The wrapper includes a filler of ammonium-containing compounds effective to reduce the gaseous constituents of the smoke produced during smoking. The system includes a pilot burner including at least one heating vane and a controller adapted to control heating of the heating vane. The lighter is configured to at least partially contain the cigarette such that the heater blade heats the heating region of the cigarette. Manipulating the controller to limit the heating of the heater blades to a predetermined temperature range which allows the delivery of the smoke generated when the portion of the tobacco rod is heated while at least reducing the amount of smoke present in the smoke as compared to smoking a cigarette having only calcium carbonate as filler. A gaseous component. The gaseous components that can be reduced include carbon monoxide, 1,3 butadiene, isoprene, acrolein, acrylonitrile, hydrogen cyanide, 0-toluidine, 2-naphthylamine, nitrogen oxide, benzene, NNN, Phenol, catechol, benzanthracene and benzopyrene.

The invention relates to a selective hydrogenation method of high unsaturated hydrocarbons in C4 fractions, which is characterized in that salvage stores which are rich in acetylene hydrocarbon and prepared by extracting butadiene are used as the material, and a fixed bed reactor is adopted to obtain 1, 3-budiene by selective hydrogenation under the existence of a catalyst. The adopted process conditions are as follows: the reaction temperature is between 30 DEG C and 90 DEG C, the reaction pressure is between 1.0 MPa and 4.0 MPa and the liquid space velocity is 7 to 20h<-1>. The catalyst is preferably a palladium system catalyst with alumina as a carrier, the specific surface is 50 to 150m<2>/g and the specific pore volume is 0.25 to 1.0ml/g. The method has remarkable good effects on reducing waste of resources and improving economic benefits by effectively utilizing the salvage stores rich in acetylene hydrocarbon and prepared by extracting butadiene.

A hot melt adhesive composition, comprising a blend of components including about 10% to about 40% by weight of an elastomeric block copolymer, preferably styrene-isoprene-styrene (SIS) or styrene-butadiene-styrene (SBS), about 15% to about 70% by weight of a first midblock tackifying resin having a softening point of at least about 110° C. and having an aromatic content of at least about 1.5% by weight; about 0 to 55% of second midblock tackifying resin, about 5% to about 35% by weight of a plasticizer; and about 0% to about 20% by weight of an end block resin having a softening point lower than 125° C.; wherein the components total 100% by weight of the composition, the viscosity of the composition is equal to or less than about 20,000 mPa.s at 120° C., and is applied at a temperature lower that 150° C. and initial bond retention of the composition on elastic strands is at least about 60%. Also, the elastic modulus G′ of the composition is higher than about 5000 Pa, the vicous modules G″ is higher than about 50 Pa, and the tan delta value is between about 0.5 and about 60. Laminates, especially those used in disposable soft goods, and methods of making such laminates are also described. The adhesive composition and/or laminate may be used in making a variety of end products such as a disposable diaper, a sanitary napkin, a bed pad, a bandage, a surgical drape, a tape, a label, a plastic sheet, a nonwoven sheet, a paper sheet, a cardboard, a book, a filter, or a package.

The invention belongs to the field of road engineering, and particularly relates to a hyperviscous and high-elastic asphalt modifier applicable to steel bridge deck pavement. The asphalt modifier comprises the following raw materials in parts by weight: 3-10 parts of junked tire rubber powder, 3-10 parts of polyethylene wastes, 3-8 parts of styrene-butadiene-styrene block copolymer, 1-5 parts of styrene-isoprene-styrene block copolymer, 1-5 parts of terpene resin, 5-10 parts of solvent naphtha, and 0.3-0.7 part of alcohol ether carboxylate adhesion agent. In addition, a modified asphalt and amodified asphalt mixture are prepared on the basis of the modifier, the 60 DEG C dynamic viscosity of the modified asphalt prepared by applying the modifier can reach more than 300000Pa.s, and the performance grading reaches PG 88-28; and the asphalt mixture has favorable water stability, higher dynamic modulus, higher track dynamic stability and low temperature failure strain, and can resist complicated mechanics and temperature environment of a steel bridge deck.

The invention provides a mineral wax composite shape-setting phase-change material and process for preparation, wherein the material comprises 70-80 wt% paraffin wax substance with 44-50 deg. C melting point, 4-15% of cross bond high-density polyethylene, 4-15 wt% of styrene / ethane-butylene / styrene copolymer (SEBS), and 4-6 wt% of expanded graphite.

Disclosed is a porous film comprising: (a) a porous substrate having pores; and (b) a coating layer formed on at least one region selected from the group consisting of a surface of the substrate and a part of the pores present in the substrate, wherein the coating layer comprises styrene-butadiene rubber. An electrochemical device using the porous film as a separator is also disclosed. The porous film is coated with a styrene-butadiene polymer, whose rubbery characteristics can be controlled, and thus provides improved scratch resistance and adhesion to other substrates. When the porous film is used as a separator for an electrochemical device, it is possible to improve the safety of the electrochemical device and to prevent degradation in the quality of the electrochemical device.

The present invention provides a rubber composition which has satisfactory processability and dimension stability, exhibits excellent tensile strength and wearing resistance, and the like when vulcanized and is useful as a material for an industrial product such as a rubber roll, a grinding roll, a belt, a hose and a rubber-coated fabric, a shoe part for example of a transparent shoe, a tire of a large-sized or small sized car such as a tread and a side wall and a sanitary material such as a contraceptive rubber or the like. A rubber composition of the invention comprises (1) a crosslinked rubber particle containing as repeating units (a) 39.89 to 79.89% by weight of a conjugated diene unit such as 1,3-butadiene or the like, (b) 20 to 60% by weight of an aromatic vinyl unit such as styrene, (c) 0.01 to 10% by weight of a monomer unit having at least two polymerizable unsaturated group such as divinylbenzene, and the like, and (d) 0.1 to 30% by weight of a monomer unit having one polymerizable unsaturated group and an amino group such as vinylbenzylmethylamine, and the like and (2) a conjugated diene/aromatic vinyl copolymeric rubber such as styrene-butadiene copolymeric rubber and the like.

The invention relates to a plugging material used for oil base drilling fluid and a preparation method of the plugging material. The plugging material is prepared by the raw materials consisting of a dispersing agent, acrylate, methacrylate, a pore-foaming agent and an organic monomer, wherein the organic monomer is one or two selected from styrene, stilbene, acrylonitrile and butadiene. The plugging material used for oil base drilling fluid, which is prepared according to the preparation method, is excellent in lipophilicity and low in density, has excellent suspension stability, has high strength before and after oil absorption, has certain viscosity to rocks, and can effectively plug stratum cracks so as to achieve the plugging purpose.

The invention relates to a waterproof structure and a manufacturing method thereof. The waterproof structure is used for waterproofing of detail joints on roofing and comprises a waterproof coiled material layer and a waterproof coating layer which is arranged on the position of the detail joints and is overlapped and struck with the waterproof coiled material layer, wherein the inside of the waterproof coating layer can comprise a reinforcing layer made of polyester or nylon non-woven fabrics or textile fabrics; and the material of the waterproof coating layer is exposed polyurea waterproof paint or modified waterproof paint thereof, exposed polyurethane waterproof paint or modified waterproof paint thereof, exposed polymethyl methacrylate waterproof paint or modified waterproof paint thereof or exposed polystyrene-ethylene-butadiene-styrene or modified waterproof paint thereof. Because the waterproof coating layer of the waterproof structure has large bonding force, strong capability to resist stretching and high elasticity, when the detail joints on the roofing are deformed because of gusty condition or other reasons, the waterproof coating layer is not destroyed and still has excellent waterproof effect.

A trans-1, 4-structured butadiene-isoprene copolymer rubber and a preparation method thereof. A Ziegler-Natta catalytic system containing MgCl2 loaded titanium and an organic aluminium compound is used to catalyze butadiene and isoprene for copolymerization synthesis of the butadiene-isoprene copolymer with trans 1, 4-structure greater than 90%; and the copolymer rubber comprises, by molar fraction, 20-99.5% of an isoprene unit and 0.5-80% of a butadiene unit. One preparation method of the trans copolymer rubber is by maintaining a feeding ratio of butadiene to isoprene, and catalyzing butadiene and isoprene for copolymerization synthesis of trans copolymer rubber with gradient composition at 0-90 DEG C. A second preparation method of the trans copolymer rubber is by maintaining the concentration of butadiene in reaction materials, and catalyzing butadiene and isoprene for copolymerization synthesis of trans copolymer rubber with relatively uniform composition at 0-90 DEG C. The trans copolymer rubber has characteristics of low heat, good abrasion resistance and excellent flex and fatigue resistant performance, and is suitable rubber products for dynamic usage.

The invention discloses an SBS (styrene-butadiene-styrene) modified asphalt with stable thermal storage, which has significantly improved thermal storage stability and has good high-temperature and low-temperature road performance. The SBS modified asphalt is prepared by the step of adding a styrene-butadiene-styrene block copolymer, a stabilizer, a solubilizer and polyphosphate into base asphalt, wherein the weight of the styrene-butadiene-styrene block copolymer is 2-6% of the weight of the base asphalt, the weight of the stabilizer is 0.1-0.2% of the weight of the base asphalt, the weight of the solubilizer is 1-5% of the weight of the base asphalt, and the weight of polyphosphate is 0.1-1% of the weight of the base asphalt. The preparation process of the SBS modified asphalt comprises the following steps: (1) collecting base asphalt, and heating to 175-185 DEG C; (2) adding aromatic oil, and stirring for 40-80 seconds; (3) adding styrene-butadiene-styrene block copolymer, and shearing for 8-12 minutes; (4) adding sulfur powder, and shearing for 8-12 minutes; and (5) adding polyphosphate, and developing under stirring for 100-140 minutes to obtain the SBS modified asphalt with stable thermal storage.

The invention belongs to the technical field of polymer material synthesis and preparation, relating to a star-shaped comb butadiene/styrene segmented copolymer, which is characterized in that the copolymer has the following structure: An-C, wherein A is the butadiene/styrene segmented copolymer, C is star-shaped seed tree coupler residue which is an epoxidation liquid star-shaped copolymer, n is branching degree which is larger or equal to 3, the number average molecular weight of the star-shaped comb segmented copolymer An-C is 5*10<4>-50*10<4>, the number average molecular weight of the segmented copolymer A is 1*10<4>-15*10<4>, the content of styrene is 55 percent to 85 percent (weight percent, same below), the content of butadiene is 15 percent to 45 percent, the content of 1, 2-structure is less than 30 percent (weight percent, which is counted by 100 percent of the total amount of monomer butadiene). The synthesis has the effect and benefit of simplifying the synthetic route of the star-shaped comb butadiene/styrene segmented copolymer, which can be widely applied to the preparation of the star-shaped comb butadiene/styrene segmented copolymer.

A process for dimerizing olefins in the presence of a catalyst, a hydrocarbon feedstock containing C₄ to C₆ isoolefins is subjected to dimerization. The process comprises the steps of contacting the C₄ to C₆ isoolefins at conditions conducive to dimerization with a catalytic material comprising an acidic mesoporous molecular sieve, the catalytic material being thermally stable at a temperature of at least 900° C., and carrying out the contacting step essentially in the absence of butadiene and water in the feedstock. By means of the invention, the dimerization process can be operated over extended periods of time with prolonged maintenance intervals.

The invention provides a method for preparing isobutylene by comprehensively using mixed C4 and mainly solves the problems of low overall utilization efficiency and low additional value of the mixed C4 byproduct of a refinery or a steam cracking device. An aim is fulfilled by adopting a technical scheme which comprises the following steps of: (1) selectively hydrogenating to remove butadiene in the mixed C4; (2) isomerizing butylenes-1 in the mixed C4 obtained in the first step into butylenes-2 by using catalytic distillation technology, and simultaneously dividing the mixed C4 into two strands of materials, namely the first material comprising isobutylene and iso-butane, and the second material comprising n-butane and butylenes-2; (3) separating the first material through an etherifying device to obtain high-purity isobutylene and high-concentration iso-butane; (4) dehydrogenating the iso-butane to obtain the high-purity isobutylene; and (5) isomerizing the butylenes-2 of the second material into the isobutylene by using isomerizing technology, and simultaneously separating to obtain higher-purity n-butane. The method can be applied to the industrial field of producing the high-purity isobutylene.

The invention relates to a process for preparing butadiene through the oxidative dehydrogenation of butene on an adiabatic radial fixed bed. The process comprises the step of performing oxidative dehydrogenation reaction of butene, air and water vapor in an adiabatic radial fixed bed reactor to obtain the butadiene. The radial fixed bed reactor is divided into three sections (or three stages); and process equipment sequentially comprises a first-section reactor, a first-section recuperative heat exchanger, a second-section reactor, a second-section recuperative heat exchanger, a third-section reactor, a medium-pressure steam generator, a low-pressure steam generator, a rear heat exchanger and the like. The preparation process is technically characterized in that the yield of the butadiene is high, the selectivity is high, the production device has high production capacity, the unit consumption of steam is low, and the heat energy is reasonably utilized; and the yield of wastewater, the pretreatment capacity of internal wastewater and the discharge amount of sewage can also be effectively reduced.

The invention relates to a pair of soles and particularly relates to a pair of soles of ejection foamed rubber-plastic sports shoes and a manufacturing method of the soles. The pair of soles of the ejection foamed rubber-plastic sports shoes consists of the following raw materials: an ethylene-vinyl acetate copolymer, an ethylene-octene copolymer, a hydrogenated styrene-butadiene-styrene block copolymer, an ethylene propylene diene monomer, polysiloxane resin, talcum powder, stearic acid, zinc stearate, zinc oxide, dicumyl peroxide, azobisformamide and masterbatch. The manufacturing method comprises the steps of: mixing the dicumyl peroxide and an azo foaming agent for later use, mixing other raw materials and then pouring into an internal mixer for first-stage internal mixing, then adding a mixture of the dicumyl peroxide and the azo foaming agent for second-stage internal mixing to obtain an internally mixed mixture, thinning the mixture on a roller machine, conveying the material which is evenly mixed by the roller machine into a granulator for granulation, proportioning aggregates after granulation according to set ratios, injecting the aggregates into a shoe mould by using an injection molding machine for molding, and sizing the molded soles into foamed profile products by using an incubator.

The invention discloses a high-frequency copper foil substrate with an operating frequency of more than 1GHz, which has a dielectric constant Dk of less than 3.2 and a loss factor Df of less than 0.005 as well as high glass transition temperature, high thermostability and low moisture-absorption characteristic. The high-frequency copper foil substrate contains a special composite material and is prepared by impregnating a reinforcing material with blended resin mixture. The resin mixture of the composite material is prepared by blending the following materials: (a) high molecular weight polybutadiene resin; (b) low molecular weight polybutadiene resin; (c) modified polyphenyl ether thermosetting resin; (d) inorganic powder; (e) flame retardant; (f) cross-linking agent; (g) binding aid; and (h) hardening initiator. In the invention, the drawback of low processability of pure polybutadiene with low viscosity and the drawback of need of adding plasticizer of polyphenyl ether resin (PPE) with low solubility; particularly, the non-viscous pre-impregnated sheets made by the composite material can be processed into copper foil substrates automatically.

The invention relates to a polydialkene composite rubber of trans-1,4- structure and preparation methods thereof. The composite rubber consists of 10 to 80 mass percent of trans-1,4-polyisoprene and 20 to 90 mass percent of trans-1,4-butadiene-isoprene copolymer, wherein over 90 percent of structural units of all dialkenes in the composite rubber have trans-1,4-structures. The first preparation method comprises the following steps of: homopolymerizing isoprene to obtain trans-1,4-polyisoprene by adopting a Ziegler-Natta catalysis system consisting of MgCl2 supported titanium and organic aluminum compound, and then adding butadiene to synthesize the trans-butadiene-isoprene copolymer. The second preparation method comprises the following steps of: adding mixed monomers of butadiene and isoprene into a polymerization device at the same time, performing copolymerization to obtain the butadiene-isoprene copolymer of the trans-1,4-structure, and continuously polymerizing the isoprene to obtain the trans-1,4-polyisoprene after the butadiene with high polymerization speed is completely consumed. The used polymerization device is a stirring reaction kettle or a screw extruder. The composite rubber has excellent performance such as low rolling resistance, low generated heat, abrasion resistance, particularly fatigue break increment resistance and the like, and is suitable for dynamically used rubber products such as tyres, vibration absorption materials and the like.

The invention belongs to the technical field of seed emulsion polymerization, relates to a preparation of a high polymer material, and especially relates to a small-particle-size carboxylic styrene-butadiene latex and its preparation method. Technical problems comprising unadjustable particle size, bad mechanical stability, bad chemical stability and the like of latexes in the prior art are solved in the invention. The preparation method which adopts a seed emulsion polymerization technology and adopts butadiene and styrene as monomers comprises the following steps: adding soft water, a seed latex, an electrolyte, a chelating agent and a pH buffering agent; heating; adding functional monomers, unsaturated carboxylic acid, a molecular weight adjustment agent, a composite emulsifier and an initiator; degassing when the conversion rate reaches above 98%; cooling; and synthesizing the carboxylic styrene-butadiene latex. Compared with the prior art, the preparation method of the small-particle-size carboxylic styrene-butadiene latex has the advantages of realization of the adjustment of the particle size of the latex, and simple operation; and compared with present carboxylic styrene-butadiene latexes, the carboxylic styrene-butadiene latex prepared in the invention has the advantages of narrow monodispersion, good fluidity, excellent mechanical stability and excellent chemical stability.