32 results about "Double bond" patented technology

The invention relates to an ultraviolet-curable water-based colored paint composition which comprises water-based oligomer containing at least one unsaturated double bond, a water-based medium, a photoinitiator, an optional water-based thermoplastic resin and pigments. The water-based paint composition provided by the invention can be used for obtaining a high-performance coating with abundant colors in a one-time construction mode. Compared with the traditional two-layer or three-layer application mode, the invention enhances the production efficiency, reduces the energy dissipation, lowers the preparation cost, and has the advantages of less waste generation, low content of volatile organic compounds, and low environmental pollution.

The invention discloses a use of polysiloxane with modified acrylate radicals. The polysiloxane serves as dirt-proof coating additive. The structure of the polysiloxane with modified acrylate radicals is shown as the formula I, and definitions of R1, R2, a and R3 are described as an instruction book and claims. A dirt-proof coating composition of the polysiloxane with modified acrylate radicals, oligomer containing at least one unsaturated double bond, diluent monomer and light initiator is further disclosed, and the dirt-proof coating composition has good dirt-proof performance.

The present invention concerns a process for separation of a monomer including at least one double bond, hereafter referred to as “monomer,” in particular (meth)acrylic acid, from a composition Z including this monomer and at least one impurity different to the monomer, including the steps of bringing into contact of the composition Z with an additive by forming a separation phase. The additive has a melting point of at most about 150° C. and a vapour pressure at a temperature of 20° C. of at most about 1 mbar. The monomer is then separated from the separation phase. A device for producing a monomer, the use of additives in the separation of a monomer from a monomer-comprising composition, the monomer obtainable by the process according to the invention, chemical products comprising the monomer as well as the use of the monomer in or for production of chemical products.

The present invention provides a dispersant for aqueous and non-aqueous systems which can disperse insoluble fine powders in aqueous and non-aqueous liquids in a short period of time and give long-term dispersion stability to the resulting dispersions. The dispersant is a compound of the formula

wherein CY is selected from the group consisting of aliphatic monocyclic compounds having one double bond and aliphatic polycyclic compounds with or without one double bond, or with or without bridge carbons; (n+x+y+z)>1; and R=—H, —SO₃M, —CO₂M, —PO₃M, —OCR′ wherein M=H, or Na, K, Li, Ca, Mg, NH4, NH(R₁)₂, NH₂R₁, N(R₁)₃ where R₁ is selected from the group consisting of C₁-C₆ alkyl and C₁-C₆ hydroxyalkyl; and R′=C₂-C₂₂ alkyl or alkenyl.

The invention discloses water-based alkyd-acrylate dispersion as well as a preparation method and application thereof. The water-based alkyd-acrylate dispersion is prepared from the following raw materials: alkyd resin, an acrylate monomer, texanol, an initiator and a neutralizer, wherein the alkyd resin comprises the following raw materials: rosin, vegetable oil, polyol, phthalic anhydride, maleic anhydride, trimellitic anhydride, D40 solvent oil, an alcoholysis catalyst, an esterification catalyst and texanol. The water-based alkyd-acrylate dispersion is prepared from the raw materials through a chemical copolymerization method; wherein the particle size of the nano titanium dioxide is 178-188 nm, the Mw/Mn is 2.93 to 2.96, the grafting rate is 51-57%, the particle size is small and uniform, the stability is better, the grafting rate is high and the molecular weight distribution is more uniform; a molecular chain contains conjugated double bonds, carboxyl and other functional groups,so that the crosslinking density can be improved, the water absorption rate of a paint film is reduced, and the hardness, adhesive force, salt fog resistance and other properties of the paint film are improved.

The invention relates to a formula and preparation method of high temperature stable emulsified acid. The formula of the high temperature stable emulsified acid comprises the following components in mass percent: 55.0-80.0 percent of 15-28% hydrochloric acid, 17.0-42.5 percent of diesel oil No. 0, 0.2-0.7 percent of an emulsifying agent, 0.2-0.5 percent of a co-emulsifier, 0.8-2.5 percent of a corrosion inhibitor, 0.2-0.5 percent of a corrosion inhibition synergistic agent and 1.0-2.0 percent of a ferric ion stabilizer, wherein the emulsifying agent is an ester with 12-18 carbon atoms and unsaturated double bonds or acetate of the ester; the co-emulsifier is sorbitan oleate; the corrosion inhibitor is a condensation compound of aldehyde, inorganic amines and cyclic ketones; the corrosion inhibition synergistic agent is cuprous chloride, potassium iodide, formamide or pyroantimonate; and the ferric ion stabilizer is nitrilotriacetic acid or sodium erythorbate. According to the formula disclosed by the invention, the corrosion inhibitor and the emulsifying agent have good compatibility, the preparation technology is simple, the operation is convenient, and the quality of the emulsified acid is easily controlled.

The invention belongs to the field of high-molecular compounds obtained through a carbon-carbon unsaturated bond reaction, and particularly relates to a soluble silver ion-containing polymerizable monomer, a preparation method thereof, a silver-containing polymer and an antibacterial coating. The soluble silver ion-containing polymerizable monomer can be dissolved in water or an organic solvent, and has a structure of A(AgLn)x, wherein L is a ligand capable of being complexed with silver, n is the number of ligands, A is an acid radical ion, and x is the number of acid radical negative charges; wherein at least one of A and L contains a carbon-carbon double bond. According to the soluble polymerizable monomer containing the silver ions, the polymerizable monomer containing the silver ionsis prepared in a complexing mode, and the silver ions are combined to carbon-carbon unsaturated bonds in a covalent bond or ionic bond mode. The polymerizable monomer can be dissolved in water or an organic solvent, and a silver ion-containing aqueous solution coating, a silver ion-containing organic solvent coating or a silver ion-containing emulsion coating can be conveniently obtained in a homopolymerization or copolymerization mode.

The present invention provides a viscosity index improver that is excellent in an effect of improving a viscosity index and a high-temperature high-shear viscosity of oils, etc. The viscosity index improver of the present invention includes a hydrogenated product of a copolymer containing a constitutional unit (a) derived from an aromatic vinyl compound and a constitutional unit (b) derived from a conjugated diene, a content of a constitutional unit (b1) derived from farnesene in a whole amount of the constitutional unit (b) derived from the conjugated diene being from 1 to 100% by mass, and a content of a constitutional unit (b2) derived from a conjugated diene other than farnesene in a whole amount of the constitutional unit (b) derived from the conjugated diene being from 0 to 99% by mass, and 50 mol % or more of carbon-carbon double bonds in the constitutional unit (b) derived from the conjugated diene being hydrogenated.

The invention provides a sulfonated eucommea rubber preparation method, and relates to a sulfonated rubber preparation method which includes the steps: preparing eucommea rubber emulsion and water solution of sulfonating agents A; slowly dripping the water solution of the sulfonating agents A into the eucommea rubber emulsion under protection of nitrogen, adding catalysts B, and reacting mixture at the temperature of 40-90 DEG C until the mixture is separated; separating, washing and drying products to obtain the sulfonated eucommea rubber. The sulfonate groups are introduced, and hydrophilicity, dielectric property and a shape memory function or self-repairing function of the eucommea rubber can be given. Sulfonation reaction is applicable to sulfonation modification of high-unsaturationrubber, a sulfonating agent is stable, convenient to operate and mild in reaction condition, and sulfonation reaction is stable in heating and easy to control and less in side reaction and does not easily generate gel. Glass-transition temperature with low eucommea rubber and high elasticity given by double-bond flexibleness are combined with the dielectric property and the self-repairing function, and the sulfonated eucommea rubber has potential application in the fields such as robotic soft materials, ion exchange membranes and flexible sensors.

The invention provides high-strength and high-toughness hyperbranched polymer hydrogel and a preparation method thereof. N-acryloylglycine amide (NAGA) is used as a monomer, carbon-carbon double bondson the monomer are initiated, free radical polymerization is performed to prepare the high-strength and high-toughness hyperbranched polymer hydrogel, molecules of the high-strength and high-toughness hyperbranched polymer hydrogel have carbon-carbon main chains, side chains of the high-strength and high-toughness hyperbranched polymer hydrogel are bisamide groups, and a hydrogen bond structure is formed between the bisamide groups. The hyperbranched polymer hydrogel has the beneficial effects that the hyperbranched polymer hydrogel has relatively high swelling property and excellent mechanical property, and the preparation method is simple and feasible.

The present invention provides a rubber composition for an undertread, the rubber composition achieving excellent low heat build-up and high elastic modulus when formed into a tire; and a pneumatic tire that includes the rubber composition. The rubber composition for an undertread contains a diene rubber and a carbon black. The diene rubber contains a natural rubber and a modified polymer that is obtained by reacting a nitrone compound with a double bond of a conjugated diene polymer. The content of the natural rubber in the diene rubber is 60 mass % or greater, the content of the modified polymer in the diene rubber is from 8 to 40 mass %, the content of the carbon black is from 30 to 67 parts by mass per 100 parts by mass of the diene rubber, and the nitrogen adsorption specific surface area of the carbon black is from 20 to 60 m²/g.

The invention discloses a preparation method of a nanometer modified polyurea waterproof coating, and belongs to the technical field of preparation of coatings. The preparation method comprises the following steps of mixing diethyl maleate and polyether amine D2000, mixing MDI-50 and polyether D2000, and stirring to react, so as to obtain a pre-polymer, wherein a plant extracting solution containsa plurality of conjugated double bond systems with stronger ability of providing electron pairs. The preparation method has the advantages that the nanometer zinc oxide powder is uniformly dispersedto the surface of a substrate under the polarity adsorption function of the plant extracting solution, and the energy gap width of the nanometer zinc oxide powder is 4.5eV and is equivalent to the energy of most of ultraviolet rays, so as to reduce the strength of ultraviolet rays in the radiation direction; the calcium carbonate crystals in scallop shell powder are crossly and densely stacked, the nanometer zinc oxide is promoted to be filled into the scallop shell powder, and a concentrated solution containing lecithin is continued to add, so that the interface tension of water is reduced; the wetting property of the solid/liquid system is changed, the wetting property of the polyurea waterproof coating is improved, and the application prospect is broad.

The invention provides a carboxyl-containing viscosity-reducing glue composition as well as a preparation method and application thereof. The carboxyl-containing viscosity-reducing adhesive composition comprises the following components in parts by weight: 89-96 parts of a carboxyl-containing unsaturated acrylate adhesive, 1-5 parts of a photoinitiator and 1-3 parts of a curing agent, the carboxyl-containing unsaturated acrylate adhesive comprises an acrylate adhesive containing carboxyl and a carbon-carbon double bond; the carboxyl-containing unsaturated acrylate adhesive comprises the following raw materials in parts by weight: 45-55 parts of a carboxyl-containing acrylate polymer and 4-10 parts of an unsaturated monomer containing an epoxy group; according to the carboxyl-containing viscosity-reducing glue composition, UV active monomers or low polymers do not need to be added, through cooperative use of the specific carboxyl-containing unsaturated acrylate adhesive, the photoinitiator and the curing agent, the peeling strength is high before UV illumination, and direct crosslinking curing can be achieved after UV illumination, so that the viscosity-reducing effect is achieved, and the carboxyl-containing viscosity-reducing glue composition is easy to fall off, free of residual glue and good in high temperature resistance.

The invention discloses a new method for functional modification of poly(beta-pinene) resin, and particularly relates to a new method for carrying out functional modification on poly(beta-pinene)resin through a sulfydryl-double bond addition reaction. The method includes the steps that a photoinitiator is adopted to initiate the addition reaction of double bonds on poly(beta-pinene) molecular chains and a sulfhydryl compound, polar functional groups carried by the sulfhydryl compound are introduced onto the poly(beta-pinene) molecular chains, and functionally-modified poly(beta-pinene)resin is obtained. Due to the introduction of the polar functional groups, on one hand, the compatibility of poly(beta-pinene) and common polyacrylic resin can be improved, and thus the tackifying effect of poly(beta-pinene) on polyacrylic resin can be improved; on the other hand, the traditional polymer poly(beta-pinene) can be endowed with new functions, the application field of the terpene polymer can be widened, and efficient utilization of the natural resource beta-pinene can be promoted; for example, after beta-pinene is modified with mercaptopropionic acid or mercaptoacetic acid, a product can be self-emulsified in water to form nano-particles and is expected to be applied to drug delivery systems.

The invention discloses a water-based adhesive with high conductivity. The water-based adhesive is prepared from the following raw materials: vinyl acetate resin, ethylene-vinyl acetate resin, deionized water, an organosilicone monomer containing unsaturated double bonds, polyvinyl alcohol, butyl acrylate, vinyl versatate and a silane coupling agent, wherein the weights of three components, namely the vinyl acetate resin, the ethylene-vinyl acetate resin and the deionized water account for 55 to 75 percent of total weight of the adhesive; in addition, the mass ratio of the vinyl acetate resin to the ethylene-vinyl acetate resin to the deionized water is (0.3 to 0.7) to 1 to (2 to 3); a carbon nanotube accounts for 20 to 40 percent of total weight of the adhesive; the stability of the adhesive is good; the storage period at the temperature of 5DEG C below zero to 50DEG C is greater than or equal to 12 months; the water-based adhesive has the advantages of no toxicity, no odor, no pollution, no corrosion, no combustion, coating without wire drawing and the like; bonding firmness, high-temperature stability, high mechanical strength, toughness and ultraviolet radiation resistance of a solar cell composite back plate can be improved.

The present invention relates to an immunoreaction measuring method for measuring an antigen or antibody contained as a subject substance in a sample, wherein the sample was mixed with at least one compound selected from the group consisting of dicarboxylic acids having a hydroxyl group, dicarboxylic acids having a double bond, straight-chain dicarboxylic acids expressed by the chemical formula (1): HOOC(CH₂)_nCOOH (n is an integer), and the salts of these dicarboxylic acids, and an antibody or antigen as a specifically binding substance capable of specifically binding to the subject substance, to obtain an acidic reaction solution, and then an antigen-antibody complex, generated by an antigen-antibody reaction of the subject substance with the specifically binding substance in the reaction solution was detected. This makes it possible to improve a measurement value and to relax a limitation of a measurement range due to a zone phenomenon that occurs in an antigen-excess region.

The invention relates to a method of stabilizing the bonding agent gelation time in the consolidation of a geological formation in the presence of one or more catalytically active substances, in which method a bonding agent is infiltrated into the formation, a portion of the infiltrated bonding agent is optionally expelled by flushing with a gas or a liquid, and the bonding agent remaining in the formation is cured. the bonding agent comprises a mixture of a) a heterocondensate, obtainable by hydrolysis and condensation of at least one hydrolyzable silicon compound and at least one metal, phosphorus or boron compound, the metal being selected from Al, Ge, Sn, Pb, Ti, Mg, Li, V, Nb, Ta, Zr and Hf, B) at least one organic polymerizable monomer or oligomer comprising a C-C double bond, and C) at least one thermal polymerization initiator without peroxide function.

The invention discloses a hydrophilic hollow silicon sphere as well as a preparation method and application thereof. The hydrophilic hollow silicon sphere is prepared by modifying the surface of a silicon-oxygen structured double-bond silicon sphere, which is formed by performing catalytic reaction on vinyltriethoxysilane and is used as a core, with glutathione, and etching a sphere center with hydrofluoric acid. Drug encapsulation and in-vitro simulated releasing experimental results show that compared with a hollow silicon sphere of a contrast group, the hollow silicon sphere prepared with the preparation method disclosed by the invention has a significant difference in drug loading and in-vitro releasing of camptothecin, so that the hydrophilic hollow silicon sphere prepared with the preparation method is relatively high in loading capacity and relatively good in controlled release effect. The hydrophilic hollow silicon sphere is simple in design; no reaction conditions such as high temperature and high pressure are needed; the particle size distribution of the silicon sphere is uniform; feasibility is provided for industrial production of the hydrophilic hollow silicon sphere; a new way is provided for researches on drug slow release carriers; the hydrophilic hollow silicon sphere has good social and economical benefits.

The invention discloses a partially hydrogenated styrene-b-butadiene-divinyl benzene/isoprene random copolymer as well as a preparation method and application thereof. The polymer material is obtainedby partially hydrogenating a polymer with a structural formula of Sx-b-(By-Dg/Iz), Sx is a styrene homo-polymerization block, and By-Dg/Iz is a butadiene, isoprene and divinyl benzene random copolymerization block. The polymer material has the advantages of good mechanical property, strong ageing resistance, good heat resistance, low compression deformation, long continuous tensile time, capability of being used for vulcanizing double bonds, long chain branching, wide molecular weight distribution and the like, and is particularly suitable for being used as a window sealing material used outdoors.

The invention relates to a preparation method of a heat-conducting flame retardant, with a core-shell structure, which can improve the compatibility of a polymer matrix and has flame retardant and heat-conducting properties, and application of the heat-conducting flame retardant in a battery shell. According to the invention, magnesium hydroxide and a carbon-based nano-filler are subjected to chemical grafting modification through a silane coupling agent to reduce the surface polarity, and then are sealed and coated with silicon rubber, the carbon-carbon double bond of the silicon rubber and the magnesium hydroxide with the surface grafted with graphene aminopropyltriethoxysilane undergo an addition reaction to form a core-shell structure with a Si-O-Si bond to coat the surface of the magnesium hydroxide, so that the magnesium hydroxide is changed into a super-hydrophobic state from the original hydrophilic state. In addition,the Si-O-Si bond can form a ceramic structure to wrap the surface of the material in the high-temperature combustion process to form a compact carbon layer to isolate air, thereby achieving the purpose of flame retardance. The problems of hydrophilicity of magnesium hydroxide, compatibility of a polymer matrix and agglomeration of graphene are solved.

The invention discloses a low-shrinkage dual-curing active monomer and a preparation method thereof. The monomer contains both double bonds and an oxetane structure, oxetane can participate in cationic curing, and the double bonds can participate in free radical curing, and the curing activity is relatively high; meanwhile, the oxetane structure has the volume expansion capability in a curing process, and for the monomer with the structure, a volume shrinkage effect achieved by polymerization of the double bonds of the monomer can be canceled by effectively utilizing an expansion effect achieved during ring opening of the oxetane, so that the volume of the whole monomer is prevented from being greatly shrunk after polymerization crosslinking, the coating stress is reduced, and the adhesive force is improved. The preparation method for the monomer comprises the following steps: reacting ethanol with (methyl) acryloyl chloride, performing washing with alkali liquor and a salt solution, and performing spin-drying to obtain a target product. The preparation method is simple and high in yield, and the reaction is stable and easy to control.

The invention provides a flame retardant. The flame retardant has a structure shown in a structural formula (I) or a structural formula (II) (please see the specification for the structural formula (I) or the structural formula (II)), wherein R1 and R2 are substituted or unsubstituted aryl, arylated alkyl, aliphatic groups or alcyl correspondingly and independently, R2' is R5, arylidene or alkylene, and identical or different in a repeating unit, m is an integer from 0 to 5, n is an integer equal to or greater than 1, the R2' represents a double bond or two single bonds correspondingly, and isnot the double bond simultaneously, when representing the double bond, R3 is an oxygen atom, when representing the two single bonds, R3 is R3a and R3b, wherein the R3a is hydroxyl, when the R3b represents a double bond, R4 is a nitrogen atom, when representing two single bonds, R4 is R4a and R4b, wherein the R4a is a secondary amidogen, and the R4b is connection between the R2' and the R4a in thestructural formula (I) and connection between the R2 and the R4a in the structural formula (II). After the flame retardant is mixed and polymerized with a polymer, the cured polymer is made to have flame resistance of a grade V0 under a standard UL-94.