43 results about "Dimethyl-p-toluidine" patented technology

An activator composition for the accelerated hardening of cyanoacrylate adhesives, wherein the activator comprises a member selected from the group consisting of: aromatic heterocyclic compounds having at least one N hetero atom in the ring(s) such as pyridines, quinolines and pyrimidines and substituted on the ring(s) with at least one electron-withdrawing group which decreases the base strength of the substituted compound compared to the corresponding unsubstituted compound, mixtures of any of the foregoing with each other, and/or with N,N-dimethyl-p-toluidine, and mixtures of any of the foregoing and/or N,N-dimethyl-p-toluidine with an organic compound containing the structural element, —N═C—S—S—, such as dibenzothiazyl disulfide. 6,6′dithiodinicotinic acid, 2,2′-dipyridyl disulfide, and bis(4-t-butyl-1-isopropyl-2-imidazolyl)disulfide. An activator composition may comprise a solution of one or more activators in a solvent mixture which comprises a volatile hydrocarbon and a cyclic ketone.

The utility model discloses a method for detecting blood homocysteine and a kit in the field of biological detection technologies. The kit comprises a kit body, a 96-pore plate, HCY standard substance, HCY specific convertase, a reducing agent, a buffer solution, color developing liquid A and color developing liquid B, wherein the 96-pore plate, the HCY standard substance, the HCY specific convertase, the reducing agent, the buffer solution, the color developing liquid A and the color developing liquid B are arranged in the kit body. The kit utilizes HCY in rHCYase decomposed blood to produce H2S, produced H2S is reacted with dimethyl-p-toluidine to produce methyl blue, and the HCY content in the blood is reflected through the methyl blue generating amount. The kit is simple in operation, a reagent is good in stability and high in repeatability, and the method is flexible and suitable for quick clinical HCY detection of laboratories.

The invention discloses an injectable water-absorbing and swelling bone cement, which comprises the following raw materials in percentage by weight: 0.002%-0.09% of methyl methacrylate monomers, 0.001%-0.0018% of N,N-Dimethyl-p-toluidine, 0.0015%-0.0045% of hydroquinone, 0.705%-66.6023% of methyl methacrylate-styrene copolymer, 0.12%-14.4014% of polymethyl methacrylate, 0.05%-9% of barium sulfate, 9.9%-90.1205% of water-absorbing resin fibers. The invention further provides a preparation method of the bone cement, and the preparation method specifically comprises the following step: mixing the prepared water-absorbing resin fibers with the injectable bone cement precursor to obtain injectable water-absorbing and swelling bone cement. The water-absorbing resin fibers in the injectable water-absorbing and swelling bone cement are increased in volume after absorbing water, the elastic modulus of the bone cement can be reduced, the volume contraction of PMMA bone cement in self polymerization can be offset, and the bone and prosthesis are firmly bonded.

A photopolymerization initiator comprising (A) an α-diketone compound such as camphorquinone, (B1) an aliphatic amine compound such as triethanolamine or N-methyldiethanolamine, (B2) an aromatic amine compound such as ethyl p-dimethylaminobenzoate or N,N-dimethyl p-toluidine, and (C) a triazine compound substituted with a trihalomethyl group, such as 2,4,6-tris(trichloromethyl)-s-triazine or 2-phenyl-4,6-bis(trichloromethyl)-s-triazine. The photopolymerization initiator remains stable against the environmental light such as the indoor illumination light from a fluorescent lamp or the dental light illuminating the interior of the oral cavity, is excellently handled, is quickly cured by the irradiation with an intense light emitted from a light irradiator for polymerization, provides a cured body having excellent properties, can be stably preserved even at high temperatures, and is very useful as a dental composite resin.

The invention discloses an early-strength CK anchoring agent and is characterized in that the early-strength CK anchoring agent comprises resin mortar and a curing agent, wherein the weight ratio of the resin mortar to the curing agent is 100 : 4 to 6; the resin mortar comprises the following ingredients by part by weight: 100 parts of unsaturated polyester resin, 0.5 to 1 part dimethyl-p-toluidine (DMT), 0.1 to 1 part of dimethyl aniline (DMA), 0.1 to 2 parts of gas phase silicon dioxide, 200 to 300 parts of coarse stone powder, and 200 to 400 parts of fine stone powder; and the curing agent comprises the following ingredients by part by weight: 100 parts of benzoyl peroxide, 90 to 105 parts of water, 15 to 30 parts of diethylene glycol, 1 to 3 parts of carboxymethyl cellulose, and 90 to 120 parts of white stone powder. The early-strength CK anchoring agent is applied to underground roadway supporting and pit shaft equipment installation work in a coal mine. Compared with the traditional CK anchoring agent, the early-strength CK anchoring agent mainly has the advantages that the early strength development and the curing exotherm are quick, the exotherm is large, and the final strength after curing is high.

The invention discloses modified pyrophyllite for a nylon corrugated pipe material and a preparation method thereof. The modified pyrophyllite is prepared from the following raw materials in parts by weight: 80-100 parts of pyrophyllite, 15-25 parts of tuff, 12-18 parts of ball clay, 3-6 parts of waste animal and vegetable oils and fats, 2-3 parts of bis-(gamma-triethoxysilylpropyl)tetrasulfide, 1.5-2.5 parts of cobalt neodecanoate, 10-15 parts of polyisocyanate adhesive, 3-4 parts of N,N-dimethyl-p-toluidine, 6-12 parts of 1,4-butane sultone, 3-5 parts of ethylene bisstearamide, 7-13 parts of sucroseocta-acetate, 5-10 parts of cellulose acetate butyrate, 40-60 parts of polyhydroxybutyrate, 20-30 parts of vinyl chloride-vinyl isobutyl ether copolymer resin, 16-22 parts of polyvinyl butyral, 10-15 parts of acetyl tributyl citrate, 2-3 parts of pentaerythritol tetra(3-mercaptopropionate), and 4-7 parts of an auxiliary agent. Pyrophyllite is subjected to a certain modification treatment, the surface hydrophilicity is reduced, the compatibility and the chemical affinity with a nylon material are improved, the dispersion in a nylon base material is improved, comprehensive performance of a nylon composite material is improved, and the mechanical strength and wear resistance of the nylon composite material are improved significantly.

The invention discloses novel composite bone cement with biological activity, raw materials comprise powder and liquid, the powder comprises the following parts in percentage by mass: 39%-84.3% of polymethyl methacrylate microspheres, 5%-15% of zirconium dioxide, 0.5%-3% of benzoyl peroxide, 0.2%-2% of gentamicin sulfate and 10%-41% of strontium-magnesium co-doped hydroxyapatite whiskers, The liquid comprises the following parts in percentage by mass: 98-99.6% of methyl methacrylate and 0.4-2% of N, N-dimethyl p-toluidine, mixing the powder and the liquid, stirring, standing, shaping and curing to obtain the novel composite bone cement. Bone-like apatite can be induced to be deposited on the surface of the bone cement in in-vitro simulated human body fluid, new bones can be promoted to grow on the interface of the bone cement and bone tissues in animal model rabbit bodies, good biological activity and osteogenesis promoting capacity are shown, and the compressive strength, bending strength and bending elastic modulus of the bone cement are all higher than those of conventional bone cement.

The invention discloses a methacrylic resin modified polyurethane waterproof coating for the concrete bridge deck of a railway ballast track bridge and a preparation method thereof. The waterproof coating is prepared from a component A and a component B in a mass ratio of (4 to 6) to 1; the component A is prepared from the following raw materials in parts by weight: 30 to 50 parts of hydroxy methacrylic resin, 30 to 50 parts of active methacrylic resin, 0.5 to 2 parts of N,N-dimethyl-p-toluidine, 0.5 to 2 parts of anti-settling aid, 5 to 20 parts of pigment, 10 to 20 parts of filler, 0.5 to 1 part of wetting dispersant, 0.5 to 1 part of defoaming agent, 0.1 to 0.5 part of ultraviolet light absorber and 0.1 to 0.5 part of light stabilizer; the component B is prepared from the following raw materials in parts by weight: 10 to 20 parts of hexamethylene diisocyanate trimer, 10 to 20 parts of butyl acetate and 1 to 3 parts of benzoyl peroxide. The waterproof coating film of the invention can be well adhered to a concrete base surface and cannot easily peel off and fall off, meanwhile, the waterproof coating film also has excellent mechanical properties and can replace the existing waterproof layer for the bridge deck of a ballasted track passenger special line.

The invention discloses an anchoring agent with good thermal stability for a coal mine. The anchoring agent comprises a main material, a curing agent, a filling agent and distilled water. The main material comprises the following components in parts by weight: 100 parts of terephthalic unsaturated polyesters, 1-5 parts of dimethyl-p-toluidine, 2-6 parts of dimethylaniline and 5-15 parts of fumed silica. The curing agent comprises the following components in parts by weight: 100 parts of peroxycyclohexanone, 2-6 parts of carboxymethylcellulose and 2-7 parts of diethylene glycol. The filling agent comprises the following components in parts by weight: 15-30 parts of modified asphalt, 10-30 parts of calcium phosphate bone cement, 5-15 parts of hydroxyapatite, 15-30 parts of calcined clay, 2-10 parts of organobentonite, 5-15 parts of halloysite, 10-20 parts of kieselguhr, 20-40 parts of mica powder, and 15-35 parts of talcum powder. The weight part ratio of the main material, the filling agent and the distilled water is 100: 10-18: 20-40:50-150.

The invention discloses compound bone cement. The compound bone cement consists of a solid phase and a liquid phase, wherein the solid phase comprises SIS (Small Intestinal Submucosa) particles and PMMA (Polymethyl Methacrylate) bone cement powder; in percentage by mass, the liquid phase consists of 96.0 to 99.8% of methyl methacrylate monomer, 0.6 to 1.5% of N,N-dimethyl-p-toluidine and 0.035 to 0.01% of hydroquinone, and the sum of the mass percentage of the components above is 100%; in the composition of the compound bone cement, mass of the PMMA bone cement powder is denoted as b grams, a volume of the liquid phase is denoted as V microliters, and a, b and V meet the following formulas: a ratio of a to b is greater than or equal to 0.05 and smaller than or equal to 0.4; (with reference to the specification). The compound bone cement disclosed by the invention has a suitable compression modulus when intensity of the bone cement is kept; moreover, the compound bone cement has a great pore size and adjustable mechanical performance, and is beneficial to ingrowth of cells and tissues after being applied to bone wound repair; meanwhile, bone formation conduction and bone formation inductivity of SIS can accelerate repair of a bone wound.

The invention discloses photo-curing adhesive for oral cavities and a method for preparing the photo-curing adhesive. The photo-curing adhesive for the oral cavities comprises, by weight, 67-78 parts of epoxy resin, 12-19 parts of polyisobutene, 4-15 parts of tributyl citrate, 2-13 parts of p-toluenesulfonic acid, 16-37 parts of glycerin, 1-7 parts of chitin, 4-17 parts of tridodecylamine, 3-12 parts of hydroxyethyl methacrylate, 2-9 parts of tartaric acid and 3-10 parts of N, N-dimethyl-p-toluidine. The photo-curing adhesive for the oral cavities and the method have the advantages that synergistic effects are realized by various components of the photo-curing adhesive, accordingly, the adhesion strength can be guaranteed, the photo-curing time can be effectively shortened, allergy phenomena can be prevented, and the photo-curing adhesive and the method have excellent market prospects.

The invention relates to fermorite bone cement and a preparation method. A hydrothermal and steam heating combined method is adopted for preparing fermorite having low crystalline and being capable of releasing and degrading easily but not sintered at high temperature; powder contains fermorite, calcium sulfate, polyacrylate and barium sulfate, liquid contains methyl methacrylate monomer, N,N dimethyl-p-toluidine and hydroquinone, in the bone cement powder, the size distribution range of polyacrylate is 10-150 [mu] m, the size distribution range of barium sulfate is 0.1-20 [mu] m, the size distribution range of fermorite is 2.5-53 [mu] m, and the size distribution range of calcium sulfate is 5-53 [mu] m. The particle size levels form particle size match, so that the bulk volume of the bone cement powder is reduced, the specific surface area of the powder particles is increased, therefore, the liquid wetting for the bone cement is benefited, and the bone cement realizing easy mixing, and having good injection and high mechanical strength is prepared; and the compressive strength of the prepared fermorite bone cement is 60MPa or above.

The invention provides a strontium-containing bone cement and a preparation method. The bone cement consists of two parts, namely a powder body and liquid; the powder body comprises polyacrylate which contains benzoyl peroxide, a developing agent, calcium salt and strontium ranelate; the liquid comprises methacrylate which contains hydroquinone, N,N-dimethyl-p-toluidine and strontium ranelate; by adding the strontium ranelate to the bone cement, a methacrylate polymer which contains the strontium ranelate is generated, so that heat energy release when the bone cement is polymerized is relieved, curing temperature of the bone cement is reduced, injection performance of the bone cement is enhanced, sufficient operating time is offered to doctors and operating risks are reduced; with the addition of the strontium ranelate, the mechanical performance of the bone cement is improved, so that mechanical performance matching required by human body is relieved, and the biocompatibility and bone regeneration performance of the bone cement are enhanced; and the prepared bone cement, which is higher than 50MPa in compressive strength, can meet a demand of human body bone repair; therefore, the prepared bone cement is a bone repair material which is excellent in performance.

The invention discloses a PMMA waterproof coating for concrete bridges of intercity high-speed railways and city light rails. The PMMA waterproof coating consists of a component A, a component B and acomponent C, wherein the component A is prepared from the following raw materials: methyl methacrylate pre-polymerized resin, methyl methacrylate, amyl acrylate, terpene resin, epoxy resin, polypropylene glycol dimethacrylate, propylene carbonate, a polymerization inhibitor, hollow mesoporous silica nanospheres, montmorillonite, graphene, a pigment, N, N-dimethyl-p-toluidine, N, N-diethylaniline,cobalt iso-octoate, an ultraviolet light absorber and an anti-precipitation auxiliary agent are added, the component B is prepared from the following raw materials: methyl methacrylate prepolymer resin, methyl methacrylate, amyl acrylate, a methyl acrylate and perfluoroalkylethyl acrylate diblock copolymer, polyethylene glycol dimethacrylate, layered aluminum phosphate, hydrotalcite, a multi-walled carbon nanotube, an anti-precipitation additive and a pigment, and component C comprises a curing agent.

The invention discloses a novel building roof waterproof coating which is prepared by the following raw materials by weight: 2.5-5 parts of polyurethane acrylate, 3.5-7 parts of toluene diisocyanate, 1.2-2.7 parts of ethylene glycol phenylate, 0.8-2.4 parts of iron oxide red, 1.2-3.4 parts of polyoxyethylene fatty acid amide, 2.2-3.8 parts of polyoxyethylene-polyoxypropylene block copolymer, 3.5-4 parts of 2,4-dimethyl p-toluidine, 0.8-1.6 parts of azobisisoheptonitril, and 1.2-2.3 parts of phenolic resin. The coating of the invention is rich in flexibility, can adapt to a certain degree of vibration and displacement of building structures, can form a homogeneous and waterproof sealing layer which is seamless as one body, and forms no stress point; the coating of the invention has good bonding strength, has good adhesive performance with base materials such as wood, metal materials, tiles, various stone, cement and the like, and can seal loose substrates, special-shaped parts, and prepouring joints.

A lubricant containing silicon dioxide and used for an enamelled wire is prepared from raw materials in parts by weight as follows: 50-68 parts of yellow wax, 10-16 parts of 52% chlorinated paraffin, 11-15.6 parts of N-dimethyl-p-toluidine, 11-15.6 parts of propylene glycol, 14-19 parts of silicon dioxide, 6-10 parts of camphor oil, 22-35 parts of 93# gasoline, 55-65 parts of industrial alcohol and 14-24 parts of a lubrication aid. Compared with ordinary lubricants, the lubricant has low density, good lubricity and low frictional resistance and is very suitable for lubrication of the enamelled wire; breakage of the enamelled wire cannot be caused during winding and unwinding, the straight welding performance of the enamelled wire cannot be affected with the use of the lubricant, the lubricant cannot dry in the high-temperature environment, no paraffin powder is separated out, paint of the enamelled wire cannot break, accordingly, the use performance cannot be affected, and besides, the enamelled wire has very good impact resistance.

The invention discloses an acrylate adhesive. The acrylate adhesive comprises a component A and a component B in a mass ratio of 20: 1, the component A comprises 60-85wt% of acrylate monomers, 15-40wt% of polymethyl methacrylate, 0.01-3wt% of a stabilizer and 0.01-3wt% of an accelerant, the acrylate monomers are selected from methyl methacrylate, ditetrahydrofurfuryl methacrylate, isooctyl methacrylate or lauryl methacrylate, the stabilizer is selected from p-methoxyphenol, hydroquinone, 2, 6-butylated hydroxytoluene and/or EDTA sodium salt, the accelerant is selected from N, N-dimethylaniline, N, N-diethyl aniline, N, N-dimethyl p-toluidine and/or N, N-dihydroxyethyl aniline; the component B is prepared from 80 to 99 weight percent of phthalic acid esters and 1 to 20 weight percent of benzoyl peroxide; the adhesive is suitable for large-area adhesion of acrylic products.

The invention discloses a fireproof rubber, and belongs to the technical field of tire rubber. The fireproof rubber comprises the following raw materials in parts by weight: 70-90 parts of polymethylmethacrylate powder, 25-40 parts of zirconium oxide, 10-20 parts of benzoyl peroxide, 2-3 parts of methyl methacrylate, 1-3 part of butyl methacrylate, 4-8 parts of dimethyl-p-toluidine, 5-10 parts ofa softening agent, 5-10 parts of a reinforcing agent and 2-3 parts of a fireproof agent. The reinforcing agent is acetylene black or white carbon black; and the softening agent is a silane coupling agent. The invention further discloses a preparation method of the fireproof rubber. By the unique formula of the fireproof rubber, a tire is high in thermal stability and moderate in hardness, and fireresistance and durability can meet requirements; and the preparation method of the rubber is simple and environmentally friendly, and the prepared rubber can meet use requirements, is durable, and has quite high economic benefit and practicability.

The invention discloses a bio-based antibacterial composite bonding material and a preparation method thereof. The bio-based antibacterial composite bonding material comprises a solid phase part, a solid phase part and a solid phase part, wherein the solid phase part comprises polymethyl methacrylate and polymethylacrylic acid nitro furfuryl alcohol ester; and the liquid phase part comprises methyl methacrylate and N, N-dimethyl p-toluidine. The preparation method of the bio-based antibacterial composite bonding material comprises the following steps: mixing the polymethyl methacrylate, the contrast agent and the initiator to obtain a mixture A; mixing the polymethylacrylic acid nitro furfuryl alcohol ester and the mixture A to obtain the solid phase part; mixing methyl methacrylate and N, N-dimethyl p-toluidine, and filtering and sterilizing the obtained solution to obtain the liquid phase part; and mixing the solid phase part and the liquid phase part, fully stirring, and curing. The bio-based antibacterial composite bonding material prepared by the invention is high in biological safety, excellent in antibacterial property and low in heat released by polymerization in a curing process.