124 results about "Cyanoacrylates" patented technology

A cyanoacrylate composition comprising (i) at least one lower cyanoacrylate monomer component selected from ethyl cyanoacrylate or methoxy ethylcyanoacrylate; (ii) at least one higher cyanoacrylate monomer component than in an amount greater than 12% by weight based on the total weight of the combination of the lower cyanoacrylate monomer and the higher cyanoacrylate monomer and (iii) a plasticizer. The higher cyanoacrylate monomer and the plasticizer are chosen from certain ones. The compositions cure to give flexible polymeric materials which are desirably also transparent.

The present invention relates to cured compositions useful as adhesives and sealants formed by dispersing an amine-terminated polyamide curative into a base to form a composite and activating the composite forming the cured composition. Bases described include epoxies, polysulfides and cyanoacrylates. Curing mechanisms include heat and pressure activation. The amine-terminated polyamide curative has a ratio of equivalents of amine to acid groups of from about 1.05:1.00 equivalents NHX:COOH to no greater than about 1.95:1.00 when x is 1 or 2.

A novel ORC adhesive tape is disclosed. Specifically, the ORC adhesive tape is useful as an alternative to conventional mechanical and non-mechanical wound closure means. The ORC tape has a tape substrate made from neutralized ORC and it contains an adhesive composition such as a bioabsorbable alpha-cyanoacrylate.

This invention discloses a medicine of anti-tumor and anti-plant virus effect---- cyanoacrylate category derivative and its preparing method and biological activity. The following general formula denotes the compound and its preparing method. The definition of R1, R2, R3 in the formula is in instruction book. Materials are carbon bisulfide, cyan acetic ester, dimethyl sulfate, aromatic amine, and sodium cyanide is catalyst, cyanoacrylate category derivative is synthesized by three steps. There is proliferation inhibitory effect of compound b, k to PC3 prostate cancer cell gene stock, and proliferation inhibitory effect of compound i, j to NIN3T3 cell ERK albumen phosphorylation, and good anti-cancer activity is revealed. There is inhibitory activity of compound b, n to tobacco mosaic, and certain anti-plant virus activity is revealed.

Systems and methods for the treatment of perforator veins for venous insufficiency are described. The systems can include a catheter assembly comprising a proximal hub, a spin lock on the proximal hub, a elongate body overmolded to the proximal hub, and a distal end, the catheter, the elongate body configured to be placed within a perforator vein; an extension tubing having a proximal female hub, a distal male hub, and an elongate body therebetween, the distal male hub having a spin lock thereon, the distal male hub configured to be attached to the proximal hub of the catheter assembly; a syringe filled with a volume of media including cyanoacrylate; and an injector configured to automatically dispense a bolus of the media sufficient to coapt the perforator vein from the syringe upon actuation of a control on the injector. Methods are also disclosed.

A fast-curing instant glue is characterized by including the following components by the mass percentage: 86-95% of alpha-cyanoacrylate, 0.5-2% of alpha-cyanoacrylic acid, 3-8% of butadiene-acrylonitrile rubber, 0.01-3% of a stabilizer, 0.5-3% of a promoting liquid, and 0.05-1% of a catalyst. A preparation method comprises the steps: adding alpha-cyanoacrylate and alpha-cyanoacrylic acid in a reaction kettle, and heating up to 60-95 DEG C while stirring; adding the organic solvent and the catalyst with the preset ratio; adding the butadiene-acrylonitrile rubber, and evenly stirring the mixed solution with the stirring time of 60-120 minutes; heating up and distilling off the organic solvent; under secondary Roots, distilling off a modified alpha-cyanoacrylate product; and finally adding a proper amount of the stabilizer and the promoting liquid under nitrogen protection. By modification of alpha-cyanoacrylate, and in cooperation with the promoting liquid adhesive technology, the original poor thermal stability and an albefaction phenomenon are improved; the aspects such as water resistance, thermal resistance and flexibility are greatly improved, and thus the effect of impact strength is improved; and the fast-curing instant glue is good in adhesive effect, small in smell and good in environmental protection.

The invention provides an epoxy resin adhesive for bonding fluororubber and metal. The adhesive comprises component A and component B. The component A comprises the following materials by weight: 30-40 parts of epoxy resin, 5-6 parts of rosin-modified resin, 2-3 parts of chlorosulfonated polyethylene, 5-10 parts of natural rubber powder, 2-4 parts of chlorinated paraffin, 2-4 parts of ferric oxide micropowder, 2-4 parts of magnesia, 3-6 parts of carbon black, 2-3 parts of a silane coupling agent, 1-2 parts of dodecyl phosphate, 1-2 parts of silica sol, 1-2 parts of alumina sol, 1-3 parts of acrylate, 1-2 parts of titanium dioxide, 3-6 parts of polymethyl methacrylate, 3-6 parts of alpha-cyanoacrylate, 2-4 parts of tricresyl phosphate, 5-10 parts of polyethylene glycol, 3-4 parts of poly(lactic acid-co-glycolic acid), and 40-60 parts of organic solvent. The component B comprises the following materials by weight: 15-20 parts of a curing agent, and 20-30 parts of dimethyl formamide.

An apparatus and method for developing latent fingerprints having a heat source with a removably mounted chamber and sublimation system wherein the sublimation system is in communication with a heat emitting end of the heat source and an internal space of the chamber. Upon activating the heat source, heat transforms a cyanoacrylate of the sublimation system into vapor within the internal space of the chamber. The vapor contacts an object contained within the chamber to reveal any latent fingerprints on the object.

A flexible abrasive finishing article including a backing of fabric or paper having first and second major surfaces with abrasive particles adhesively secured to said first major surface and a layer of cyanoacrylate based material substantially covering the second major surface. The method of making a flexible abrasive finishing material including the steps of applying a layer of cyanoacrylate based material to a surface of a backing material opposite the surface to which abrasive particles are adhesively secured and covering said cyanoacrylate material.

The present invention relates generally to an article comprising a curable film on a release substrate and/or carrier substrate. More particularly, the curable film comprises at least one specific cyanoacrylate monomer and at least one film forming (co)polymer. The article may take the form of a label, a single-sided tape, a transfer tape or a double-sided tape.

This invention relates to one nuclear power station with low smoke without chimney cable insulation protection materials, which uses ethene-vinyl acetate polymer or silicon resin as base resin interfacing polyolefin, wherein, it uses aluminum hydroxide, magnesium hydrate, earth silicon or silicon resin as combustion inhibitor with aid of antiager, photographic sensitizer and process aid agent; the sensitizer is for cyanoacrylate, 1,1,1-trimethylolpropane methyl methacrylate, organic silicon resin, phenylene silica gel or formaldehyde-phenol resin; The aid process agent is for aliphatic acid salt and organic silicon.

The invention relates to a preparation method of halohydrocarbon-free alpha-cyanoacrylate, which comprises the following steps: mixing cyanoacetate and methyl carbonate in a reaction kettle, simultaneously mixing formaldehyde and a base catalyst in a charging hopper, then adding the mixture of the formaldehyde and the base catalyst to the reaction kettle at twice, performing a refluxing and condensation reaction at 78 DEG C under normal pressure, adding a dehydration solvent methyl carbonate to dehydrolyze after the condensation reaction is finished, adding an anionic polymerization inhibitor phosphorus pentoxide and a free radical polymerization inhibitor, and depolymerizing and distilling at 155-210 DEG C at a vacuum degree of 0.5-30 mmHg to obtain an alpha-cyanoacrylate coarse monomer; and rectifying the coarse monomer to obtain a high-purity alpha-cyanoacrylate refined monomer, wherein the yield of the alpha-cyanoacrylate refined monomer is more than 75%, and the purity of the alpha-cyanoacrylate refined monomer is 99%. The invention has the advantages of no pollution, energy conservation and high yield and high purity of the obtained product, and is stable in reaction, thereby being suitable for popularization and application.

The invention discloses an indolo[3,2,1-jk]carbazole derivative, a preparation method and an application. The derivative takes the indolo[3,2,1-jk]carbazole with coplane rigid structure and good heat stability as an electron donor, quinary arylheterocyclo group or hexahydric arylheterocyclo group or quinary arylheterocyclo group and hexahydric arylheterocyclo group can be introduced for taking as pi conjugate bridge unit, cyanoacrylate is taken as an electron acceptor to obtain a series of electron push-draw type indolo[3,2,1-jk]carbazole derivative, the derivative has photoelectrochemistry performance, can prepare a photosensitizer of a dye sensitization solar energy cell, the derivative enables easy preparation and simple purification, the cost of the derivative is lower than that of the trisruthenium, and the preparation cost of the dye sensitization solar energy cell can be effectively reduced.

This invention relates to novel iminium onium salts, which may be in the form of ionic liquids, and a process for producing electron deficient olefins, such as 2-cyanoacrylates, using such an iminium onium salt, for instance in the form of an ionic liquid.

The invention discloses a PE thin film packaging material and a preparation method thereof, and belongs to the technical field of thin film material preparation. The PE thin film packaging material isprepared from the following raw materials: PE resin, nano-SiO2, sodium dodecylbenzenesulfonate, alpha-cyanoacrylate, aluminum isopropoxide, potassium trimethylsilanolate, polyethylene oxide, zinc stearate, glycerol, montmorillonite, oleic acid, polyethylenimine. The PE thin film packaging material is prepared by the steps such as grinding, high temperature reaction, mixing, granulation, rolling and the like. With a process of the invention, the tensile strength, elongation at break, and tear strength of the PE thin film packaging material can be improved.

A compound represented by the following general formula (1). In the formula, A represents a benzene ring, a naphthalene ring and the like, wherein these rings may be substituted with a halogen atom and the like, R¹ represents a hydrogen atom and the like, R² represents a C_1-35 hydrocarbon group having or not having at least one group selected from an epoxy group, 4-vinylphenyl group and a (meth)acryloyloxy group, or a hydrogen atom, wherein at least one of R² with n occurrences is a C_3-35 hydrocarbon group having at least one group selected from an epoxy group, a 4-vinylphenyl group and a (meth)acryloyloxy group, n represents an integer of 1 to 6, and X represents a nitrogen atom, an oxygen atom, a sulfur atom, a phosphorus atom, or an n-valent organic

group having 35 or less carbon atoms.

Stabilized photoactive composition comprising: - at least one photoactive organic polymer; - at least one light stabilizer selected from hindered amines; - at least one UV absorber selected from triazines, benzoxazinones, benzotriazoles, benzophenones, benzoates, formamidines, cinnamates or propenoates, aromatic propanediones, benzoimidazoles, cycloaliphatic ketones, formanilides including oxamides, cyanoacrylates, benzopyranones, salicylates, or mixtures thereof. Said photoactive composition can be advantageously used in the construction of photovoltaic devices such as, for example, photovoltaic cells, photovoltaic modules, solar cells, solar modules, on both rigid and flexible supports.

The invention relates to an adhesive composition. The adhesive composition comprises at least one single-alpha-cyanoacrylate (a), at least one dual-alpha-cyanoacrylate glycol or dual-alpha- cyanoacrylate diamide (b) and at least one additive (c). The adhesive composition can be rapidly cured, does not contain organic solvents and can be used for food packaging, lunch boxes, bioengineering materials and medical adhesives; and curing products can be degraded and is non-toxic.

The invention relates to an instant-drying solvent-free adhesive for PVC (polyvinyl chloride) pipeline bonding, which is prepared from the following components in percentage by weight: 70-96% of cyanoacrylate, 1-20% of chlorinated polyvinyl chloride resin, 0.5-10% of vinyl-terminated nitrile-butadiene rubber, 0.1-10% of plasticizer, 0.1-5% of thixotropic agent, 0.01-5% of anionic polymerization inhibitor and 0.01-5% of free radical polymerization inhibitor. The adhesive has the advantages of simple preparation technique, favorable damp-heat resistance, favorable aging resistance, favorable toughness, favorable migration resistance, high bonding strength for PVC and the like. The adhesive is environment-friendly and free of solvents, and thus, does not have solvent discharge; and the adhesive has favorable environment friendliness, and conforms to the human environment-friendly health requirements. The performance testing proves that the adhesive satisfies the requirements in national related industry technical standard.

The invention relates to a quaternization N-ethyl chitosan, which is a novel chitosan ramification with a good water-solubility, bacteriostasis, moisture absorption, moist storage and emulsification stability. The preparation process is characterized in that: under the pH of 3.0 to 12.0, the chitosan of the deacetylation of 30 percent to 90 percent is reacted with pyruvic acid and malonaldehydic acid to generate a chitosan Schiff base, and is deoxidized by sodium borohydride, potassium borohydride, sodium borohydride cyanoacrylate, cyano-group sodium borohydride and the mixture to obtain the N-ethyl chitosan; the N-ethyl chitosan in alcohol medium is processed by alkali, and is modified by glycidyl trimethyl ammonium chloride or 3-chlorine -2-hydroxy trimethyl ammonium chloride so as to get N-ethyl chitosan admixture with quaternization; the admixture is washed and dissolved by methyl alcohol or ethanol solution, then dialysis desalination, concentration in decompression or atmospheric pressure, absolute ethyl alcohol, or acet sedimentation and dehydration are conducted, finally the admixture is arranged in a vacuum airer at 60 DEG C to 150 DEG C for drying for vacuum freeze drying until the water volume is less than 10 percent.

The invention discloses an insulating layer material for a high-voltage electrical cabinet. The material is prepared from the following raw materials in parts by weight: 8-24 parts of vinyl silicone rubber, 3-12 parts of chlorinated polyethylene rubber, 4-6 parts of ABS resin, 2-14 parts of decabromodiphenyl ethane, 5-15 parts of epoxy resin, 5-13 parts of stearic acid, 3-5 parts of cyanoacrylate, 2-4 parts of polyacrylate glue powder, 5-20 parts of a filler, 2-5 parts of a plasticizer, 1-6 parts of flame retardants and 0.5-1.5 parts of a stabilizer. A preparation method disclosed by the invention is simple and feasible, and the prepared insulating layer material can prevent the potential safety hazard that the insulating layer materials such as cables and electric wires are flammable in a high voltage environment. As flame retardants such as magnesium oxide, aluminum oxide and antimonous oxide are added into the raw materials, the insulating layer material has relatively high flame retardance and has the advantages of no toxicity, low smoke and the like.