117results about How to "Improve media resistance" patented technology

The invention relates to a long-opening-time primer and a preparation method thereof. The primer is matched with a single-component moisture-curing polyurethane sealant. The primer comprises the following components in percentage by mass: 15-35% of silane terminated polymer, 2-10% of bonding accelerator, 0.1-2% of stabilizing agent, 1-10% of plasticizer, 3-15% of colorant, 0.3-1.5% of dispersing agent, 0.1-2.5% of antioxidant, 0.1-2.5% of ultraviolet absorbent, 0.1-2.5% of light stabilizer and 30-70% of solvent. The primer can be used for enhancing the bonding stability of the single-component polyurethane adhesive when being used for glass assembly and elastic bonding. The system is free of isocyanate, lowers the reaction speed, prolongs the opening time of the primer, has favorable adhesion with ink glass, common primers and finish coats, and enhances the medium resistance and bonding performance of the silane terminated polymer.

The invention provides a heat-resistant solvent-free two-component polyurethane cooking adhesive. Through introducing a bisphenol A structure polyether and synthesizing appropriate polyester polyol, the temperature resistance and the medium resistance of the adhesive are improved, and the problems of low peeling strength and easiness in delaminating of a common solvent-free adhesive after cooking are solved. The heat-resistant solvent-free two-component polyurethane cooking adhesive is formed by an adhesive A and an adhesive B, wherein the adhesive A is formed by polyester polyol, liquidated-MDI and polyether polyol through an reaction; the adhesive B is formed by bisphenol A structure-contained polyether polyol, a coupling agent and castor oil; the matching ratio of the adhesive A and the adhesive B is 10 to (4 to 5).

The invention discloses a high-performance silicone-acrylate-modified water-based epoxy emulsion and a production method thereof, relating to the technical field of production of coatings used in the chemical industry field. The emulsion is prepared with a core-shell mechanism process; in a core layer, a grafted polymer consists of low molecular bisphenol A epoxy resin, epoxy group siloxane and acrylic ester; a shell body consists of hydroxyl-containing siloxane and acrylic ester; and the shell body and the core layer are subjected to interpenetration graft polymerization. In the invention, epoxy resin is modified with an organic silicon acrylic acid monomer, so that a dense crosslinked netlike structure with a special interpenetration network and excellent enclosed shielding performance is obtained. Multiple series of anti-corrosive paints can be prepared on the basis of the high-performance silicone-acrylate-modified water-based epoxy emulsion provided by the invention by taking mixed modified amine as a curing agent. The emulsion has the advantages of easy and convenient production process, saving in energy, environmental friendliness, easiness for coating construction, low sensitivity to water vapor and temperature, extremely high substrate adhesion, high corrosion resistance, high chemical stability and wide formula adjusting range.

The invention discloses a sealant of a silane-terminated polymer and a preparation method thereof. The sealant comprises the following main components by mass: 25%-55% of a silane-terminated polymer, 0.5%-10% of a catalytic silane coupling agent, 0.1%-1% of a self-polymeric silane coupling agent, 5%-40% of a plasticizer, 10%-60% of a filling material, 0.1%-2.5% of an ultraviolet absorber, 0.1%-2.5% of a hindered amine ultraviolet stabilizer, and 0.01%-0.5% of an organotin catalyst. The method specifically consists of: (1) adding high molecular weight and low-unsaturation polyether polyol, an isocyanate compound, and an organotin catalyst into a stirring tank in order at room temperature, and heating the mixture to a temperature of 40DEG C-60DEG C, then conducting heat preservation till isocyanate content in the mixture stabilized; (2) then adding an active group methyldimethoxysilane as an end capping agent, continuing preserving heat for reaction till the isocyanate content becomes 0, thus obtaining a silane-terminated polymer; (3) adding the above silane-terminated polymer, the catalytic silane coupling agent, the self-polymeric silane coupling agent, the plasticizer, the filling material, the ultraviolet absorber, and the hindered amine ultraviolet stabilizer into the stirring tank, carrying out blending for 30-45min under vacuum protection, thus obtaining the sealant of a silane-terminated polymer.

The invention discloses a modified polyurethane-acrylate water-based woodware emulsion and a preparation method thereof. The modified polyurethane-acrylate water-based woodware emulsion is mainly prepared from, by mass, 8.2-9.1 parts of isophorone diisocyanate (IPDI), 5.6-6.1 parts of polycaprolactone dihydric alcohol (PCL), 1.1-1.4 parts of dihydroxymethyl butyric acid (DMBA), 0.1-0.4 part of trimethylolpropane (TMP), 0.3-0.5 part of hydroxyethyl methacrylate (HEMA), 0.77-0.8 part of triethylamine (TEA), 8.4-9.5 parts of methyl methacrylate (MMA), 7.9-10.6 parts of acrylic monomer (BA), 0.76-1.55 parts of methylacrylate water glyceride (GMA), 1.085-2.03 parts of epoxy resin, 0.18-0.2 part of silane coupling agent, 58.84-64.38 parts of water and 0.09-0.11 part of initiator. The emulsion prepared by the method is good in performance.

The invention discloses a permeation resisting composite film. The permeation resisting composite film comprises a polyester layer, a first polyethylene layer, a polyester aluminum coated layer and a second polyethylene layer from outside to inside in sequence. The second polyethylene layer is composed of a composite layer, a middle layer and a heat sealing layer, wherein the composite layer is composed of low-density polyethylene and linear low-density polyethylene according to the weight ratio of 1:3, the middle layer is composed of low-density polyethylene, linear low-density polyethylene and high-density polyethylene according to the weight ratio of 1:1:1, and the heat sealing layer is composed of low-density polyethylene and metallocene polyethylene according to the weight ratio of 2:1. By improving the formula of the second polyethylene layer and using 2050 glue between the polyester aluminum coated layer and the second polyethylene layer, barrier property and medium resistance of the product are improved greatly while the requirement for heat sealing strength is met; meanwhile, pollution resistance is high, and the permeation resisting composite film is especially suitable for packaging oily substances such as gluten.

The invention discloses a flame-retardant sealing ring for motors of range hoods. The flame-retardant sealing ring is made from raw materials including nitrile rubber, zinc oxide, stearic acid, carbon black, white carbon black, sulphur powder, an accelerant CZ, an accelerant M, an accelerant TMTD, ETU-80, light magnesium oxide, pottery clay, chloroprene rubber adhesive, aluminum hydroxide, a silane coupling agent, zinc borate, antimonous oxide, modified flame retardant, dioctyl phthalate, carnauba wax, antiager 2246, antiager BZ and a processing agent WB-16. The flame-retardant sealing ring is good in high-temperature resistance and flame retardant performance, and meanwhile has the advantages of oil resistance, no halogen, low toxicity and environment friendliness.

The invention discloses a waterproof, corrosion-resistant and fire-retardant PU (polyurethane) coating. The PU coating comprises a component A and a component B which are mixed in the same proportion, wherein the component A comprises components as follows: diisocyanate, polypropylene carbonate diol, a small-molecular chain extender, a catalyst, a catalyst capture agent, an organic solvent, a flame retardant and a foaming agent; the component B comprises components as follows: a curing agent and a coupling agent. The invention further designs a preparation method of the waterproof, corrosion-resistant and fire-retardant PU coating. The preparation method of the coating is simple, easy to operate and low in cost, and the prepared coating is good in corrosion resistance, excellent in electrical performance, good in decoration and protection performance and good in temperature resistance.

The invention discloses a nitrile-butadiene rubber sealing material which is prepared from the following raw materials in parts by weight: 40-60 parts of nitrile-butadiene rubber N241, 20-40 parts of nitrile-butadiene rubber N240S, 1-4 parts of zinc oxide, 1-3 parts of sulfur S-80, 1-2 parts of tetramethyl-thiuram disulfide, 1-2 parts of accelerator TMTD, 0.5-0.9 part of N-cyclohexyl-2-benzothiazole sulfenamide, 20-35 parts of carbon black N-774, 20-30 parts of calcined argil, 1-2 parts of stearic acid, 1-2 parts of coumarone, 1-2 parts of microcrystalline wax OK1987, 1-3 parts of anti-aging agent RD, 1-3 parts of anti-aging agent H, 1-3 parts of anti-aging agent A and 2-6 parts of plasticizer TP-90B. The invention also discloses a preparation method of the nitrile-butadiene rubber sealing material.

The invention discloses a nitrile-butadiene rubber NBR gear cover sealing material which comprises the following raw materials in parts by weight: 60-90 parts of NBR N241, 10-40 parts of NBR N240S, 3-7 parts of zinc oxide, 1-3 parts of a stearic acid, 1-3 parts of RD, 2-4 parts of 4010 NA, 1-3 parts of 6-ethoxy-2-methyl-1,2,4-trimethyl-1,2-dihydroquinoline, 1-3 parts of microcrystalline wax, 1-3 parts of microcrystalline wax OK1987, 5-20 parts of carbon black N-774, 35-55 parts of carbon black N-990, 10-20 parts of a plasticizer TP-90-B, 0.5-1 part of sulfur S-80, 0.5-2 parts of 4',4-DTDM, 0.5-2 parts of tetramethyl thiuram disulfide, and 1-3 parts of N-cyclohexylbenzothiazole-2-sulphenamide. The invention also discloses a preparation method of the nitrile-butadiene rubber NBR gear cover sealing material.

The invention discloses a high-oil-resistance polyurethane adhesive. The high-oil-resistance polyurethane adhesive comprises a main agent and a curing agent; the main agent is a polyester type polyalcohol compound with hydroxyl blocked, wherein the polyester type polyalcohol compound is obtained by the reaction among adipic acid, isophthalic acid, phthalic anhydride, glycol, propylene glycol, diethylene glycol, toluene diisocynate and acetic ether; and the curing agent is an addition product obtained by the reaction among the toluene diisocynate, trimethylolpropane and acetic ether. According to the high-oil-resistance polyurethane adhesive, the aromatic acid is introduced, so that the prepared adhesive is higher in peeling strength and media resistance; and the dihydric alcohol compound is adopted, so that the compounded film is higher in oil resistance, and the requirement on manufacture of oil-resistance packaging bags can be completely met.

The invention belongs to the technology field of biological medical high polymer materials, and concretely relates to a process for preparing soft lining material of fluorosilicone rubber false toot. The concrete steps comprise charging modified silicone oil which is made from acrylic mixing monomer to nonmonomerd hydroxyl silicone oil, and charging silane cross linking agent, ethylene glycol dimethacrylate, and white carbon black, by which modified silicone oil with a certain degree of polymerization and cross linking is made, charging the fluorosilicone rubber on the sealing end of the hydroxyl group, by which the fluorosilicone rubber is made. The silicon sulfide rubber with the room temperature is made by the mixing and reaction of the two kinds of rubber. The invention has the advantages of reasonable preparing line, easily available raw materials, relatively low cost, simple synthetic technology and has significant values of popularizing and using.

The invention discloses an adhesive containing modified PVC (polyvinyl chloride) resin for packaging materials. The adhesive comprises an A component and a B component. The adhesive disclosed by the invention has the advantages of reasonable formula design, easily avaliable raw materials, simple production process, easiness in matching with equipment, stable product quality and strong adhesion force, and can be used for improving the physical properties, medium resistance, storage stability and the like in comparison with a traditional adhesive; by adding plant ash after treatment, the damages of water molecules to the adhesive are effectively reduced, the water resistance of the adhesive is greatly improved, and the adhesive has great quick-drying property because the hydrophilicity of the adhesive is reduced; and by adding the modified PVC resin, the viscosity of the adhesive is increased, the flowability of colloid is improved and the adhesion performance of a product is further enhanced.

The invention belongs to the technical field of film printing materials, and discloses a normal-temperature self-crosslinking type core-shell structure acrylate emulsion as well as preparation and application thereof. The preparation method comprises the steps: carrying out dehydrogenation condensation reaction on a vinyl polyether monomer and a hydrogen-containing silane coupling agent to obtain a modified macromonomer; heating a core-layer monomer emulsion composed of styrene, methacrylate and acrylate to 55-85 DEG C, and then adding an initiator solution to carry out polymerization reaction to obtain a core-layer emulsion; and dropwise adding a shell monomer emulsion composed of methacrylate, acrylic acid and a modified macromonomer and an initiator solution, and continuously carrying out a polymerization reaction to obtain the normal-temperature self-crosslinking type core-shell structure acrylate emulsion. According to the invention, the modified macromonomer with the specific structure is used as a shell polymerization monomer, so that the product can be endowed with a normal-temperature cross-linking characteristic, the adhesive force is enhanced, the wettability is improved, and the water resistance is good. The emulsioncan be used for preparing water-based ink and water-based latex paint.

The invention discloses a fluororubber/ N,N'-m-phenylene bismaleimide composite. The N,N'-m-phenylene bismaleimide composite comprises the following components mainly including, by weight, 100 parts of fluororubber capable of being cross-linked through peroxides, 5-30 parts of N,N'-m-phenylene bismaleimide, 3-5 parts of metallic oxide and 1-3 parts of oxganic peroxides. In the composite material, chemical connection is established between a dispersion phase of N,N'-m-phenylene bismaleimide resin and fluorine rubber molecules serving as matrix, so that the composite material is enabled to be endowed with better high-temperature resistance and medium resistance.

The invention discloses a material of a ring-pull can body. The material comprises an aluminum alloy board and a protection coating coated on the surface of the aluminum alloy board. The aluminum alloy board is made of the material prepared from chemical components including, by weight, 1.0-1.5% of Mg, 0.8-1.2% of Mn, 0.20-0.30% of Cu, 0.25-0.60% of Fe, 0.20-0.40% of Si, 0.01-0.03% of Ni, 0.03-0.05% of Zn, 0.01-0.03% of Re, and the balance Al and inevitable impurities. The aluminum alloy board is obtained by conducting homogenization, hot rough rolling and hot finish rolling on an aluminum alloy cast ingot. The protection coating is formed by smearing epoxy resin paint onto the surface of the aluminum alloy board uniformly. The thickness of the coating is 3-5 micrometers.

The invention discloses high-performance strong glue. The high-performance strong glue is prepared from the following components: modified cassava starch, polyvinyl alcohol, vinyl acetate, nano-diatomite, a yam and wolfberry mixed extracting solution, lauryl methacrylate, sodium lignosulfonate, butyl acrylate, propolis and lanolin. The high-performance strong glue is environment-friendly and has excellent comprehensive performance; the high-performance strong glue can generate very low stress to a contact object during cold-hot impact cycle at -12 to 180 DEG C after being cured, and can still resist destructive power above 60N after being subjected to 200 cold-hot impact cycles at -12 to 180 DEG C; and water resistance and heat resistance are excellent, fast bonding is realized, the falling is avoided, and the cementing strength is high.

The invention relates to a rubber-polytetrafluoroethylene compounded sealing ring which comprises a ring-shaped body, wherein the ring-shaped body is a silicon rubber ring-shaped body or a fluororubber ring-shaped body. The sealing ring is characterized in that a polytetrafluoroethylene felt pad is wrapped outside the ring-shaped body. The compounded sealing ring can be used for comprehensively improving the mechanical property and the chemical stability of a rubber sealing ring as well as the wear resistance and the medium corrosion resistance of a compounded sealing ring, enhancing the corrosion resistance, the adhesion resistance and the sealing rebound resilience of rubber, increasing the oil resistivity on the surface of the rubber, obviously improving the high-temperature and low-temperature resistance of the surface of the rubber, obviously reducing the friction consumption, keeping the physical mechanical property of the rubber unchanged and also improving the strength and the hardness of the rubber. In addition, the invention also ensures that the using range of the rubber sealing ring is further expanded, and moreover, the service life of the rubber sealing ring coated with the polytetrafluoroethylene felt pad is obviously prolonged by 5-6 times. The rubber-polytetrafluoroethylene compounded sealing ring is suitable for equipment of pipeline systems in the chemical industry, and the like.

A pressure sensor system having a pressure sensor chip is specified. The pressure sensor chip is mounted on a mounting receptacle of a ceramic housing body having a pressure feed guided to the pressure sensor chip. The housing body is three-dimensionally shaped and monolithically formed and is formed by a ceramic material having a coefficient of thermal expansion which deviates by less than 30% from the coefficient of thermal expansion of the pressure sensor chip in a temperature range of greater than or equal to −40° C. and less than or equal to 150° C.