38results about How to "Low mixing viscosity" patented technology

The invention relates to a low-viscosity and high-heat conduction epoxy resin electronic potting adhesive which is formed by mixing a component A with an amine curing agent according to the weight ratio of 100:5-12, wherein the component A comprises the following raw materials in weight ratio: 70-85 parts of spherical alumina powder, 10-20 parts of epoxy resin, 2-4 parts of active thinner, 2.5-5 parts of toughening agent and 0.1-0.5 parts of coupling agent. The invention has the advantages that the spherical alumina of the potting adhesive has higher filling amount compared with non-spherical alumina, the viscosity is less affected, the fluidity is favorable and the construction is convenient; the potting adhesive has good dispersibility and is difficult to sedimentate; a condensate has high heat conductivity and can quickly dissipate accumulated heat of heating parts and components; a high-filling filler can reduce a thermal expansion coefficient and a volumetric shrinkage rate and is very suitable for potting parts and components; and the price is cheaper compared with boron nitride and aluminum nitride, and the cost is low.

The invention discloses an epoxy resin pouring sealant. The epoxy resin pouring sealant comprises modified epoxy resin and a modified anhydride curing agent according to a mass ratio of 100:(48-71); the modified epoxy resin is prepared from, by mass, 90-95 parts of epoxy resin, 5-10 parts of an epoxy diluent, 1.5 parts of a coupling agent, 0.03 part of a defoaming agent, 0.5 part of a dispersing agent and 315-355 parts of a heat-conducting filler; and the modified anhydride curing agent is prepared from, by mass, 100 parts of anhydride, 1-3 parts of a curing accelerator and 290-330 parts of afiller. The invention further provides a preparation method of the epoxy resin pouring sealant, and also provides a novel electric driven motor prepared from the epoxy resin pouring sealant. The heatresistance and heat conductivity of the epoxy resin pouring sealant are improved.

The invention relates to a wind turbine blade and in particular relates to an epoxy resin composition for the wind turbine blade. The vacuum flow guide epoxy resin composition for the wind turbine blade comprises a component A and a component B, wherein the component A comprises 45-65wt% of bisphenol-A epoxy resin 128, 5-15wt% of bisphenol-F epoxy resin 170, 15-25wt% of low-viscosity bisphenol-A epoxy resin 332 and 10-20wt% of epoxy diluent BDGE; the component B comprises 50-70wt% of polyether amine curing agent D230 and 30-50wt% of isophorone diamine (IPDA). The composition is obtained after mixing the component A with the component B according to a proportion of parts by weight, namely 100 to (29-31). The composition has the effects of reducing the viscosity of epoxy resin and improving the processability of epoxy resin on the premise of ensuring various physical and chemical properties of cured resin, especially the mechanical properties.

The invention discloses bis-secondary amine containing siloxane groups and a preparation method and application of the bis-secondary amine. The bis-secondary amine containing the siloxane groups is obtained by Michael addition reaction of one or more bis-primary amines and siloxane containing unsaturated double bonds. A B component of spray polyurea is prepared by mixing the bis-secondary amine and an auxiliary agent, an isocyanate prepolymer generated by reaction of polyether polyol and isocyanate is taken as a component A, and the component A and the component B are mixed and sprayed according to the volume ratio of the components A and B of 1 : 1 to obtain a polyurea material. Two active hydrogens of the bis-secondary amine can react with the isocyanate to generate linear polyurea, andthe siloxane groups can be hydrolyzed to generate Si-O-Si cross-linking points, so that the cross-linking speed of the amine and the isocyanate is reduced and the mechanical properties of the polyureamaterial are improved.

The invention relates to a casting epoxy resin composition for part repair, aims at achieving the technical purpose that the requirements of rapid curing at room temperature and excellent properties can be met simultaneously, and belongs to technical field of high-molecular polymers. The composition is characterized in that a preparation method of the composition comprises the steps that 1, preheated bisphenol A type epoxy resin, toughening type epoxy resin and a diluent are added into a reaction kettle in sequence, the temperature inside a stirring tank is maintained to be 50-70 DEG C, a defoamer is added, stirring and defoaming are conducted simultaneously, and a resin mixture is obtained; 2, aliphatic amine is added into another reaction kettle, stirring is started, the temperature inside a tank is maintained to be about 25-40 DEG C, alicyclic amine and an amine type accelerator are added in sequence, mixing and stirring are conducted continuously for 15-30 min, and a curing agent mixture is obtained; 3, the resin mixture and the curing agent mixture are mixed to be uniform according to the ratio of 100:(15-17), and the epoxy resin composition for part repair is obtained. The comprehensive performance of the product is excellent, and the composition has low viscosity and rapid curing speed and can meet curing requirements in different temperature environments.

The invention discloses a sealing method for a direct-insert type light-emitting diode (LED) lamp. The sealing method comprises the following steps: firstly, setting the heights of a mold strip and a sticking point, and selecting a diffusant and a coloring agent; secondly, heating epoxy resin A, mixing the epoxy resin with epoxy resin B at a certain ratio, adding the diffusant and the coloring agent, stirring the diffusant and the coloring agent, and carrying out vacuum-pumping treatment on stirred mixed glue; thirdly, fixing the bound LED bracket on a loading rack; fourthly, adjusting the glue-pouring quantity, the glue-extruding speed, the sticking time and the sticking distance; and finally starting a pouring machine and carrying out sealing treatment on the bound LED bracket. The epoxy resin A is heated and then is mixed with the epoxy resin B at the certain ratio, so that the mixing viscosity is reduced; the diffusant and the coloring agent are added and stirred, so that the problem of yellow discoloration of the baked LED lamp is avoided by controlling the mixing ratio and the mixing time; and the quality and the yield of the LED lamp are improved, so as to improve the cost performance of an LED display screen.

The invention relates to an ultralow-hardness polyurethane pouring sealant and a preparation method and application thereof. The polyurethane pouring sealant is composed of a component A and a component B, wherein the component A is prepared from, by weight, 90-100 parts of Polypolyol, 0.1-1 part of compound type anti-yellowing agent, 0.1-2 parts of catalyst, 0.1-1 part of defoaming agent, 0.1-5 parts of coupling agent and 0-10 parts of plasticizer, the component B is prepared from, by weight, 30-40 parts of polyisocyanate and 60-70 parts of plasticizer. The pouring sealant can be suitable for automatic pouring of handwork, is short in curing time at room temperature, and has the advantages of being transparent, few in bubble, high in insulativity, high in adhesion to metal and the like after being cured.

The invention relates to wind driven generator blades, vessels, yachts, automobile bodies and the like, in particular to vacuum infusion epoxy resin used for carbon fiber and applied to the production and manufacture process. The vacuum infusion epoxy resin comprises a resin component and a curing agent component, wherein the resin component comprises 50%-70% of a bisphenol A epoxy resin 127, 15%-30% of a bisphenol F epoxy resin 170 and 5%-15% of an epoxy diluent BDGE; the curing agent component comprises 40%-70% of a polyether amine curing agent D230, 20%-30% of diaminocyclohexane DCH 99 and 10%-20% of 2-methyl-diaminopentane Dytek A; and the resin component and the curing agent component are mixed in the proportion of 100:30 to form composition. The vacuum infusion epoxy resin for carbon fiber has low blending viscosity, the infiltration of carbon fiber is good, the operation pot life is flexible, appropriate adjustment can be performed according to different curing agents, the quality of blade and automobile body products is improved greatly, and the production efficiency can be increased.

The invention relates to perfusion polyurethane resin for a wind power blade and a preparation method thereof, and belongs to the field of composite materials of a wind power technology. The pouring polyurethane resin for the wind power blade comprises a component A and a component B which are respectively packaged and mixed during use; the component A comprises polymerized isocyanate, an isocyanate monomer and an initiator; the component B comprises polyether polyol with the functionality of 2, polyether polyol with the functionality of 3, a water removal agent, an active diluent, a defoaming agent, a polyurethane delay catalyst and an accelerant. The perfusion polyurethane resin is a two-component polyurethane system, the mixed polyurethane system has the advantages of low mixing viscosity, long gelation time, high mechanical strength and low moisture sensitivity, and a composite material product prepared from the polyurethane has the advantages of no bubble and excellent FRP (Fiber Reinforced Plastic) performance, and completely meets the requirements of wind turbine blade manufacturing. The preparation method is simple, the raw material cost is low, no bubble, whitening and other defects are generated in the filling process, and the perfusion polyurethane resin can be widely applied to preparation of various large-scale wind power blade composite materials.

The invention relates to a transparent silica gel for liquid crystal display fitting. A raw material formula comprises 35-55 parts of component A, 10-25 parts of component B, 2-15 parts of component C, 5 parts of bonding accelerant, 5-25 parts of component E, 0.1-5 parts of catalyst and 0.1-1.0 part of inhibitor; the component A is vinyl-terminated polysiloxane conforming to general formula (1); the component B is allyloxy-terminated polypropylene oxide conforming to general formula (2); the component C is vinyl MQ silicon resin; ratio of M to Q is at 0.8-1.5; the component E is hydrogen-endedpolysiloxane conforming to general formula (3). The transparent silica gel for liquid crystal display fitting prepared according to the invention has the advantages of low viscosity, short defoamingtime, quick curing molding and moderate hardness.

The invention discloses a transparent dealcoholized organosilicon sealant with low viscosity and high strength, which is characterized by comprising the following components in parts by weight: 100 parts of alkoxy-terminated polydimethylsiloxane; 5 to 50 parts of methoxy modified silicon resin; 5-50 parts of methyl MQ silicone resin; 3-10 parts of a cross-linking agent; 0.5-3 parts of a coupling agent; 0.5-3 parts of a compound catalyst; the invention also discloses a production method of the transparent dealcoholized organosilicon sealant with low viscosity and high strength. The low-viscosity and high-strength transparent dealcoholized organosilicon sealant has the advantages of high mechanical strength and low viscosity, and can be widely applied to the fields of electronic appliances, high-end medical equipment, automobile industry and the like; the production method disclosed by the invention is simple to operate, good in reproducibility and small in dust.

The invention belongs to the technical field of fireproof coatings, and discloses a novel rail vehicle fireproof coating which is a double-component coating and is formed by mixing a resin A componentand a curing agent B component, wherein the resin A component comprises 25-50 parts of acrylic acid modified epoxy resin, 15-35 parts of a flame retardant, 2-15 parts of a reinforcing agent and 0.1-2parts of a thickening aid; the curing agent B component comprises 5-20 parts of a modified amine curing agent, 2-15 parts of a foaming agent, 0-2 parts of glass fibers, 0-2 parts of carbon fibers and0-2 parts of ceramic fibers; in conclusion, the double-component fireproof coating disclosed by the invention has the advantages that the solid content is 100%, and any solvent and curing acceleratorare not required to be added, so that the double-component fireproof coating has good environmental protection property; meanwhile, the coating is low in mixing viscosity and has the advantage of being easy to construct; besides, the curing agent in the coating adopts a modified amine curing agent, so that the curing agent does not contain volatile micromolecular amine and tertiary amine catalysts, and the problem of strong odor of the curing agent is effectively avoided.

The invention provides low-viscosity flame-retardant casting glue and a preparation method thereof. The casting glue mainly comprises an A agent and a B agent. The A agent can improve flame retardance of a product through aluminium hydroxide and decabromodiphenylethane, which have a synergic effect on improving flame retardance of the product. Moreover, decabromodiphenylethane can further improve thermal stability and ultraviolet resistance of the product on the basis of aluminium hydroxide. The A agent has low leachability during storage. Through application of low-viscosity base glue, the entire viscosity of the A agent is greatly reduced. Through cooperation of the A agent with B agent during a using process, it is ensured that the product has better leveling property and low mixing viscosity, which is beneficial for bubble discharge and smooth appearance during stirring, mixing and use. Through cooperation of the components, the flame-retardant casting glue has excellent comprehensive performance. The preparation method is simple and easy to realize, and is suitable for industrial production.