43results about How to "Has a toughening effect" patented technology

The present invention provides a preparation method of an epoxy resin system for prepregs. The preparation method comprises: stirring an epoxy resin matrix at a temperature of 50-100 DEG C to form a component A; mixing a room temperature reactive curing agent and a latent curing agent to form a component B; and carrying out a mixing reaction on the component A and the component B according to a mass ratio of 100:10-20 to obtain the epoxy resin system for prepregs. The present invention further provides a prepreg preparation method. According to the present invention, when the epoxy resin system is used for preparing the glue forming film, the viscosity of the epoxy resin system is low so as to ensure the infiltration enhancement of the fibers or each fiber of the fabric, and due to the addition of the room temperature reactive curing agent having the flexible segment, the epoxy resin system can continuously react during the subsequent placing so as to improve the viscosity of the epoxy resin system and reduce the resin fluidity of the prepreg, wherein the flexible segment can toughen the composite material.

The invention relates to the technical field of epoxy self-adhesive paint, in particular to insulating waterborne epoxy self-adhesive paint and a preparation method thereof. The insulating water-based epoxy self-adhesive paint is prepared from the following raw materials: epoxy resin, a cosolvent, spherical organic silicon resin, a water-based coupling agent, an emulsifier, water, a latent curing agent, a leveling agent, a wetting agent and an antifoaming agent. The self-adhesive paint has the excellent effects of high temperature resistance, smoothness, low specific gravity, water resistance, salt spray resistance and insulation. The preparation method comprises the following steps: adding the spherical organic silicon resin and the coupling agent into water, heating, and carrying out heat preservation reaction to obtain a modifier; dissolving epoxy resin in a cosolvent, heating, adding the modifier and the emulsifier, uniformly stirring, and dropwise adding residual water until the viscosity is reduced in a cliff manner; finally, adding a latent curing agent, a leveling agent, a wetting agent and an antifoaming agent, keeping the temperature, and performing uniform dispersing to obtain a finished product. The preparation method is simple to operate and convenient for batch production.

The invention discloses a production process for flame-retardant color masterbatches, and relates to the technical field of color masterbatches. The production process comprises the following processsteps: S1, batching: a step of weighing the following raw materials in parts by weight: 40-60 parts of carrier resin, 10-20 parts of a pigment and 1-3 parts of a dispersing agent, wherein the carrierresin comprises, in percentages by weight, 50-60% of ABS resin and 40-50% of a flame-retardant filling material; S2, mixing: a step of crushing the carrier resin, then adding the dispersing agent, carrying out stirring for 40-50 min, adding the pigment, and carrying out stirring for 30-40 min; and S3, extrusion: a step of adding the raw materials mixed in the step S2 into a twin-screw extruder, and carrying out extrusion and granulation. The flame-retardant color masterbatch product is obtained by adopting the above-mentioned three steps. The preparation method provided by the invention has the advantage of improving the flame retardance of the color masterbatches.

The invention discloses renewable bio-based vinyl ester resin and a preparation method thereof. The resin is prepared by the following steps: carrying out reduced polymerization on polybasic acid, polybasic anhydride and lactic acid to obtain a block oligomer; further reacting the block oligomer and a reactive monomer to obtain the bio-based vinyl ester resin; and dissolving the bio-based vinyl ester resin into a reactive diluent, so as to obtain the renewable bio-based vinyl ester resin. With lactic acid, the polybasic anhydride and derivatives thereof as basic materials, the novel renewable bio-based vinyl ester resin is provided; the resin disclosed by the invention has the advantages of good mechanical property, relatively low shrinkage rate, low VOC emission and the like after being cured; and particularly, the resin disclosed by the invention has renewable performance and has excellent application and development prospects.

The invention discloses a preparation method of a modified cyanate ester resin with low volatility, and belongs to the technical field of preparation of high polymer materials. In the prior art, the condensable volatile matter loss and the mass loss of the existing epoxy resin toughened and modified cyanate ester resin in a space high-vacuum environment are high so as to highly affect a satelliteimaging system, and the heat resistance of the epoxy resin toughened and modified cyanate ester resin can be reduced. A purpose of the invention is to solve the problems in the prior art. According tothe invention, phenolphthalein polyethersulfone containing a benzene ring structure and a polyimide thermoplastic resin with a high glass transition temperature are selected to modify a cyanate esterresin to obtain the modified cyanate ester resin with low volatility, and the heat resistance of the resin is equivalent to the heat resistance of the cyanate ester resin body; and the modified cyanate ester obtained by the preparation method has the characteristics of good processing technology, excellent heat resistance, low volatility and the like, can meet the actual requirements of use of asatellite optical imaging system in an extreme environment, and can be widely applied to a light shield and an optical machine structural member of a satellite optical remote sensing system.

The invention provides a resin framework monomer taking 2,4-diacetyl-3-(4-bromophenyl)ethyl glutarate as a core. The molecular formula of the resin framework monomer is as shown in a formula I. The invention further provides a preparation method of the resin framework monomer, and the method comprises the following steps: mixing 2,4-diacetyl-3-(4-bromophenyl)ethyl glutarate and aliphatic diamine for modification to generate a reaction core, and performing grafting on the reaction core alternately to generate a 0.5-genreation product, a 1-genreation product, 1.5-genreation product, 2-genreation product and a 2.5-genreation product in sequence and finally generate a 3-genreation product, namely the resin framework monomer, wherein methyl acrylate is adopted as a reactant in reaction processes of half-generation preparation, and aliphatic diamine is adopted as a reactant in reaction processes of whole-generation preparation. The resin framework monomer prepared by the invention has a rigid structural main chain and thus has favorable salt resistance and thermal stability, and the effect is improved when the resin framework monomer is applied in an oilfield oil displacement polymer.

The invention relates to a transparent flame-retardant MPPO resin composition. The resin composition comprises PPO resin, PS resin, SPS resin, an SBC toughening agent, a flame retardant and an anti-dripping agent. According to the invention, five components with excellent compatibility, namely PPO, PS, SPS, SBC and a phosphate flame retardant, are selected and blended to obtain a transparent matrix; sBC is adopted as a toughening agent, preferably, the content of polybutadiene is 15-30%, and due to the fact that the content of polybutadiene is low, when the polybutadiene is dispersed in a matrix, the phase domain of the polybutadiene is small enough, and therefore the transparency of the material is not affected. Meanwhile, the SPS resin is also added and is opaque crystalline resin, and when the SPS resin is blended with the PPO / PS resin, the compatibility is good enough, so that even if the crystallization behavior of the SPS is changed, the crystallinity is obviously reduced, and the transparency of the material is not influenced.

The invention discloses a building material. The building material comprises, by weight, 5-25 parts of triethanolamine, 6-18 parts of silicon oxide, 6-18 parts of heavy calcium carbonate, 2-18 parts of polyvinyl alcohol, 3-13 parts of expanded perlite, 3-15 parts of sodium silicate, 1-17 parts of deionized water, 3-15 parts of Portland cement, 4-18 parts of glass beads, 4-18 parts of fly ash, 4-18parts of polyacrylonitrile fiber, 4-18 parts of modified epoxy resin, 3-13 parts of 2-hydroxy-4-methoxybenzophenone, 6-18 parts of heptyl 4-hydroxybenzoate, 3-17 parts of sulfonated melamine-formaldehyde resin and 3-13 parts of brominated bisphenol A epoxy resin. The building material has the advantages of good fracture resistance, good ultraviolet radiation resistance and long service life.

The invention discloses a linear polyurethane elastomer toughener toughening biopolyester PHA, and a preparation method and an application thereof, and belongs to the field of toughening of biodegradable polyesters. The preparation method comprises the following steps: injecting polycaprolactone diol, 1,4-butanediol and isophorone diisocyanate into a die under vacuumization or nitrogen protection conditions by adopting a catalyst-free one step synthesis process, and completing a chain extension reaction in a vacuum oven to prepare the degradable polyurethane elastomer toughener with different hard segment contents. The application of the toughener is characterized in that industrially produced biodegradable polyester PHA and the synthesized PU with different hard segment contents are mixed, a solvent is added, a solution casting process is adopted, ultrasonic treatment and a shaker are adopted to realize uniform mixing, and the obtained mixture is injected to a die, and undergoes film formation. Compared with pure brittle PHA, the PHA / PU composite film has greatly increased elongation at break, has an obvious toughening effect on the PHA due to the PU with different hard segment contents, can improve the comprehensive mechanical properties, obviously improves the toughness, and opens up a new way for the practical application of the PHA material.

The invention provides a cable material, and a preparation method and application thereof. The cable material is prepared from the following raw materials in parts by weight: 10-30 parts of polyethylene, 5-20 parts of silicone rubber, 5-15 parts of maleic anhydride graft EVA (ethylene-vinyl acetate), 0.5-10 parts of ethylene propylene diene monomer rubber, 40-65 parts of flame retardant, 2-5 parts of red phosphorus, 0.1-2 parts of silane coupling agent and 0.1-2 parts of triallyl isocyanurate. The preparation method comprises the following steps: banburying, extrusion and irradiation crosslinking. The cable material provided by the invention has the advantages of high flexibility, favorable insulativity, favorable flame retardancy, favorable oil resistance and favorable cold resistance, and is applicable to automobile wire insulating materials.

The invention provides an epoxy adhesive for preparing an assembled prefabricated wallboard mold and a preparation method of the epoxy adhesive. The epoxy adhesive is prepared from the following raw materials in parts by weight: 35 to 40 parts of bisphenol A epoxy resin E51; 5 to 10 parts of glycidyl ether; 0.1 to 0.3 part of a defoaming agent; 0.1 to 0.3 part of coupling agent, 50 to 60 parts ofactive silica powder, 5 to 10 parts of aluminum hydroxide, 30 to 40 parts of 4 '-diaminodiphenylmethane, 20 to 30 parts of propylene carbonate, 10 to 20 parts of Mannich amine, 10 to 40 parts of polyamide, 0.1 to 0.3 part of dibutyltin dilaurate and 0.1 to 0.5 part of thixotropic agent. The assembled building prefabricated wallboard mold manufactured through the scheme is high in compressive strength, high in temperature resistance, good in toughness, high in abrasion resistance, high in scratch resistance, high in surface smoothness, high in reuse rate and good in durability. The number of assembled building prefabricated wallboard molds manufactured through one mold is increased by multiple times, the manufacturing cost of each assembled building prefabricated wallboard is reduced to onefourth of the original manufacturing cost, and great economic benefits are achieved.

The invention provides a water-soluble oil-displacing polymer with a rigid core-shell structure, comprising a copolymer of acrylamide, sodium acrylate, dimethylallyl-p-alkylbenzyl ammonium chloride and functionalized backbone monomers, Average molecular weight is 7,000,000, and structure is as shown in I; Also provide above-mentioned polymer preparation method: branched polyamidoamine skeleton monomer solution is added dropwise in maleic anhydride solution, feed nitrogen simultaneously, in ice salt Reaction in the bath to obtain the functionalized skeleton monomer; then weigh the following raw materials in parts by weight: 14.3-20.5 parts of acrylic acid, 56.16-72.2 parts of acrylamide, 1.0-1.74 parts of dimethyl allyl-p-alkylbenzyl chloride Ammonium and 0.05-0.16 parts of functionalized backbone monomers, adding co-solvent, chain transfer agent and redox initiator, and reacting at 45-55°C for 5-9 hours at a constant temperature. The polymer of the invention has large molecular weight, high viscosity, good thermal stability and shear resistance.

The invention provides a self-toughening benzoxazine thermosetting resin with the structure shown in formula I. The present invention introduces long alkyl chains into the chemical structure of benzoxazine, so as to play a role of toughening, so that the obtained benzoxazine thermosetting resin has the characteristic of self-toughening; at the same time, through the form of chemical bonds, the long The introduction of the alkyl chain into the chemical structure of benzoxazine effectively avoids the problem of precipitation due to poor compatibility of traditional toughening agents. In addition, in the self-toughening benzoxazine thermosetting resin provided by the present invention, due to the addition of long alkyl chains, the concentration of oxazine rings is effectively diluted, thereby also significantly reducing the concentration of the self-toughening benzoxazine. The curing temperature of a thermosetting resin. In addition, long alkyl chains are introduced into the structure of benzoxazine, which can play a good role in internal plasticization, so the toughness of the self-toughening benzoxazine thermosetting resin cured product is also greatly improved .