41results about How to "To achieve toughening effect" patented technology

The invention belongs to the field of all-ceramics materials for the dentistry, and discloses a strengthening-toughening glass ceramic and a preparation method thereof. The strengthening-toughening glass ceramic comprises the following components in percentage by mass: 96 to 99% of basic component, and 1.0 to 4.0% of toughening component, wherein the basic component comprises the following components in percentage by mass: 58 to 62% of SiO2, 28 to 30% of Li2CO3, 3.5 to 4.0% of K2CO3, 2.5 to 3.0% of Al2O3, 11.4 to 1.6% of CeO2, and 2.6 to 3.0% of P2O5, and the toughening component is ZrO2.

The invention relates-an environmentally-friendly underfill adhesive having a low dielectric constant, and a preparation method thereof, and belongs to a one-component epoxy resin adhesive. The underfill adhesive comprises, by weight, 30-38 parts of epoxy resin, 8-20 parts of a curing agent, 33-46 parts of a filler, 2-5 parts of a diluent, 6-9 parts of a toughener, 0.3-0.5 part of a silane coupling agent, 0.3-0.5 part of an antifoaming agent and 0.2-0.8 part of a pigment. The underfill adhesive prepared in the invention has the advantages of low halogen content, low dielectric constant, high arc resistance, high weather resistance and the like, so packaging components have a high environmental protection property, a high electrical insulation property and a high reliability.

The invention relates to a toughening epoxy resin composition for copper-clad plate. Except for lower dielectric constant and dielectric loss, the toughening epoxy resin composition has excellent mechanical property, high heat resistance and flame retardant property, also has a more compact structure, and can meet the demand of the copper-clad plate for a high-frequency circuit board.

The invention relates to a talcum powder master batch and a preparation method thereof. The talcum powder master batch comprises the following components: 75-84% of talcum powder, 15-25% of ethylene-octene copolymer, 0.3-0.6% of antioxidant and 0.3-0.6% of lubricant. The preparation method of the talcum powder master batch comprises the following steps of: adding all the components to a banbury mixer for banburying according to the proportion, wherein the banburying time ranges from 5 to 7 min and the temperature ranges from 110 to 130 DEG C; next, adding the mixture to a double-screw extruder for mixing, wherein the extrusion temperatures of the first section and the second section of the double-screw extruder range from 150 to 170 DEG C, and the extrusion temperatures of other several sections range from 170 to 200 DEG C; and the total stay time of the mixture in the double-screw extruder ranges from 3 to 8 min; and finally, extruding the obtained material, and then cooling and the material and performing grain-sized cutting, thereby obtaining the desired talcum powder master batch. As the talcum powder master batch is used, the dust pollution caused in the use of the traditional talcum powder is solved, and the tenacity of a modified polypropylene material can be improved so that the modified polypropylene material can keep excellent rigidity.

The invention relates to a high-tenacity conducting nanocomposite material and a preparation method thereof. The electrical conductivity of a polymer material is improved, at the same time, the mechanical properties, especially shock resistance, of the material is improved. The composite material uses carbon nanotubes as an electrically-conducting part, and is added with inorganic rigid calcium carbonate nano particles, further improves the electrical conductivity of the composite material by utilization of the volume exclusion effect of nano calcium carbonate, and at the same time, the inorganic toughening effect is achieved through the surface modification of nano calcium carbonate. The preparation method provided by the invention is simple and is suitable for industrial production; and the prepared composite material has high elastic modulus, impact strength and specific conductivity.

The invention discloses an antistatic reinforced PP/ABS alloy material and a preparation method thereof. The antistatic reinforced PP/ABS alloy material comprises the following raw materials in parts by weight: 35-55 parts of PP, 15-30 parts of ABS, 2-5 parts of a compatilizer, 0.3-0.6 part of a coupling agent, 0.3-0.5 part of a compound antioxidant, 3-5 parts of a compound antistatic agent, 0.3-0.5 part of a lubricant and 15-30 parts of alkali-free glass fiber. The antistatic reinforced PP/ABS alloy material has the advantages of high heat-resistance temperature, low shrinking percentage, low surface impedance, good mechanical property, wide application range and the like.

The invention belongs to a polyvinyl chloride (PVC) floor, in particular to a double-layer anti-static PVC plastic floor. The anti-static PVC plastic floor with a double-layer structure is characterized by comprising the double-layer structure, wherein a surface layer is formed by auxiliary material, and a bottom layer is formed by main material; the formula of the main material of the anti-static PVC plastic floor contains the following components in parts by weight: 100-120 parts of PVC resin, 8-10 parts of lead sulfate tribasic, 200-250 parts of kaolin, 25-30 parts of dipentaerythritol, 5-10 parts of carbon black, 4-6 parts of dibutyl phthalate, 5-10 parts of ethoxylation aliphatic alkyl amine and 10 parts of paraffin; and the formula of the auxiliary material contains 100-120 parts of PVC resin, 10-12 parts of methacrylate-butadiene-styrene (MBS) resin, 3-5 parts of zinc stearate, 4-6 parts of dibutyl phthalate, 5-8 parts of lead sulfate tribasic and 2-4 parts of di-tert-butyl hydroquinone. In the anti-static PVC plastic floor with the double-layer structure, a high polymer plasticizing system is applied, so that the release of volatile organic compounds can be greatly reduced, and the anti-static PVC plastic floor meets the requirement of environmental protection; furthermore, the double-layer structure is adopted, and the surface-layer structure has good wear resistance and other excellent performance.

The invention provides a halogen-free flame-retardant high-toughness bulk molding compound and a method for preparing the same, and relates to the technical field of bulk molding compounds. The halogen-free flame-retardant high-toughness bulk molding compound comprises unsaturated polyester-polyurethane composite resin, curing agents, modified inorganic flame-retardant fillers, organic flame retardants, modified heavy calcium carbonate, release agents, reinforcement fibers, auxiliaries and toner. The method includes mixing raw materials for the halogen-free flame-retardant high-toughness bulkmolding compound with one another to form a compression molding or injection molding adhesive composite material 'in the shape of oil putty'; molding the compression molding or injection molding adhesive composite material by the aid of mold pressing processes to obtain the halogen-free flame-retardant high-toughness bulk molding compound. The halogen-free flame-retardant high-toughness bulk molding compound and the method have the advantages that unsaturated polyester and thermoset polyurethane interpenetrate network polymers, accordingly, the rigidity and the toughness of the halogen-free flame-retardant high-toughness bulk molding compound can be obviously improved, and the contraction ratio of the halogen-free flame-retardant high-toughness bulk molding compound can be reduced; multiple inorganic/organic composite halogen-free flame-retardant systems are used, synergistic effects can be realized by the multiple inorganic/organic composite halogen-free flame-retardant systems, accordingly, the halogen-free flame-retardant high-toughness bulk molding compound can be free of halogen and low in smoke and is nontoxic, environmental impact can be minimized, and the flame retardance of the halogen-free flame-retardant high-toughness bulk molding compound can be optimized.

The invention provides a sintering process of a petroleum fracturing propping agent, wherein the sintering process comprises the following steps: removing impurities from potassium feldspar, drying, and pulverizing to obtain potassium feldspar fine powder; uniformly mixing the potassium feldspar, graphite powder and magnesium powder, introducing protective gas, firing for 1-2 h at the temperatureof 600-700 DEG C, heating to 950-1100 DEG C, firing for 1-2 h, cooling, taking out, and crushing again to obtain secondary powder; and mixing the secondary powder with light calcined clay, sodium tripolyphosphate and tuff, carrying out spray mixing granulation and polishing to obtain ceramic primary particles, introducing protective gas, sintering the ceramic primary particles at the temperature of 1150-1210 DEG C for 0.5-1 h, continuously heating to 1250-1350 DEG C, and sintering for 1-2 h to obtain the petroleum fracturing propping agent. The method avoids the application of high-aluminum minerals, ensures the performance of the petroleum fracturing propping agent as much as possible, and has a great application prospect.

Graphene aluminum-based composite powder used for laser deposition manufacturing, and a preparation method and application thereof belong to the field of metal-based composite materials. In the graphene aluminum-based composite powder used for laser deposition manufacturing, the mass ratio of a few layers of graphene nanosheets prepared by a thermal expansion-ultrasonic combined method to aluminummatrix powder equals to 1: (666-1999), and the sphericity is 0.85-0.9. The few layers of graphene nanosheets are prepared by the thermal expansion ultrasonic combined method, and wet ball-milling isadopted, so that the few layers of graphene nanosheets are uniformly dispersed on the surface of aluminum powder particles under a scanning electron microscope. The laser deposition process is adoptedfor forming, and a graphene aluminum-based composite workpiece has good interface bonding, strong compactness, no pore defects, and improved strength and toughness.

The invention discloses modified cyanate resin and a preparation method thereof. The preparation method comprises the following steps: uniformly mixing 100 parts by mass of molten cyanate resin and 0.10-1.55 parts by mass of poly ionic liquid modified carbon nanotube hybrid material, and carrying out curing and after-treatment to obtain the modified cyanate resin. The synthesis process of the poly ionic liquid modified carbon nanotube hybrid material comprises the following steps: 1. synthesizing amino-terminated ionic liquid containing a transition metal; and 2. carrying out in-situ polymerization by using the ionic liquid to coat the carbon nanotubes. Compared with the cyanate resin, the modified cyanate resin prepared by the method disclosed by the invention has the advantages of favorable curing manufacturability, higher toughness, higher heat stability, stable dielectric constant and lower dielectric loss. The preparation method of the modified cyanate resin has the characteristics of simple technique, high controllability and the like.

The invention provides mullite fiber toughened pot clay for pottery, and belongs to the technical field of ceramic materials. The mullite fiber toughened pot clay is prepared from the following components in parts by mass: 30 to 40 parts of kaolin, 25 to 35 parts of quartz, 10 to 20 parts of hydromuscovite, 1 to 6 parts of mullite fiber, 4 to 10 parts of alumina particles, 10 to 20 parts of attapulgite and 4 to 10 parts of graphene. According to the mullite fiber toughened pot clay provided by the invention, the mullite fiber and the alumina particles are added in a conventional pot clay formula, so that the toughness of pot clay is increased by combining the mullite fiber with the alumina particles; meanwhile, by combining a fiber toughening technology with a particle toughening technology, the toughness of the pot clay can be greatly increased through compound toughening.

The invention discloses a method for preparing a high-toughness cottonseed protein based composite membrane. The method comprises the following steps: (1) refining cottonseed protein; (2) preparing acottonseed protein solution and a water-soluble high polymer solution; (3) adding the cottonseed protein solution into the water-soluble high polymer solution, and carrying out uniform stirring at a certain temperature, so as to obtain a solution A; (4) adding a tertiary amine based alcoholic reagent into the solution A, and carrying out stirring for 1 to 5 hours in a thermostatic water bath withthe temperature of 40 DEG C to 60 DEG C, so as to obtain a solution B; and (5) after the solution B is cooled, preparing the cottonseed protein based composite membrane with relatively good toughnessby a casting method. Water-soluble high polymers include, but not limited to, polyvinyl alcohol, polyethylene oxide and gelatin; the addition level of the tertiary amine based alcoholic reagent is 5%to 30% the total mass of the cottonseed protein and the water-soluble high polymers; and a mass ratio of the cottonseed protein to the water-soluble high polymers is (9: 1) to (1: 9). According to themethod, on one hand, the tertiary amine based alcoholic reagent serves as a plasticizer, and thus, the elongation at break of the protein membrane is increased; and on the other hand, the tertiary amine based alcoholic reagent serves as a physical cross-linker, cross-linked bridges are formed between molecular chains of the cottonseed protein and the high polymers through hydrogen bonds under theaction of tertiary amine groups with relatively high electronegativity, a novel cross-linked network is formed, and thus, the tensile strength of the protein membrane is enhanced. Thereby, the high-toughness cottonseed protein based composite membrane is prepared.

This invention involves a aromatic amine epoxy curing agent and its preparation. The curing agent takes the nonylphenol and dibromo substitute hydrocarbon as raw materials. After coupling, nitration, reduction to obtain. Not add any toughening agent circumstances, impact toughness of curing product risen 30% than ordinary aromatic amine curing agent, also molecule contains more amid, making the curing agent activity, in the medium temperature (60-100 C degree) curing resins, made up the shortcomings of high curing temperature of aromatic amine curing agent.

The invention relates to a preparation method of a high-strength casting coating for a stainless steel casting, and belongs to the technical field of casting coatings. According to the preparation method of the high-strength casting coating for the stainless steel casting, zirconium sand, zirconium oxide whiskers and silicon carbide whiskers are used as refractory fillers, the zirconium oxide whiskers and the silicon carbide whiskers are modified by ethyl orthosilicate to prepare the high-strength casting coating for the stainless steel casting, the zirconium oxide whiskers and the silicon carbide whiskers are added into the coating, so that the strength of a coating film can be effectively improved; when the whiskers are subjected to external acting force, the whiskers bridged in the coating film can generate acting force to force cracks to be closed, so that the effect of consuming some external force to do work is achieved, then the toughness and strength of the coating film are improved, and when the cracks are diffused to the whiskers from the surface of the coating film, the diffusion direction of the cracks can be changed; and the cracks are diffused along the whiskers due to dissociation of the whiskers and the coating film, so that the area of the formed new surface is increased, the cracks can be within the critical size of the new surface, and the coating film is further reinforced.

The present invention provides a modified thermoplastic polymer material, the modified thermoplastic polymer material comprises an epoxy resin cured coated matter, a ligament imitation material and a to-be-modified thermoplastic polymer which are in turn connected by interwining, and the ligament imitation material includes a functional thermoplastic elastomer, an additive and the like. The modified thermoplastic polymer material selects the epoxy resin cured coated matter as an inner core material, inorganic powder can be highly dispersed in the system, and the functional thermoplastic elastomer and the like are selected as the ligament imitation material for preferential reaction with surface groups of the epoxy resin cured coated matter, so that the functional thermoplastic elastomer and the like are strongly fixed around the epoxy resin cured coated matter, a toughening effect is achieved, at the same time, the strength of the to-be-modified thermoplastic polymer is basically not damaged, and the to-be-modified thermoplastic polymer has high toughness, high flexibility, high strength, low shrinkage and the like.

The invention relates to a method for toughening sulfur-coated controlled-release fertilizer, comprising the following steps: (1) uniformly mixing epoxy resin and toughening agent to obtain a toughening resin premix; (2) making the toughening resin premix Mix evenly with the curing agent to prepare a mixed solution; (3) spray liquid sulfur on the surface of the core fertilizer to obtain sulfur-coated fertilizer particles; (4) spray the mixed solution on the surface of the sulfur-coated fertilizer particles to obtain toughened Sulfur controlled release fertilizer. The present invention uses carboxyl-terminated hyperbranched polyester HBP-SA or carboxyl-terminated liquid nitrile rubber as a toughening agent. These two toughening agents can not only play a toughening role, but also enhance the sealing effect of the membrane material , to achieve the purpose of spraying the toughening resin on the sulfur-coated controlled-release fertilizer without spraying the sealing agent, thereby reducing the spraying steps.