50results about How to "Improves tensile strength properties" patented technology

The invention discloses an aqueous elastic fluorocarbon building coating covering large cracks, and a preparation method and an application thereof. A raw material formula of the aqueous elastic fluorocarbon building coating comprises, by mass, 30.0-60.2% of an aqueous elastic fluorocarbon emulsion, 2.0-3.0% of hydroxyethyl cellulose, 7.0-14.0% of an inorganic pigment, 10.0-35.0% of a filler, 5.0-7.0% of a collagen fiber, 1.1-1.8% of a glass fiber short cut protofilament, 1.1-3.2% of a wetting dispersant, 0.4-1.2% of a multifunctional assistant, 0.3-0.5% of an antifoaming agent, 0.3-4.2% of a bactericide, 0.2-3.2% of a thickening agent, 0.8-1.2% of a film forming assistant, 1.6-7.0% of an antifreeze agent and 10.0-25.0% of water. The aqueous elastic fluorocarbon building coating can cover 4mm or more cracks of building walls, and is safe and environmentally friendly.

The invention provides a waterborne binder, comprising components A and B; the component is made from, by weight, 40-60 parts of waterborne epoxy acrylic emulsion, 22-48 parts of a pigment-filler, 1-2parts of a film-forming agent, 2-3 parts of an aid, and 12-30 parts of water; the component B is made from, by weight, 3-4.5 parts of a curing agent. The waterborne binder is applicable to containerprimers, has the same effect as oil primers to protect the integrity of container bodies, has excellent wet adhesion, pull adhesion and pull strength, has an equivalent active cycle to oil primers, has good resistance to salt fog, is green, and never causes a reduction to the customers' existing production rhythm.

The systems and methods described herein relate to an improved stretchable hose apparatus which enables the transmission of high-throughput signals along several conductors within a conductor cable. In particular, the stretchable hose enables consistent high speed communications and high power transmission between a buoyant object and an optional underwater device in all weather conditions by permitting compression of the conductor cable in a first range of hose extensions and limiting elastic elongation of the conductor cable in a second greater range up to full hose extension.

The invention discloses a preparation method for preparing dual composite natural rubber from illite-smectite clay intercalated silica. The method mainly comprises the steps of processing a nano-scale illite-smectite clay material by adopting an intercalating agent, further damaging a close and ordered packed structure of laminar silicate to form layered basic units by peeling, then mixing and melting with a suspension mixed with natural latex and silica, uniformly dispersing in a polymer matrix, finally realizing intercalation composition of a natural rubber high polymer, silica and layered silicate lamellae on nano scale and completing the manufacturing of a finished product through continuous production.

The invention discloses a polypropylene enhanced double-wall corrugated pipe, and relates to the field of polypropylene corrugated pipes. The polypropylene enhanced double-wall corrugated pipe manly comprises a straight pipe layer and a corrugated outer pipe layer, wherein the straight pipe layer is provided with a smooth inner wall; the corrugated outer pipe layer is of an annular structure; the corrugated outer pipe layer is externally sheathed on the outer wall of the straight pipe layer; the formula of the straight pipe layer and the corrugated outer pipe layer is prepared from basic material and auxiliary materials, the basic material is prepared from polypropylene component, and the auxiliary materials is prepared from active calcium carbonate powder, fiber and a lubricating stabilizer, so as to realize the function of high strength of the corrugated pipe body.

The invention relates to a base film for a transparent electrode film and the transparent electrode film using the same, and more particularly to the base film used for the transparent electrode film and the transparent electrode film using the same, wherein the base film has advantages of excellent dimension stability, effective transparency improvement and effective heat resistance improvement. The base film comprises the components of a base layer; and a dimension stabilizing layer which is formed on one surface or two surfaces of the base layer. The base film is used as a thermoplastic engineering plastic and has advantages of high impact resistance, high heat resistance, high moisture resistance and excellent tensible strength property.

The invention relates to the technical field of high polymer materials, in particular to a reversible crosslinked ethylene propylene diene monomer and a preparation method thereof. According to the preparation method of the reversible crosslinked ethylene propylene diene monomer, the double-bond-containing ethylene propylene diene monomer and 2-carboxyl imidazole are subjected to a click reaction to obtain a carboxyl-grafted modified elastomer; and then amidation reaction is performed on the carboxyl-grafted modified elastomer and an amino-containing compound to obtain the reversible cross-linked ethylene propylene diene monomer, wherein the amino-containing compound is an oxygen-containing amino compound, so that the recyclable modified EPDM rubber is obtained, and the performance of the rubber is superior to that of a traditional sulfur cross-linked product. Compared with the prior art, the reversible crosslinked ethylene propylene diene monomer has the advantages of excellent tensile strength performance and high elongation at break, and can be directly recycled. The method is simple, raw materials are easy to obtain, cost is low, and the method can be widely applied to daily life and industrial production.

The invention discloses a composition for preparing a denture material. The composition is prepared from the following raw materials in parts by weight: 10 to 25 parts of stable tetragonal zirconia, 0.5 to 1.0 part of alumina, 10 to 25 parts of methyl polymethacrylate, 25 to 48 parts of starch, 3 to 8 parts of yttria, 0.5 to 2.5 parts of a dispersant, 0.2 to 0.3 part of a plasticizer and 1.5 to 3parts of a water-soluble adhesive. According to the composition disclosed by the invention, the problem that traditional glass ceramic-based and alumina-based ceramic materials are easy to crack and insufficient in antibacterial performance as the traditional glass ceramic-based and alumina-based ceramic materials are insufficient in intrinsic strength and larger in brittleness can be effectivelysolved, and meanwhile, the mechanical performance of denture is effectively increased, so that the requirements of doctors and patients on the denture can be met. The stable tetragonal zirconia is added in the composition, so that the prepared denture has higher hardness; the dispersant is added in the composition, so that the prepared denture is more stable. According to the composition disclosedby the invention, parameters of the composition of the denture material are further improved, the prepared denture is excellent in properties of hardness, bending strength and tensile strength, and the application prospect is wide.

The invention belongs to the technical field of high polymer materials, and discloses ion crosslinking modified ethylene propylene diene monomer rubber and a preparation method thereof. The ion-crosslinked ethylene propylene diene monomer is prepared from the following raw materials in parts by weight: 100 parts of ethylene propylene diene monomer, 5-10 parts of isocyanate containing an electron-enriched conjugated diene structure, 2-5 parts of an initiator, 3-8 parts of a grafting modifier, 3-5 parts of bismaleimide and 0.5-2 parts of an ionic bond cross-linking agent. The preparation methodcomprises the following steps: performing a reaction on furfuryl alcohol and isocyanate to synthesize the isocyanate containing electron-rich conjugated diene structure; adding carboxylic acid graftedEPDM, and introducing an electron-rich diene structure into an EPDM macromolecular chain through click reaction of carboxylic acid and isocyanate, so that a side group of the EPDM contains a D-A reaction active group; and then adding bismaleimide and an ionic bond cross-linking agent, and refining the materials to obtain the product. The ion crosslinking modified EPDM rubber is excellent in tensile strength performance and high in elongation at break, and can be directly recycled.

The invention provides a polyimide film and a preparation method thereof, the polyimide film is mainly prepared from a mixed diamine monomer, and the mixed diamine monomer comprises an aryl diamine monomer and a 3, 3 '-biphenyl diamine monomer. The molar ratio of the aryl diamine monomer to the 3, 3 '-p-aminodiphenyl ether is (3-5): (2-4), and the chemical structural formula of the aryl diamine monomer is formed by mixing one or more of the following structural formulas. And the polyimide film with low dielectric loss meets the communication requirements of the current 5G technology.

The invention relates to the technical field of materials for cables, in particular to an insulated and flame-retardant cable. Raw materials of an insulating layer comprise 100 parts of an ethylene-methacrylic acid copolymer, 20-30 parts of polyamide resin, 60-80 parts of hyperbranched polyether modified melamine and 1-10 parts of an auxiliary. According to the insulated and flame-retardant cable, halogen-containing polyvinyl chloride and other halogen-containing base materials are not required to be added, and a better flame retardant effect can be realized; under the synergistic effect of all components, the water absorbency of the insulating material is reduced, the high flame retardant effect is realized, meanwhile, the high electric insulation effect is realized, and the insulating material still has better electric insulation stability under the wet condition; the problems that mixing is difficult, the extrusion pressure is high and the like in the processing process are solved, the production process is simplified, the requirements for equipment are reduced, the production cost is reduced, and the purpose of industrial production is achieved.

The invention provides an amide-containing polysubstituted aromatic diamine monomer and a preparation method thereof, the structural formula of the amide-containing polysubstituted aromatic diamine monomer is shown in the specification, R1 and R2 are one of-H,-CF3,-OCH3 or alkyl, R3 is one of aryl or alkyl, and Ar1 and Ar2 are aromatic rings or aromatic heterocyclic rings. The invention provides two preparation methods, one is a base catalysis synthesis method, and the other is an ionic liquid catalysis method. The diamine monomer can be applied to the preparation of a high-performance polyimide film material containing an amide structure, and can further improve the potential application values of dissolution film-forming property, optical transparency, tensile strength property, dielectric loss property and the like of the prepared polyimide film material.

The invention discloses a heat-vulcanized adhesive and a preparation method thereof. The heat-vulcanized adhesive is prepared from the following raw materials in parts by weight: 25-40 parts of phenoxy resin, 15-25 parts of methyl vinyl silicone rubber, 3-10 parts of stearic acid, 2-6 parts of zinc oxide powder, 1-6 parts of activated calcium carbonate, 0.5-3 parts of an accelerant, 0.2-2 parts ofsulfur, 0.1-1 part of a vulcanizing agent PM and 0.1-2 parts of nano titanium dioxide. The heat-vulcanized adhesive is excellent in bonding strength, 90-degree peel strength and tensile strength, thepreparation method is simple and convenient, the manufacturing cost is low, and large-scale popularization is facilitated.

The invention relates to the technical field of new materials, especially to a processing method of fully-degradable resin. The processing method comprises the following steps: grinding rice straw andrice husk to obtain straw powder, mixing the straw powder with high molecular weight polylactic acid, low molecular weight polylactic acid, a biodegradation additive, reinforced fibers, a silane coupling agent, a heat stabilizer, a plasticizer and a calcium nitrate solution and reacting to obtain a precipitate A; adding a sodium hydroxide solution to obtain a precipitate B; adding dimethyl formamide and maleic anhydride, and mixing to obtain a precipitate C; and mixing the precipitate C with nano-titanium dioxide, a resin material and sodium carboxymethylcellulose to obtain the fully-degradable resin. By using the rice husk and rice straw as the raw materials, the produced resin has strong environmental protection property and is low-cost. The produced fully-degradable resin has high tensile strength; and the postprocessing problem that rice straw needs to be burned or landfilled is solved.

The invention provides a cyano-containing polysubstituted aromatic diamine monomer, the structural formula of the cyano-containing polysubstituted aromatic diamine monomer is shown in the specification, and R1 and R2 are one of-H,-CF3,-OCH3 or alkyl. The diamine monomer can be applied to the preparation of a high-performance polyimide film material, and can further improve the potential application values of dissolving film-forming property, optical transparency, tensile strength property, dielectric loss property and the like of the prepared polyimide film material.