46results about How to "Does not reduce hardness" patented technology

A conductive particle comprises a core particle and a conductive layer formed on the surface of the core particle. The core particle is formed from at least a resin or a metal. The surface of the conductive layer has a phosphorus-containing hydrophobic group.

A surface treatment agent for vulcanized rubber, comprising an organic solvent solution containing fluororesin particles in a ratio of 10-160 parts by weight with respect to 100 parts by weight in terms of solid content of a 1,2-polybutadiene containing an isocyanate group, the organic solvent solution using as a dispersing agent 2.5-20 parts by weight of a fluorine-containing surfactant based on an oligomer containing a perfluoroalkyl group. This surface treatment agent for vulcanized rubber has enhanced liquid stability of the organic solvent solution and enhances product torque evaluation and additional hardness and abrasion resistance overall in a coating film formed therefrom, and is effective for use as a coating agent or the like a seal lip part of an oil seal.

The invention provides a rubber composition which achieves higher silica dispersibility without lowering workability and hardness, while having excellently low fuel consumption properties; and a pneumatic tire which uses this rubber composition. A rubber composition which is obtained by blending 5-200 parts by mass of (B) silica relative to 100 parts by mass of (A) a diene rubber, 1-20% by mass of (C) a silane coupling agent relative to the silica, and 1-20% by mass of (D) a glycerol mono-fatty acid ester relative to the mass of silica, said glycerol mono-fatty acid ester being derived from a fatty acid having 8-24 carbon atoms. With respect to this rubber composition, 10 parts by mass or more in 100 parts by mass of the component (A) has a heteroatom-containing functional group in the main chain and / or at an end.

The invention relates to an agent for promoting fruit coloration of Nanguo pear. The agent is aqueous and dedicated for Nanguo pear, and can increase the 'red fruit' rate by regulating and controlling the synthesis and metabolism of anthocyanidin in Nanguo pear. The agent contains the following components: uniconazole 0.1g / L, sucrose 1g / L, potassium sulfate 1g / L, calcium chloride 3g / L, levulinic acid 0.1g / L, glutamic acid 1.0g / L, tyrosine 0.3g / L, phenylalanine 0.3g / L, boric acid 0.3g / L, Tween 100 1ml / L, and water in balance. The agent is prepared by the following steps: (1) respectively weighting uniconazole, sucrose, potassium sulfate, calcium chloride, levulinic acid, glutamic acid, tyrosine, phenylalanine, boric acid and Tween 100 at the given ratio; (2) respectively dissolving the materials in water, wherein uniconazole is dissolved with methanol; glutamic acid, tyrosine and phenylalanine are dissolves with distilled water at 100 DEG C; and potassium sulfate and calcium chloride are dissolved with distilled water at 50-70 DEG C; mixing after dilution; adding water until the desired concentration; and stirring thoroughly to obtain the final product. The agent can increase the 'red fruit' rate of Nanguo pear by 14%, and is convenient to use and harmless and innoxious to human body and environment.

The invention relates to the field of an epoxy resin-based composite material, in particular to a method for modifying a nanometer carbon material to enhance an epoxy resin-based composite material. Hydrogen in carboxyl is replaced by ammonium ions by utilizing hydrolysis of rich O=C-O structural functional groups (such as carboxyl, anhydride and lactone) on the surface of a nanometer carbon material (such as nanometer diamond, a nanometer carbon tube and graphene) as well as the characteristic that an acidic carboxyl functional group is liable to react with ammonia water, so that the aim of modifying a specific nitrogen-containing group on the nanometer carbon material is fulfilled. The modification process is green and pollution-free, and the volatilized ammonia water can be effectivelycollected and recycled. The modified nanometer carbon material is compounded with the epoxy resin material; and compared with the epoxy resin-based composite material without adding the nanometer carbon material or added with the unmodified nanometer carbon material, the obtained composite material greatly improves the storage modulus under the conditions of not reducing hardness, breaking tenacity and tensile strength. The process is simple, economic, efficient and environmentally friendly, and the industrialization problem of the high-performance nanometer carbon material-epoxy resin composite material is solved.

The invention relates to the field of local annealing heat treatment of carburized parts and specifically relates to a local softening method of high-strength alloy steel carburized parts. The local softening method can be applied to manufacturing the carburized parts having different requirements on the hardness of the high-strength steel. A carburized locking pin is locally heated by use of fused salt in a salt-bath furnace; the locking pin is made of martensitic steel 16Cr3NiWMoVNbE; an annealing heat-protective fixture is adopted for performing heat protection on the carburized surface of the locking pin part, and the local annealing part is heated till a temperature above 600 DEG C for softening. The local softening method of the high-strength alloy steel carburized parts is capable of reducing the hardness of the flaring positions of the parts and preventing the parts from cracking in the flaring process under the condition of guaranteeing the hardness of the carburized surfaces. According to the local softening method, the method of rapid heating annealing by use of protective salt bath is adopted for performing annealing treatment on the gear locking pin, so that the high strength of the carburized surface and the base body of the part can be prevented from reduction, and the hardness of the portion needing to be deformed can be reduced, and as a result, the cracking problem in the flaring deformation process of the part is solved.