35results about How to "Improve high temperature aging resistance" patented technology

Provided is an annular adhesive synthesizing method. The method comprises the steps of: adding 40-60 parts of triallyl isocyanurate and 0.0015-0.0040 parts of platinum catalyst into a three-necked flask; at the 65-80 DEG C reaction temperature, slowly dropping 17-28 parts of 1,1,3,5,5-pentamethyl-3-phenyl trisiloxanes into the three-necked flask,and finishing the dropping within 0.5 hours; and stirring and reacting the mixture for 3-4 hours; adding 21-33 parts of trimethoxysilane into the three-necked flask and finishing the dropping within 0.5 hours; continuing the stirring and reaction for four hours; and then stopping the reaction; and removing low boiling materials by performing distillation at a reduced pressure. 6-9 parts of activated carbon are added into the substance, stirring and adsorbing are performed for 12 hours, and the annular adhesive is obtained after the material is filtered.

The invention discloses a damping and shock-absorbing thermoplastic elastomer material. The raw materials include: 20-80 parts of TPV thermoplastic elastomer, 10-80 parts of TPE thermoplastic elastomer, 2-30 parts of polyolefin resin, and 2 parts of processing oil. -20 parts, 0.1-5 parts of processing aids, 0.1-1 parts of anti-aging agent, 0.6-0.8 parts of dicumyl peroxide, wherein, TPE thermoplastic elastomers are aliphatic olefin thermoplastic elastomers, styrene thermoplastic elastomers at least one of the body. The invention also proposes a preparation method of the above-mentioned damping and shock-absorbing thermoplastic elastomer material. The invention has good hand feeling, good mechanical performance, excellent damping and shock absorption performance, and good high-temperature pressure change performance.

The invention provides an intelligent slow-bonding prestressed steel strand and a preparation method thereof. The intelligent slow-bonding prestressed steel strand comprises: a fiber-reinforced composite smart bar of an optical fiber sensor, an edge wire, and a slow-bonding type bond agent and sheath, the edge wire is kinked on the outer circumference of the smart bar to form an intelligent prestressed steel strand, and the slow-bonding adhesive is coated on the outer circumference of the intelligent prestressed steel strand, so that the intelligent prestressed steel strand is formed. The stranded wire is bonded to the sheath; the raw materials for preparing the slow-bonding adhesive include: epoxy resin, curing agent, diluent and filler. The slow-bonding adhesive adopts the compound of fluorine-containing polyamide, low-molecular-weight polyamide and carboxyl-functional silicone as a curing agent to cure the main resin, and utilizes the curing reaction of carboxyl and epoxy groups. Organosilicon is introduced into the slow-adhesion adhesive to obtain the slow-adhesion adhesive with good heat resistance and high temperature aging resistance.

The invention discloses a preparation and application method of an assistant for improving high-temperature aging resistance of transformer insulating paper and belongs to the field of the transformer insulating paper. The method comprises the steps of compounding a polyvinyl pyrrolidone macromolecular compound with a high-temperature self-crosslinking property, an initiator and a nitrogen containing compound so as to prepare the heat-resistant assistant, and applying the heat-resistant assistant to the surface of the insulating paper by a coating, spray-coating or dipping method. Polyvinyl pyrrolidone is subjected to a self-crosslinking reaction in the presence of the initiator at a high temperature so as to form a three-dimensional network structure, and fibers of the paper are interwoven in a chemical bond forming manner, so that the bonding action among the fibers is enhanced, and the improvement on the aging resistance of the paper is facilitated. According to the insulating paper prepared by adding the heat-resistant assistant disclosed by the invention, the high-temperature aging resistance is excellent and is improved by 15% to 30% under the same conditions, and the insulating performance of a transformer system is not affected.

The invention relates to a high-temperature wear-resisting ceramic composite fiber brake block which is manufactured by processing framework materials and auxiliary materials through material mixing, mould pressing, hot press molding and solidification procedures, wherein the framework materials comprise bismaleimide modified phenolic resin, short aramid fiber, high-purity ceramic fiber, potassium titanate fiber, mineral fiber, barium titanate and nickel; the auxiliary materials comprise molybdenum sulfide and / or tin sulfide, graphite and / or coke, acrylonitrile-butadiene rubber, mica, zinc oxide, stearic acid, barium sulfate and 4010-type antiager. The high-temperature wear-resisting ceramic composite fiber brake block solves the problems existing in the prior brake blocks, can well avoid high-speed decay and high-temperature decay, has the advantages of being good in staibility and long in service life, and is a high-temperature wear-resisting ceramic composite fiber brake block which is low in noise, high in intensity and low in pollution.

The invention belongs to the technical field of construction materials, and provides a self-adhesive waterproof glue applied to a metal roof. The self-adhesive waterproof glue is composed of followingcomponents in percentage by weight: 35 to 60% of asphalt, 5 to 12% of naphthenic base rubber oil, 2 to 8% of SBS, 3 to 10% of powdery butadiene styrene rubber, 2 to 15% of desulfurized regenerated tire rubber powder, 2 to 5% of terpene resin, 2 to 5% of hydrogenated C5 resin, 2 to 8% of a modifier, 10 to 35% of a filling material, and 0.5 to 1.5% of a coupling agent. The preparation method comprises following steps: adding asphalt and naphthenic base rubber oil, stirring, raising the temperature to 140 DEG C, carrying out dehydration for 0.5 hour, adding desulfurized regenerated tire rubber powder and powdery butadiene styrene rubber, raising the temperature to 180 DEG C, stirring for 1 hour, adding SBS, stirring for 1 hour at a temperature of 180 DEG C, maintaining the temperature of 180DEG C, adding the modifier, stirring for 1 hour; then adding terpene resin and hydrogenated C5 resin, stirring for 15 to 20 minutes at a temperature of 176 DEG C, grinding, dispersing for 40 to 50 minutes, adding the filling material and the coupling agent, raising the temperature to 160-170 DEG C, and stirring for 40 to 60 minutes. The problems that in the prior art, the high temperature resistant performance of a conventional self-adhesive glue is bad, and the self-adhesive glue is difficult to peel off after aging or water soaking are solved.

The invention relates to a ternary catalyst. The ternary catalyst comprises a cellular carrier, and is characterized in that a lower layer coating is adhered on the cellular carrier, an intermediate Rh coating is adhered on the lower layer coating, an upper layer Rh coating is adhdred on the intermediate Rh coating, the mass ratio of the Rh loaded in the intermediate layer Rh coating to the Rh loaded in the upper layer Rh coating is (1-5): 1, the Pd or Pt is loaded on the lower layer coating. The Rh in the upper layer Rh coating is loaded on a cerium-zirconium solid solution, and the component of the cerium-zirconium solid solution is as follows: one or a plurality of 20wt%-70wt% of ZrO2, 20wt%-70wt% of CeO2 or 10wt%-15wt% of La2O3, Y2O3, Pr6O11, Nd2O3, the Rh in the intermediate Rh coating is loaded on zirconia composite oxide, the component of the zirconia composite oxide is one or a plurality of 80wt%-90wt% of ZrO2 or 10wt%-20wt% of La2O3, Y2O3, Pr6O11 and Nd2O3. The ternary catalyst provided by the invention is higher in carbon monoxide, hydrocarbon and oxynitride treatment ability, especially the activity of the Rh catalytically reduced oxynitride is improved.