47results about How to "Excellent flex fatigue resistance" patented technology

A trans-1, 4-structured butadiene-isoprene copolymer rubber and a preparation method thereof. A Ziegler-Natta catalytic system containing MgCl2 loaded titanium and an organic aluminium compound is used to catalyze butadiene and isoprene for copolymerization synthesis of the butadiene-isoprene copolymer with trans 1, 4-structure greater than 90%; and the copolymer rubber comprises, by molar fraction, 20-99.5% of an isoprene unit and 0.5-80% of a butadiene unit. One preparation method of the trans copolymer rubber is by maintaining a feeding ratio of butadiene to isoprene, and catalyzing butadiene and isoprene for copolymerization synthesis of trans copolymer rubber with gradient composition at 0-90 DEG C. A second preparation method of the trans copolymer rubber is by maintaining the concentration of butadiene in reaction materials, and catalyzing butadiene and isoprene for copolymerization synthesis of trans copolymer rubber with relatively uniform composition at 0-90 DEG C. The trans copolymer rubber has characteristics of low heat, good abrasion resistance and excellent flex and fatigue resistant performance, and is suitable rubber products for dynamic usage.

The invention discloses a rubber tire tread and a milling process thereof. The rubber tire tread comprises the following components in parts by weight: 70-110 parts of natural rubber, 0-15 parts of styrene-butadiene rubber, 5-20 parts of tread rubber powder, 1.5-2.5 parts of stearic acid, 1-2 parts of sulfur powder, 2-18 parts of white carbon black, 12-15 parts of carbon block, 2-30 parts of aromatic oil, 1-8 parts of zinc oxide, 4-7 parts of an anti-aging agent, 1-4 parts of pine tar, 1-4 parts of an accelerating agent, 0.2-1 part of an anti-reversion agent and 2-5 parts of a binding agent. A three-section milling process is adopted, and the milling process can improve the abrasive resistance, tear resistance and chunking and chipping resistance of the tire tread.

the present invention is preparation process of polyether-type polyurethane as shoe sole material. Polyether polyol with high activity and low unsaturation degree is synthesized with water as foaming agent and bimetal cyanide as catalyst; and isocyanate capped modified semi-prepolymer is prepared with small molecule modifier containing active hydrogen. The modified semi-prepolymer and the Polyether polyol are further produced into the porous polyurethane elastomer through mixing, casting, foaming and demolding. The material has high tensile strength, tearing strength, elongation and permanent deformation performance, and rather high low temperature embrtittlement and bending performance, and can meet the requirement as shoe material.

The invention relates to rubber composition for manufacturing a wrapping cloth V-belt compression layer and a preparation method of the rubber composition. The rubber composition is mainly prepared from components as follows: natural rubber, styrene butadiene rubber, eucommia rubber, a vulcanization activator, a lubricant, an antiaging agent, carbon black, white carbon black, pottery clay, calcium carbonate, a plasticizer, a tackifier, an accelerator and a vulcanizing agent. A natural rubber, styrene butadiene rubber and eucommia rubber compound system is adopted in the rubber composition, the flexural fatigue resistance and heat resistance of the rubber composition are improved, besides, carbon black and white carbon black are combined to serve as a reinforcing agent, dynamic heat dissipation is reduced while the support performance of rubber is guaranteed, and the fatigue life of the rubber is prolonged.

The invention relates to a method for preparing a dynamically vulcanized thermoplastic elastomer material, which is characterized in that the dynamically vulcanized thermoplastic elastomer material is made of the following row materials by the percentage in weight: 20 per cent -30 per cent of polypropylenes, 60 per cent -70 per cent of nitrile rubbers, 0.1 per cent -0.5 per cent of curing agents, 0.5 per cent -1 per cent of vulcanization auxiliaries, 0.1 per cent -1 per cent of antioxidants, 0.1 per cent -1 per cent of lubricant and 5 per cent -15 per cent of compatibilizers. The preparation method comprises the following steps: the raw materials are scaled and taken according to a weight proportion; all the materials are put into a high mixing machine to be mixed for 2-5 minutes; the materials are taken out; the mixed materials are put into a screw compressor for extruding granulations. The rotating speed of the screw compressor is 180-600r/m and temperature is 150-180 DEG C. The invention has the advantages that the polypropylene/nitrile rubber dynamically vulcanized thermoplastic elastomer material by adopting the novel compatibilizer cooperated with the advanced formulation design and equipment combination, can be used on the occasion where the oil resistance is required and is used for partially replacing the nitrile rubber.

The invention relates to a method for manufacturing truck tire rubber. The method comprises the following steps of plasticating, mixing, calendering, vulcanizing, molding and the other steps, wherein in the mixing process, the plasticated rubber is put into a roll gap and evenly wrapped on a front roller, after the rubber is removed, the roller distance is adjusted to be 1.5mm, the rubber is again wrapped on the front roller and a compounding agent is put in the sequence of natural plasticated rubber, an auxiliary material, zinc oxide, carbon black, No.30 engine oil and sulfur, and the auxiliary material can be one of a promoting agent, an anti-aging agent and stearic acid. The tire prepared from the rubber composition disclosed by the invention is environment-friendly and safe and has excellent flexibility resistance and fatigue resistance.

The invention relates to a method for quickly constructing a joint of an IW steel curtain mesh conveying tape. The method comprises the following steps: reserving a raw head on the top of a vulcanized tape, and compositely reinforcing the upper side and the lower side of the raw head with super glue canvas; dissolving the upper raw glue and the lower raw glue with solvent until the raw glue is peeled off and the steel curtain mesh is exposed when the tape head of the tap is adhered, and cutting the weave connecting wire of a steel wire and a steel wire rope, removing weft steel cord, and cutting steel wire ropes into step fingers one by one; laying a lower covering layer raw glue plate and an adhesive layer core raw glue plate under the steel wire ropes in sequence, performing step finger abut on the steel wire ropes at two ends of the tape; filling adhesive core glue in clearance of two adjacent abutted steel wires and clearance between ends; and laying an adhesive layer core glue raw glue plate, an anti-tearing steel core mesh raw glue fabric and an upper covering layer raw glue plate above the steel wires; and vulcanizing after finishing. The method has the advantages of simple jointing method, time and manpower conservation, quick adhering connection speed, no seam, high jointing strength and good flex fatigue resistance.

The invention provides a rubber composition used for tire side walls. The rubber composition comprises the following components in parts by weight: 100 parts of base rubber, 30 to 70 parts of a lightcolor filler, 0 to 10 parts of a silane coupling agent, 2 to 15 parts of a coloring agent, 0.5 to 8 parts of paraffin, 3 to 8 parts of an activating agent, 1 to 5 parts of an accelerant and 0.5 to 3 parts of a vulcanizing agent; the 100 parts of base rubber comprises 30 to 60 parts of natural rubber and butadiene rubber and 40 to 70 parts of halogenated butyl rubber and EPDM rubber in parts by weight; and the weight of natural rubber is greater than or equal to 50% of the total quantity of natural rubber and butadiene rubber. Compared with the prior art, no chemical anti-aging agent is added into the rubber composition provided by the invention, just through balance selectivity of the base rubber and the light color filler, the obtained colored rubber composition has excellent ozone agingresistance, flexing fatigue resistance and processability, and the appearance is colorful and the color is unlikely to change.

The invention relates to a preparation method of trans-1,4-polyisoprene (TPI). A supported titanium catalyst is used to catalyze polyisoprene polymerization, and a solution-slurry method is adopted tosynthesize powdery or block shaped trans-1,4-polyisoprene (TPI). The catalysis efficiency and monomer conversion rate are high, and the method has reached the industrialization standards. The synthesized TPI has the advantages of high hardness and excellent dynamic properties and can be easily crystallized at a room temperature. TPI has a wide application range. In a zero crosslinking phase, TPIis a thermoplastic material and is used as a medical material; in a low crosslinking phase, TPI is a thermo-elastic material and is used as a shape memory material; and when the crosslinking density exceeds a certain value, TPI becomes a rubber type high elasticity material. At present, TPI has great advantages in fields of green tires and medium-high temperature damping materials, and has a greatapplication value.

The invention discloses a high-elasticity and high-durability regenerated rubber seal ring. The high-elasticity and high-durability regenerated rubber seal ring is prepared from raw materials in parts by weight as follows: 60-80 parts of regenerated rubber, 5-10 parts of ethylene-propylene-diene monomer rubber, 10-25 parts of diatomite, 5-10 parts of carbon nanofibers, 4-6 parts of rosin, 2-4 parts of butyl acrylate, 0.5-1 part of 2,6-di-tert-butyl-4-methylphenol, 1-2 parts of sulfur, 0.1-0.2 parts of potassium persulfate, 0.1-0.2 parts of sodium dodecyl sulfate, 1-2 parts of diacetyl tartaric acid ester of mono(di)glycerides, 1-2 parts of zinc stearate, 2-4 parts of palm oil and 5-10 parts of a compound aid. The regenerated rubber seal ring has an excellent mechanical property and use performance, good sealing performance and high overall performance, has high elasticity and durability, excellent flexing fatigue resistance and good elastic resilience and is long in service life and applicable to various mechanical devices.

The invention relates to the technical field of rubber materials, and discloses a butadiene rubber dust cover. The butadiene rubber dust cover comprises the following components: 90-110 parts of butadiene rubber, 30-50 parts of cellulose acetate resin, 6-8 parts of epoxy resin, 15-20 parts of carbon black, 15-20 parts of nano kaolin, 15-20 parts of modified calcium sulfate whiskers, 5-10 parts ofa titanate coupling agent, 1-3 parts of a vulcanizing agent, 2-10 parts of a vulcanizing aid, 5-7 parts of nano zinc oxide, 2-4 parts of stearic acid, 6-8 parts of paraffin and 1-3 parts of an anti-aging agent. The invention also discloses a preparation method thereof. According to the butadiene rubber dust cover prepared by the invention, butadiene rubber is used as a raw material; compared withthe prior art, the dust cover has the advantages that other rubber materials do not need to be doped, the processability of the dust cover is improved through vulcanization of tert-butyl peroxybenzoate, sulfur and phenolic resin under the action of cellulose acetate resin, epoxy resin, carbon black, nano kaolin and modified calcium sulfate whiskers, and the obtained dust cover is good in mechanical property and high in tearing strength.

The invention relates to the technical field of industrial machines, in particular to a multifunctional mechanical arm. The multifunctional mechanical arm comprises a mechanical arm body and further comprises a plurality of work heads and a coupling device matched with the work heads. The mechanical arm body outputs power to the work heads through the coupling device, and the work heads are telescopically mounted on a mounting rack. The coupling device comprises a fixed barrel arranged at one end of the mechanical arm body, an air pump arranged in the fixed barrel and a coupler with one end connected to the air pump, and the other end of the coupler is matched with the work heads. According to the technical scheme, the multifunctional mechanical arm has the following beneficial effects that the structure is simple, the technology is reasonable, and use is convenient; the mechanical arm body is connected with the work heads with different functions through displacement of the coupler, and multiple functions of the mechanical arm are achieved; and an elastic element of the coupler is long in service life, excellent weather fastness, bending fatigue resistance, fire resistance and corrosion resistance are achieved, and therefore use is facilitated, and the service life of the mechanical arm is prolonged.