236results about How to "Improve heat aging performance" patented technology

The invention relates to ultraviolet-light deeply cross-linked halogen-free flame-retardant polyolefin cable material and a method for preparing an ultraviolet-light deeply cross-linked halogen-free flame-retardant polyolefin cable insulating or sheathing layer from the same. The method comprises the following steps: adding a metal hydroxide flame retardant, a cationic photoinitiator, a free radical photoinitiator, a multi-functional cross-linking agent, a compound antioxidant, a flame-retardant synergist, a synergistic smoke suppressant and a processing aid to polyethylene or grafted and modified polyethylene and / or ethylene vinyl acetate or grafted and modified copolymer thereof which are used as base materials, compounding, mixing the materials uniformly according to the proportion, granulating, extruding to prepare the ultraviolet-light cross-linked halogen-free flame-retardant polyolefin cable insulating or sheathing layer, and immediately irradiating with a specific ultraviolet-light source to obtain the deeply cross-linked halogen-free flame-retardant polyolefin cable insulating or sheathing layer. The cross-linking equipment used for preparing the novel material by using anovel technology has low investment, and the process is simple and environmental friendly, saves energy, ensures high production efficiency and low cost and good quality of product and can be widely used for producing high-performance special wire and cable products and the like.

A composite type composed of polyurethane surface layer and main body of rubber is prepared through treating the surface of main body, synthesizing and modifying the prepolymer of polyurethane, and casting the surface layer. Its advantages are high elasticity and antiwear nature, and low rolling resistance.

The invention provides a warm-water-free silane crosslinking polyolefines composition, comprising base material A and catalyst parent material B, the weight ratio thereof being :100:4-6, wherein the base material A is composed of (by weight parts): polyolefine rsin 100 parts, first antioxidant 0.2-0.3 parts, silicane 2.0-4.0 parts, initiator 0.1-1.0 parts, lubricant 1.0-3.0 parts, fatty acid 0.1-0.5 parts, the catalyst parent material B is composed of (by weight parts): polyolefine resin 100 parts, second antioxidant 1.0-5.0 parts, catalyst 2.0-5.0 parts, ester compound 2.0-5.0 parts, metal oxide 2.0-5.0 parts. The preparation method is uniformly mixing the above material. The silane crosslinking polyolefines composition can be linkable under natural conditions not through boiling or vapor bathing, with property corresponding the operational requirement, especially silane crosslinking polyolefines cable material .

The invention discloses a heat-resistant and wear-resistant composite material and a preparation method and an application thereof and belongs to the field of high polymer wear-resistant materials. The heat-resistant and wear-resistant composite material is prepared from the following raw materials in parts by weight: 100 parts of thermoplastic resin, 10-40 parts of carbon fiber, 40-100 parts of a wear-resistant material, 0.1-1.0 part of a heat conduction material, 0.5-2.0 parts of a coupling agent, 0.2-1.0 part of an antioxidant and 0.5-5.0 parts of a lubricant. The heat-resistant and wear-resistant composite material has the characteristics of light specific gravity and high strength, the properties, such as the wear resistance, the corrosion resistance and the ageing resistance, are improved, and the heat-resistant and wear-resistant composite material is a composite material with excellent overall performance and can effectively replace metal alloy and ceramic materials.

The invention belongs to the field of optical semiconductor device packaging materials, and discloses inorganic / organic hybridization nanometer composite resin and light-emitting diode (LED) packaging materials prepared by the same. The inorganic / organic hybridization nanometer composite resin is prepared by epoxy group phenyl group oligomerization siloxane and inorganic nanometer materials in a composite and hybridization mode. The LED packaging materials are prepared by raw materials of the inorganic / organic hybridization nanometer composite resin. The preparation steps comprise that 100 parts by weight of the inorganic / organic hybridization nanometer composite resin, 0.1-40 parts by weight of curing agents, 0-1.0 part by weight of curing accelerator, 0-2.0 parts by weight of light scattering agents and 0-2.0 parts of antioxidants are mixed uniformly, procured for 1-3 hours at the temperature of 60-90 DEG C, then cured for 2-4 hours at the temperature of 120-140 DEG C, and finally cured for 2-6 hours at the temperature of 160-180 DEG C, and the LED packaging materials are obtained.

The invention discloses an aging-resistant PC-PBT plastic alloy, which is composed of the following components in weight part: 100 parts of PC, 20-40 parts of PBT, 4-8 parts of compatibilizer and 0.5-1.5 parts of age resister. The PC-PBT plastic alloy disclosed by the invention has the advantages of good thermal tolerance, good stress cracking resistance, excellent abrasive resistance, excellent chemical corrosive resistance, high low-temperature impact strength, easiness in machining and good coating property, and is mainly applied to bumpers, chassis and panels of superior quality cars, fenders of motorcycles and the like. The aging-resistant PC-PBT plastic alloy also has excellent thermal aging property, thereby being suitable for use in the extremely high temperature environment.

This invention discloses an automobile inner decoration material of polyolefin elastomer. The material comprises: ternary ethylene-propylene rubber 30-60 wt.%, polyethylene 10-35 wt.%, polypropylene 6-35 wt.%, silane coupling agent 3-7 wt.%, organic Sn 0.5-3.5 wt.%, perfluorodibenylethane 5-8 wt.%, Ti2O3 1.5-3 wt.%, antioxidant-1010 0.3-0.5 wt.%, and zinc stearate 0.3-0.8 wt.%. The material can be produced by traditional ABS / PVC resin production process and apparatus. The material has such advantages as good physical properties, light weight, high elasticity, and good permanent deformation performance, high scrape resistance, and high heat and cold resistance, and can be used for automobile inner decoration.

The invention discloses a preparation method of a super-soft cable and an external coating material of the super-soft cable. The super-soft cable comprises a conductive core stranded by 7-61 groups of folded yarns and the external coating material of the conductive core, wherein each of the folded yarns is stranded by a plurality of tinned copper wires; the conductive core is coated with super-soft high-strength silicon rubber for insulation; the high-strength silicon rubber comprises the following components: methyl vinyl silicone rubber, precipitated white carbon, iron sesquioxide, chlorinated paraffin, magnesium hydrate, an anti-aging agent N-isopropyl benzene-N'-phenyl p-phenylenediamine, hydroxyl silicone oil, silicone oil containing hydrogen, dioctyl phthalate, a surfactant gamma-thiopropyl triethoxy silane, a silane coupling agent and a bis-2, 5 vulcanizing agent. The super-soft cable has the characteristics of bending resistance, corrosion resistance, wear resistance and the like, is relatively high in using temperature and relatively long in service life, and can be used for various types of equipment which is small in cable laying space and great in number of round trips.

The invention discloses a construction process of a colored pavement epoxy non-slip wearing layer structure. The construction process comprises the following steps: (1) pavement patching; (2) pavement shot blasting; (3) epoxy resin stirring; (4) paving of epoxy resin; (5) spreading of aggregates; (6) curing and recovering of the aggregates; and (7) opening of transit. Compared with the prior art, the construction process has the advantages that the wearing layer structure is simple in process, easy to operate, good in non-slip performance, high in bonding strength, small in thickness, convenient in construction, rapid in curing and high in material water resistance; running noise of vehicles is lowered; driving conditions are improved; the wearing layer structure is excellent in corrosion resistance, high in flame retardant property, high in ductility, uniform in expansion, high in low-temperature resistance, low in low-temperature brittleness, excellent in thermal ageing resistance, high in high-temperature stability and high in wear resistance, the surface aggregate is high in wear resistance, a conventional road elevation and the conventional clear height of a bridge are not changed, existing various structural and non-structural pavement diseases can be repaired at a time, the maintenance cost is saved, and the service life of a pavement is greatly prolonged.

A vibration-damping rubber composition which comprises (A) natural rubber (NR) as the main component and contains (B) zinc monomethacrylate and (C) a sulfur-containing vulcanizing agent, wherein the content of the component (B) is set within the range of 0.1 to 10 parts by weight with respect to 100 parts by weight of the component (A). The vibration-damping rubber composition exhibits excellent vibration-damping properties and has excellent heat aging resistance over a long period.