976results about How to "High heat resistance" patented technology

A lubricant for a magnetic disk that is excellent in heat resistance and is suitably used in a magnetic disk to be mounted on a magnetic recording device of a thermally assisted magnetic recording system and a magnetic disk provided with a lubricant layer containing this lubricant. The lubricant for a magnetic disk contains a compound where perfluoropolyether groups each having a perfluoropolyether main chain in its structure and a phosphazene ring at an end are linked to each other through a linking group. The linking group is an aliphatic group or a phosphazene ring. In a magnetic disk having at least a magnetic recording layer, a protective layer, and a lubricant layer on a substrate, the lubricant layer contains the lubricant for a magnetic disk.

Disclosed is a specific adhesive polyethylene composition comprising [1] a modified ethylene/alpha-olefin copolymer resin or elastomer obtained by modifying a specific ethylene/alpha-olefin copolymer resin or elastomer, each of which comprises ethylene and an alpha-olefin of 3 to 20 carbon atoms, with an unsaturated carboxylic acid or anhydride, ester, amide, imide or metallic salt derivative of a unsaturated carboxylic acid thereof, [2] an unmodified ethylene/alpha-olefin copolymer resin and/or an unmodified ethylene/alpha-olefin copolymer elastomer and [3] a tackifier. Also disclosed is a multi-layer laminated film of 3 or more layers in which a layer of the above composition is interposed between an ethylene polymer layer and either a polyamide resin layer, an ethylene/vinyl alcohol copolymer layer or a layer of a mixture of polyamide resin and ethylene/vinyl alcohol copolymer. The adhesive polyethylene composition shows excellent adhesion strength to ethylene polymers, polyamide resins and ethylene/vinyl alcohol copolymers, high heat-sealing strength and heat resistance. The multi-layer laminated film shows excellent strength, heat resistance and gas barrier properties, and besides this film has heat shrinkability, so that the film is suitably used as a shrink film.

The invention discloses high-temperature resisting methyl vinyl silicone rubber as well as a prescription and a preparation process thereof. The high-temperature resisting modified silicon rubber material which has more than 300 DEG C of application temperature and can not crack when according with requirements of 550 DEG C, 4mm distance and high-temperature radiation for more than 12 minutes is prepared by adopting the following steps of: adding cerium oxide and polymide into the prescription in which methyl vinyl silicon crude rubber is taken as a rubber raw material to improve the heat-resisting temperature, adding hydroxy silicone oil, dimethyl silicon oil and a silane coupling agent to improve the oil-resisting performance, adding precipitation method white carbon black and gas-phase method white carbon black to improve the tearing-resistance strength, adding quartz power and kieselguhr to improve the tensile strength and matching technical schemes of the preparation process. The high-temperature resisting methyl vinyl silicone rubber overcomes the problems and the defects of poor high-temperature and aging resistance performance and short service life of the common silicone rubber in the prior art, satisfies the special requirements for the heat-resisting performance, the electrical strength and the mechanical strength of automotive rubber products, and ensures that the silicone rubber products achieve the aims of improving the high-temperature resistance performance and prolonging the service life.

The invention provides an aramid thin sheet material comprising two components of aramid staple fibers and fibrillated aramid, or said two components and aramid fibrid, in particular, characterized by satisfying both of the following expressions (1) and (2):

[internal resistance] (μm)≦250 (μm)  expression (1)

[Oken-type gas permeability] (sec/100 cm³)≧0.5 (sec/100 cm³)  expression (2)

wherein the [internal resistance] is a resistance value calculated by the following expression (3): $\begin{array}{cc}\frac{\begin{array}{c}[\mathrm{internal}\mathrm{resistance}]\left(\mu m\right)=\\ \left[\begin{array}{c}\mathrm{electrical}\mathrm{conductivity}\\ \mathrm{of}\mathrm{electrolyic}\mathrm{solution}\end{array}\right]\end{array}}{\left[\begin{array}{c}\begin{array}{c}\mathrm{electrical}\mathrm{conductivity}\\ \mathrm{of}\mathrm{electrolytic}\end{array}\\ \mathrm{solution}\text{-}\mathrm{injected}\\ \mathrm{thin}\mathrm{sheet}\mathrm{material}\end{array}\right]}\times \left[\begin{array}{c}\mathrm{thickness}\\ \mathrm{of}\mathrm{the}\\ \mathrm{thinsheet}\\ \mathrm{material}\end{array}\right]\left(\mu m\right).& \mathrm{expression}\left(3\right)\end{array}$

A cyanate ester compound represented by the formula (1),

• • wherein Ar₂ represents a phenylene group, a naphthylene group or a biphenylene group, Ar₁ represents a naphthylene group or a biphenylene group when Ar₂ is a phenylene group, or Ar₁ represents a phenylene group, a naphthylene group or a biphenylene group when Ar₂ is a naphthylene group or a biphenylene group, R_x represents all substituents of Ar₁ each R_x is the same or different and represents hydrogen, an alkyl group or an aryl group, R_y represents all substituents of Ar₂, each R_y is the same or different and represents hydrogen, an alkyl group or an aryl group, and n is an integer of 1 to 50.

A small water-cooling type electronic component cooling apparatus is provided. The electronic component cooling apparatus comprises a so-called water-cooling heat sink 3 , a radiator 7 cooled by an electric fan 5 , first and second coolant paths 9, 11 for circulating a coolant between the heat sink 3 and the radiator 7 , and an electric pump 13 to supply a moving energy to the coolant. The electric pump 13 is arranged at a position facing the heat-radiating portion of the radiator 7.

The invention provides an electroplating PC/ABS (polycarbonate/acrylonitrile-butadiene-styrene) alloy material and a preparation method thereof. The electroplating PC/ABS alloy material comprises the following components in parts by weight: 30-70 parts of PC, 40-60 parts of ABS, 5-30 parts of styrene-acrylonitrile copolymer, 5-30 parts of butadiene graft rubber, 1-3 parts of compatilizer, 1-10 parts of heat-resistance modifier and 0.5-1 part of processing assistant. The alloy material provided by the invention has the advantages of favorable electroplating properties, excellent mechanical properties and favorable heat resistance, and can be used for designing automobile internal and external ornaments, including heat dissipation grids, door grips, vehicle logos, instrument panel decorating strips and the like.

The invention discloses a fungal alpha-amylase-containing beer complex enzyme and a preparation method thereof, belonging to the field of enzyme preparation processing. The high-activity fungal alpha-amylase and other food grade enzyme preparations, plant extracts, antioxidants, protective agents, activating agents and the like can be scientifically compounded by taking concentrated maltase and concentrated malt juice powder as main raw materials; the prepared beer complex enzyme is complete in proteases, high in enzyme activity, difficult to deactivate, mellow in malt aroma, and capable of providing abundant nitrogen source for malt juice, wherein the activity of fungal alpha-amylase in fermenting liquor during the preparation of fungal alpha-amylase is 17000-21000 U/mL. The complex enzyme can be stored for 12 months under the conditions of 0DEG C and 40DEG C, the single enzyme activity loss in the complex enzyme are respectively 0.50% and 0.72%, the enzyme deactivation caused by environment change, and inappropriate operation methods during packaging, storage, transportation, use and the like can be effectively prevented, especially the enzyme deactivation caused by high temperature can be prevented.

There is disclosed A resist underlayer film composition, the resist underlayer film composition contains a truxene compound having a substituted or an unsubstituted naphthol group as shown by the following general formula (1). There can be provided a resist underlayer film composition to form a resist underlayer film being capable of reducing reflectance and having high etching resistance, heat resistance.

To provide a photosensitive resin composition in which a hardened film obtained from the photosensitive resin composition has properties comparable to those of a film hardened at a high temperature, a method for manufacturing a patterned hardened film using the photosensitive resin composition, and an electronic part. The photosensitive resin composition includes (a) a polybenzoxazole precursor having a repeating unit represented by a general formula (I):

wherein U and V represent a divalent organic group, and at least one of U and V is a group containing an aliphatic chain structure having 1 to 30 carbon atoms; (b) a photosensitizer; (c) a solvent; and (d) a crosslinking agent capable of causing crosslinking or polymerization by heating.

An axial gap-type permanent magnetic rotating machine comprises a rotor comprising a rotating shaft having an axis of rotation, a rotor yoke of disc shape radially extending from the shaft, and a plurality of permanent magnet segments circumferentially arranged on a surface of the rotor yoke such that each permanent magnet segment may have a magnetization direction parallel to the axis of rotation, and a stator having a plurality of circumferentially arranged coils and disposed to define an axial gap with the rotor. In the rotor, each permanent magnet segment is an assembly of two or more divided permanent magnet pieces, and the coercive force near the surface of the magnet piece is higher than that in the interior of the magnet piece.

The invention belongs to the high molecular synthetic material field. The invention relates the double-end phthalonitrile, resin, condensate, which are made by phthalonitrile, and preparing method. The invention uses 4-nitro-o-phthalonitrile and dihydric phenol as reaction integral to get double-end phthalonitrile. The double-end phthalonitrile and diamine are used to react in aromatic amine solution at 140-200Deg.C to get phthalonitrile resin which possesses phthalocyanine ring structure. The resin is cured at 220-280Deg.C, then carried out heat treatment at 320-370Deg.C to get phthalocyanine condensate which possesses high heat stability. The invention has the advantages of good heat stability and fire-retardancy.

The invention discloses a halogen-free flame retardant reinforced polyamide composition, which has the advantages of excellent flame retardance, toughness and flowability, less gas generated in the processing process, excellent thermal stability and color stability in the reflow soldering process needed by surface installation, and is particularly suitable for molding electronic connectors and the like. The polyamide composition comprises the following components in percentage by weight: (1) 35 to 70 percent of semi-aromatic polyamide resin, (2) 10 to 35 percent of fire retardant, (3) 15 to 50 percent of inorganic reinforcing filler, (4) 0.1 to 5 percent of synergetic flame retardant, and (5) 0.03 to 0.5 percent of molecular sieve.

The invention discloses a feed compound enzyme-containing dedicated enzyme for growing pigs and a preparation method of the feed compound enzyme-containing dedicated enzyme, and belongs to the technical field of preparation of enzyme preparations. The dedicated enzyme for the growing pigs is prepared by scientifically compounding aspergillus niger cultures, acidic xylanase, phytase, beta-dextranase, cellulase, amylase, acid proteinase, Chinese herb extracts, a protective agent and an activating agent, wherein the aspergillus niger cells in the aspergillus niger cultures can inhibit the growth of pathogenic escherichia coli, inhibit the growth and breeding of aspergillus flavus, disintegrate the aspergillus flavus, promote the growth of animals, adjust gastrointestinal tract flora to be balanced, and enhance whole immunity during the processes of growth and fermentation, in addition, the fermentation liquid crude enzyme liquid of the aspergillus niger cultures contains different enzyme activity such as protease activity, mannase activity, alpha-galactase activity and pectinase activity, and the dedicated enzyme is specially suitable for being added in the feed for the growing pigs.