摘要:
A fin is provided, wherein a Cu-Zn diffused alloy layer with a Zn content of not less than 1 wt % is formed on at least a portion of the surface of Cu-based substrate for a fin. For the formation of such a Cu-Zn diffused alloy layer, Zn is allowed to diffuse thermally after covered the surface of Cu-based substrate with Zn or Zn alloy, and a rolling processing is carried out after the thermal diffusion to finish to a desired size. The Zn concentration of the fin decreases continuously from the outside surface of the Cu-Zn diffused layer to the interface between that layer and the Cu-based fin substrate.
摘要:
A fine particulate crosslinked amorphous copolymer comprising an amorphous copolymer having a constituent unit originating at least from ethylene and .alpha.-olefin, and having an average particle diameter of 0.2 to 50 .mu.m and a hot toluene insolubles content of 15% by weight or more.
摘要:
Disclosed is a laminate excellent in the surface gloss and scratch resistance, which comprises a thermoplastic elastomer layer composed mainly of a composition comprising a polyolefin and an olefinic copolymer elastomer, at least one of which is partially crosslinked, and a layer of a partially neutralized ionomer resin or 1-olefin/(meth)acrylic acid copolymer resin having a free carboxyl group, both the layers being tightly bonded to each other.
摘要:
A thermoplastic elastomer composition composed of a partially crosslinked product of a blend consisting mainly of (a) 80 to 10 parts by weight of a peroxide-crosslinkable olefinic copolymer rubber, (b) 10 to 80 parts by weight of a peroxide-crosslinkable polyolefin resin having specific properties and (c) 50 to 10 parts by weight of a peroxide-decomposable polyolefin resin, the total amount of (a)+(b)+(c) being 100 parts by weight, the crosslinked product is obtained by dynamically heat-treating said blend in the presence of (d) an organic peroxide. The thermoplastic elastomer has excellent film formability, and is useful as a waterproof sheet.
摘要:
Steel strips are electroplated with a Zn-Fe base alloy containing 10 to 30% by weight of iron in a chloride bath which contains zinc and ferrous chlorides to give a total concentration of zinc and ferrous ions of from 1.0 mol/l to the solubility limit with a weight ratio of Fe.sup.2+ /Zn.sup.2+ between 0.10 and 0.35, and chloride ions in a total concentration of at least 6.0 mol/l under electrolytic conditions: pH 1.0-6.0, current density 80-200 A/dm.sup.2, and relative flow velocity 30-200 m/min. The bath may further contain a polycarboxylic acid such as citric acid and a Zn-Fe-P alloy plating may be deposited when the bath further contains hypophosphorous acid.
摘要:
Dynamically partially cured composition comprising a peroxide-curable olefin copolymer rubber (such as EDPM) and a peroxide-decomposing olefin plastic (such as PE and PP) is improved by effecting the dynamic heat-treatment with addition of a peroxide-non-curable hydrocarbon rubber (such as PIB) and/or a mineral oil softener (process oil). The dynamic heat-treatment is preferably carried out not only in the presence of an organic peroxide but also in the presence of divinyl benzene. The elastomeric composition is thermoplastic and, with or without further blending with an olefin plastic, is processable by techniques conventionally used for thermoplastic resins. This elastomer composition and blends of the elastomer composition and olefin plastic can be used for producing foamed product in combination with decomposition type foaming agent (such as azodicarbonamide).
摘要:
Anti-tumor low-toxicity coriolin derivatives represented by the following general formula: ##STR1## wherein one of X and Y is ##STR2## and the other is >C OH, >C.dbd.O or ##STR3##
摘要翻译:由下列通式表示的抗肿瘤低毒型科可因衍生物:其中X和Y之一为“IMAGE”,另一个为C OH,> C = O或“IMAGE”
摘要:
This invention is concerned with a tire pressure drop audible warning-giving apparatus, which is provided in an air chamber defined by a pneumatic tire and a wheel rim assembled with the pneumatic tire so as to strike the wheel rim for emitting an alarming sound when a tire inner pressure is dropped in the air chamber below an allowable limit. The apparatus comprises in combination: a securing member secured to the wheel rim; a blow hammer provided spacedly from the securing member in the direction perpendicular to the radial direction of the wheel rim; and a connecting member made of a resilient material and having one end connected with the radially outer end of the securing member and the other end connected with the blow hammer; wherein the blow hammer has at its radially outer end a protrusion extending radially outwardly from the radially outer end of the connecting member, and at its radially inner end a blow portion.
摘要:
An oligonucleotide derivative comprises repeating structural units represented by the following general formula (wherein B represents adenine, guanine, cytosine, or uracil; X represents a sulfur atom or an oxygen atom; n represents an integer of 6 to 60; and B and X are independently represented in each of the repeating structural units), wherein X is a sulfur atom in at least one of the repeating structural units represented by the general formula:
摘要:
A lead material for an electronic part having no adverse effect on the environment, having excellent solderability, desirable welding strength during welding and a low degree of nonuniform thickness of the plated layer during reflow processing. The lead material has a first plated layer and a second plated layer, both of which do not contain Pb, laminated on the surface of a conductive substrate in such order. The melting point of the second plated layer is lower than that of the first plated layer. The first and second plated layers are made of a Sn substance and a Sn alloy, respectively or vice versa.