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Elastomer composition
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A composition and elastomer technology, applied in transportation and packaging, other chemical processes, sealing devices, etc., can solve the problems of particle shedding, cracking, etc., and achieve low degassing effect
Inactive Publication Date: 2014-03-05
NOK CORP
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Also, if there is a large amount of filler material and the filler material has no affinity with the polymer, its particles will fall off, and if the particles enter the hard disk drive, it will inevitably lead to cracking
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Embodiment 1
[0040] Ethylene-propylene-diene copolymer rubber 100 parts by weight
[0041] (Mitsui Chemicals product EPT3072EP)
[0042] 60 parts by weight of polypropylene resin (Prime Polymer (Primer Polymer) product
[0046] Amorphous polystyrene block content 30% by weight)
[0047] Plasticizer 170 parts by weight
[0048] (INEOS (イネオス) product Durasyn168; from
[0049] C 10 polyalphaolefin, viscosity 7.8mm 2 / Second)
[0050] 2.4 parts by weight of cross-linking agent (Nippon Oils & Fats Products Park Mill D)
[0051] Cross-linking auxiliary agent (Nippon Kasei product TAIC M60; 1.2 parts by weight
[0052] Triallyl isocyanurate)
[0053] The above-mentioned components were mixed and extruded using a twin-screw extruder (Kobe Steel Hiper KTX46) at a set temperature of 210 to 180° C. and a rotation speed of 150 rpm...
Embodiment 2
[0064] In embodiment 1, use the same amount of Ineos (Ineos) product Durasyn 166 (derived from C 10 polyalphaolefin, viscosity 6.0mm 2 / sec) as a plasticizer.
Embodiment 3
[0066] In embodiment 1, use the same amount of INEOS product Durasyn 170 (derived from C 10 polyalphaolefin, viscosity 10.0mm 2 / sec) as a plasticizer.
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Abstract
Disclosed is an elastomer composition comprising (A) 100 parts by weight of an ethylene · propylene-based copolymer rubber or a polyolefin-based thermoplastic elastomer, preferably a partially dynamic-crosslinked polyolefin-based thermoplastic elastomer; (B) 10 to 200 parts by weight of a polypropylene-based resin; (C) 10 to 200 parts by weight of a styrene-based thermoplastic elastomer; and (D) 100 to 400 parts by weight of a C 10 -, C 12 -, or C 12 / C 14 -derived poly ±-olefin plasticizer having a viscosity (according to JIS K2283) of 5 to 20 mm 2 / s at 100°C. The elastomer composition has low outgassing characteristics, low hardness, and excellent sealing properties at high temperature, and that can be suitably used, for example, as a material for molding a packing material of a hard disk drive cover-integrated gasket.
Description
technical field [0001] The present invention relates to an elastomer composition. More specifically, the present invention relates to an elastomer composition suitable for use as a molding material or the like of a packaging material for a cover-integrated gasket for a hard disk drive. Background technique [0002] In recent years, along with miniaturization and high performance of electronic devices, components are required to be made smaller and thinner. If the components are to be made smaller, the assembly workability in the manufacturing process will be deteriorated, and from this point of view, the integration and compositing of various components are required. At the same time, improvement in performance of required characteristics such as outgassing characteristics and sealing properties is also required. [0003] Patent Document 1 proposes that in an electronic storage device, especially as a spacer for preventing the intrusion of water and dust and requiring low ...
Claims
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