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    • 2. 发明授权
    • Rod sealing system
    • 杆密封系统
    • US08056903B2
    • 2011-11-15
    • US12086211
    • 2006-12-05
    • Noriyuki MatsuiManabu HiranoYoshihiro KuzumakiKuniyoshi SaitoHayato Takada
    • Noriyuki MatsuiManabu HiranoYoshihiro KuzumakiKuniyoshi SaitoHayato Takada
    • F16J15/16
    • C09K3/1021C08G18/10C08G18/44C08G2140/00C08G18/3206
    • In a rod sealing system, which comprises a buffer ring, a rod seal, and a dust seal, provided successively in this order from a fluid hydraulic side toward the outside in an annular clearance between two members in reciprocating motion, the buffer ring is made up of a thermoplastic polyurethane molding product obtained by subjecting a thermoplastic polyurethane molding product prepared by reaction of (A) a high molecular weight polycarbonatediol having a number average molecular weight Mn of 500-6,000, (B) an aromatic diisocyanate, and (C) a low molecular weight diol as a chain elongation agent in an NCO/OH ratio of 0.95-1.20, to heat treatment under conditions that a glass transition point (Tg) of hard phases becomes 170° C. or higher, preferably 170-230° C., and an endothermic peak area (ΔH) at Tg becomes 5 J/g or more, by differential scanning calorimetry. The buffer ring made up of the thermoplastic polyurethane molding product has a distinguished heat resistance capable of withstanding the service environmental temperature, particularly maximum 120° C., compression set characteristics, follow-up to eccentricity, etc.
    • 在包括缓冲环,杆密封和防尘密封的杆密封系统中,以往复运动中的两个构件之间的环形间隙从液压侧朝向外部依次提供缓冲环,制成缓冲环 (A)数均分子量Mn为500〜6000的高分子量聚碳酸酯二醇,(B)芳香族二异氰酸酯和(C)的反应制得的热塑性聚氨酯成型体, 作为NCO / OH比为0.95-1.20的链延长剂的低分子量二醇,在硬相的玻璃化转变温度(Tg)为170℃以上,优选为170〜230℃的条件下进行热处理 通过差示扫描量热法测定Tg的吸热峰面积(&Dgr; H)为5J / g以上。 由热塑性聚氨酯成型制品制成的缓冲环具有耐受使用环境温度,特别是最大120℃,压缩永久变形特性,偏心率等特性的耐热性。
    • 5. 发明申请
    • Rod Sealing System
    • 杆密封系统
    • US20090166984A1
    • 2009-07-02
    • US12086211
    • 2006-12-05
    • Noriyuki MatsuiManabu HiranoYoshihiro KuzumakiKuniyoshi SaitoHayato Takada
    • Noriyuki MatsuiManabu HiranoYoshihiro KuzumakiKuniyoshi SaitoHayato Takada
    • F16J15/32
    • C09K3/1021C08G18/10C08G18/44C08G2140/00C08G18/3206
    • In a rod sealing system, which comprises a buffer ring, a rod seal, and a dust seal, provided successively in this order from a fluid hydraulic side toward the outside in an annular clearance between two members in reciprocating motion, the buffer ring is made up of a thermoplastic polyurethane molding product obtained by subjecting a thermoplastic polyurethane molding product prepared by reaction of (A) a high molecular weight polycarbonatediol having a number average molecular weight Mn of 500-6,000, (B) an aromatic diisocyanate, and (C) a low molecular weight diol as a chain elongation agent in an NCO/OH ratio of 0.95-1.20, to heat treatment under conditions that a glass transition point (Tg) of hard phases becomes 170° C. or higher, preferably 170-230° C., and an endothermic peak area (ΔH) at Tg becomes 5 J/g or more, by differential scanning calorimetry. The buffer ring made up of the thermoplastic polyurethane molding product has a distinguished heat resistance capable of withstanding the service environmental temperature, particularly maximum 120° C., compression set characteristics, follow-up to eccentricity, etc.
    • 在包括缓冲环,杆密封和防尘密封的杆密封系统中,以往复运动中的两个构件之间的环形间隙从液压侧朝向外部依次提供缓冲环,制成缓冲环 (A)数均分子量Mn为500〜6000的高分子量聚碳酸酯二醇,(B)芳香族二异氰酸酯和(C)的反应制得的热塑性聚氨酯成型体, 作为NCO / OH比为0.95-1.20的链延长剂的低分子量二醇,在硬相的玻璃化转变温度(Tg)为170℃以上,优选为170〜230℃的条件下进行热处理 通过差示扫描量热法测定Tg的吸热峰面积(DeltaH)为5J / g以上。 由热塑性聚氨酯成型制品制成的缓冲环具有耐受使用环境温度,特别是最高120℃,压缩永久变形特性,偏心率等特性的耐热性。