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    • 1. 发明申请
    • Metod For The Continuous Production Of Thermoplastically-Processable Polyurethane Elastomers
    • 用于连续生产热塑性加工性聚氨酯弹性体的方法
    • US20080139776A1
    • 2008-06-12
    • US11815221
    • 2006-01-31
    • Gunter ScholzMarian MoursSven LawrenzHorst PapenfussChristoph BahrRudiger Krech
    • Gunter ScholzMarian MoursSven LawrenzHorst PapenfussChristoph BahrRudiger Krech
    • C08G18/00
    • C08G18/222B29C35/02B29C47/0004B29C47/0021B29C47/34B29C47/40B29C47/50B29C47/786B29C47/827B29C47/862B29K2021/00B29K2075/00B29K2105/0014C08G18/0895C08G18/664C08G18/6674
    • Process for continuous production of thermoplastically processable polyurethane elastomers with improved homogeneity, by metering a polyisocyanate (A), a proportion of from 1 to 80 equivalent %, based on the isocyanate group content of the polyisocyanate (A), of a compound (B) having an average of at least 1.8 and at most 3.0 hydrogen atoms having Zerewitinoff activity, with an average molar mass of from 450 g/mol to 5000 g/mol, a proportion of from 12 to 99 equivalent %, based on the isocyanate group content of the polyisocyanate (A), of a chain extender (C) having an average of at least 1.8 and at most 3.0 hydrogen atoms having Zerewitinoff activity per molecule, with an average molar mass of from 60 g/mol to 400 g/mol, from 0 to 30% by weight, based on the total amount of the polyurethane elastomer, of catalysts and further auxiliaries and additives (D), the molar NCO:OH ratio of polyisocyanate (A) to the entirety composed of the compound (B), of the chain extender (C), and of the further auxiliaries and additives (D) being from 0.9:1 to 1.2:1 into a self-cleaning twin-screw extruder which is operated at high shear rates, and then bringing the mixture from the self-cleaning twin-screw extruder into a further apparatus in order to complete the reaction, which comprises setting shear rates above 6000 s−1 and residence times in the range from 1 to 20 s in the self-cleaning twin-screw extruder.
    • 基于多异氰酸酯(A)的异氰酸酯基含量的化合物(B),通过计量多异氰酸酯(A),1至80当量%的比例,连续生产具有改进的均匀性的热塑性可加工聚氨酯弹性体的方法, 平均摩尔质量为450g / mol至5000g / mol,平均摩尔质量为12至99当量%,基于异氰酸酯基含量 的多异氰酸酯(A),平均摩尔质量为60g / mol至400g / mol的平均值至少为1.8且至多3.0个氢原子的扩链剂(C)具有每分子Zerewitinoff活性, 0至30重量%,基于聚氨酯弹性体的总量,催化剂和其它助剂和添加剂(D),多异氰酸酯(A)与由化合物(B)组成的整体的NCO:HOH摩尔比为 ,扩链剂(C)和f 进一步的助剂和添加剂(D)为0.9:1至1.2:1,进入以高剪切速率操作的自清洁双螺杆挤出机,然后将来自自清洁双螺杆挤出机的混合物进一步 装置,以完成反应,其包括在自清洁双螺杆挤出机中将剪切速率设定在6000s -1以上并且在1至20s范围内的停留时间。
    • 3. 发明授权
    • Writing instrument
    • 书写工具
    • US5286127A
    • 1994-02-15
    • US975358
    • 1992-11-16
    • Gunter Scholz
    • Gunter Scholz
    • B43K8/02B43K8/08B43K8/12
    • B43K8/02
    • A writing instrument has an elongated hollow barrel having a front end formed with a longitudinally extending tip passage centered on and defining an axis, an ink reservoir in the barrel, and a rigid synthetic-resin tip extending along the axis, formed with longitudinal capillaries, and having a front pointed end which projects axially forwardly from the barrel and a rear pointed end which is in the reservoir. This tip is centrally formed with a radially outwardly open groove having axially spaced front and rear flanks and is substantially symmetrical about a plane bisecting the groove. A plurality of radially inwardly projecting holding ribs formed in the passage radially engage the tip and each form a forwardly directed shoulder bearing axially forward on the front flank of the groove.
    • 在具有对称设计的书写工具(4)的书写工具中,所述书写工具(4)由具有纵向毛细管的刚性圆柱形塑料体组成,具有锥形磨尖的端部(5,6)并且插入到所述书写头保持器的前孔(3)中 如图2所示,书写尖端(4)的后端(6)连接到书写液体储存室(7),书写尖端(4)具有轴向中心的环形凹槽(8),纵向肋条 设置在笔尖保持器(2)的前孔(3)中的方式以正配合方式接合,这些肋仅在组装期间能够变形,而不是由于在书写尖端(4)处发生向内的压力 )在写作