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    • 53. 发明授权
    • Process for producing improved random propylene copolymers
    • 制备改进的无规丙烯共聚物的方法
    • US6013742A
    • 2000-01-11
    • US969278
    • 1997-11-13
    • Stephan HufferMeinolf KerstingFranz LanghauserRainer Alexander WernerPatrik MullerJurgen Kerth
    • Stephan HufferMeinolf KerstingFranz LanghauserRainer Alexander WernerPatrik MullerJurgen Kerth
    • C08F4/658C08F4/02C08F4/64C08F4/654C08F210/06C08F210/16D01F6/06C08F4/18
    • C08F210/16C08F210/06
    • A process for preparing random propylene copolymers containing copolymerized C.sub.2 -C.sub.10 -alk-1-enes by polymerization of propylene and C.sub.2 -C.sub.10 -alk-1-enes in the presence of a Ziegler-Natta catalyst system comprising a titanium-containing solid component a) comprising a compound of magnesium, a halogen, silica gel as support and a carboxylic ester as electron donor compound, and also, as cocatalysts, an aluminum compound b) and a further electron donor compound c), where propylene and the C.sub.2 -C.sub.10 -alk-1-enes are polymerized with one another at from 50 to 100.degree. C. at pressures in the range from 15 to 40 bar and mean residence times of from 0.5 to 5 hours and the support used in the titanium-containing solid component is a silica gel which has a mean particle diameter of from 5 to 200 .mu.m, a mean particle diameter of the primary particles of from 1 to 10 .mu.m and voids or channels having a mean diameter of from 1 to 10 .mu.m, which voids or channels have a macroscopic proportion by volume based on the total particle in the range from 5 to 20%.
    • 在含有含钛固体组分a的齐格勒 - 纳塔催化剂体系存在下,通过丙烯和C 2 -C 10 - 烷-1-烯的聚合制备含共聚的C 2 -C 10 - 烷-1-烯的无规丙烯共聚物的方法 ),其包含镁,卤素,硅胶作为载体的化合物和作为电子给体化合物的羧酸酯,以及作为助催化剂的铝化合物b)和另外的电子给体化合物c),其中丙烯和C 2 -C 10 α-烷-1-烯在50至100℃下以15至40巴的压力和0.5至5小时的平均停留时间彼此聚合,并且在含钛固体组分中使用的载体 是平均粒径为5〜200μm,一次粒子的平均粒径为1〜10μm,平均粒径为1〜10μm的通道的硅胶,其中, 空隙或通道具有基于体积的宏观比例 总颗粒在5至20%的范围内。
    • 58. 发明授权
    • High tenacity, high elongation polypropylene fibers, their manufacture,
and use
    • 高强度,高伸长率的聚丙烯纤维,其制造和使用
    • US5846654A
    • 1998-12-08
    • US652717
    • 1996-05-30
    • James P. Modrak
    • James P. Modrak
    • D01F6/06D01F6/30D02G3/00
    • D01F6/06D01F6/30Y10T428/2916Y10T428/2967
    • Spinning polypropylene at relatively high temperatures with delayed quenching, and drawing at relatively high temperatures with moderate draw ratios, provides fibers having an improved tensile factor, especially improved elongation, and can be used to produce fibers also having a high tenacity. The fibers are particularly useful for reinforcement applications when provided in the form of staple fibers and exhibit a tensile factor TE.sup.0.50 of at least about 60, where T is tenacity (gpd) and E is elongation (percent), especially those having a tenacity of at least about 8 gpd and/or an elongation of at least about 25%, and most especially those having a tenacity of at least about 10 gpd and elongations of 50% to 400%.
    • 在相对较高的温度下用延迟淬火纺丝聚丙烯,并在相当高的温度下以适中的拉伸比进行拉伸,提供具有改进的拉伸系数,特别是改进的伸长率的纤维,并且可以用于生产也具有高强度的纤维。 当以短纤维形式提供时,纤维特别可用于增强应用,并且表现出至少约60的拉伸系数TE0.50,其中T是韧度(gpd),E是伸长率(百分比),特别是具有韧性的那些 至少约8gpd和/或至少约25%的伸长率,最特别是具有至少约10gpd的韧度和50%至400%的伸长率的那些。