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    • 62. 发明授权
    • Process for preparation of block copolymers
    • 嵌段共聚物的制备方法
    • US4291139A
    • 1981-09-22
    • US776048
    • 1977-03-09
    • Adel F. HalasaJames E. HallAdolph Para
    • Adel F. HalasaJames E. HallAdolph Para
    • C08F297/04
    • C08F297/044
    • The process described herein involves the preparation of block copolymers of the S-B-S type wherein S represents a block of polystyrene and B represents a block of polybutadiene. In order to have the initial polystyrene block soluble in the polymerization medium, cyclohexane and aromatic hydrocarbons have been used as the diluent or solvent in these polymerizations. The present process permits the use of hexane as diluent by first preparing a "foot" or small block of homopolydiene to which the initial polystyrene block is thereafter attached. This small block of homopolydiene represents no more than 12 parts, preferably no more than 10 parts by weight of homopolydiene per 100 parts by weight of the block of polystyrene to which it is attached. Generally therefore this block has a molecular weight of 200-5000 depending on the size of the attached polystyrene block and is not large enough to alter the properties of the resultant S-B-S block copolymer except to give the initial polystyrene block greater dispersibility in hexane, heptane, etc.
    • 本文所述的方法涉及制备S-B-S型嵌段共聚物,其中S代表聚苯乙烯嵌段,B代表聚丁二烯嵌段。 为了使初始聚苯乙烯嵌段可溶于聚合介质,环己烷和芳烃已经用作这些聚合中的稀释剂或溶剂。 本方法允许使用己烷作为稀释剂,首先制备其后连接初始聚苯乙烯嵌段的“脚”或均聚二烯的小嵌段。 该均聚亚丁基的该小块相对于每100重量份其所连接的聚苯乙烯嵌段,不超过12重量份,优选不超过10重量份的均聚二烯。 因此,通常该嵌段的分子量为200-5000,取决于连接的聚苯乙烯嵌段的尺寸,并且不足以改变所得SBS嵌段共聚物的性能,除了使初始聚苯乙烯嵌段在己烷,庚烷, 等等
    • 64. 发明授权
    • Coupled resinous diene copolymer with good integral hinge flex life and
high hardness
    • 偶联树脂二烯共聚物具有良好的整体铰链弯曲寿命和高硬度
    • US4091053A
    • 1978-05-23
    • US699731
    • 1976-06-24
    • Alonzo G. Kitchen
    • Alonzo G. Kitchen
    • C08F2/00C08F2/02C08F297/00C08F297/02C08F297/04C08G81/02
    • C08F297/044C08G81/022
    • A conjugated diene/monovinyl-substituted aromatic compound resinous copolymer such as a styrene/butadiene block copolymer is produced using two additions of the monovinyl-substituted aromatic component and initiator in a manner such that the product has 71 to 81 wt. percent monovinyl-substituted aromatic component and has a ratio based on the number average molecular weight of monovinyl-substituted aromatic component blocks in first and second polymer chains thus produced prior to coupling within the range of 3 to 7. The final product resulting from coupling such polymers has long integral hinge flex life and high hardness. This is accomplished by using no more than 5 millimoles of initiator per mole of monomer in the second addition.
    • 共轭二烯/单乙烯基取代的芳族化合物树脂共聚物如苯乙烯/丁二烯嵌段共聚物是使用两种添加的单乙烯基取代的芳族组分和引发剂,使得产物具有71至81重量% 百分比单乙烯基取代的芳族组分,并且具有基于在偶联之前在3至7的范围内由此制备的第一和第二聚合物链中单乙烯基取代的芳族组分嵌段的数均分子量的比例。 聚合物具有长整体铰链弯曲寿命和高硬度。 这通过在第二次添加中使用不超过5毫摩尔引发剂/摩尔单体来实现。