公开(公告)号：WO1992020725A1

公开(公告)日：1992-11-26

申请号：PCT/US1992004334

申请日：1992-05-22

Applicant: THE DOW CHEMICAL COMPANY ,  EXXON CHEMICAL PATENTS INC.

Inventor： THE DOW CHEMICAL COMPANY ,  EXXON CHEMICAL PATENTS INC. ,  DIEHL, Charles, F. ,  MARCHAND, Gary, R. ,  MYERS, Michael, O. ,  TANCREDE, Jean, M.

IPC: C08F297/04

CPC classification number: A61L15/58 ,  A61F13/58 ,  B32B7/12 ,  C08F297/046 ,  C08L2666/02 ,  C09J153/02 ,  Y10T428/24826 ,  Y10T428/31855 ,  Y10T428/31924 ,  Y10T442/678 ,  C08L53/02

Abstract: Radial block copolymers characterized by the formulae: (1) (pS-pI)nX and (2) (pS-pI-pB)nX where pS is polystyrene, pI is polyisoprene, pB is butadiene, X is a residue of a multifunctional coupling agent used in the production of the radial block copolymer, and n is a number greater than 2 representative of the number of branches appended to X; hot-melt adhesive compositions constituted of said radial block copolymers, and articles of manufacture produced therefrom. These compolymers possess blocks of high average molecular weight polystyrene (10,000 to 25,000) and an overall average molecular weight (90,000 to 380,000) such that when blended in requisite proportions with a compatible tackifier resin, preferably also a secondary tackifying resin or plasticizing oil, and stabilizer, superior hot-melt adhesive compositions can be formed. The hot-melt adhesive compositions possess, inter alia, superior heat resistance, superior static time to failure with low viscosity, good peel adhesion, good tack, and high ability to bond to a polyethylene or polypropylene substrate at temperatures below that which may damage the substrate.

Abstract translation: 其特征在于式（1）（pS-pI）nX和（2）（pS-pI-pB）nX的径向嵌段共聚物，其中pS是聚苯乙烯，pI是聚异戊二烯，pB是丁二烯，X是多官能偶联 用于生产径向嵌段共聚物的试剂，n为大于2的数字，代表附着于X的分枝数; 由所述径向嵌段共聚物构成的热熔粘合剂组合物和由其制备的制品。 这些共聚物具有高平均分子量聚苯乙烯（10,000至25,000）和总平均分子量（90,000至380,000）的嵌段，使得当以相容的比例与相容性增粘树脂（优选也可以是二次增粘树脂或增塑油）共混时， 可以形成优良的热熔粘合剂组合物。 热熔性粘合剂组合物具有优异的耐热性，优异的静态时间与低粘度的破坏，良好的剥离粘合性，良好的粘性，以及在低于可能损坏聚乙烯或聚丙烯基材的温度下结合到聚乙烯或聚丙烯基材上的高能力 基质。

公开(公告)号：WO1996025442A1

公开(公告)日：1996-08-22

申请号：PCT/US1996001852

申请日：1996-02-12

Applicant: THE DOW CHEMICAL COMPANY

Inventor： THE DOW CHEMICAL COMPANY ,  WOODSON, Gary, E. ,  ESNEAULT, Calvin, P. ,  MYERS, Michael, O. ,  MARCHAND, Gary, R.

IPC: C08F297/04

CPC classification number: C08F297/04

Abstract: The invention is a process for the preparation of tapered block copolymers according to one of the formulae: B-t-A or A-B-t-A, wherein A comprises a polymer block derived from one or more monovinylidene aromatic monomers, B comprises a polymer block derived from one or more conjugated dienes, and t is a tapered polymer block derived from one or more monovinylidene aromatic monomers and one or more conjugated dienes wherein the portion of the block closest to block A is rich in monovinylidene aromatic monomer units, the portion of the block closest to block B is rich in conjugated diene units and the relative amount of conjugates diene and monovinylidene aromatic monomer units gradually changes along the backbone of the tapered block, comprising: a) contacting one or more conjugated dienes with a monofunctional lithium alkyl initiator or a polymer block derived from monovinylidene aromatic monomers with a terminal living lithium anion capable of initiating anionic polymerization and a hydrocarbon solvent, in a closed reactor equipped with a reflux condenser under conditions of reflux; b) partially polymerizing the one or more conjugated dienes; and c) after step b), contacting with the reaction mixture one or more monovinylidene aromatic monomers under conditions such that the unreacted conjugated diene and monovinylidene monomers polymerize; wherein the materials condensed during the process are recycled to the reactor.

Abstract translation: 本发明是一种制备根据下式之一的锥形嵌段共聚物的方法：BtA或ABtA，其中A包含衍生自一种或多种单亚乙烯基芳族单体的聚合物嵌段，B包含衍生自一种或多种共轭二烯 ，t是衍生自一种或多种单亚乙烯基芳族单体和一种或多种共轭二烯的渐缩聚合物嵌段，其中最接近嵌段A的嵌段的部分富含单亚乙烯基芳族单体单元，最接近嵌段B的嵌段的部分为 富含共轭二烯单元和共轭二烯和单亚乙烯基芳族单体单元的相对量沿着锥形嵌段的主链逐渐变化，包括：a）使一种或多种共轭二烯与单官能的烷基锂引发剂或衍生自单亚乙烯基的聚合物嵌段 具有末端活性的锂离子能引发阴离子聚合的芳族单体和 在回流条件下装备有回流冷凝器的封闭反应器中; b）部分聚合所述一种或多种共轭二烯; 和c）在步骤b）之后，使反应混合物与一种或多种单亚乙烯基芳族单体在未反应的共轭二烯和单亚乙烯基单体聚合的条件下接触; 其中在该过程中冷凝的材料被再循环到反应器中。

公开(公告)号：WO1991002039A1

公开(公告)日：1991-02-21

申请号：PCT/US1990004408

申请日：1990-08-07

Applicant: THE DOW CHEMICAL COMPANY ,  EXXON CHEMICAL PATENTS INC.

Inventor： THE DOW CHEMICAL COMPANY ,  EXXON CHEMICAL PATENTS INC. ,  DIEHL, Charles, F. ,  MYERS, Michael, O. ,  TANCREDE, Jean, M.

IPC: C09J153/02

CPC classification number: B32B7/12 ,  A61L15/58 ,  B32B27/32 ,  B32B2323/10 ,  B32B2555/02 ,  C08F297/046 ,  C08L2666/02 ,  C09J153/02 ,  Y10T428/2826 ,  Y10T428/2883 ,  C08L53/02

Abstract: Polystyrene-polyisoprene-polystyrene block copolymers, hot-melt adhesive compositions constituted of polystyrene-polyisoprene-polystyrene block copolymers, and articles of manufacture produced therefrom. These copolymers possess blocks of high average molecular weight polystyrene (12,000 to 20,000) and low overall average molecular weight (60,000 to 110,000) such that when blended in requisite proportions with a compatible tackifier resin, preferably also a secondary tackifying resin or plasticizing oil, and stabilizer, superior hot-melt adhesive compositions can be formed. The hot-melt adhesive compositions possess, inter alia, superior heat resistance, superior static time to failure with low viscosity, good peel adhesion, good tack, and high ability to bond to a polyethylene or polypropylene substrate at temperatures below that which may damage the substrate.