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    • 1. 发明授权
    • Anionically polymerized block copolymers of ethylene and cyclic siloxane
monomers
    • 乙烯和环状硅氧烷单体的阴离子聚合嵌段共聚物
    • US5618903A
    • 1997-04-08
    • US634078
    • 1996-04-17
    • Ronald J. HoxmeierDonn A. DuBoisJeffrey G. Southwick
    • Ronald J. HoxmeierDonn A. DuBoisJeffrey G. Southwick
    • C08G77/442
    • C08G77/442
    • This invention relates to anionically polymerized block copolymers comprised of at least one block polyethylene and at least one block of a polymerized cyclic siloxane monomer, e.g., polydimethylsiloxane. Block copolymers with multiple "arms" may be formed by coupling these living diblocks with polyfunctional coupling agents. One copolymer for use in wax release coatings has an overall weight average molecular weight of 1500 to 100,000, a polyethylene block weight average molecular weight of less than 4100, and a polyethylene content of less than 55 percent by weight. Another copolymer for use in extruded release coating films prepared by blending the copolymer with a film grade polymer has an overall molecular weight of less than 20,000 and a polyethylene block molecular weight of less than 3700.
    • 本发明涉及由至少一个嵌段聚乙烯和至少一个聚合的环状硅氧烷单体例如聚二甲基硅氧烷组成的阴离子聚合嵌段共聚物。 可以通过将这些活性二嵌段与多官能偶联剂偶联来形成具有多个“臂”的嵌段共聚物。 用于蜡剥离涂料的一种共聚物的总重均分子量为1500-100,000,聚乙烯嵌段重均分子量小于4100,聚乙烯含量小于55重量%。 通过将共聚物与膜级聚合物共混制备的用于挤出脱模涂膜的另一种共聚物的总分子量小于20,000,聚乙烯嵌段分子量小于3700。