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    • 23. 发明授权
    • Rheology modification of low density polyethylene
    • 低密度聚乙烯的流变改性
    • US06521306B1
    • 2003-02-18
    • US09129163
    • 1998-08-05
    • Wendy D. HoenigTeresa KarjalaLi-Min TauClark H. CumminsMichael J. MullinsH. Craig SilvisThoi H. Ho
    • Wendy D. HoenigTeresa KarjalaLi-Min TauClark H. CumminsMichael J. MullinsH. Craig SilvisThoi H. Ho
    • B29D2200
    • C08L23/02C08G81/02C08K5/43C08L23/04C08L23/06C08L23/08C08L23/0815C08L23/0838C08L23/0853C08L23/16C08L2205/22C08L2312/00C08L2314/06Y10T428/1334Y10T428/1352Y10T428/1386Y10T428/139Y10T428/31913Y10T428/31917C08L2666/04
    • The invention includes a process of preparing a coupled polymer characterized by heating an admixture containing (1) at least one ethylene polymer or blend of ethylene polymers having a density of at least about 0.89 g/mL and less than about 0.935 g/mL and a comonomer content between about 0.5 and 50 weight percent of an alpha olefin having greater than 2 and less than 20 carbon atoms per molecule and (2) a coupling amount of at least one poly(sulfonyl azide) to at least the decomposition temperature of the poly(sulfonyl azide) for a period sufficient for decomposition of at least about 80 weight percent of the poly(sulfonyl azide) and sufficient to result in a coupled polymer. The amount of poly(sulfonyl azide) is preferably from about 0.01 to about 5 weight percent of polymers in the admixture. The invention also includes any composition which is the product of any of the processes of the invention and articles made from those compositions, particularly any film of any composition of the invention. Additionally the invention includes a use of any composition of the invention in a process of blowing, casting or calendaring a film. More particularly the invention includes articles of compositions of the invention which are trash bags, agricultural films, construction films, or geomembranes, grocery sacks, sealant layers, tie layers, produce bags, garment bags, shipping sacks, medical films, stretch films, shrink films, agricultural films, greenhouse films, construction films, or stretch hooders.
    • 本发明包括一种制备偶联聚合物的方法,其特征在于加热含有(1)至少一种乙烯聚合物或密度为至少约0.89g / mL且小于约0.935g / mL的乙烯聚合物的共混物的混合物, 共聚单体含量为约0.5至50重量%的每分子具有大于2个且小于20个碳原子的α-烯烃,和(2)至少一个聚(磺酰基叠氮化物)的偶联量至少达到聚 (磺酰基叠氮化物)足以分解至少约80重量%的聚(磺酰基叠氮化物)并足够导致偶联聚合物的时间。 聚(磺酰基叠氮化物)的量优选为混合物中约0.01至约5重量%的聚合物。 本发明还包括任何组合物,其是本发明任何方法的产物和由这些组合物制成的制品,特别是本发明任何组合物的任何薄膜。 此外,本发明包括在吹塑,浇铸或压延膜的方法中使用本发明的任何组合物。 更具体地,本发明包括本发明的制品,其为垃圾袋,农用膜,建筑膜或土工膜,杂货袋,密封剂层,连接层,生产袋,服装袋,运输袋,医疗膜,拉伸膜,收缩 电影,农膜,温室膜,建筑膜或拉伸罩。