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    • 4. 发明授权
    • Polyolefin elastomer blends exhibiting improved properties
    • 表现出改进性能的聚烯烃弹性体共混物
    • US6005053A
    • 1999-12-21
    • US784681
    • 1997-01-22
    • Deepak R. ParikhPak-Wing S. ChumRajen M. PatelKlye G. KummerPradeep JainThomas J. McKeand, Jr.Ronald P. MarkovichTimothy E. ClayfieldWasif Ahmed Khan
    • Deepak R. ParikhPak-Wing S. ChumRajen M. PatelKlye G. KummerPradeep JainThomas J. McKeand, Jr.Ronald P. MarkovichTimothy E. ClayfieldWasif Ahmed Khan
    • C08L23/04C08L23/08C08L91/00C08L33/02
    • C08L23/0815C08L2205/02C08L91/00
    • Polymer mixtures are disclosed which comprise at least one homogeneously branched ethylene polymer (A) and at least one ethylene polymer (B) having a crystallinity which is at least 7% greater than the crystallinity of polymer (A) with certain provisos. A process for making a molded article using the disclosed polymer mixtures is disclosed as well as films, film layers, coatings and molded articles formed from those mixtures. These mixtures have several advantages over polymer compositions of the prior art, including improved properties at elevated temperatures such as improved softening point under load, improved hardness, improved toughness, improved 100% modulus of elasticity, improved compression set, improved ability to prevent oil bleed out at lower temperatures when the mixture contains oil and reduced injection molding cycle time. The mixtures retain their performance advantages even when substantial amounts of additives such as oil and filler are incorporated into the mixture. The mixtures may also be crosslinked after they are formed into the shape of an article to form vulcanized elastomeric products. The polymer mixtures have utility in a variety of applications.
    • 公开了包含至少一种均匀支化的乙烯聚合物(A)和至少一种乙烯聚合物(B)的聚合物混合物,其结晶度比聚合物(A)的结晶度大至少7%,具有某些条件。 公开了使用所公开的聚合物混合物制备模塑制品的方法以及由这些混合物形成的薄膜,薄膜层,涂层和模塑制品。 这些混合物具有优于现有技术的聚合物组合物的几个优点,包括在升高的温度下改进的性能,例如负载下改进的软化点,改进的硬度,改进的韧性,改进的100%弹性模量,改进的压缩永久变形,改进的防止油渗出的能力 当混合物含有油和降低注塑周期时,在较低的温度下出来。 即使将大量的添加剂如油和填料加入到混合物中,混合物也保持其性能优势。 在混合物形成制品的形状以形成硫化的弹性体产品之后,它们也可以交联。 聚合物混合物可用于各种应用。
    • 8. 发明授权
    • Gaskets made from olefin polymers
    • 由烯烃聚合物制成的垫圈
    • US06235822B1
    • 2001-05-22
    • US09360661
    • 1999-07-26
    • Alan R. WhettenRonald P. MarkovichSteve M. HoenigEdward E. Greene
    • Alan R. WhettenRonald P. MarkovichSteve M. HoenigEdward E. Greene
    • C08J523
    • C09K3/10B29C44/5627B65D53/06C08J9/04C08J2323/04C08L23/04C08L23/08C08L23/0815C08L23/0846C08L23/0876C08L2314/06C09K2200/047C09K2200/0617C09K2200/062C09K2200/0625C08L2666/04C08L2666/06
    • Gaskets comprising either at least one homogeneously branched ethylene polymer or at least one elastic substantially linear ethylene polymer, at least one ethylene/carboxylic acid interpolymer; and at least one slip agent are disclosed. These gaskets may also contain enhanced polyethylenes produced by the direct polymerization of various combinations of novel elastic substantially linear olefin polymers in multiple reactors using either single or multiple catalysts. These gaskets may also be comprised of at least one ethylene polymer and at least one ionomer. The above mentioned gaskets may also contain slip agents and/or foaming agents. The gaskets are particularly useful for sealing food and liquid containers and do not contribute to taste and/or odor of the packaged product, which is especially useful in food-stuff applications. Gaskets comprising substantially linear ethylene polymers have processability similar to highly branched low density polyethylene (LDPE), but the strength and toughness of linear low density polyethylene (LLDPE).
    • 垫片包括至少一种均匀支化的乙烯聚合物或至少一种弹性基本上线性的乙烯聚合物,至少一种乙烯/羧酸互聚物; 并且公开了至少一种滑爽剂。 这些垫圈还可以包含通过使用单一或多个催化剂在多个反应器中直接聚合新型弹性基本上线性的烯烃聚合物的各种组合产生的增强的聚乙烯。 这些垫片也可以由至少一种乙烯聚合物和至少一种离聚物组成。 上述垫圈也可以含有滑爽剂和/或发泡剂。 垫圈特别适用于密封食品和液体容器,并且不会对包装产品的味道和/或气味产生影响,这在食品应用中特别有用。 包含基本上线性的乙烯聚合物的垫圈具有类似于高支化低密度聚乙烯(LDPE)的加工性能,但是线性低密度聚乙烯(LLDPE)的强度和韧性。