THERMOELASTIC BLEND COMPOSITIONS
    2.
    发明公开
    THERMOELASTIC BLEND COMPOSITIONS 失效
    热塑性组合

    公开(公告)号:EP0767814A1

    公开(公告)日:1997-04-16

    申请号:EP95923682.0

    申请日:1995-06-01

    IPC分类号: C08L23 C08L53 C09D153 C09J153

    摘要: The present invention is at least a two-component thermoplastic elastomeric composition comprising at least one block copolymer wherein the composition has essentially the same comparative elasticity, high temperature serviceability and hardness as the unmodified, undiluted (neat) block copolymer portion of the composition. The composition also shows enhanced thermal stability and processibility and is well suited for fabricating elastic moldings, films and fibers as well as for formulating with asphalts, adhesives and sealants. The novel thermoplastic elastomeric composition comprises (a) from about 50 to about 99 percent by weight of at least one block copolymer and (b) about 1 to about 50 percent by weight of at least one ethylene interpolymer having a density from about 0.855 g/cc to about 0.905 g/cc, wherein the ethylene interpolymer in the amount employed is a substantially inert extender of the block copolymer and the composition is further characterized as having:i. storage moduli throughout the range of -26° C. to 24° C. of less than about 3.5x109 dynes/cm2,ii. a ratio of storage modulus at -26° C. to storage modulus at 24° C. of less than about 4, andiii. storage moduli at -26° C. and 24° C. about 0.2 to about 3 times higher than the storage moduli at -26° C. and 24° C., respectively, of the neat block copolymer portion of the composition.

    POLYOLEFIN ELASTOMER BLENDS EXHIBITING IMPROVED PROPERTIES
    5.
    发明授权
    POLYOLEFIN ELASTOMER BLENDS EXHIBITING IMPROVED PROPERTIES 失效
    具有改进性能的聚烯烃弹性体组合物

    公开(公告)号:EP0876427B1

    公开(公告)日:2002-09-25

    申请号:EP97903105.1

    申请日:1997-01-22

    IPC分类号: C08L23/16 C08L23/04 C08L23/08

    摘要: 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 percent 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 percent 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 cross-linked 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.

    POLYOLEFIN ELASTOMER BLENDS EXHIBITING IMPROVED PROPERTIES
    7.
    发明公开
    POLYOLEFIN ELASTOMER BLENDS EXHIBITING IMPROVED PROPERTIES 失效
    具有改进性能的聚烯烃弹性体组合物

    公开(公告)号:EP0876427A1

    公开(公告)日:1998-11-11

    申请号:EP97903105.0

    申请日:1997-01-22

    IPC分类号: C08L23 C08L91

    摘要: 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 percent 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 percent 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 cross-linked 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.

    THERMOELASTIC BLEND COMPOSITIONS
    10.
    发明授权
    THERMOELASTIC BLEND COMPOSITIONS 失效
    热塑性组合

    公开(公告)号:EP0767814B1

    公开(公告)日:1999-08-25

    申请号:EP95923682.9

    申请日:1995-06-01

    IPC分类号: C08L53/02 C08L23/16

    摘要: The present invention is at least a two-component thermoplastic elastomeric composition comprising at least one block copolymer wherein the composition has essentially the same comparative elasticity, high temperature serviceability and hardness as the unmodified, undiluted (neat) block copolymer portion of the composition. The composition also shows enhanced thermal stability and processibility and is well suited for fabricating elastic moldings, films and fibers as well as for formulating with asphalts, adhesives and sealants. The novel thermoplastic elastomeric composition comprises (a) from about 50 to about 99 percent by weight of at least one block copolymer and (b) about 1 to about 50 percent by weight of at least one ethylene interpolymer having a density from about 0.855 g/cc to about 0.905 g/cc, wherein the ethylene interpolymer in the amount employed is a substantially inert extender of the block copolymer and the composition is further characterized as having:i. storage moduli throughout the range of -26° C. to 24° C. of less than about 3.5x109 dynes/cm2,ii. a ratio of storage modulus at -26° C. to storage modulus at 24° C. of less than about 4, andiii. storage moduli at -26° C. and 24° C. about 0.2 to about 3 times higher than the storage moduli at -26° C. and 24° C., respectively, of the neat block copolymer portion of the composition.