Polymeric compositions
    1.
    发明授权
    Polymeric compositions 失效
    聚合物组合物

    公开(公告)号:US4332855A

    公开(公告)日:1982-06-01

    申请号:US896244

    申请日:1978-04-14

    摘要: New polymeric compositions based on polytetramethylene terephthalate (PTMT) polymers are disclosed. PTMT polymers are subject to embrittlement, especially at elevated temperatures and when a flame retardant is incorporated therein. This problem is substantially reduced by blending the PTMT polymer with a second polymer which has a flex modulus of 500 to 100,000 psi and a solubility parameter within .+-.1.5 of the PTMT polymer, for example an ethylene/vinyl acetate copolymer or a block copolymer containing polyether and polyester blocks. The compositions are particularly useful as wire insulation.

    摘要翻译: 公开了基于聚对苯二甲酸丁二醇酯(PTMT)聚合物的新型聚合物组合物。 PTMT聚合物易于脆化,特别是在升高的温度下并且当其中掺入阻燃剂时。 通过将PTMT聚合物与PTMT聚合物(例如乙烯/乙酸乙烯酯共聚物或嵌段共聚物)的挠曲模量为500至100,000psi且溶解度参数的+/- 1.5中的第二聚合物共混来显着降低该问题, 含聚醚和聚酯嵌段。 组合物特别适用于电线绝缘。

    Polymeric blends
    2.
    发明授权
    Polymeric blends 失效
    聚合物共混物

    公开(公告)号:US4935467A

    公开(公告)日:1990-06-19

    申请号:US166954

    申请日:1988-03-11

    摘要: Novel compositions comprise a blend of(A) a thermoplastic polymer selected from copolymers of ethylene and tetrafluoroethylene, and thermoplastic vinylidene fluoride polymers; and(B) a thermoplastic elastomer having (i) at least one elastomeric segment comprising (a) vinylidene fluoride, hexa- or pentafluoropropylene, and tetrafluoroethylene repeating units in a mole ratio of 45-90:5-50:0-35 or (b) perfluoro(alkyl vinyl ether), tetrafluoroethylene and vinylidene fluoride repeating units in a mole ratio of 15-75:0-85:0-85; and (ii) at least one nonelastomeric segment selected from segments comprising ethylene and tetrafluoroethylene repeating units in a mole ratio of 40-60:60-40, and segments comprising vinylidene fluoride, hexafluoropropylene and tetrafluoroethylene repeating units in a mole ratio of 0-100:0-50:0-100,with the proviso that if the thermoplastic polymer is a vinylidene fluoride polymer, the blend is crosslinked.

    摘要翻译: 新型组合物包含(A)选自乙烯和四氟乙烯的共聚物的热塑性聚合物和热塑性偏二氟乙烯聚合物的共混物; 和(B)热塑性弹性体,其具有(i)至少一种弹性体链段,其包含(a)偏二氟乙烯,六氟丙烯和五氟丙烯,和四氟乙烯重复单元,其摩尔比为45-90:5-50:0-35或( b)摩尔比为15-75:0-85:0-85的全氟(烷基乙烯基醚),四氟乙烯和偏二氟乙烯重复单元; 和(ii)选自摩尔比为40-60:60-40的乙烯和四氟乙烯重复单元的段的至少一个非弹性链段,以及摩尔比为0-100的偏二氟乙烯,六氟丙烯和四氟乙烯重复单元的链段 :0-50:0-100,条件是如果热塑性聚合物是偏二氟乙烯聚合物,则共混物是交联的。

    Polymeric compositions containing brominated flame retardants
    3.
    发明授权
    Polymeric compositions containing brominated flame retardants 失效
    含有溴化阻燃剂的聚合物组合物

    公开(公告)号:US4129616A

    公开(公告)日:1978-12-12

    申请号:US828731

    申请日:1977-08-29

    摘要: Peroxide cross-linked polymeric compositions containing brominated flame retardants have reduced water absorption if an unsaturated co-agent is used to reduce the amount of peroxide needed to effect cross-linking. This makes it possible to replace part or all of the chlorinated flame retardants conventionally used and yet to obtain cross-linked compositions which meet the IPCEA water absorption requirements and can therefore be used for insulating electrical wire and cable.

    摘要翻译: 包含溴化阻燃剂的过氧化物交联聚合物组合物如果使用不饱和助剂来减少进行交联所需的过氧化物的量,则其吸水率降低。 这使得可以替换常规使用的部分或全部氯化阻燃剂,并且获得满足IPCEA吸水要求的交联组合物,因此可用于绝缘电线和电缆。