5.
    发明专利
    未知

    公开(公告)号:AT110086T

    公开(公告)日:1994-09-15

    申请号:AT88305099

    申请日:1988-06-03

    Abstract: Aromatic polyamide having good high-temperature resistance and processing ability is obtained when the ratio of storage modulus at the glass transition temperature (Tg) DEG C to the storage modulus of a temperature of (Tg+100) DEG C is less than 3. The aromatic polyamide has a recurring unit [ -HN -Ar1 - NHCO - Ar2 - CO- ] wherein Ar1 is a divalent phenylene group represented by and Ar2 is a divalent phenylene group represented by where R is hydrogen or a methyl radical. r

    CATALYST FOR POLYMERIZING ALPHA-OLEFINS

    公开(公告)号:AU526781B2

    公开(公告)日:1983-01-27

    申请号:AU5513380

    申请日:1980-02-01

    Abstract: Disclosed is a catalyst for polymerizing alpha -olefins which comprises (A) a composition obtained by co-comminuting (a) a magnesium halide, (b) an organic acid ester, (c) a halogenated aliphatic or alicyclic hydrocarbon, (d) at least one ingredient selected from the group consisting of aliphatic hydrocarbons, alicyclic hydrocarbons, aromatic hydrocarbons, halogenated aromatic hydrocarbons, liquid propylene oligomers and aromatic ethers, and (e) an aluminum halide optionally added thereto and then heat-treating the resulting mixture together with titanium tetrachloride; (B) an organic aluminum compound; and (C) an organic acid ester or a complex thereof with an aluminum halide.

    10.
    发明专利
    未知

    公开(公告)号:FR2501698A1

    公开(公告)日:1982-09-17

    申请号:FR8204256

    申请日:1982-03-12

    Abstract: Disclosed is a process for the preparation of polyamide compounds by reacting at least one polycarboxylic acid with at least one diisocyanate in the presence of a catalyst comprising at least one mono-alkali metal salt of dicarboxylic acid. The polyamide compounds prepared by this process have a substantially linear configuration and a high degree of polymerization and, therefore, are suitable for the manufacture of fibers, films and molded articles.

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