244.
    发明专利
    未知

    公开(公告)号:DE4414044A1

    公开(公告)日:1995-10-26

    申请号:DE4414044

    申请日:1994-04-22

    Applicant: BASF AG

    Abstract: Thermoplastic moulding materials (I) contain (A) 5-95 wt.% partly aromatic, partly crystalline copolyamide, derived mainly from (a1) 30-44 mole% terephthalic acid (TPA) units, (a2) 6-20 mole% isophthalic acid (IPA) units, (a3) 43-49.5 mole% hexamethylenediamine (HDA) units and (a4) 0.5-7 mole% 6-30C aliphatic cyclic diamine units, (B) 5-95 wt.% polyphenylene ether (PPE), (C) 0-30 wt.% rubber-elastic polymer, (D) 0-45 wt.% fibrous and/or particulate filler, (E) 0-20 wt.% fire retardant and (F) 0-30 wt.% normal additives and processing aids. Also claimed are moulded prods. obtd. from (I).

    245.
    发明专利
    未知

    公开(公告)号:ES2075012T3

    公开(公告)日:1995-10-01

    申请号:ES89110212

    申请日:1989-06-06

    Applicant: BASF AG

    Abstract: Process for the continuous preparation of linear thermoplastic polyesters, in which a) a transesterification or esterification product of aliphatic and/or aromatic dicarboxylic acids having a molecular weight /l, and in step c), the precondensate is further condensed at a temperature of from 240 to 290 DEG C under a pressure of from 0.5 to 20 mm Hg and a residence time of from 10 to 40 minutes, giving polyesters which are suitable for granulation.

    246.
    发明专利
    未知

    公开(公告)号:DE4321683A1

    公开(公告)日:1995-01-12

    申请号:DE4321683

    申请日:1993-06-30

    Applicant: BASF AG

    Abstract: PCT No. PCT/EP94/01998 Sec. 371 Date Dec. 28, 1995 Sec. 102(e) Date Dec. 28, 1995 PCT Filed Jun. 20, 1994 PCT Pub. No. WO95/01389 PCT Pub. Date Jan. 12, 1995A process for the continuous production of polyamides from a mixture of at least one lactam and water and, if required, other monomer units and/or conventional additives and fillers under polyamide-forming conditions, where the mixture of the starting materials is heated in liquid phase in a first reaction zone until a conversion of at least 70% is reached, and undergoes adiabatic decompression and further polymerization in another reaction zone, wherein, in the first reaction zone, 0.5-7% by weight of water are employed, the temperature is increased to the range from 220 DEG to 310 DEG C., and polymerization is carried out until a conversion of at least 85% is reached and, in the second reaction zone, after the decompression further polymerization is carried out in the range from 215 DEG to 300 DEG C. without heat input.

    Linear polyamide(s) prodn. with purificn. operations

    公开(公告)号:DE4013873A1

    公开(公告)日:1991-10-31

    申请号:DE4013873

    申请日:1990-04-30

    Applicant: BASF AG

    Abstract: A process is claimed for the prodn. of linear polyamides (I) from 4-15C diamines (II) and 4-15C dicarboxylic acids (III) by solid-phase condensation of the corresp. salts in the presence of phosphorus cpds. (IV) as catalysts; the process comprises: (a) reaction of (II) with (III) in a liq. medium at elevated temp., with addn. of (IV) to give a soln., suspension or dispersion of the salt, (b) removing the liq. medium to give solid salt contg. (IV), (c) heating the salt under inert gas at a temp. between 130-5 deg.C below the m.pt. of the salt to give a precondensate with total end-gp. equiv. wt. 5000-12000 m-equiv./kg and (d) further condensation to the required deg. at a temp. above that used in stage (c).

Patent Agency Ranking