中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

264 records (took 0.025 seconds)

    142.
    发明专利
    未知

    公开(公告)号：NO973767D0

    公开(公告)日：1997-08-15

    申请号：NO973767

    申请日：1997-08-15

    Applicant: BASF AG

    Inventor： WARZELHAN VOLKER ,  PIPPER GUNTER ,  SEELIGER URSULA ,  BAUER PETER ,  PAGGA UDO ,  YAMAMOTO MOTONORI

    IPC: C08G63/60 ,  C08J9/04 ,  C08G63/66 ,  C08G63/672 ,  C08G63/91 ,  C08L3/00 ,  C08L67/00 ,  C08L101/16 ,  C09J167/00 ,  D21H19/28 ,  C08G

    Abstract: PCT No. PCT/EP96/00458 Sec. 371 Date Aug. 14, 1997 Sec. 102(e) Date Aug. 14, 1997 PCT Filed Feb. 3, 1996 PCT Pub. No. WO96/25448 PCT Pub. Date Aug. 22, 1996Biodegradable polymers comprising a polyether ester P1 obtained by reacting a first mixture of 20-95 mol% of adipic acid or ester-forming derivatives thereof or mixtures thereof, 5-80 mol% of terephthalic acid or ester-forming derivatives thereof or mixtures thereof, and 0-5 mol% of a compound containing sulfonate groups, and a second mixture of 15-99.8 mol% of a dihydroxy compound selected from the group consisting of C2-C6-alkanediols and C5-C10-cycloalkanediols, 85-0.2 mol% of a dihydroxy compound IHO-[(CH2)n-O]m-H(n=2, 3 or 4, m=2-250) with 0-5 mol%, based on the first mixture, of a compound D having at least three groups capable of ester formation, and a bisoxazoline C1, their preparation and their use in the manufacture of biodegradable molding materials.

    Process for the continuous production of low molecular polyamides
    145.
    发明专利
    Process for the continuous production of low molecular polyamides 未知

    公开(公告)号：AU7186594A

    公开(公告)日：1995-01-24

    申请号：AU7186594

    申请日：1994-06-20

    Applicant: BASF AG

    Inventor： PIPPER GUNTER ,  KLEINKE ANDREAS ,  HILDENBRAND PETER

    IPC: C08G69/14 ,  B01J19/28 ,  C08G69/04 ,  C08G69/16 ,  C08G69/46

    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.

    146.
    发明专利
    未知

    公开(公告)号：DE59007022D1

    公开(公告)日：1994-10-13

    申请号：DE59007022

    申请日：1990-04-14

    Applicant: BASF AG

    Inventor： PIPPER GUNTER ,  KOCH ECKHARD MICHAEL DR

    IPC: C08G69/28

    Abstract: A process for the continuous preparation of polytetramethylene adipamide, in which (a) an aqueous solution of the salt of 1,4-diaminobutane and adipic acid is heated with evaporation of water to form a vapor phase and a molten prepolymer, (b) the said prepolymer and vapor phase are passed, to effect thorough mixing thereof, through a mass transfer zone equipped with baffles and located immediately downstream of stage (a), (c) the said vapor phase is separated from the polymer in a separting zone and the polymer is discharged in the form of a melt capable of being granulated, with the proviso that the total residence time in stages (a), (b) and (c) is less than 5 minutes, and (d) pyrrolidine is distilled off from the vapor phase separated in stage (c) and 1,4-diaminobutane is recycled to the vaporizing stage (a).

    148.
    发明专利
    未知

    公开(公告)号：DE59100547D1

    公开(公告)日：1993-12-09

    申请号：DE59100547

    申请日：1991-04-19

    Applicant: BASF AG

    Inventor： PIPPER GUNTER ,  MUELLER WOLFGANG F DR ,  DAUNS HARALD DR

    IPC: C08G69/30 ,  C08G69/28

    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