公开(公告)号：DK85376A

公开(公告)日：1976-08-29

申请号：DK85376

申请日：1976-02-27

Applicant: HOECHST AG

Inventor： SEXTRO G ,  BURG K ,  SCHLAF H ,  LEUGERING H J ,  HELLER A

IPC: C08G2/00 ,  B29B9/00 ,  B29B9/12 ,  B29B9/16 ,  C08G2/30 ,  C08J3/12 ,  C08J

公开(公告)号：DK496675A

公开(公告)日：1976-05-08

申请号：DK496675

申请日：1975-11-05

Applicant: HOECHST AG

Inventor： SEXTRO G ,  BURG K ,  LEUGERING H J ,  SCHLAF H ,  HELLER A

IPC: C08G2/00 ,  C08J3/14 ,  C08J3/16

Abstract: Oxymethylene polymers (POM) are obtained in granular form by cooling a POM solution or dispersion having a temperature above the sintering temperature of the POM in two stages to a temperature just below the said sintering temperature. The solvent or dispersion agent used is a mixture of methanol and water and the cooling agent is a methanol/water mixture which may contain POM suspended therein. The granular POM obtained is suitable as technical material for making shaped articles.

公开(公告)号：DK218775A

公开(公告)日：1975-11-19

申请号：DK218775

申请日：1975-05-16

Applicant: HOECHST AG

Inventor： GORDON W ,  LEUGERING H J ,  SCHAEFER H

IPC: D01F6/04 ,  D01D1/02 ,  D01D5/11 ,  D01F1/04 ,  D01F1/10 ,  D01F6/46 ,  D21H13/14 ,  D01F

Abstract: Hydrophilic polyolefin fibers containing inorganic pigments are obtained by means of flash evaporation of a superheated suspension, which is under at least autogenous pressure. The suspension comprises a dispersion of a hydrophobized inorganic pigment in an emulsion prepared from a solution of a polyolefin in an easily boiling solvent and an aqueous solution of a hydrophilizing agent. The suspension is passed through a nozzle into a low pressure zone to form pigmented fibers.

公开(公告)号：DK140850C

公开(公告)日：1980-04-28

申请号：DK496675

申请日：1975-11-05

Applicant: HOECHST AG

Inventor： SEXTRO G ,  BURG K ,  LEUGERING H J ,  SCHLAF H ,  HELLER A

IPC: C08G2/00 ,  C08J3/14 ,  C08J3/16

Abstract: Oxymethylene polymers (POM) are obtained in granular form by cooling a POM solution or dispersion having a temperature above the sintering temperature of the POM in two stages to a temperature just below the said sintering temperature. The solvent or dispersion agent used is a mixture of methanol and water and the cooling agent is a methanol/water mixture which may contain POM suspended therein. The granular POM obtained is suitable as technical material for making shaped articles.

公开(公告)号：DK147475A

公开(公告)日：1975-10-09

申请号：DK147475

申请日：1975-04-07

Applicant: HOECHST AG

Inventor： STRAMETZ H ,  LEUGERING H J ,  RUST K ,  ENGELMANN M

IPC: C08L23/00 ,  C08F2/00 ,  C08F2/14 ,  C08F297/00 ,  C08F297/08 ,  C08L7/00 ,  C08L21/00 ,  C08L23/06 ,  C08L23/08 ,  C08L23/10 ,  C08L23/12 ,  C08L23/16 ,  C08L101/00 ,  C08L

Abstract: 1508033 Polyolefin compositions HOECHST AG 7 April 1975 [8 April 1974] 14080/75 Headings C3P and C3M Moulding compositions comprising (1) 70 to 90 weight per cent of crystalline polypropylene, (2) 2 to 10 weight per cent of an ethylene/propylene copolymer and (3) 8 to 25 weight per cent of polyethylene wherein the melt flow index of the composition is less than that of the polypropylene component and greater by a factor of 1À3 to 7À0 than that of polypropylene prepared by means of the same catalyst as the moulding composition and having the same reduced specific viscosity, may be prepared by (a) preparing polypropylene of melt flow index 5 to 80 g./10 mins. by polymerizing propylene at 0À5 to 40 kg/cm. and 40 to 110‹ C. in the presence of a stereo specific catalyst and 0- 1 to 20% by volume, based on the propylene, of hydrogen, (b) introducing ethylene at a propylene partial pressure of less than 0À5 kg./ cm. and 40‹ to 110‹ C. and (c) preparing polyethylene in a third step at a propylene partial pressure of less than 0À001 kg./cm. and a total pressure of 0À5 to 40 kg./cm. and at 40‹ to 110‹ C. in the presence of 1 to 50% by volume of hydrogen. In examples the polymers are prepared by sequential polymerization in the presence of catalysts comprising titanium trichloride and diethyl aluminium chloride.