公开(公告)号：AT71114T

公开(公告)日：1992-01-15

申请号：AT88109635

申请日：1988-06-16

Applicant: BASF AG

Inventor： SCHUSTER LUDWIG DR ,  HETTCHE ALBERT DR ,  LIEDY WERNER DR ,  WEISS STEFAN DR ,  EHEMANN LEO

IPC: C08F8/50 ,  C08F8/06 ,  C08J5/16 ,  C08L23/26 ,  C08L23/30 ,  C08L27/06

公开(公告)号：DE3869487D1

公开(公告)日：1992-04-30

申请号：DE3869487

申请日：1988-06-16

Applicant: BASF AG

Inventor： SCHUSTER LUDWIG DR ,  HETTCHE ALBERT DR ,  LIEDY WERNER DR ,  WEISS STEFAN DR ,  EHEMANN LEO

IPC: C08F8/50 ,  C08F8/06 ,  C08J5/16 ,  C08L23/26 ,  C08L23/30 ,  C08L27/06

Abstract: Prodn. of oxidised polyethylene (I) with acid number of 10-40 is carried out by oxidising finely-divided HDPE below its softening point and above 100 deg.C with air and/or O2, using HDPE contg. 0.015-0.5wt.% free radical organic cpd. (II). Oxidn. is carried out with oxidn. gas contg. 30-600 mg O3/kg HDPE-h. Pref., the oxidn. gas contains 80-300 mg O3. High temp. oxidn. is followed by vacuum treatment.

公开(公告)号：DE3867332D1

公开(公告)日：1992-02-13

申请号：DE3867332

申请日：1988-06-16

Applicant: BASF AG

Inventor： SCHUSTER LUDWIG DR ,  HETTCHE ALBERT DR ,  LIEDY WERNER DR ,  WEISS STEFAN DR ,  EHEMANN LEO

IPC: C08F8/50 ,  C08F8/06 ,  C08J5/16 ,  C08L23/26 ,  C08L23/30 ,  C08L27/06

Abstract: Prodn. of oxidised polyethylenes (I) with acid number of 10-40 is carried out by oxidising finely-divided HDPE below its softening point and above 100 deg.C with air and/or O2 contg. min. 100 mg O3/kg HDPE-h. Oxidn. is carried out in a paddle drier and the oxidn. gas is passed into the empty gas space over the HDPE. Pref., the temp. in the paddle drier is continuously adjusted to 1-2 deg.C below the softening of the HDPE.

公开(公告)号：DE3720953A1

公开(公告)日：1989-01-05

申请号：DE3720953

申请日：1987-06-25

Applicant: BASF AG

Inventor： SCHUSTER LUDWIG DR ,  HETTCHE ALBERT DR ,  LIEDY WERNER DR ,  WEISS STEFAN DR ,  EHEMANN LEO

IPC: C08F8/50 ,  C08F8/06 ,  C08J5/16 ,  C08L23/26 ,  C08L23/30 ,  C08L27/06 ,  C08F6/00

公开(公告)号：AT74140T

公开(公告)日：1992-04-15

申请号：AT88109637

申请日：1988-06-16

Applicant: BASF AG

Inventor： SCHUSTER LUDWIG DR ,  HETTCHE ALBERT DR ,  LIEDY WERNER DR ,  WEISS STEFAN DR ,  EHEMANN LEO

IPC: C08F8/50 ,  C08F8/06 ,  C08J5/16 ,  C08L23/26 ,  C08L23/30 ,  C08L27/06

公开(公告)号：DE3720952A1

公开(公告)日：1989-01-05

申请号：DE3720952

申请日：1987-06-25

Applicant: BASF AG

Inventor： SCHUSTER LUDWIG DR ,  HETTCHE ALBERT DR ,  LIEDY WERNER DR ,  WEISS STEFAN DR ,  EHEMANN LEO

IPC: C08F8/50 ,  C08F8/06 ,  C08J5/16 ,  C08L23/26 ,  C08L23/30 ,  C08L27/06

Abstract: Oxidized polyethylenes useful as water-emulsifiable waxes and as lubricants in the extrusion of polyvinyl chloride are prepared by oxidizing finely divided polyethylene of high density at elevated temperatures with an oxidation gas of air and/or oxygen, the oxidation gas supplied per hour containing not less the 100 mg of ozone per kilogram of polyethylene, by performing the oxidiation in a paddle dryer and passing the oxidation gas into the free gas space above the polyethylene, the temperature in the paddly dryer preferably being continuously adjusted to from 1 DEG to 2 DEG C. below the softening point of the polyethylene.