公开(公告)号：DE1807493A1

公开(公告)日：1970-06-11

申请号：DE1807493

申请日：1968-11-07

Applicant: BASF AG

Inventor： STEIGERWALD DR KLAUS ,  BUECHNER DR OSKAR ,  BALL DR WOLFGANG ,  PFANNMUELLER DR HELMUT ,  URBAN DR FRIEDRICH

IPC: C08F10/00 ,  C08F3/04

Abstract: 1278649 Polymerizing ethylene BADISCHE ANILIN- & SODA-FABRIK AG 6 Nov 1969 [7 Nov 1968] 54426/69 Heading C3P Ethylene homopolymers are prepared by continuous polymerization of ethylene in the presence of organic peroxide initiator and a polymerization modifier at 280‹ to 340‹ C. and 1500 to 4000 atmospheres in a tubular reactor having two successive reaction zones of about equal length, a mixture of ethylene, peroxide and modifier being introduced at the beginning of each stage, wherein (1) a mixture of ethylene, 1 to 5 mole p.p.m. of an organic hydroperoxide having a half value temperature in the range 200‹ to 260‹ C. and 1À2 to 1À7 parts by weight per 100 ethylene of a modifier having a C s value of 2À0 Î 10 -2 to 1À0 Î 10 -4 is introduced at 170‹ to 220‹ C. to the beginning of the first zone in which the reaction temperature is kept in the range 310‹ to 340‹ C., and (2) a mixture of ethylene, 5 to 20 mole p.p.m. of an organic peroxy compound having a half value temperature in the range 150‹ to 195‹ C. and 1À2 to 1À7 parts by weight per 100 ethylene of a modifier having a C s value in the above range is introduced at 160‹ to 190‹ C. to the beginning of the second zone in which the reaction temperature is kept in the range 280‹ to 300‹ C., the half value temperatures of said hydroperoxide and peroxy compound differing by at least 20‹ C. and the weight ratio of the mixtures introduced per unit time being in the range 1 : 2 to 2 : 1. Specified hydroperoxides are p-menthane, cumene and diisopropylbenzene monohydroperoxide, and 2- hydroperoxy - 2 - (isopropylphenyl) propanes and mixtures thereof. Specified peroxides are di-t-butyl peroxide, t-butyl peracetate, t-butyl perbenzoate and methyl ethyl ketone peroxide. Specified modifiers are propylene, propane, methane and cyclohexane. The products have a broad molecular weight distribution free from very high molecular weight constituents, and are useful for making laminating films and for coating paper and fabrics.

公开(公告)号：DE1809045A1

公开(公告)日：1970-06-18

申请号：DE1809045

申请日：1968-11-15

Applicant: BASF AG

Inventor： STEIGERWALD DR KLAUS ,  BUECHNER DR OSKAR ,  PFANNMUELLER DR HELMUT ,  URBAN DR FRIEDRICH

IPC: C08F10/00

Abstract: The improvement is obtained by using a polymerisation regulator of relatively high Cs no. (1.75 x 10-2 - 4 x 10-1), close control of the addition of vinyl ester and polymerisation initiator. The method is suitable for co-polymerisation of mixtures of 100 ppw. ethylene with 0.1 - 5.5 ppw. of a vinyl ester of a C2-C20 carboxylic acid at 150 - 350 degrees C and 1,500 - 4000 atmos. The reaction takes place in 2 steps. 1st step: 100 ppw. ethylene +0.1 - 2.5 ppw. vinyl ester +2-100 mol-ppm of a free-radical polymerisation initiator +0.01 - 1 ppw regulator. 2nd. step: 1.1 - 2 times the quantity of vinyl ester per 100 ppw ethylene +2-100 mol-ppm initiator +40 - 60% by wt. of the regulator used in the 1st. step.

公开(公告)号：DE1256887B

公开(公告)日：1967-12-21

申请号：DEB0084533

申请日：1965-11-17

Applicant: BASF AG

Inventor： HENSEL DR WALTER ,  BUECHNER DR OSKAR

IPC: C08K5/20 ,  C10L1/22 ,  C23F11/14