公开(公告)号：DE2000501A1

公开(公告)日：1971-07-15

申请号：DE2000501

申请日：1970-01-07

Applicant: BASF AG

Inventor： GULBINS ERICH DR ,  HAUSS ALFRED DR ,  KIEFERLE FRIEDRICH DR ,  KOVACS JENOE DR

IPC: C08F2/16 ,  C08F14/08 ,  C08F18/08 ,  C08F214/06 ,  C08F3/02

公开(公告)号：DE1720328B1

公开(公告)日：1972-08-31

申请号：DE1720328

申请日：1967-11-29

Applicant: BASF AG

Inventor： OSCHMANN WERNER DR ,  GREGER RICHARD DR ,  HAUSS ALFRED DR ,  WINTER GERNOT DR

IPC: C08F14/06 ,  C08F3/30

公开(公告)号：DE2212962A1

公开(公告)日：1973-09-20

申请号：DE2212962

申请日：1972-03-17

Applicant: BASF AG

Inventor： DEUSCHEL WALTER DR ,  GULBINS ERICH DR ,  HAUSS ALFRED DR ,  LAUSBERG DIETRICH DR ,  SIGMUND WILHELM DR

IPC: C08F14/00 ,  C08F2/00 ,  C08F2/18 ,  C08F14/06 ,  C08F3/30

Abstract: 1414714 Suspension polymerization BADISCHE ANILIN- & SODA-FABRIK AG 16 March 1973 [17 March 1972] 12765/73 Heading C3P In the polymerization of vinyl chloride, optionally with up to 30% by weight of one or more comonomers, in aqueous suspension in the presence of a free-radical initiator and a watersoluble protective colloid in a stirred reactor, the polymerization mixture is heated to the desired polymerization temperature in a heat-up stage which constitutes not more than one third of the time required for the full polymerization cycle, whereupon polymerization is carried out in a polymerization stage at a substantially constant temperature, while (a) using one or more free-radical initiators having a half-life at 50‹ C. of less than 10 hours, (b) maintaining the polymerization mixture at a pH of less than 8 during the heat-up stage, and (c) maintaining the temperature of the reactor walls at not more than 20‹ C. above the temperature of the polymerization mixture during the heat-up stage and maintaining the temperature of the reactor walls at a lower value than that of the polymerization mixture during the polymerization stage. At least 30% of the monomers are grafted on to the protective colloid in the heat up stage.

公开(公告)号：DE1720317A1

公开(公告)日：1971-06-16

申请号：DE1720317

申请日：1967-10-17

Applicant: BASF AG

Inventor： WINTER GERNOT DR ,  SCHOTT OTTO DR ,  HAUSS ALFRED DR

IPC: C08F291/00 ,  C08F3/30

公开(公告)号：DE2041372A1

公开(公告)日：1972-02-24

申请号：DE2041372

申请日：1970-08-20

Applicant: BASF AG

Inventor： GULBINS ERICH DR ,  HAUSS ALFRED DR ,  OSCHMANN WERNER DR ,  KOVACS JENOE DR

IPC: C08F14/06 ,  C08F3/30

Abstract: Vinyl chloride is (co)polymerised in aq. suspension, in presence of a free-radical initiator and a mixture of 0.001-0.02 pts. wt. (w.r.t. 100 pts. of monomer(s)) of a high molecular cellulose deriv. (e.g. oxypropylated cellulose ether) having a viscosity 50 cP with 0.0001-0.02 pts. wt. of an extremely high molecular cellulose deriv. having viscosity >1000 cP, as protective colloids,. Resulting polymer has fine granules with good plasticiser absorption and apparent density. There is no need to increase concn. of suspension stabilisers during reaction which may lead to the impairment of electrical props. of the polymer. Protective colloid mixture has good stability.

公开(公告)号：DE1669653A1

公开(公告)日：1971-05-06

申请号：DE1669653

申请日：1966-06-29

Applicant: BASF AG

Inventor： DISTLER HARRY DR ,  HAUSS ALFRED DR ,  POHLEMANN HEINZ DR ,  STANGER BERND DR

IPC: C08K5/36 ,  C08F29/18