公开(公告)号：DE59301458D1

公开(公告)日：1996-02-29

申请号：DE59301458

申请日：1993-10-14

Applicant: BASF AG

Inventor： DECKERS ANDREAS DR ,  WAGNER DANIEL DR ,  STRAUB FERDINAND DR ,  ZIMMER GUENTER DR ,  ENDLICH KARL-LUDWIG

IPC: C08J7/04 ,  C08L33/12 ,  C09D133/12 ,  C09D151/04

Abstract: Mixtures comprising (A) from 80 to 99% by weight of a polymer based on methyl methacrylate, (B) from 20 to 1% by weight of a particulate polymer having a weight-average value (Mw) of the particle diameter which is in the range from 1-50 mu m, obtainable by polymerisation of a monomer which contains vinyl groups, and (C) from 0 to 60% by weight of a multistage graft rubber based on an ester of acrylic acid or on butadiene for the preparation of rough coating compositions.

公开(公告)号：DE4322021A1

公开(公告)日：1995-01-12

申请号：DE4322021

申请日：1993-07-02

Applicant: BASF AG

Inventor： DECKERS ANDREAS DR ,  BESECKE SIEGMUND DR ,  ENDLICH KARL-LUDWIG

IPC: C08F2/20 ,  C08F2/42 ,  C08F4/32 ,  C08F4/36 ,  C08F220/12

Abstract: Bead polymers comprising 80 to 99 % by weight of at least one C1-C18-alkyl ester of methacrylic acid and 1 to 20 % by weight of at least one C1-C18-alkyl ester of acrylic acid, obtainable by polymerisation, at a temperature between 100 and 140 DEG C which is approximately constant over the majority of the polymerisation time, by means of an initiator system comprising at least two peroxidic initiators I having different decomposition temperatures T, at which in each case half of the initiator has decomposed after 1 hour, wherein - the initiator Imin having the lowest decomposition temperature has a decomposition temperature Tmin in the range from 60 to 100 DEG C, - the initiator Imax having the highest decomposition temperature has a decomposition temperature Tmax in the range from 100 to 140 DEG C, the difference between Tmax and Tmin is greater than 10 DEG C, and Imax is a perketal of the formula (I) in which the radicals R and R are identical or different alkyl radicals having 1 to 5 carbon atoms, where R and R can be connected to form a 5- or 6-membered ring, and R is a tert-butyl or tert-amyl radical, and - further initiators In, which can be used if desired and have decomposition temperatures Tn between Tmin and Tmax, in the presence of a protective colloid, with the proviso that from 20 to 80 % by weight of the C1-C18-alkyl ester of acrylic acid is only added after a conversion in the range from 20 to 80 %, based on the amount of monomer employed at the beginning.

公开(公告)号：DE4320660A1

公开(公告)日：1995-01-05

申请号：DE4320660

申请日：1993-06-22

Applicant: BASF AG

Inventor： DECKERS ANDREAS DR ,  SCHATZ WOLFGANG DR ,  ENDLICH KARL-LUDWIG ,  ZIMMER GUENTER DR

IPC: C08F2/00 ,  C08F2/18 ,  C08F2/20 ,  C08F20/02 ,  C08F20/06 ,  C08F20/12 ,  C09K23/52 ,  C08F20/10 ,  B01F17/52

Abstract: The reduction in wall deposits in reaction containers (reactors) in the suspension polymerisation of monomers containing acrylic and/or methacrylic groups, and the use of a buffer and a dispersant to reduce wall deposits in reaction containers in the suspension polymerisation of monomers containing acrylic and/or methacrylic groups.

公开(公告)号：DE4237209A1

公开(公告)日：1994-05-05

申请号：DE4237209

申请日：1992-11-04

Applicant: BASF AG

Inventor： DECKERS ANDREAS DR ,  WAGNER DANIEL DR ,  STRAUB FERDINAND DR ,  ZIMMER GUENTER DR ,  ENDLICH KARL-LUDWIG

IPC: C08J7/04 ,  C08L33/12 ,  C09D133/12 ,  C09D151/04 ,  C09D5/28 ,  C09D157/00 ,  C09D151/00

Abstract: Mixtures comprising (A) from 80 to 99% by weight of a polymer based on methyl methacrylate, (B) from 20 to 1% by weight of a particulate polymer having a weight-average value (Mw) of the particle diameter which is in the range from 1-50 mu m, obtainable by polymerisation of a monomer which contains vinyl groups, and (C) from 0 to 60% by weight of a multistage graft rubber based on an ester of acrylic acid or on butadiene for the preparation of rough coating compositions.