公开(公告)号：DE3783554D1

公开(公告)日：1993-02-25

申请号：DE3783554

申请日：1987-09-17

Applicant: BASF AG

Inventor： DENZINGER WALTER ,  HARTMANN HEINRICH DR ,  GOECKEL ULRICH DR ,  RICHTER FELIX DR ,  RAUBENHEIMER HANS-JUERGEN ,  WINKLER EKHARD DR

IPC: C08F290/00 ,  C02F5/00 ,  C02F5/08 ,  C02F5/10 ,  C08F2/06 ,  C08F4/32 ,  C08F8/12 ,  C08F20/02 ,  C08F20/10 ,  C08F220/20 ,  C08F222/02 ,  C08F222/06 ,  C08F299/02

Abstract: New slightly crosslinked, water-soluble polymaleic acid (I) is obtd. by: (a) polymerising maleic anhydride (II) with 0.1-10 (wt.)% crosslinker (III) contg. at least 2 ethylenically unsatd. double bonds in an aromatic hydrocarbon (IV) at 60-200 deg.C in the presence of 1-20 wt.%, w.r.t. (II), of a peroxy-ester (V) derived from satd. or ethylenically unsatd. carboxylic acids; and (b) hydrolysing the polymer contg. anhydride gps. to (I) with a Fikentscher K value of 7-20 (measured at 25 deg.C in aq. soln. at pH 7 as Na salt and a (I) concn. of 5%). (I) is pref. prepd. as described above, pref. using 0.2-5% (III) and 5-16% (V) w.r.t. (II). (III) is pref. a di(meth)acrylate of a satd. di- or poly-ol; a polyethylene or polypropylene glycol di(meth)acrylate with mol.wt. 200-9000; a vinyl ester of an ethylenically unsatd. 3-6C carboxylic acid; a vinyl ester of a satd. di- or poly-carboxylic acid; a di- or poly-vinyl ether of a di- or poly-ol; an allyl ester of an ethylenically unsatd. carboxylic acid; an allyl ether of polyols; methylenebis(meth)acrylamide; divinylethyleneurea; divinylpropyleneurea; DVB; and/or divinyldioxane; esp. a 2-6C alkylene di(meth)acrylate; or a polyethylene and/or polypropylene di(meth)acrylate with mol.wt. 400-2000. (IV) is benzene, toluene, xylene, ethylbenzene, diethylbenzene, isopropylbenzene and/or diisopropylbenzene. (V) is tert.-butyl per-2-ethylhexanoate (VA), tert.-butyl perpivalate and/or tert.-butyl perbenzoate.

公开(公告)号：AT72229T

公开(公告)日：1992-02-15

申请号：AT88105376

申请日：1988-04-02

Applicant: BASF AG

Inventor： BAUR RICHARD DR ,  RICHTER FELIX DR ,  BIRNBACH STEFAN DR ,  FIKENTSCHER ROLF DR ,  OFTRING ALFRED DR ,  WINKLER EKHARD DR

IPC: C11D3/26 ,  C07C67/00 ,  C07C229/22 ,  C07C229/32 ,  C07C231/00 ,  C07C231/12 ,  C07C237/06 ,  C07C253/00 ,  C07C255/18 ,  C07C255/24 ,  C09K3/00 ,  C11D3/33 ,  C11D3/39

公开(公告)号：AT68795T

公开(公告)日：1991-11-15

申请号：AT88102526

申请日：1988-02-20

Applicant: BASF AG

Inventor： BAUR RICHARD DR ,  FIKENTSCHER ROLF DR ,  OFTRING ALFRED DR ,  RICHTER FELIX DR ,  TRIESELT WOLFGANG DR ,  DIESSEL PAUL ,  WINKLER EKHARD DR ,  PERNER JOHANNES DR

IPC: C11D3/20 ,  C07C41/00 ,  C07C41/50 ,  C07C43/30 ,  C07C67/00 ,  C08G4/00 ,  C08G16/02 ,  C09K3/00 ,  C11D3/37

公开(公告)号：DE3712329A1

公开(公告)日：1988-10-20

申请号：DE3712329

申请日：1987-04-11

Applicant: BASF AG

Inventor： BAUR RICHARD DR ,  RICHTER FELIX DR ,  BIRNBACH STEFAN DR ,  FIKENTSCHER ROLF DR ,  OFTRING ALFRED DR ,  WINKLER EKHARD DR

IPC: C11D3/26 ,  C07C67/00 ,  C07C229/22 ,  C07C229/32 ,  C07C231/00 ,  C07C231/12 ,  C07C237/06 ,  C07C253/00 ,  C07C255/18 ,  C07C255/24 ,  C09K3/00 ,  C11D3/33 ,  C11D3/39 ,  C07C121/453 ,  C07C101/30 ,  C07C99/00

Abstract: Serine-N,N-diacetic acid and derivatives thereof are prepared in various ways and used in particular as complexing agents, bleaching agent stabilizers and builders in detergents.

公开(公告)号：DE3631814A1

公开(公告)日：1988-03-31

申请号：DE3631814

申请日：1986-09-19

Applicant: BASF AG

Inventor： DENZINGER WALTER ,  HARTMANN HEINRICH DR ,  GOECKEL ULRICH DR ,  RICHTER FELIX DR ,  RAUBENHEIMER HANS-JUERGEN ,  WINKLER EKHARD DR

IPC: C08F290/00 ,  C02F5/00 ,  C02F5/08 ,  C02F5/10 ,  C08F2/06 ,  C08F4/32 ,  C08F8/12 ,  C08F20/02 ,  C08F20/10 ,  C08F220/20 ,  C08F222/02 ,  C08F222/06 ,  C08F299/02 ,  C08F267/04 ,  C08F22/06

Abstract: Slightly crosslinked, water-soluble polymaleic acid which is obtainable by polymerization of maleic anhydride with from 0.1 to 10% by weight of a crosslinking agent in an aromatic hydrocarbon at from 60 DEG to 200 DEG C. in the presence of from 1 to 20% by weight, based on maleic anhydride, of a peroxyester, and hydrolysis of the polymer to give slightly crosslinked polymaleic acid having a Fikentscher K value of from 8 to 20 (measured at 20 DEG C. in 5% strength aqueous solution at pH 7 as the Na salt), a process for the preparation of slightly crosslinked polymaleic acid, and its use as a water treatment agent for reducing boiler scale and hard water deposits in water-conveying systems.