公开(公告)号：DE59404482D1

公开(公告)日：1997-12-04

申请号：DE59404482

申请日：1994-08-19

Applicant: BASF AG

Inventor： RUEHL THOMAS DR ,  HENKELMANN JOCHEM DR ,  HEIDER MARC DR

IPC: C07C231/08 ,  C07C233/05 ,  C07C233/58 ,  C07C233/65 ,  C07D207/26 ,  C07D207/263 ,  C07D223/10 ,  C07D207/267

Abstract: N-alkenylcarboxylic acid amides of formula HR C=CRN(R )C(O)R (I) are prepd. from carboxylic acid alkenyl esters of formula HR C=CR OC(O)R (II) and a carboxamide of formula HNR NC(O)R (III), by reaction in presence of a base. In formulae, R = one is H and the other is H or 1-4 C alkyl; R = (cyclo)aliphatic, araliphatic or aromatic gp., which may form a 3-10-member bridge with R ; R = H, or a (cyclo)aliphatic or aromatic gp.; and R = H or a (cyclo)aliphatic or aromatic gp. Pref. N-vinylpyrrolidone or N-vinylcaprolactam are prepd. Reaction is at 20-80 degrees C, without a solvent, using a tert. amine or Na methylate, K tert.butylate or K2CO3 as base. The amt. of base is 0.2-1 equivs. w.r.t. 1 equiv. of amide (III).

公开(公告)号：DE19649998A1

公开(公告)日：1997-06-19

申请号：DE19649998

申请日：1996-12-03

Applicant: BASF AG

Inventor： KROENER HUBERTUS DR ,  FRIEDRICH HOLGER DR ,  HEIDER MARC DR ,  GERST MATTHIAS DR

IPC: C07F7/18

Abstract: The preparation of compounds of formula CH2=CH-O-X-CH2CH2SiRy(OR')3-y (I) comprises reacting divinyl ethers of formula CH2=CH-O-X-CH=CH2 (II) with silanes of formula HSiRy(OR')3-y (III) at 70 - 150 deg C in the presence of a homogeneous hydrosilation catalyst. The catalyst is a platinum or rhodium compound, and the amount of Rh or Pt is 0.05 - 10 ppm with respect to (II and (III). R, R' = 1-6C alkyl or 6-10C aryl; X = 1-20C hydrocarbon, optionally substituted by halo and/or containing O atoms; and y = 0 - 2.

公开(公告)号：DE19509362A1

公开(公告)日：1996-09-19

申请号：DE19509362

申请日：1995-03-15

Applicant: BASF AG

Inventor： SCHMIDT-RADDE MARTIN DR ,  HEIDER MARC DR ,  DAMS ALBRECHT DR ,  RUST HARALD

IPC: C07D207/26 ,  C07D207/267 ,  C07D211/76 ,  C07D223/10 ,  C07B43/06

Abstract: Prepn. of N-vinyl-lactams (I) of formula (A) (where R = CH=CH2; n=1-3) comprises reacting lactams (II) of formula (A) (where R = H; n = 1-3) with (a) 10-90 wt.% aq. alkali hydroxide soln. by distn. at 50-250 degrees C and 1-100 mbar with a residence time of 0.1-5 hrs. and then (b) C2H2 at 60-250 degrees C and 1-100 bar. Pref. reaction (a) is carried out in a column with at least 2 theoretical plates. (II) and aq. alkali hydroxide soln. are fed into the upper third of the column. A 30-60, esp. 45-55 wt.% soln., more esp. KOH soln., is used. Reaction is carried out at 70-180 degrees C and 1-30 mbar with a residence time of 0.5-2 hrs.

公开(公告)号：DE4428901A1

公开(公告)日：1996-02-22

申请号：DE4428901

申请日：1994-08-19

Applicant: BASF AG

Inventor： RUEHL THOMAS DR ,  HENKELMANN JOCHEM DR ,  HEIDER MARC DR ,  FIECHTER BERND

IPC: C07C231/14 ,  C07C231/08 ,  C07C231/12 ,  C07C233/03 ,  C07C233/04 ,  C07C233/05 ,  C07C233/58 ,  C07C233/65

公开(公告)号：DE4428303A1

公开(公告)日：1996-02-15

申请号：DE4428303

申请日：1994-08-10

Applicant: BASF AG

Inventor： RUEHL THOMAS DR ,  HEIDER MARC DR ,  HENKELMANN JOCHEM DR ,  RAHN RALF-THOMAS DR ,  RUST HARALD

IPC: C07C67/54 ,  C07C69/01 ,  C07C69/06 ,  C07C69/07

Abstract: Recovery of pure vinyl formate (I) by distn. to separate by-prodn. from synthesis is carried out in two stages, HCOOH and water being sepd. in stage one and CH3CHO in stage two.

公开(公告)号：DE4328817A1

公开(公告)日：1995-03-02

申请号：DE4328817

申请日：1993-08-27

Applicant: BASF AG

Inventor： DENZINGER WALTER ,  HARTMANN HEINRICH DR ,  POTTHOFF-KARL BIRGIT DR ,  BUECHNER KARL-HEINZ ,  HEIDER MARC DR ,  RAUBENHEIMER HANS-JUERGEN

IPC: C02F1/04 ,  C02F5/10 ,  C08F8/00 ,  C08F16/16 ,  C08F210/00 ,  C08F212/00 ,  C08F216/14 ,  C08F218/02 ,  C08F218/06 ,  C08F220/00 ,  C08F220/04 ,  C08F220/08 ,  C08F222/06 ,  C09K8/528 ,  C08F222/04 ,  C08F222/02 ,  C23F14/00

Abstract: PCT No. PCT/EP94/02721 Sec. 371 Date Feb. 20, 1996 Sec. 102(e) Date Feb. 20, 1996 PCT Filed Aug. 16, 1994 PCT Pub. No. WO95/06074 PCT Pub. Date Mar. 2, 1995Water-soluble copolymerizates are disclosed containing carboxyl groups, and also containing the following components incorporated by polymerization: (a) 30 to 80 mol % monoethylenically unsaturated C3-C8 carboxylic acids, anhydrides thereof and/or water-soluble salts thereof; (b) 10 to 50 mol % C2-C8 olefines, styrene, alkyl styrene, C1-C10 alkyl vinyl ethers and/or vinyl esters of saturated C1-C10 monocarboxylic acids; and (c) 0.01 to 20 mol % vinyl ethers and/or allyl ethers of alkoxylated C1-C30 alcohols. The copolymerizates in question have a K-value of at least 8 (determined after H. Fikentscher). Also disclosed are methods of producing the water-soluble copolymerizates by copolymerization of the monomers in the presence of radical-forming polymerization initiators, and the use of the polymerizates as scale inhibitors.