公开(公告)号：DE19514318A1

公开(公告)日：1996-10-24

申请号：DE19514318

申请日：1995-04-18

Applicant: HOECHST AG

Inventor： WONNER JOHANN DR ,  SCHOLL FRANK ,  SAUER JOSEF DR ,  WOELFERT GUENTER

IPC: C07D251/54 ,  C07D251/70 ,  C07D401/04 ,  C07D401/14 ,  C08K5/3442 ,  C08K5/3477 ,  C09D201/00 ,  C09D201/02 ,  C09D7/12

公开(公告)号：DE4316540A1

公开(公告)日：1994-11-24

申请号：DE4316540

申请日：1993-05-18

Applicant: HOECHST AG

Inventor： JANSEN ROLF-MICHAEL DR ,  KESSLER BIRGIT ,  WONNER JOHANN DR ,  ZIMMERMANN ANDREAS DR

IPC: C08J9/28 ,  B01J13/00 ,  B01J21/08 ,  B01J32/00 ,  B01J37/03 ,  B01J37/34 ,  C01B33/158 ,  C01B33/16 ,  F26B3/34 ,  B29B13/06

Abstract: PCT No. PCT/EP94/01413 Sec. 371 Date Oct. 27, 1995 Sec. 102(e) Date Oct. 27, 1995 PCT Filed May 4, 1994 PCT Pub. No. WO94/26406 PCT Pub. Date Nov. 24, 1994Process for the preparation of aerogels by subcritical drying of inorganic and organic hydrogels and lyogels to give aerogels, dielectric drying methods being used.

公开(公告)号：DE19744942C1

公开(公告)日：1999-07-01

申请号：DE19744942

申请日：1997-10-10

Applicant: HOECHST AG

Inventor： DOERRIES PETER ,  WONNER JOHANN DR

IPC: C07D207/38 ,  C07D211/40 ,  C07D223/10 ,  C07D225/02 ,  C07D227/087 ,  C08G12/26 ,  C08L61/32 ,  D21H17/51 ,  C08K5/3412 ,  C08L61/28 ,  C08G14/02

Abstract: The preparation of N-alkoxymethyl-lactams by reaction of a lactam, formaldehyde and a hydroxyl group containing compound is novel. An N-alkoxymethyl-lactam (I) of formula (1) is formed by reaction of 1 mole of a lactam (II) of formula (2) with 1-4 moles of formaldehyde (III) and 0.5-6 moles of hydroxyl group containing compounds (IV) consisting of diols and/or diol monoether s of formula (3) or (4). (1) (2) (3) (4) X = -(OCH2-CR H)m - OR or -O-(CH2)n-OR R , R , R = H or 1-6C alkyl l = 3-12 m = 1-20 n = 2-8 Independent claims are included for (i) a process for the production of (I) by mixing (II), (III) and (IV) in a molar ratio of 1:4:0.5-6 in the presence of an acid catalyst at 50-200 degrees C in a single step. (ii) a mixture resulting from the process, containing (I), a N-methylol lactam of formula (5) and an N, N'-methylene bis lactam of formula (6) (iii) a melamine impregnating resin composition containing 1-20 wt.% (with respect to solid melamine resin), (I) or the mixture (ii) as a modifying agent. (5) (6)