公开(公告)号：DE3921145A1

公开(公告)日：1991-01-10

申请号：DE3921145

申请日：1989-06-28

Applicant: BASF AG

Inventor： WILL HELMUT ,  HOFFMANN DIETRICH

IPC: C14C11/00

Abstract: Leather surfaces are rendered matt by applcn. of a coating agent, as a soln. in an organic solvent or an aq. dispersion, and drying. The coating agent contains micro-capsules with particle size 2-50 microns as matting agent. USE/ADVANTAGE - The matt surface is retained after mechanical treatment of the leather, e.g. after polishing. A level, full-bodied leather surface is obtd. Materials other than leather, e.g. paper, textiles, wood, minerals, metals or synthetics, can be rendered matt by use of the micro-capsules. Use of micro-capsules of size 2-50 microns as matting agent in primers and/or dressings for finishing leather is claimed.

公开(公告)号：FI884247A0

公开(公告)日：1988-09-15

申请号：FI884247

申请日：1988-09-15

Applicant: BASF AG

Inventor： HOFFMANN DIETRICH ,  SENNINGER RUDOLF

IPC: C10L1/14 ,  C10L1/00 ,  C10L

公开(公告)号：FI861265A

公开(公告)日：1986-10-07

申请号：FI861265

申请日：1986-03-25

Applicant: BASF AG

Inventor： HOFFMANN DIETRICH ,  SLIWKA WOLFGANG

IPC: B41M5/124 ,  B01J

公开(公告)号：FI861265A0

公开(公告)日：1986-03-25

申请号：FI861265

申请日：1986-03-25

Applicant: BASF AG

Inventor： HOFFMANN DIETRICH ,  SLIWKA WOLFGANG

IPC: B41M5/124 ,  B01J

公开(公告)号：TR200400589T4

公开(公告)日：2004-06-21

申请号：TR200400589

申请日：2001-01-09

Applicant: BASF AG

Inventor： HOFFMANN DIETRICH ,  EISERMANN HERBERT

IPC: B01J13/20 ,  B01J13/18 ,  B41M5/165 ,  C08G12/06 ,  C08G12/32 ,  C08G12/36 ,  C08G12/42 ,  C08L61/28 ,  C09D11/02 ,  C09K23/00 ,  D21H21/54

Abstract: Described is a process for preparing a dispersion of microcapsules by condensing a partially methylated melamine-formaldehyde resin having a molar ratio of melamine:formaldehyde:methanol of from 1:3.0:2.0 to 1:6.0:4.0 in water in which the essentially water-insoluble material forming the capsule core is present in dispersion in the presence of an alkali metal salt of a homopolymer or copolymer of 2-acrylamido-2-methylpropanesulfonic acid as protective colloid at a pH of from 3 to 6.5 by preforming the microcapsules at a temperature of from 20 to 50° C. and then curing the capsule wall of the preformed microcapsules at >50 to 100° C., which comprises adding from 5 to 100% by weight of melamine, based on the melamine-formaldehyde resin, in the course of curing. The microcapsule dispersions are formaldehyde-reduced and of low viscosity.

公开(公告)号：BR0107475A

公开(公告)日：2002-10-08

申请号：BR0107475

申请日：2001-01-09

Applicant: BASF AG

Inventor： HOFFMANN DIETRICH ,  EISERMANN HERBERT

IPC: B01J13/18 ,  B01J13/20 ,  B41M5/165 ,  C08G12/06 ,  C08G12/32 ,  C08G12/36 ,  C08G12/42 ,  C08L61/28 ,  C09D11/02 ,  C09K23/00 ,  D21H21/54

Abstract: Described is a process for preparing a dispersion of microcapsules by condensing a partially methylated melamine-formaldehyde resin having a molar ratio of melamine:formaldehyde:methanol of from 1:3.0:2.0 to 1:6.0:4.0 in water in which the essentially water-insoluble material forming the capsule core is present in dispersion in the presence of an alkali metal salt of a homopolymer or copolymer of 2-acrylamido-2-methylpropanesulfonic acid as protective colloid at a pH of from 3 to 6.5 by preforming the microcapsules at a temperature of from 20 to 50° C. and then curing the capsule wall of the preformed microcapsules at >50 to 100° C., which comprises adding from 5 to 100% by weight of melamine, based on the melamine-formaldehyde resin, in the course of curing. The microcapsule dispersions are formaldehyde-reduced and of low viscosity.

公开(公告)号：DE10000621A1

公开(公告)日：2001-07-12

申请号：DE10000621

申请日：2000-01-10

Applicant: BASF AG

Inventor： HOFFMANN DIETRICH ,  EISERMANN HERBERT

IPC: B01J13/18 ,  B01J13/20 ,  B41M5/165 ,  C08G12/06 ,  C08G12/32 ,  C08G12/36 ,  C08G12/42 ,  C08L61/28 ,  C09D11/02 ,  C09K23/00 ,  D21H21/54 ,  D21H17/47

Abstract: A method is disclosed for the production of a dispersion of microcapsules, by condensation of a partly methylated melamine-formaldehyde resin, with a molecular ratio of melamine:formaldehyde:methanol of from 1:3.0:2.0 to 1:6.0:4.0, in water, in which the essentially water-insoluble, capsule core forming material is dispersed, in the presence of an a alkali metal salt of a homo- or co-polymer of 2-acrylamido-2-methylpropansulphonic acid, at a pH-value of from 3 to 6.5, by pre-forming the micro-capsules at a temperature of from 20 to 50 DEG C and subsequent hardening of the capsule wall of the pre-formed microcapsules at > 50 to 100 DEG C. The method is characterised in that 5 to 100 wt. % of melamine, based on the melamine-formaldehyde resin, is added during the hardening. The microcapsule dispersions are of reduced formaldehyde content and of low viscosity.

公开(公告)号：DE19959806A1

公开(公告)日：2001-06-13

申请号：DE19959806

申请日：1999-12-11

Applicant: BASF AG

Inventor： EKKEHARD JAHNS ,  HOFFMANN DIETRICH

IPC: B01J13/18 ,  B41M5/42 ,  B41M5/28

Abstract: Microcapsules have a core of lipophilic substance(s) with a solid-liquid phase transition in the 40-120 deg C range and a polymer shell. Independent claims are also included for: (a) the production of such microcapsules; (b) the microcapsules produced by this process.

公开(公告)号：DE4225863A1

公开(公告)日：1994-02-10

申请号：DE4225863

申请日：1992-08-05

Applicant: BASF AG

Inventor： HOFFMANN DIETRICH ,  SCHULER BERNHARD DR

IPC: B41M5/30 ,  B41M5/323 ,  B41M5/333 ,  B41M5/337 ,  B41M5/28 ,  B41M5/26 ,  B41M5/40

Abstract: Thermosensitive recording materials containing at least one optionally polymer-coated colour former (chromogen), an optionally polymer-coated colour developer and a polymer-coated development auxiliary.

公开(公告)号：DE3929052A1

公开(公告)日：1991-03-07

申请号：DE3929052

申请日：1989-09-01

Applicant: BASF AG

Inventor： FOLLMANN HEINRICH ,  HOFFMANN DIETRICH ,  SLIWKA WOLFGANG DR

IPC: C08J3/03 ,  C08G12/32 ,  C08G12/38 ,  C08G12/40 ,  C08G12/42 ,  C08J3/12 ,  C08L61/20 ,  C08L61/28

Abstract: A process for the preparation of spherical, hard, mono- or oligodisperse particles having a diameter of from 0.1 to 100 mu m, by condensation of partially etherified melamine-formaldehyde precondensates which are infinitely soluble in water to give a clear solution, in an aqueous solution of a water-soluble polymer which carries highly acidic groups and has a K value of from 100 to 160, at pH 3 to 6 and at from 20 to 100 DEG C, and condensing the resultant turbid solution until the precondensate has been consumed, giving a dispersion of the particles. The dispersion is neutralised. The particles can be used in the form of the aqueous dispersion or after isolation from the dispersion. … The particles are spherical, hard, non-swellable particles which can be used, for example, as sizes for plastics, polishes, flatting (matting) agents, extruders and/or as pigments. … The process allows the targeted preparation of particles of a prespecified size and particle size distribution.