-
公开(公告)号：ES2063218T3
公开(公告)日：1995-01-01
申请号：ES90116196
申请日：1990-08-24
Applicant: BASF AG
Inventor： FOLLMANN HEINRICH , HOFFMANN DIETRICH , SLIWKA WOLFGANG DR
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.
-
公开(公告)号：DE59007616D1
公开(公告)日：1994-12-08
申请号：DE59007616
申请日：1990-08-24
Applicant: BASF AG
Inventor： FOLLMANN HEINRICH , HOFFMANN DIETRICH , SLIWKA WOLFGANG DR
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.
-
公开(公告)号：DE4121820A1
公开(公告)日：1993-01-07
申请号：DE4121820
申请日：1991-07-02
Applicant: BASF AG
Inventor： HOFFMANN DIETRICH , FREUNDSCHUH ULRICH
Abstract: Microcapsule dispersion contains (a) the microcapsule, (b) an inorganic protective colloid; and (c) 0.1-15 wt.% (based on solid content of the dispersion) of a water-soluble low mol. wt. salt which dissociates easily. Component (b) is partially or totally neutralised polymerisate of an unsatd. carboxylic acid and, opt., other monomers. Component (c) is a water soluble ammonium- or alkali(ne earth) salt of a strong acid. USE/ADVANTAGE - The dispersions can contain dyes, detergents, printing inks, perfumes, adhesives, medicaments, agrochemicals, fertilisers, fats, oils, nutrients, enzymes, liquid crystals, colourants, rust protectants, indicators, catalysts, chemical reactants and magnetic substances. They are stable and have low viscosit
-
-
公开(公告)号：FI884247A
公开(公告)日：1989-03-19
申请号：FI884247
申请日：1988-09-15
Applicant: BASF AG
Inventor： HOFFMANN DIETRICH , SENNINGER RUDOLF
-
Patent Agency Ranking
公开(公告)号：AU5566186A
公开(公告)日：1986-11-13
申请号：AU5566186
申请日：1986-04-04
Applicant: BASF AG
Inventor： HOFFMANN DIETRICH , SLIWKA WOLFGANG
-
公开(公告)号：DE3164205D1
公开(公告)日：1984-07-19
申请号：DE3164205
申请日：1981-10-08
Applicant: BASF AG
Inventor： HOFFMANN DIETRICH , SLIWKA WOLFGANG DR
IPC: B01J13/04 , B41M5/10 , B41M5/132 , B41M5/165 , C08G12/00 , C08G12/32 , D21H19/18 , D21H19/24 , B41M5/12 , B41M5/22
Abstract: A microcapsule-containing wax composition, which comprises (a) microcapsules of from 2 to 10 mu m diameter, (b) waxes and (c) dispersants, with or without pigments, fillers, volatile constituents and other agents conventionally present in wax compositions for the hot carbon process. The wall material of the microcapsules is a cross-linked urea-melamine condensate. The wax compositions may be applied over all or part of the surface of a base material, and give deeply colored copies with color-forming (CF) layers.
-
公开(公告)号：ES2214392T3
公开(公告)日：2004-09-16
申请号：ES01902297
申请日：2001-01-09
Applicant: BASF AG
Inventor： HOFFMANN DIETRICH , EISERMANN HERBERT
IPC: B01J13/20 , B41M5/165 , B01J13/18 , 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：DE3802270A1
公开(公告)日：1989-08-03
申请号：DE3802270
申请日：1988-01-27
Applicant: BASF AG
Inventor： RIEDEL GUENTHER DR , HOFFMANN DIETRICH , EISERMANN HERBERT
-
-
-
-
-
-
-
-
-
Search Results
42
records
(took 0.023 seconds)
