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    Aq. dispersions of polymeric pigments - with high light diffraction power, prepd. by stepwise emulsion polymerisation of specified mono:olefinic monomer mixts., used for paper coating
    1.
    发明专利
    Aq. dispersions of polymeric pigments - with high light diffraction power, prepd. by stepwise emulsion polymerisation of specified mono:olefinic monomer mixts., used for paper coating 未知

    公开(公告)号：DE4034605A1

    公开(公告)日：1992-05-07

    申请号：DE4034605

    申请日：1990-10-31

    Applicant: BASF AG

    Inventor： SCHWARZENBACH ELMAR DR ,  WISTUBA ECKEHARDT DR ,  HANCIOGULLARI HARUTYUN DR ,  BRAUN HANS-GEORG DR ,  NISSLER HARALD DR

    IPC: C08F285/00 ,  C08F291/00

    Abstract: Aq. dispersions (I), obtainable by specified stepwise emulsion polymerisation in aq. phase using an emulsifier, are claimed. The steps comprise (A) polymerisation, in 1 or more stages, of comonomer mixt. comprising (1a) 1-50% (all pts. wt.) 1 or more mono-olefinic monomer (Monomers I) which (a) contain at least 1 OH gp. in mol. (Monomers Ia) or (b) contain functional gps. convertible into hydrophilic gps. through selective chemical conversion (Monomers Ib) or (c) are N-vinylpyrrolidone, N-vinylcaprolactam, oligomer or polymer of these, or of formula (1) or (2) (Monomers (Ic). (2a) 40-99% 1 or more non-hydrophilic mono-olefinically unsatd. monomers (Monomers II) different from Monomers Ia, Ib and Ic, and (3a) 0-20% 1 or more polyolefinically unsatd. monomers (Monomers III) to form seed polymer. (B) polymerisation in 1 or more stages of monomer mixt. different from comonomre mixt. in (A), comprising (1b) 0-10 % 1 or more Monomers I (2b) 40-99% 1 or more Monomers II (3b) 1-50 % 1 or more Monomers III (4b) 0-10% 1 or more monomers with acid gps. (Monomers IV) in presence of seed polymer from (A) until average particle size 300-3000 nm is obtd.. In formulae (1) and (2) R1 = H or Me; R2 = H or 1-6C alkyl; R3 = 1-6C alkyl, aryl, or -C(O)-R4, where R4 = 1-6C alkyl, or aryl; n = 1 or 2; n = 1-150. Opt., when Monomer Ib has been used, prepn. also comprises (C) swelling particles obtd. by (A) and (B) through converting gps. introduced by means of Monomer Ib through selective chemical conversion into corresp. hydrophilic gps. at temp. above glass transition temp. of polymer of step (A). USE/ADVANTAGE - Aq. colour coating compsns., in industrial applications such as paper coating where they serve as part of binder, replacement of opacifying pigments such as TiO2 and clay in, e.g., phenoplast and aminoplast formulations, partic. contg. urea-HCHO or melamine-HCHO condensation prods., and water-dispersible alkyd resins. (I) are obtd. in more reproducible manner. Films have high opacity. Process avoids incompatibility through polymers of stage (A) and stage (B). (0/0)

    3.
    发明专利
    未知

    公开(公告)号：DE3784225D1

    公开(公告)日：1993-03-25

    申请号：DE3784225

    申请日：1987-12-03

    Applicant: BASF AG

    Inventor： NAEGELE DIETER DR ,  NISSLER HARALD DR

    IPC: B41M5/26 ,  G11B7/24 ,  G11B7/244 ,  G11B7/245 ,  G11B7/248 ,  G11B7/253 ,  G11B7/26

    Abstract: Flat laminated laser-optical recording material has an amorphous, thermally-modifiable, electroconductive recording layer, which contains dyestuff (I) and polymer (II) bound to one another through ionic bonds. (I) is anionic, pref. with carboxylate, phosphonate, O-phosphate, O-sulphate or sulphonate gps., esp. a phthalocyanine, porphin, tetraazaporphin, hemiporphyrazine or tetrathiolato metal complex deriv.. (II) is cationic, pref. with ammonium, imonium, sulphonium or phosphonium gps. and/or a positively charged bond system of several conjugated double bonds, esp. a pyrrole or thiophene homo- or copolymer or an aniline homopolymer.

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