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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
    61.
    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)

    65.
    发明专利
    未知

    公开(公告)号：DE3809920A1

    公开(公告)日：1989-10-05

    申请号：DE3809920

    申请日：1988-03-24

    Applicant: BASF AG

    Inventor： LEY GREGOR DR ,  SCHULTZE WOLFGANG ,  VINKE JOHANNES DR ,  WISTUBA ECKEHARDT DR

    IPC: C09D133/08 ,  C04B26/04 ,  C08F2/16 ,  C08F20/16 ,  C08F20/18 ,  C08F220/16 ,  C08F220/18 ,  C09D133/04 ,  C09D133/06

    Abstract: Coating compositions based on synthetic resin which contain as the binders, polymers built up from A) from 60 to 100% by weight of a tert.-butyl ester of an alpha - beta -ethylene unsaturated carboxylic acid or dicarboxylic acid having up to 5 carbon atoms or of a mixture of such tert.-butyl esters, B) from 0 to 40% by weight of an acrylate or methacrylate of a non-tertiary C1-C20-alkanol or a mixture of these monomers, C) from 0 to 20% by weight of vinyl chloride, vinyl acetate and/or vinyl propionate, the amounts mB and mC of the monomers B and C complying with the relationship mC

    67.
    发明专利
    未知

    公开(公告)号：DE3733340A1

    公开(公告)日：1989-04-13

    申请号：DE3733340

    申请日：1987-10-02

    Applicant: BASF AG

    Inventor： KRAUSE HANS-JOACHIM DR ,  LEIB GERNOT ,  SCHWEIGGER ENRIQUE DR ,  WISTUBA ECKEHARDT DR

    IPC: C08F2/26 ,  C08F4/30 ,  C08F6/06 ,  C08F6/22 ,  C08F212/00 ,  C08F212/08 ,  C08F220/10 ,  C08F220/18 ,  C08F265/04 ,  C08J3/16 ,  C09D7/00 ,  C09D7/12 ,  C09D133/04

    Abstract: The thickening agent (thickener) for physically drying paints and coatings which contain binders which are soluble in white spirit is a copolymer which forms a gel in white spirit and contains (a) from 7 to 15% by weight of acrylates and/or methacrylates of monoalkanols having 8 carbon atoms, (b) from 0.05 to 0.2% by weight of a crosslinking agent, (c) from 25 to 35% by weight of styrene and (d) from 49.8 to 67.95% by weight of at least one acrylate and/or methacrylate of monoalkanols having 4 carbon atoms, in copolymerised form, with the proviso that the total of the % by weight for (a) to (d) is always 100. The thickener is prepared by emulsion polymerisation of the parent monomers in the presence of alkylsulphonates as emulsifier.

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