32.
    发明专利
    未知

    公开(公告)号:NO960820L

    公开(公告)日:1996-02-28

    申请号:NO960820

    申请日:1996-02-28

    Applicant: BASF AG

    Abstract: PCT No. PCT/EP94/02822 Sec. 371 Date Feb. 29, 1996 Sec. 102(e) Date Feb. 29, 1996 PCT Filed Aug. 25, 1994 PCT Pub. No. WO95/06617 PCT Pub. Date Mar. 9, 1995Hydrophobic silica aerogels obtainable by reacting a waterglass solution with an acid at a pH of from 7.5 to 11, substantially removing ionic constituents from the resulting silica hydrogels by washing with water or dilute aqueous solutions of inorganic bases, while the pH of the hydrogels is kept in the range from 7.5 to 11, displacing the aqueous phase contained in the hydrogel by an alcohol, and subsequent supercritical drying of the resulting alcogels.

    33.
    发明专利
    未知

    公开(公告)号:NO960820D0

    公开(公告)日:1996-02-28

    申请号:NO960820

    申请日:1996-02-28

    Applicant: BASF AG

    Abstract: PCT No. PCT/EP94/02822 Sec. 371 Date Feb. 29, 1996 Sec. 102(e) Date Feb. 29, 1996 PCT Filed Aug. 25, 1994 PCT Pub. No. WO95/06617 PCT Pub. Date Mar. 9, 1995Hydrophobic silica aerogels obtainable by reacting a waterglass solution with an acid at a pH of from 7.5 to 11, substantially removing ionic constituents from the resulting silica hydrogels by washing with water or dilute aqueous solutions of inorganic bases, while the pH of the hydrogels is kept in the range from 7.5 to 11, displacing the aqueous phase contained in the hydrogel by an alcohol, and subsequent supercritical drying of the resulting alcogels.

    35.
    发明专利
    未知

    公开(公告)号:ES2078068T3

    公开(公告)日:1995-12-01

    申请号:ES92924653

    申请日:1992-12-03

    Applicant: BASF AG

    Abstract: PCT No. PCT/EP92/02793 Sec. 371 Date Jun. 13, 1994 Sec. 102(e) Date Jun. 13, 1994 PCT Filed Dec. 3, 1992 PCT Pub. No. WO93/12182 PCT Pub. Date Jun. 24, 1993Luster pigments based on multiply coated plateletlike silicatic substrates, obtainable by further coating substrates already coated with a first layer comprising a colorless or selectively absorbing metal oxide a) initially with a second, nonselectively absorbing layer consisting essentially of carbon, a metal or a metal oxide, and b) if desired subsequently with a third layer comprising colorless or selectively absorbing metal oxide, wherefor the carbon layer (step a) is applied by thermal decomposition of oxygen-containing hydrocarbons that for every two carbon atoms contain at least one oxygen atom, the metal layer (step a) is applied by gas phase decomposition of volatile compounds of these metals in an inert gas, and the metal oxide layer (step a and/or b) is applied by gas phase decomposition of volatile compounds of these metals in the presence of oxygen, water vapor or mixtures thereof to the substrates coated in case a) with a first metal oxide layer and in case b) additionally with a nonselectively absorbing layer a), and also specific pigments and preparation and use of the luster pigments for coloring paints, printing inks, plastics, decorative cosmetic preparations, glasses and ceramic products.

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