21.
    发明专利
    未知

    公开(公告)号:AT134682T

    公开(公告)日:1996-03-15

    申请号:AT91119991

    申请日:1991-11-23

    Applicant: BASF AG

    Abstract: A composite foam of low thermal conductivity comprises a) 20-80% by volume of silica aerogel particles having a mean diameter of from 0.1 to 20 mm and a density of from 0.08 to 0.40 g/cm3, b) 20-80% by volume of a styrene polymer foam which surrounds the particles of component a) and binds them to one another and has a density of from 0.01 to 0.15 g/cm3, and, if desired, c) conventional additives in effective amounts.

    22.
    发明专利
    未知

    公开(公告)号:AT111376T

    公开(公告)日:1994-09-15

    申请号:AT92121773

    申请日:1992-12-22

    Applicant: BASF AG

    Abstract: Shaped part based on supercritically dried silica aerogel parts in the form of spherical particles having diameters of from 0.1 to 10 mm or of sheet-like pieces having thicknesses of from 2 to 30 mm and diameters of from 1 to 5 cm, characterized in that the formed part is produced by pressing at temperatures in the range from 500 to 1000 DEG C and pressures of from 0.5 to 10 bar, under a protective gas such as nitrogen, if required, and without the addition of binders.

    Process for the surface-wise concentration of light and novel perylene-3,4,9,10-tetracarboxylic acid diimides

    公开(公告)号:DE3434059A1

    公开(公告)日:1985-03-14

    申请号:DE3434059

    申请日:1984-08-22

    Applicant: BASF AG

    Abstract: A process for the concentration of light in plastic sheets in which, as fluorescent centres, perylenetetracarboxylic acid diimides of the formula are used, the compounds (I) being prepared by chlorination of (I) where n = 0 with sulphuryl chloride in inert organic liquids in the presence of catalysts. In the formula, n denotes 2, 3, 4, 5 or 6 and R and R independently of one another denote a) linear or branched C1- to C18-alkyl which is optionally substituted by cyano, hydroxyl, cycloalkyl, alkylcarbonyloxy, alkenylcarbonyloxy or cycloalkylcarbonyloxy, where the alkyl chain can also be interrupted by O or S, or b) C5- to C18-cycloalkyl which is optionally substituted by alkyl, carboalkoxy or trifluoromethyl. Novel perylenetetracarboxylic acid diimides of the formula (I) in which n = 4 and R and R denote 3-(2'-ethylhexyloxy)-propyl, 2-ethylhexyl, butyl, octyl, tridecyl, octadecyl, 3-pinanylmethyl, 6-(2'-ethylhexanoyloxy)-6-methyl-2-heptyl, 4-methylcyclohexyl, 3,5-dimethylcyclohexyl, 2,6-dimethylcyclohexyl, 2,6-diisopropylcyclohexyl or norbornyl or R denotes C4- to C12-alkyl, cyclohexyl substituted by C1- to C4-alkyl, cyclohexyl-C1- or -C2-alkyl and R denotes 2-hydroxyethyl, C1- to C19-alkylcarbonyloxy-C2- to -C4-alkyl, C6- to C12-cycloalkyl carbonyloxy-C2- to -C4-alkyl or C2- to C4-alkenyl carbonyloxy-C2- to -C4-alkyl. Using the dyes (I) (lacuna) are obtained in ... Original abstract incomplete.

    30.
    发明专利
    未知

    公开(公告)号:DE59205582D1

    公开(公告)日:1996-04-11

    申请号:DE59205582

    申请日:1992-11-24

    Applicant: BASF AG

    Abstract: Process for the preparation of tertiary amine oxides with a low nitrosamine content by reacting a tertiary amine with an aqueous hydrogen peroxide solution, in which process the starting material used are tertiary amines whose primary and secondary amine content is not more than 0.05% by weight in total.

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