Preventing agglomeration of bitumen - particles

    公开(公告)号:DE1812095A1

    公开(公告)日:1970-06-11

    申请号:DE1812095

    申请日:1968-12-02

    Applicant: BASF AG

    Abstract: Particle mixts. contg. 20-200 penetration bitumen 100, ethylene polymer 1-200 and optionally up to 50 pts. by wt. of polyisobutylene are prevented from agglomerating or caking by treatment with an aq. dispersion contng. (a) 20-50 wt.% of finely divided polymer consisting of at least 60 wt.% of vinyl- or vinylidenechloride polymer units. (b) 4-20 wt.% to finely divided melamine, melamine- and/or urea-CH2O resin, such that the sum of the wt.% in (a) and (b) is less than 60. The product is then dried.

    47.
    发明专利
    未知

    公开(公告)号:ES2189247T3

    公开(公告)日:2003-07-01

    申请号:ES98947430

    申请日:1998-08-13

    Applicant: BASF AG

    Abstract: The invention relates to a continuous process for preparing aminoplastics and/or phenolics, in which a precondensate solution is prepared in a first extruder (14), the precondensate solution is continuously fed, with addition of additives, to a second extruder (20) with partial filling in the feed section (E) and devolatilization section (G), devolatilized in the second extruder (20) and then formed to give a molding composition or an end product. The process is particularly suitable for preparing melamine resins, in particular melamine-formaldehyde resins, as well as for preparing urea-formaldehyde resins.

    50.
    发明专利
    未知

    公开(公告)号:ES2149476T3

    公开(公告)日:2000-11-01

    申请号:ES96914971

    申请日:1996-04-22

    Applicant: BASF AG

    Abstract: A process is disclosed for producing filaments from a hydroxy- or aminoalkylmelamine-modified melamine/formaldehyde condensation product. The highly concentrated aqueous solution of a melamine/formaldehyde condensation product is filtered, extruded through a spinning nozzle, the extruded threads are dried in a dry shaft by means of hot air, and the dried threads are processed in a tempering furnace at temperatures that rise progressively up to a maximum temperature from 160 to 250 DEG C, thus hardening the pre-condensed product.

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