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    2.
    发明专利
    未知

    公开(公告)号：DE19757700A1

    公开(公告)日：1999-06-24

    申请号：DE19757700

    申请日：1997-12-23

    Applicant: BASF AG

    Inventor： BALK ROELOF DR ,  GRAALMANN ONNO DR ,  KOLMAN FRANK DR

    IPC: C08C1/065 ,  C08F236/04 ,  C08J9/33 ,  D06N3/04

    Abstract: In the production of dispersion foam by emulsion copolymerization of dienes and olefins, the average particle size and distribution of the final coarse dispersion are adjusted by varying the solid content of the fine dispersion, agglomeration conditions, olefin comonomer content, emulsifier concentration and/or agglomeration throughput. A process for the production of polymer dispersion foam (L) comprises: (a) radical emulsion polymerisation of a mixture (M) of conjugated diene monomer(s) (A) and olefinic comonomer(s) (B) in presence of emulsifier(s) to form a finely divided polymer dispersion (P), (b) pressure-agglomeration of (P) to a coarse dispersion (G), (c) optional concentration of (G) and optional mixing with a booster dispersion and (d) expansion to give foam (L). The average particle size and the particle size distribution of (G) are adjusted by varying; (1) the solid content of (P), (2) the agglomeration temperature in stage (b), (3) the agglomeration pressure in (b), (4) the content of comonomer (B) in mixture (M), (5) the concentration of emulsifier in (P) and/or (6) the throughput in agglomeration. Independent claims are also included for: (1) polymer dispersions (G) (optionally concentrated or mixed with a resin dispersion H) obtained by this process; (2) polymer dispersion foam (L) obtained by this process.

    3.
    发明专利
    未知

    公开(公告)号：ES2080998T3

    公开(公告)日：1996-02-16

    申请号：ES92112671

    申请日：1992-07-24

    Applicant: BASF AG

    Inventor： DEGRAVE ISIDOOR DR ,  FISCHER JOACHIM DR ,  GRAALMANN ONNO DR

    IPC: C08J9/14 ,  C08F4/642 ,  C08F297/08 ,  C08J9/00 ,  C08L23/08 ,  C08L23/14 ,  C08L23/16 ,  C08L53/00

    Abstract: In foams having a density of from 0.01 to 0.2 g/cm3 and a cell count of from 2 to 1,000 cells/mm2 and based on an impact copolymer, the impact copolymer consists of a) from 1 to 55% by weight of a block copolymer of a1) from 35 to 65% by weight of ethylene and a2) from 35 to 65% by weight of propylene and b) from 45 to 99% by weight of a random copolymer of b1) from 0.5 to 6% by weight of ethylene and from 94 to 99.5% by weight of propylene, or of b2) from 0.5 to 12% by weight of but-1-ene and 88 to 99.5% by weight of propylene.

    10.
    发明专利
    未知

    公开(公告)号：DE59601259D1

    公开(公告)日：1999-03-18

    申请号：DE59601259

    申请日：1996-11-27

    Applicant: BASF AG

    Inventor： CLAASSEN PETER ,  GRAALMANN ONNO DR ,  HORMUTH WOLFGANG ALOIS ,  VISSEREN MARINUS VISSEREN MARI

    IPC: C08F2/22 ,  C08F2/24 ,  C08F36/04 ,  C08F236/04

    Abstract: Process for preparing an aqueous polymer dispersion by radical aqueous emulsion polymerisation of a mixture of monomers having at least one ethylenically unsaturated group, the mixture containing at least 30 wt. % in total mixture of monomers (A) containing two conjugated ethylenically unsaturated double bonds, comprises (a) dividing the monomer mixture into n portions, where n is at least 2; (b) introducing the first monomer portion into the polymerisation reactor together with dispersing agent, radical polymerisation initiator and aqueous dispersing medium and polymerising in a first stage commencing at a polymerisation starting temperature TP1 of 0 degrees C ≤ TP1 ≤ 50 degrees C such that the temperature of the polymerisation mixture rises by at least 20 degrees C to a highest value of TP1H without exceeding 80 degrees C, and then holding the temperature constant within the range TP1H to TP1H-10 degrees C until the conversion U1 of monomer to polymer is at least 60 but at most 90 mol %, after which the polymerisation mixture is cooled to a polymerisation starting temperature TP2 where TP2 = TP1 plus or minus 10 degrees C and 0 degrees C ≤ TP2 ≤ 50 degrees C; (c) adding the second monomer portion and polymerising the monomer mixture present in the reactor in the presence of the polymer already formed, the dispersing agent and the polymerisation initiator in a second polymerisation stage commencing at the polymerisation starting temperature TP2 such that the temperature of the polymerisation mixture rises by at least 20 degrees C to a highest value of TP2H without exceeding 80 degrees C, and then holding the temperature constant within the range TP2H to TP2H-10 degrees C until the conversion U2 of monomer to polymer is at least 60 but at most 90 mol %, after which the polymerisation mixture is cooled to a polymerisation starting temperature TP3 where TP3 = TP1 plus or minus 10 degrees C and 0 degrees C ≤ TP3 ≤ 50 degrees C; (d) adding and polymerising the remaining n-2 portions of the monomer mixture successively in the same way as the second portion and (e) after the nth polymerisation stage, optionally continuing the polymerisation at a temperature of 0-50 degrees C to a total conversion Utot of monomers introduced to polymer of at least 95mol. %.

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