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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.

    Water-based polymer dispersions
    5.
    发明专利
    Water-based polymer dispersions 未知

    公开(公告)号：DE19548313A1

    公开(公告)日：1997-06-26

    申请号：DE19548313

    申请日：1995-12-22

    Applicant: BASF AG

    Inventor： BALK ROELOF DR ,  CLAASSEN PETER ,  GRAALMANN ONNO DR ,  VISSEREN MARINUS

    IPC: C08F2/08 ,  C08F2/22 ,  C08F4/40 ,  C08F236/04 ,  C08K3/22 ,  C08L9/10

    Abstract: In a water-based polymer dispersion of a polymer consisting of (a) at least 50 wt. % of at least one monomer of butadiene and isoprene (monomer a), (b) at least 10 wt. % of at least one monomer of acrylic and methacrylic acid esters and 1-8 C alkanol esters (monomer b) and (c) 0-10 wt. % of another radically copolymerisable monomer bearing at least one ethylenic unsatd. gp. (monomer c) distributed in the dispersed state in the radically polymerised form, the total of monomers (a) and (b) polymerisation-introduced in the radically polymerised form is at least 90 wt. % per total of monomers (a). Also claimed are latex foam rubbers and a method for producing large polymer particles in the water-based polymer dispersion.

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