中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

55 records (took 0.023 seconds)

    42.
    发明专利
    未知

    公开(公告)号：BRPI0507132A

    公开(公告)日：2007-06-19

    申请号：BRPI0507132

    申请日：2005-01-18

    Applicant: BASF AG

    Inventor： DANIEL THOMAS ,  RIEGEL ULRICH ,  ELLIOTT MARK

    IPC: C08F20/00 ,  C08F220/06

    Abstract: (Meth)acrylate salt polymers are prepared by free-radical polymerization of (meth)acrylate salt with or without other monomers in an aqueous medium by using a supersaturated aqueous solution of (meth)acrylate salt. The resulting highly concentrated reaction mixtures are notable for their high solids content and increased space-time yield.

    47.
    发明专利
    未知

    公开(公告)号：BRPI0408969A

    公开(公告)日：2006-04-04

    申请号：BRPI0408969

    申请日：2004-03-30

    Applicant: BASF AG

    Inventor： RIEGEL ULRICH ,  DANIEL THOMAS ,  HERMELING DIETER ,  ELLIOTT MARK ,  SCHWALM REINHOLD

    IPC: C07C69/00 ,  C08F20/18 ,  C08G65/26 ,  C08G65/28 ,  C08G65/332 ,  C09D5/02 ,  C08F20/00 ,  C08G65/32

    Abstract: Trimethylolpropane esters are new. Trimethylolpropane esters are of formula (1). (1) AO : OCH2CH2, OCH2CH(CH3), OCH(CH3)CH2, n1-n3 : 4-6; n1+n2+n3+n4 : 14-16; m1-m3 : 1-3; m1+m2+m3 : 4-6; R1-R3 : 4-6 Independent claims are included for: (1) a process for the production of esters of formula (1) by reaction of alkoxylated trimethylolpropane with (meth)acrylic acid in the presence of at least one esterification catalyst (C) and at least one polymerization inhibitor (D) as well as optionally a solvent (E) that forms an azeotrope with water; optionally removal of at least a portion of the water from the reaction mixture during or after the water from the reaction, optiionally neutralizing the reaction mixture; optionally removing the solvent if present by distillation and/or stripping with an inert gas; (2) across-linked hydrogel prepared by polymerization of an ester of formula (1) with (meth)acrylic acid with optionally additional monoethylenicaly unsaturated compounds (N) as well as optionally at least a further copolymerizable hydrophilic monomer (M) in the presence of at least one radicatl initiator (K) and optionally a graft base (L); optionally cross-linking of the resulting reaction mixture; drying of the reaction mixture and optionally grinding the reaction mixture; (3) a mixture comprising 0.1-40 wt.% of a ester of formula (1) and (meth)acrylic acid, 0.5-99.9 wt.% of a hydrophilic monomer (M), 0-10 wt.% of an esterification catalyst (C), 0-5 wt.% polymerization inhibitor (D) and 0-10 wt.% sovlent (E).

    49.
    发明专利
    未知

    公开(公告)号：DE102004009438A1

    公开(公告)日：2005-09-15

    申请号：DE102004009438

    申请日：2004-02-24

    Applicant: BASF AG

    Inventor： RIEGEL ULRICH ,  DANIEL THOMAS ,  WEISMANTEL MATTHIAS ,  ELLIOTT MARK ,  HERMELING DIETER

    IPC: C08F20/06 ,  C08F220/06 ,  C08J3/24 ,  C08J3/075 ,  A61L15/22

    Abstract: The invention concerns a process for producing water-absorbing polymer, which comprises a base polymer A being mixed with a first aqueous solution B of at least one surface postcrosslinker and a second aqueous solution C of at least one polyvalent cation and thermally treated, wherein said base polymer A is based on at least 50% neutralized acid-functional monomer and said solutions B and C are metered wholly or partly concurrently through separate nozzles whereby a water-absorbing polymer having a high saline flow conductivity value is obtained.

Patent Agency Ranking