Preparations de pigment pour coloration des plastiques, et leur procede d'obtention

Easily dispersible pigment compsns. - by spray drying a mixt. of an aq. pigment paste or dispersion and an aq. polymer suspension

  • Inventors:
  • Assignees: Bayer Ag
  • Publication Date: December 17, 1976
  • Publication Number: FR-2311826-A1


Pigment preparations are made by mixing a pigment paste or aq. pigment suspension contg. >=30. % of pigment, with an aq. polymer suspension contg. at 30-200 degrees C. Prods have excellent dispersing properties and are free from pigments aggregates which lead to uneven distribution of pigment. Suitable polymers are (co)polymers of olefins, dienes, styrene, (meth)acrylic acid, 7meth)acfylamide, (meth)acrylonitrile, vinyl esters, vinyl ethers, vinyl alcohol, vinyl ketones, vinyl chloride, vinylidene chloride maleic anhydride, maleic acid, fumaric acid, a polyamide, polyesters, polyurethanes or ABS, with a particle size of 0.01-20 mu, esp. 0.05-10 mu. The dispersion may also contain liquefaction agents such as alkali metal polyphosphates, lignosulphonates and basic salts of trivalent polyphosphates, lignosulphonates and basic salts of trivalent metals, and dispersing agents such as alkali metal polyphosphates alkylamines, alkanolamines, ammonium-or alkali metal salts of fatty acids and alkali metal polyacrylates.




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Cited By (4)

    Publication numberPublication dateAssigneeTitle
    EP-0014503-A1August 20, 1980Rohner AG PrattelnVerfahren zur Herstellung von in wässrigen Medien dispergierbaren, hochkonzentrierten, feindispersen, dispergiermittelarmen oder dispergiermittelfreien Präparaten von in Wasser schwer löslichen bis unlöslichen Wirksubstanzen in fester Form
    FR-2338971-A1August 19, 1977Bayer AgPolymeres abs ou polyamides pigmentes
    NL-9400781-ADecember 01, 1995Holland Colours NvPigmentconcentraat.
    WO-9531507-A1November 23, 1995Holland Colours N.V.Concentre de pigment