Compositions: coating or plastic – Materials or ingredients – Miscellaneous
Patent
1977-09-21
1981-01-06
Howard, Jacqueline V.
Compositions: coating or plastic
Materials or ingredients
Miscellaneous
106308Q, 106309, 260 296WB, 260 296H, 260 296M, 260 4221, C08L 3310
Patent
active
042434300
ABSTRACT:
Described herein is a pigment paste for use in an aqueous paint comprising a film-forming latex polymer, a pigment and a dispersant copolymer. Also described is the dispersant copolymer which serves the function of dispersing the pigment in the preparation of the paste and maintaining the dispersion in the paste and paint made therefrom. The dispersant copolymer is such that its complex salt formed with Zn++ and ammonia is water-soluble at a pH of 9.6. The dispersant is a copolymer of an .alpha.,.beta.-unsaturated monovinylidene carboxylic acid and at least one other ethylenically unsaturated monomer. The dispersant is particularly adapted to preparing paste for difficult-to-formulate paints such as paints with reactive pigments and paints requiring high levels of dispersant.
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Sperry Peter R.
Wiersema Richard J.
Greenwald Harold L.
Howard Jacqueline V.
Rohm and Haas Company
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