Aqueous multiphase dispersions for multicolour coatings

Details Aqueous multiphase dispersions for multicolour coatings Aqueous multiphase dispersions for multicolour coatings

C - Chemistry, Metallurgy

09

D

C09D 7/14 (2006.01) C09D 5/29 (2006.01)

Patent

CA 2255481

Aqueous multiphase dispersions for multicolour coatings are produced by a process essentially comprising the steps of: - providing one or more emulsion paints; - adding at least one linear colloid capable of being insolubilised by borate ions and at least one hydrophilic inorganic clay to said paints to form base paints; - providing an aqueous medium containing at least one hydrophilic inorganic clay; - adding said base paints into said aqueous medium; - adding borate ions to said aqueous medium; - adding at least one emulsified binder to said medium; each of the emulsion paints having a different colour. It is preferred to use galactomannoglycans as colloid (most preferably guar gum) and synthetic clays (most preferably of the smectite or hectorite types).

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