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US 3,979,346 AGranted
Emulsifiers for preparing aqueous dispersions of alkyd resins
AssigneeVianova Kunstharz, A.G.
InventorsBertram Zuckert, Wolfgang Schmut
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AssigneeVianova Kunstharz, A.G.
InventorsBertram Zuckert, Wolfgang Schmut
Estimating the term…
Emulsion systems for preparing aqueous dispersions of alkyd resins; aqueous dispersions of alkyd resins, and a process of making the dispersions are described. The emulsion system comprises an aqueous medium containing 0.5 to 3 percent by weight ammonia and (A) at least one non-ionic emulsifier, the hydrophobic part containing two or more radicals of unsaturated fatty acid and/or fatty alcohol with an iodine number of between 130 and 200, and the hydrophilic part containing polyethylene glycol chains and/or monomethoxypolyethylene glycol chains with from 6 to 100 ethylene oxide units; and (B) at least one anionic emulsifier, the hydrophobic part containing two or more radicals of unsaturated fatty acid and/or fatty alcohol with an iodine number of between 130 and 200, and the hydrophilic part including carboxylic groups. In accordance with the process for dispersing alkyd resins, the alkyd resin is dispersed in water containing 0.5 to 3 percent by weight of ammonia employing the aforesaid emulsion combination, at least 50 percent of the carboxyl groups of the anionic emulsifier being dissociated by the ammonia. The aqueous dispersions of the invention permit the use of lower amounts of polyethylene glycol in the emulsifier system in relation to the prior art systems. The cured films of the dispersions have the emulsifier chemically linked to the alkyd resin. This feature is responsible for the excellent water and alkali resistance of the films.
An alkyd resin dispersion dispersed in water containing 0.5 to 3 percent by weight of ammonia and as a dispersing aid, an emulsifier combination of (A) at least one non-ionic emulsifier, the hydrophobic part containing two or more radicals of a member of the group consisting of unsaturated fatty acids;
An emulsifier combination for use in preparing aqueous alkyd resin dispersions comprising (A) at least one non-ionic emulsifier, the hydrophobic part containing two or more radicals of a member of the group consisting of unsaturated fatty acids;
Process for producing aqueous dispersions by dispersing an alkyd resin in water containing 0.5 to 3 percent by weight of ammonia in the presence of an emulsifier combination of (A) at least one non-ionic emulsifier, the hydrophobic part containing two or more radicals of a member of the group consisting of unsaturated fatty acids;
Dependencies are inferred from the claim text.