Aqueous polymer dispersions having a long shelf life
June 23, 2008. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesAmbient or low-temperature curable coatings Aqueous dispersions, containing hydrazine derivatives, of carbonyl-containing copolymers Ambient or low-temperature curable coatings for leather and other flexible substrates Contact adhesive dispersions for the production of self-adhesive articles, for example those having a polyolefinic base Crosslinkable polymeric compositions which have a long shelf life when in the form of an aqueous solution or dispersion, their preparation and their use Patent #: 4786676 InventorsAssigneeApplicationNo. 210496 filed on 06/23/1988US Classes:524/517, Solid polymer from oxygen heterocycle monomer524/379, Carbon atom single bonded to an oxygen atom and wherein the carbon atom is not double bonded to a chalcogen atom DNRM, e.g., alcohols, etc.524/522Solid polymer derived from carboxylic acid-containing monomerExaminersPrimary: Lilling, Herbert J.Attorney, Agent or FirmForeign Patent References
International ClassesC08J 003/10C08K 005/25 C08L 033/06 C09D 003/80 Foreign Application Priority Data1987-06-24 DEAbstractAqueous polymer dispersions which have a long shelf life are obtainable by dispersing a mixture of 15-50% by weight of a copolymer (A) of(I) 1.5-15% by weight of copolymerizable compounds of 3 to 10 carbon atoms which contain a carboxyl or carboxylic anhydride group,(II) 30-98.5% by weight of C1 -C20 -alkyl acrylates or methacrylates,(III) 0-60% by weight of vinylaromatics,(IV) 0-20% by weight of copolymerizable carbonyl compounds and(V) 0-20% by weight of further copolymerizable organic compounds not stated under (I) to (IV) and50-85% by weight of a copolymer (B) of40-100% by weight of the monomers (II) and0-60% by weight of the monomers (III) to (V),with the proviso that the copolymers (A) and (B) together contain, as components, up to 65% by weight of alkyl (meth)acrylates (II) whose homopolymers have glass transition temperatures of less than 0° C., and that one or both of the copolymers (A) and (B) contain the monomers (IV) as components,in water with the addition of ammonia and a polyhydrazide (C), and the said dispersions are used for the preparation of finishes and coatings.Other References
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