Manufacture of aqueous polymer dispersions and coating compositions derived from them
Patent 4322328 Issued on March 30, 1982. Estimated Expiration Date: 
December 7, 1999. 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.
December 7, 1999. 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 References 3652497 3657175 3779970 3891591 3894980 Nonionic monomeric emulsion stabilizers Vinyl benzyl ethers and nonionic water soluble thickening agents prepared therefrom Aqueous polymeric thickening agents Polymeric thickeners, processes for their preparation and uses thereof Novel polymers and polymeric salts Patent #: 4151341 InventorsAssigneeApplicationNo. 06/102107 filed on 12/07/1979US Classes:524/458, Polymerizing in the presence of water and in the presence of a solid polymer derived from ethylenic reactants only524/457, Polymerizing an ethylenic monomer in the presence of a preformed SICP or solid polymer and in the presence of a nonreactive material so as to form an aqueous dispersion, latex, suspension, or emulsion therewith; or product thereof524/762, Two or more ether linkages in the hydroxyl group bearing molecule524/806, Silicon-containing monomer524/813, Nitrogen-carbon-oxygen bond containing monomer, e.g., allyl isocyanate, etc.524/824, Aromatic monomer524/833Two or more carboxylic acids or derivativesExaminersPrimary: Michl, Paul R.Attorney, Agent or FirmInternational ClassesC08F 2/12 (20060101)C08F 2/16 (20060101) Foreign Application Priority Data1978-12-07 GBAbstractSterically stabilized aqueous polymer dispersions of at least 20% solids content are made by free radical-initiated polymerization of monomers in an aqueous medium at a temperature at least 10° C. higher than the glass transition temperature of the polymer to be formed, in the presence of a compound which is soluble in the aqueous medium and contains in the molecule a polymeric component of molecular weight at least 1000 which is solvatable by the aqueous medium and an unsaturated grouping which can copolymerize with the monomers, the conditions being such that there is at no time present a separate monomer phase. The dispersions are useful as a basis of improved coating compositions. | |
