Aqueous polymer dispersions preparation
Patent 4560724 Issued on December 24, 1985. Estimated Expiration Date: 
June 28, 2004. 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.
June 28, 2004. 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 3632535 Process for the continuous production of an ethylene/vinyl acetate copolymer dispersion Vinyl acetate copolymer emulsions for paint Copolymers for pressure-sensitive adhesives based on acrylic esters, (meth)acrylamide vinyl acetate and ethylene Patent #: 4322516 InventorsAssigneeApplicationNo. 06/625669 filed on 06/28/1984US Classes:524/734, Starch or derivative, farinaceous flour or meal524/47, Starch or derivative or farinaceous meal or flour524/48, Dextrin or derivative524/52, Solid polymer derived from ethylenic reactants only524/832, Monomer is carboxylic acid or derivative527/313, Ethylenically unsaturated reactant527/314Unsaturated carboxylic acid or derivative reactantExaminersPrimary: Welsh, Maurice J.Assistant: Nutter, Nathan M. Attorney, Agent or FirmInternational ClassesC08F 2/20 (20060101)C08F 2/12 (20060101) Foreign Application Priority Data1983-07-01 DEAbstractA process for the preparation of aqueous polymer dispersions comprising polymerizing compounds with unsaturated ethylenic bonds at a temperature of 10° to 100° C. in the presence of an at least partially water-soluble free-radical initiator and at least one starch and/or starch derivative and optionally present conventional adjuvants with the starting mixture containing not more than one third of the total monomers and the remaining monomer being added during the polymerization, the initiators being at least one member of the group consisting of hydrogen peroxide, ketone peroxides and organic hydroperoxides in an amount of at least 30 mmol per kg of total monomer mixture and optionally present water-soluble reducing agents and the starch is water-soluble or gells in water and contains not more than 30% by weight of amylose and the starch derivative is hydrolyzed starch in an amount of at least 0.6% by weight based on the total monomer weight. | |
