Dense star polymers having core, core branches, terminal groups
Patent 4507466 Issued on March 26, 1985. Estimated Expiration Date: 
January 7, 2003. 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.
January 7, 2003. 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 3528928 3578643 3580891 3773739 Novel polyelectrolytes Macromolecular highly branched homogeneous compound based on lysine units Branched polyamidoamines Patent #: 4435548 InventorsAssigneeApplicationNo. 06/456226 filed on 01/07/1983US Classes:528/332, With organic amine, or from organic amine salt of a carboxylic acid525/451, Solid polymer derived from carboxylic acid or derivative derived from ethylenically unsaturated reactant528/310, From imide- or lactam-containing compound, or from an amino-nitrogen containing carboxylic acid, or derivative of an amino-nitrogen-containing carboxylic acid528/328, From N-C-(C=O)-OH containing reactant or acid derivative thereof, e.g., alpha amino acid, etc.528/363With nitrogen-containing reactantExaminersPrimary: Anderson, Harold D.International ClassesA61K 47/48 (20060101)C08G 83/00 (20060101) C09D 7/00 (20060101) C09D 201/00 (20060101) C10G 33/04 (20060101) C10G 33/00 (20060101) B01D 17/04 (20060101) C08G 73/00 (20060101) C08G 69/44 (20060101) C08G 69/00 (20060101) C08G 69/48 (20060101) C08G 73/02 (20060101) AbstractDense star polymers having terminal group densities greater than conventional star polymers exhibit greater and more uniform reactivity than their corresponding conventional star polymers. For example, a third generation, amine-terminated polyamidoamine dense star polymer prepared from ammonia, methyl acrylate and ethylenediamine has 1.24×10-4 amine moieties per unit volume (cubic Angstrom units) in contrast to the 1.58×10-6 amine moieties per unit volume contained by a conventional star polymer. Such dense star polymers are useful as demulsifiers for oil/water emulsions, wet strength agents in the manufacture of paper, and agents for modifying viscosity in aqueous formulations such as paints.Other References
Field of SearchWith nitrogen-containing reactantFrom imide- or lactam-containing compound, or from an amino-nitrogen containing carboxylic acid, or derivative of an amino-nitrogen-containing carboxylic acid From N-C-(C=O)-OH containing reactant or acid derivative thereof, e.g., alpha amino acid, etc. With organic amine, or from organic amine salt of a carboxylic acid | |
