Polyfunctional aziridine crosslinking agents for aqueous magnetic recording media binder
Patent 4490505 Issued on December 25, 1984. Estimated Expiration Date: 
December 25, 2001. 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 25, 2001. 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 2933416 3017280 3225013 3499789 3901816 Silanol-containing urethane dispersions Aqueous coating composition and method Process for producing magnetic recording device Patent #: 4368237 InventorApplicationNo. 06/240265 filed on 03/16/1981US Classes:524/591, Water DNRM252/62.54, Synthetic resin427/128, Magnetic coating427/129, With pretreatment of base427/130, With post-treatment of coating or coating material427/131, Applying superposed diverse coating or coating a coated base427/132, Metal coating428/413, Of epoxy ether428/423.7, Next to polyester (polyethylene terephthalate, etc.)428/458, Next to polyester, polyamide or polyimide (e.g., alkyd, glue, or nylon, etc.)428/69, Filled with gas other than air; or under vacuum428/900, MAGNETIC FEATURE523/402, Product contains water per se or water of hydration as designated nonreactive material (DNRM)524/431, Transition metal atom (i.e., Fe,Co,Ni)524/556, From carboxylic acid or ester thereof monomer524/603, Reactant contains atom other than C, H, or O524/609From sulfur-containing reactantExaminersPrimary: Pertilla, Theodore E.Attorney, Agent or FirmInternational ClassesC08K 5/00 (20060101)C08K 5/3412 (20060101) G11B 5/702 (20060101) AbstractIn the manufacture of magnetic recording media, coatings are applied from water-borne dispersions of inorganic particles, a polymer containing functional groups and an agent for crosslinking the polymer, the crosslinking agent being a polyfunctional aziridine such as ##STR1## | |
