Ultraviolet absorbing copolymers
Patent 4310650 Issued on January 12, 1982. Estimated Expiration Date: 
March 3, 2000. 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.
March 3, 2000. 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 2962533 3049503 3107199 3113907 3133042 3173893 3215665 3320116 3341493 3366668 InventorsAssigneeApplicationNo. 06/126580 filed on 03/03/1980US Classes:526/313, From phenol, phenol ether, or inorganic phenolate monomer428/522, Ester, halide or nitrile of addition polymer525/219Solid polymer derived from reactant containing a phenolic groupExaminersPrimary: Wong, Harry Jr.Attorney, Agent or FirmInternational ClassesC08F 212/00 (20060101)C08F 220/00 (20060101) C08F 212/32 (20060101) C08F 220/12 (20060101) AbstractPhotostable and weather stable absorping copolymers have been prepared from acrylic esters such as methyl methacrylate containing 0.1 to 5% of an 2-hydroxy-allyl benzophenone, preferably the 4,4' dimethoxy derivative thereof. The pendant benzophenone chromophores protect the acrylic backbone and when photoexcited do not degrade the ester side chain, nor abstract hydrogen from the backbone.Field of SearchFrom phenol, phenol ether, or inorganic phenolate monomer | |
