Condensation copolymers containing methine ultraviolet radiation-absorbing residues and shaped articles produced therefrom
Patent 4749772 Issued on June 7, 1988. Estimated Expiration Date: 
July 20, 2007. 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.
July 20, 2007. 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 3597434 Aromatic bisazomethines, a method for their preparation, and their use as reactive pigments Polyester compositions having improved resistance to radiation deterioration Condensation polymers and products therefrom Patent #: 4617373 InventorsApplicationNo. 07/075389 filed on 07/20/1987US Classes:528/288, Nitrogen-containing reactant525/445, Mixed with ethylenically unsaturated reactant or polymer therefrom525/46, Polymer mixed with unsaturated reactant containing nitrogen atom528/183, Nitrogen reactant contains at least one amino-nitrogen atom528/192, Ethylenically unsaturated reactant528/193, Two or more phenolic reactants528/194, Two or more polycarboxylic acids or derivatives as reactants528/290, Sulfur-containing reactant528/302, Two or more carboxylic acid or derivatives or mixtures thereof528/303, Ethylenically unsaturated carboxylic acid or ethylenically unsaturated derivative528/304Aryl-containing carboxylic acid or derivative of an aryl-containing carboxylic acidExaminersPrimary: Phynes, Lucille M.Attorney, Agent or FirmInternational ClassesC07D 307/00 (20060101)C07D 307/54 (20060101) C07D 307/64 (20060101) C07D 307/56 (20060101) C07D 307/58 (20060101) C07D 333/28 (20060101) C07D 333/32 (20060101) C07D 333/34 (20060101) C07D 333/24 (20060101) C07D 333/00 (20060101) C08G 63/00 (20060101) C08G 63/688 (20060101) C08G 63/91 (20060101) C08G 63/685 (20060101) AbstractA composition useful for molding into articles such as food containers, soft drink bottles, cured structural plastics and the like, comprising molding or fiber grade linear or unsaturated polyester or polycarbonate having copolymerized therein a total of from 1.0 to about 5,000 ppm, of the residue of one or a mixture of methine reactants of the formula ##STR1## wherein A is an unsubstituted or substituted 2-furanyl, 2-thienyl or 3-thienyl radical;R1 is hydrogen or a unsubstituted or substituted alkyl, cycloalkyl or aryl radical; andR2 is hydrogen or an unsubstituted or substituted alkyl, alkenyl, cycloalkyl or aryl radical.The methine residues are present in the polymer as an integral part of the polymer chain and absorb ultraviolet radiation in the range of about 150 to about 390 nm. The residues are non-extractable from the polymer and stable at the conditions at which the polymers are manufactured and processed.Field of SearchNitrogen-containing reactantSulfur-containing reactant Two or more carboxylic acid or derivatives or mixtures thereof Ethylenically unsaturated carboxylic acid or ethylenically unsaturated derivative Aryl-containing carboxylic acid or derivative of an aryl-containing carboxylic acid Nitrogen reactant contains at least one amino-nitrogen atom | |
