Copolymers based on C1 -C8 -alkyl acrylates and/or methacrylates and preparation and use thereof
Patent 5240771 Issued on August 31, 1993. Estimated Expiration Date: 
December 28, 2012. 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 28, 2012. 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 3876596 Preparation of aqueous polyacrylate dispersions having improved flow characteristics Method and apparatus for storing, mixing and delivering dental amalgam Polyacrylate dispersions Patent #: 4670505 InventorsAssigneeApplicationNo. 997560 filed on 12/28/1992US Classes:428/395, Polyamide, polyimide or polyester252/8.83, Sizing agents (e.g., for weaving yarn, etc.)428/361, With coating or impregnation525/378, Ammonia, ammonium hydroxide, or salts thereof525/418, Solid polymer derived from at least one carboxylic acid or derivative525/451, Solid polymer derived from carboxylic acid or derivative derived from ethylenically unsaturated reactant526/202, Normally solid polymer contains free alcohol group or alcoholate thereof526/210, Material contains alcohol or alcoholate526/212, Alcohol contains a single hydroxy group or is alcoholate thereof526/318.4, With ester monomer526/319, From carboxylic acid ester monomer526/328, Derived from an ethylenically unsaturated carboxylic acid526/328.5, With additional monomer526/329.7Polymer derived from methyl acrylate or methyl methacrylateExaminersPrimary: Schofer, Joseph L.Assistant: Zitomer, Fred Attorney, Agent or FirmForeign Patent References
International ClassesB32B 027/36C08F 008/42 C08F 008/44 Foreign Application Priority Data1990-04-02 DEAbstractCopolymers suitable for use as temporary surface protection for two- or three-dimensional structures and as sizing agents are based on C1 -C8 -alkyl acrylates and/or methacrylates and are obtainable by free radical emulsion or solution polymerization ofA) from 50 to 95% by weight of a C1 -C8 -alkyl acrylate or methacrylate,B) from 5 to 20% by weight of an unsaturated carboxylic acid or anhydride,C) from 0 to 20% by weight of further water-soluble comonomer, andD) from 0 to 10% by weight of other comonomer in the presence ofE) from 2 to 60 parts by weight of a polyvinyl alcohol per 100 parts by weight of the monomer mixture of A) to D). | |
