Paper sizing agents and methods
October 16, 2018. 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 3061471 3061472 Anionic sizes Surface sizing of paper with an acrylic copolymer where scum formation is minimized Surface sizing compositions for paper Method of making aqueous emulsions of acrylate copolymers in the presence of a degraded starch protective colloid Cationic sizing agent for paper and a process for the preparation thereof Aqueous polymer dispersions preparation Cationic sizing agent for paper, and a process for its preparation Preparation of stable aqueous polymer dispersions which contain an alkenyl-aromatic compound as copolymerized units InventorsAssigneeApplicationNo. 174076 filed on 10/16/1998US Classes:524/27, Carbohydrate or derivative DNRM162/164.1, Synthetic resin162/164.6, Nitrogen containing162/168.1, Polymerized unsaturated compound162/175, Carbohydrate162/176, Cellulose (non-fibrous)162/177, Cellulose derivative (e.g., cellulose ester)162/180, Natural resin524/28, Algin or derivative524/35, Cellulose524/47, Starch or derivative or farinaceous meal or flour524/458, Polymerizing in the presence of water and in the presence of a solid polymer derived from ethylenic reactants only524/459, Solid polymer utilized contains vinyl alcohol units524/732, Carbohydrate or derivative as DNRM524/734Starch or derivative, farinaceous flour or mealExaminersPrimary: Nutter, Nathan M.Attorney, Agent or FirmForeign Patent References
International ClassesC08L 005/00C08F 002/16 AbstractSizing agents comprised of dispersed synthetic polymers in an aqueous solution are provided, as well as methods for making these sizing agents and methods for using these sizing agents to size paper. Improved sizing is obtained by including recurring units of methyl acrylate, ethyl acrylate and/or propyl acrylate in the synthetic polymers.Other References
Field of SearchCarbohydrate or derivative DNRMAlgin or derivative Cellulose Starch or derivative or farinaceous meal or flour Polymerizing in the presence of water and in the presence of a solid polymer derived from ethylenic reactants only Solid polymer utilized contains vinyl alcohol units Carbohydrate or derivative as DNRM Starch or derivative, farinaceous flour or meal Synthetic resin Nitrogen containing Polymerized unsaturated compound Carbohydrate Cellulose (non-fibrous) Cellulose derivative (e.g., cellulose ester) Natural resin | |
