Additive for papermaking
March 29, 2016. 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 ReferencesEmulsifier-free aqueous dispersion useful in coating comprising aminoplast resin and polymer of monoethylenic carboxylic acid prepared by polymerization in the presence of low molecular weight polyhydric alcohol Process for producing methylolated amide copolymers in concentrated organic solvent solution Method for reducing the adhesiveness of hydrogel-like polymer by adding polyethylene glycol Amine crosslinked methacrolein copolymers for coatings, binders and adhesives Polycarbonates having plasticizers with fugitive activity Antistatic acrylic resin composition and method for the production thereof Papermaking additive Polymeric papermaking additive Lubricant-containing aqueous preparations of copolymers Patent #: 5399616 InventorsAssigneeApplicationNo. 624183 filed on 03/29/1996US Classes:524/724, ROH or COOH, or salts thereof, e.g., alkanol amine or amino acid, etc.524/547, From reactant-containing atom other than O, N, C, halogen, or hydrogen524/555, From nitrogen-containing monomer other than acrylonitrile or methacrylonitrile524/761, Containing hydroxyl group DNRM524/765, Alcohol compound as DNRM, i.e., R-OH524/766, Two or more alcohols524/767, With water NRM524/812, N-containing monomer other than: unsubstituted ammonium as sole nitrogen, acrylamide, methylol acrylamide, acrylonitrile and the corresponding methacryl compounds or mixtures thereof524/815, Quaternary nitrogen-containing monomer, e.g., tetramethyl ammonium, etc.526/292.95, Halogen monomer contains a carboxylic acid, salt, or carboxylic acid amide526/307, Non-amide nitrogen containing526/307.2, With monomer containing carboxylic acid amide group526/307.3, With monomer containing nitrogen other than (meth)-acrylonitrile526/307.7Oxygen atom is part of ester group derived from unsaturated carboxylic acidExaminersPrimary: Reddick, Judy M.Attorney, Agent or FirmForeign Patent References
International ClassC08K 005/16Foreign Application Priority Data1995-03-30 JPAbstractA novel additive for papermaking is disclosed. The additive comprises an aqueous solution of a copolymer obtained by reacting (a) an acrylamide, (b) a vinyl monomer which is copolymerizable with component (a) and has a cationic group, (c) at least one of vinyl monomers which are copolymerizable with component (a) and (b) and have 2, 3 or 4 carboxyl groups in a molecule thereof and/or a salt thereof, optionally (e) a nonionic monomer which is copolymerizable with components (a), (b) and (c) if desired, and (d) a cross-linking compound, in the presence of (f) at least one of ethylene glycol, diethylene glycol, diethanolamine and glycerin.This novel additive for papermaking is able to achieve excellent freeness and retention in the process of papermaking and provides paper with increased strength.Field of SearchROH or COOH, or salts thereof, e.g., alkanol amine or amino acid, etc.Containing hydroxyl group DNRM With water NRM N-containing monomer other than: unsubstituted ammonium as sole nitrogen, acrylamide, methylol acrylamide, acrylonitrile and the corresponding methacryl compounds or mixtures thereof Quaternary nitrogen-containing monomer, e.g., tetramethyl ammonium, etc. From reactant-containing atom other than O, N, C, halogen, or hydrogen From nitrogen-containing monomer other than acrylonitrile or methacrylonitrile Alcohol compound as DNRM, i.e., R-OH Two or more alcohols Halogen monomer contains a carboxylic acid, salt, or carboxylic acid amide Non-amide nitrogen containing With monomer containing carboxylic acid amide group With monomer containing nitrogen other than (meth)-acrylonitrile Oxygen atom is part of ester group derived from unsaturated carboxylic acid | |
