Patents for D21H 17 - Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution (19,322) |
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12/23/1981 | EP0042259A1 Non-woven web material |
12/23/1981 | EP0042234A1 Lumen-loaded paper pulp, its production and use |
12/22/1981 | CA1114563A1 Method for the production of fibrous mats |
12/15/1981 | US4305860 Stable, pumpable, solvent-free colloidal polyampholyte latices, their preparation and use in paper |
12/15/1981 | US4305782 Filter and method of making same |
12/15/1981 | US4305781 Production of newprint, kraft or fluting medium |
12/15/1981 | CA1114248A1 Tea bags |
12/15/1981 | CA1114112A1 Fibrous product containing cellulosic fibers, its method of preparation and its use, in particular in the field of covering panels, in lieu of asbestos |
12/09/1981 | EP0041205A1 Process for the manufacturing of filter materials |
12/09/1981 | EP0041158A1 Filling material for paper, carboard or paste board, process for their fabrication and paper, cardboard or pasteboard |
12/08/1981 | US4304873 Preparation of expanded flexible polyurethane foam micro-bits |
12/08/1981 | US4304625 Using a polyvinyl acetate-ethylene copolymer emulsion and a water-soluble polyvinyl alcohol to retain the paper web on the drier; papermaking |
12/08/1981 | CA1114094A1 Quaternary ammonium salts of epihalohydrin polymers as additives for fibrous materials |
12/08/1981 | CA1113661A1 Composite material |
12/02/1981 | EP0041056A1 Papermaking |
11/25/1981 | EP0040524A2 Air-curing polymers and a process for preparing them |
11/24/1981 | US4302366 Telomerizing an organic thio acid with an ethylenically unsaturated compound |
11/24/1981 | US4302283 Water soluble salts of substituted succinic acid |
11/24/1981 | CA1112818A1 Paper sizing agents |
11/18/1981 | EP0039896A1 Process for treating fibrous materials |
11/18/1981 | EP0039794A1 Anionic dispersions, process for their preparation and their use as surface sizing agents for paper |
11/18/1981 | EP0039711A1 Amphoteric water-in-oil self-inverting polymer emulsion |
11/10/1981 | US4299654 Process for producing sized paper and cardboard with polyelectrolytes and epoxide-amine-polyamide reaction products |
11/10/1981 | CA1112006A1 Highly filled sheets and method of preparation thereof |
11/03/1981 | US4298715 Polyamine/epihalohydrin reaction products |
11/03/1981 | US4298639 Wet strength polymers |
11/03/1981 | CA1111995A1 Amphoteric polyelectrolyte |
10/28/1981 | EP0038573A1 Polymers of alpha-beta-unsaturated N-substituted carboxylic-acid amides and their use as sedimentation, flocculation, dewatering and retention auxiliary agents |
10/27/1981 | US4297299 Novel N-(alkyl)-N-(2-haloethyl)-aminomethylphosphonic acids, a method for the preparation thereof and their use in the preparation of starch ether derivatives |
10/27/1981 | CA1111210A1 Ionic coagulation in beater addition of binder latices in papermaking |
10/21/1981 | EP0038295A1 A mixture of reaction products of epoxide-polyalkylene-polyamino-amide and of polymerised products based on acryl and/or styrene, their preparation and their use as paper-sizing and textile-treating agents |
10/21/1981 | EP0037892A1 Resin acid ketenes, method of making same and application thereof to the hydrophobation of cellulosic surface articles |
10/20/1981 | US4296012 Sizing compositions incorporating ketene dimer |
10/20/1981 | US4295933 Producing dispersions of preflocculated fillers for use in papermaking |
10/20/1981 | US4295931 Sizing method and sizing composition for use therein |
10/20/1981 | US4295930 Alkoxylated dioxolanes as paper sizing agents |
10/15/1981 | WO1981002944A1 Insulating paper |
10/14/1981 | EP0037590A2 Polymers of acrylyl or methacrylyl ureas containing quaternary groups, and their use as flocculation, sedimentation, dewatering and retention auxiliary agents |
10/13/1981 | US4294885 Surface-modified pigment of natural kaolin material and a process of producing same |
10/13/1981 | US4294873 Polyalkaline earth metal acrylate impregnant |
10/13/1981 | CA1110414A1 Paper having good absorbency and alkali resistance |
10/07/1981 | EP0037379A1 Salts of reaction products of epoxides, polyalkylenepolyamino-amides, fatty amines and fatty acids, fatty acid esters, halogenides, isocyanates or ketene dimers, their preparation and their use as sizing agents |
10/07/1981 | EP0037055A1 Hydrophobic agent for flat cellulosic substrate, process for its manufacture and its use |
10/07/1981 | EP0036993A1 Process for ennobling paper and paper-board |
10/06/1981 | US4293667 Organic pigments |
10/06/1981 | US4293666 Organic pigments |
10/06/1981 | US4293476 Polymer particles having reactive groups on surfaces and a coreactive monomer |
10/06/1981 | CA1110124A1 Polyester-starch sized paper, sizing composition, and process therefor |
10/06/1981 | CA1110019A1 Process for manufacturing paper having improved dry strength |
09/29/1981 | CA1109999A1 Process for the production of paper sizing agents |
09/29/1981 | CA1109976A1 Process for surface-sizing papers with salts of reaction products of epoxides, fatty amines and polyalkyleneaminopolyamides |
09/22/1981 | US4291101 Wood fibrous material and a method for improving the qualities thereof |
09/15/1981 | US4289864 Oxidative polymerization of monomers having at least two activated unsaturations |
09/08/1981 | US4288462 Method for removing cationic contaminants from beverages |
09/02/1981 | EP0034893A2 Compositions for bonding fibrous substrates and cellulosic fibrous substrate treated therewith |
09/01/1981 | US4287110 Production of aqueous solutions of cationic thermosetting resins |
09/01/1981 | CA1107919A1 High strength nonwoven fibrous material |
09/01/1981 | CA1107910A1 Aqueous fortified rosin dispersions |
08/26/1981 | EP0034527A1 Fluor copolymers, their application to the hydrophobic and oleophobic treatment of different substrates, and substrates thus treated |
08/25/1981 | US4286030 Cured, cellulose fibers and thermoplastic fibers |
08/25/1981 | CA1107457A1 Complex amine-silane treated cellulosic materials |
08/20/1981 | WO1981002368A1 Separator with improved tensile strength for starved electrolyte lead/acid battery |
08/18/1981 | US4284759 Preparation of aminoplast resin particles |
08/18/1981 | US4284471 Dewatering, shaping on wire |
08/11/1981 | CA1106996A1 Cationization of starch utilizing alkali metal hydroxide, cationic water-soluble polymer and oxidant for improved wet end strength |
08/05/1981 | EP0033104A2 Process for producing water-soluble condensation products and their use as cross-linking agents in producing aids for paper manufacture |
08/05/1981 | EP0033064A1 Cationic paper sizing agents |
08/05/1981 | EP0032919A1 Accelerated pulping process. |
08/04/1981 | US4282060 A cationic graft addition polymer; paper fillers; opacity |
08/04/1981 | US4282059 Paper fillers |
08/04/1981 | CA1106110A1 Treatment of materials with silicon halides |
07/28/1981 | US4281199 Reacting a polyoxyalkylene polyol with an epinalohydrin and then an amine; cationic polymers |
07/28/1981 | US4281186 Papermaking, sewage treatment |
07/28/1981 | US4281109 Pollution-free cationization of starch |
07/28/1981 | US4281082 Fillers for paper, graft polymers of cationic amine monomers |
07/28/1981 | CA1106100A1 Micro-bits of expanded flexible polyurethanes |
07/23/1981 | WO1981002030A1 Use of polyalkylene oxides for the separation of cellulose fibres |
07/22/1981 | EP0032364A1 Use of polyalkylene oxides for the separation of cellulose fibres |
07/21/1981 | US4279959 Water-insoluble copolymers containing amide-polyaldehyde thermosettable system |
07/21/1981 | US4279794 Sizing method and sizing composition for use therein |
07/21/1981 | US4279695 Process for the manufacture of composite materials |
07/21/1981 | US4279661 Glossy paper coating, lacquer or paint |
07/15/1981 | EP0031899A1 Self-crosslinking water-soluble reaction products, process for producing binding agents from such products, and use of the products to increase the wet strength of paper |
07/15/1981 | EP0031832A1 Sheets products and preparation process thereof. |
07/14/1981 | US4278733 Reacting aniline, phenol, formaldehyde; adding epoxy resin; impregnating base |
07/14/1981 | US4278573 Preparation of cationic starch graft copolymers from starch, N,N-methylenebisacrylamide, and polyamines |
07/08/1981 | EP0031760A1 Cement-containing papers, process for their preparation and their uses |
07/07/1981 | US4277529 Bonding of lightweight tissue paper |
06/30/1981 | CA1104294A1 Method of controlling pitch |
06/30/1981 | CA1103968A1 Packing paper and method of making same |
06/23/1981 | US4274916 Quaternized zcrylamide copolymer |
06/17/1981 | EP0030443A1 Water-soluble phosphated guar product and method for making it |
06/17/1981 | EP0030435A1 Dispersible xanthan gum blends |
06/09/1981 | US4272297 Compositions for use with papermaking fillers |
06/03/1981 | EP0029714A1 Method of preventing erasure of an image and a booklet of security papers |
06/03/1981 | EP0029530A1 Process for internal sizing of paper |
06/02/1981 | US4271227 Poly-acrylate or-acrylamide monomer and polymerization catalyst impregnate cellulosic web |
06/02/1981 | US4270977 Process for preparing water sorptive products |
05/28/1981 | WO1981001430A1 Method of preventing erasure of an image and a booklet of security papers |
05/26/1981 | US4269657 Fibrous product containing cellulosic fibers, its method of preparation and its use, in particular in the field of covering panels, in lieu of asbestos |