| 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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| 04/28/1991 | WO1991006217A1 A process of combatting microorganisms |
| 04/24/1991 | EP0423565A2 Perfluoralkyl groups containing copolymers |
| 04/24/1991 | EP0328533B1 A method for the manufacture of products containing fibers of lignocellulosic material |
| 04/24/1991 | EP0311642A4 Temperature adaptable textile fibers and method of preparing same |
| 04/24/1991 | CN1050889A Structural aggregate pigments |
| 04/24/1991 | CN1050888A Structural aggregate pigments |
| 04/18/1991 | WO1991005108A1 Fibres of increased specific surface area, a method for their manufacture, fluff pulp consisting of such fibres and the use of the fibres as absorption material |
| 04/18/1991 | WO1991005106A1 Aluminium-salt impregnated fibres, a method for their manufacture, fluff consisting of such fibres, and the use of the fibres as absorption material |
| 04/17/1991 | EP0422202A1 Opacifying kaolin pigments and process for making same |
| 04/17/1991 | EP0320512B1 Process for making paper |
| 04/17/1991 | EP0156924B1 Chemically active composition containing ferrous ion |
| 04/16/1991 | US5008359 Impregnating paper with uncatalyzed polyisocyanate, curing |
| 04/16/1991 | US5008344 Cationic copolymers containing acrylic aldehyde, amide and ester monomers |
| 04/16/1991 | US5008321 Preparation of stable water-in-oil emulsions of hydrolyzed polymers of N-vinylamides and their use |
| 04/16/1991 | US5008306 Mixing aqueous dispersion of ionic dispersant and fibers and second, oppositely charged, dispersion of polymer powder; adding high molecular weight ionic polymer flocculant, draining, drying |
| 04/13/1991 | WO1991005745A1 Process for making structural aggregate pigments |
| 04/13/1991 | WO1991005604A1 Structural aggregate pigments |
| 04/13/1991 | CA2067376A1 Process for making structural aggregated pigments |
| 04/13/1991 | CA2067141A1 Structural aggregate pigments |
| 04/11/1991 | DE3933235A1 Flame retardant paper - is impregnated with organic aluminate salt soln. and coated with wax or silicone |
| 04/10/1991 | EP0421418A2 Method for preparing a ceramic-forming prepreg tape |
| 04/09/1991 | US5006590 Copolymerizing a blend of cationic monomer and water-soluble cationic polymers in an aqueous solution containing a polyvalent anion salt |
| 04/09/1991 | US5006574 Cationcally dispersed slurries of calcined kaolin clay |
| 04/09/1991 | US5006389 Erasable xerographic vellum |
| 04/03/1991 | EP0419964A2 Red iron oxide or brown iron oxide microbeads, their preparation and their use |
| 04/02/1991 | US5004791 Glass fiber sizing composition |
| 04/02/1991 | US5004643 Flexible, waterproof,porous; applying under pressure curable polymer |
| 04/02/1991 | US5004523 Delignification of lignocellulosic materials with monoperoxysulfuric acid |
| 04/02/1991 | CA1282537C Amino resins useful in sizing paper and their use |
| 04/02/1991 | CA1282211C Pitch control process utilizing quaternized polyamine ionene polymer |
| 03/28/1991 | CA2026120A1 Iron oxide red and iron oxide brown microgranulates, a process for their preparation and their use |
| 03/27/1991 | EP0419206A1 Vesiculated polymer granules and paper made therefrom |
| 03/27/1991 | EP0418343A1 Process for manufacturing paper, paperboard and cardboard in the presence of copolymerizates containing n-vinyl formamide units. |
| 03/26/1991 | US5002982 Paper felts or mats |
| 03/26/1991 | US5002634 Method for the delignification of wood pulp utilizing fused ring quinone compounds prepared from lignin or lignin derived substances |
| 03/20/1991 | EP0418191A1 Process for sizing papers containing calcium carbonate with resinous dispersions |
| 03/20/1991 | EP0418015A1 Active sizing compositions |
| 03/20/1991 | EP0417798A1 Process for the preparation of short prismatic aluminium hydroxide and its use as filler or pigment |
| 03/20/1991 | EP0417411A1 Process for stabilizing the viscosity of pulp |
| 03/20/1991 | EP0374196A4 Method of reducing pitch in pulping and papermaking |
| 03/19/1991 | US5001191 Process for dry cationization of polyvinyl alcohol |
| 03/19/1991 | US5000791 Process for the preparation of an acid-resistant coating on filler particles |
| 03/19/1991 | CA1281511C Sheets having improved stiffness from fiber, latex and coalescing agent |
| 03/13/1991 | EP0416427A1 Neutral sizing agent for rough paper masses using cationic polymer dispersions |
| 03/12/1991 | CA2024975A1 Active sizing compositions |
| 03/12/1991 | CA2016262A1 Process for sizing calcium carbonate-containing papers with resin size dispersions |
| 03/07/1991 | WO1991002791A1 Enzymatic bleaching of pulp |
| 03/07/1991 | WO1991002762A1 Cationic urea formaldehyde resins, process for preparing them and their use in the papermaking industry |
| 03/06/1991 | EP0415385A1 Method of making paper |
| 03/05/1991 | US4997895 Aqueous dispersion of cationic polymer |
| 03/05/1991 | US4997893 Graft copolymers, a process for their preparation and their use |
| 03/05/1991 | US4997682 Paper coating composition |
| 02/28/1991 | DE3927812A1 Kationische harnstoff-formaldehyd-harze, verfahren zu ihrer herstellung und ihre verwendung in der papierindustrie Cationic urea-formaldehyde resins, process for their preparation and their use in the paper industry |
| 02/27/1991 | EP0414496A1 Method and pulp for improving paper fines and filler retention |
| 02/23/1991 | CA2005896A1 High molecular weight dadmac/acrylamide copolymers as retention aids |
| 02/21/1991 | WO1991002119A1 Treatment of fibrous materials |
| 02/21/1991 | WO1991001882A1 Transparentized paper and method for its manufacture |
| 02/20/1991 | CN1049385A Improved diaphragms containing asbestos fibres, jointers for jointing cathode elements to diaphragms, and process for obtaining diaphragms and jointers |
| 02/19/1991 | US4994147 Photographic reflection print material with improved keeping properties |
| 02/19/1991 | US4994146 Creping adhesive utilizing polymer-polymer complex formation |
| 02/19/1991 | CA1280544C Vesiculated polymer granular compositions and paper made therefrom |
| 02/19/1991 | CA1280259C Method of making a water laid fibrous web containing one or more fine powders |
| 02/19/1991 | CA1280258C Water setting paper |
| 02/19/1991 | CA1280257C Hydrophilic cellulose product and method of its manufacture |
| 02/14/1991 | DE3924846A1 Aq. paper-coating material with high solids content - contains pigment mixt. of coarse calcium carbonate and non-film-forming polymer dispersion, and synthetic polymer binder dispersion |
| 02/13/1991 | EP0412916A1 Diaphragm comprising asbestos fibres, association of such a diaphragm with a cathodic element and process of manufacture |
| 02/12/1991 | US4992536 Preparation of polycationic polysaccharides by site selective reaction |
| 02/12/1991 | CA1280243C Flexible fibrous endothermic sheet material for fire protection |
| 02/11/1991 | CA2023031A1 Asbestos fiber diaphragm improvement method, association of said diaphragm with a cathodic element, and method of production therefor |
| 02/08/1991 | CA2019584A1 Cyclic amidocarboxy surfactants, synthesis and use thereof |
| 02/06/1991 | EP0411654A1 Additive for production of paper |
| 02/06/1991 | EP0411400A2 Basic condensates |
| 02/06/1991 | CN1049038A Vacuum al-plating gel without solvent |
| 02/06/1991 | CN1011519B Process for making paper |
| 02/05/1991 | US4990409 Base material impregnated with halogen-containing unsaturated polyester cured in polymerizable diluent |
| 02/05/1991 | US4990405 High strength; waterproofing; gasket seals; dielectrics; dielectrics; papers, films, boards and laminates; construction materials |
| 02/05/1991 | CA1279874C Stable emulsifier and substituted succinic anhydride compositions therewith |
| 02/05/1991 | CA1279795C Oil filters using water-based latex binders |
| 02/05/1991 | CA1279755C Method and products for sizing paper and similar materials |
| 01/30/1991 | EP0409836A1 Method for fabricating paper for bottle labels |
| 01/29/1991 | US4988806 Shampoo for hair |
| 01/29/1991 | US4988790 Substances for the manufacture of paper |
| 01/29/1991 | US4988757 Rubbers containing alkali metal aluminum silicates reinforcement for paper, paints, plastics, catalyst supports, oil absorbers |
| 01/29/1991 | US4988561 Paper coated with synthetic alkali metal aluminosilicates |
| 01/29/1991 | US4988470 Process for preparing structures of inorganic fiber material containing silicone resin |
| 01/29/1991 | CA1279744C Formaldehyde-free latex and fabrics made therewith |
| 01/29/1991 | CA1279450C Nonwoven fabric-like product using a bacterial cellulose binder and method for its preparation |
| 01/29/1991 | CA1279449C Process for making paper using a substituted succinic anhydride as a sizing agent |
| 01/25/1991 | WO1991001409A1 Cell wall loading of never-dried pulp fibers |
| 01/23/1991 | EP0165976B1 Method for preparing a composite sheet or for paper coating using stable latexes having phosphorous-containing surface groups |
| 01/22/1991 | US4987162 Fillers, extenders |
| 01/22/1991 | US4987022 Non-inflammable light-weighing tough board |
| 01/22/1991 | CA1279159C Lightweight paper and process for producing same |
| 01/19/1991 | CA2021392A1 Process of stabilizing the viscosity & strength of pulps |
| 01/15/1991 | US4985120 Method for controlling pitch deposits in pulp and papermaking processes with organotitanium (IV) compound |
| 01/15/1991 | CA1278904C Paper of high wet strength and process for making same |
| 01/09/1991 | EP0407257A2 Microcapsules containing amphiphilic hydrosoluble substances |
| 01/09/1991 | EP0407222A1 Paper coating compositions |
| 01/09/1991 | EP0406932A1 Process for the sizing of paper |
| 01/09/1991 | EP0406837A2 Cationic polysaccharides and reagents for their preparation |