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| Number | Title | Issue Date |
| 4964915 | Sizing composition, a method for the preparation thereof and a method of use The present invention relates to a novel sizing composition in the form of an aqueous emulsion comprising a hydrophobic cellulose reactive sizing agent and a cationic polymer comprising a starch, the novel features of said composition being that the starc... | 10/23/1990 |
| 4964953 | Amphoteric starches and process for their preparation Improved non-crosslinked and non-degraded amphoteric starch derivatives containing tertiary amino or quaternary ammonium groups and anionic phosphate groups are disclosed. The derivatives which are defined by a minimum bound phosphorus content, a minimum ... | 10/23/1990 |
| 4961825 | Papermaking process In the production of paper or pulp sheets from a paper stock, a binder is added which comprises cationic and anionic components to improve the paper characteristics and the stock characteristics, such that increased retention and a more readily dewatered ... | 10/09/1990 |
| 4956049 | Process for sizing paper with anionic hydrophobic sizing agents and cationic retention aids Sizing agents, some of which are known compounds and some of which are novel aromatic compounds which contain in the aromatic nucleus a single hydrophobic substituent containing at least 5 carbon atoms and at least one anionic group, said hydrophobic subs... | 09/11/1990 |
| 4954220 | Polysilicate microgels as retention/drainage aids in papermaking The use of anionic polysilicate microgels with an organic polymer to flocculate pulp and filler fines, such that water removal is easier and fines retention is greater.... | 09/04/1990 |
| 4952279 | Papermaking method Disclosed are a papermaking method comprising the steps of sheet-formation of an aqueous papermaking stock which contains a cellulose fiber or the said fiber and an inorganic filler, dewatering and drying, charaacterized by the addition of a starch ether ... | 08/28/1990 |
| 4950362 | Heat-insulating shaped fibrous articles and a process for producing them Elastic, heat-insulating shapes of ceramic, refractory or fireproof fibers and, where needed, further refractory or fireproof substances, and temporary or inorganic binders, as well as a process for the preparation thereof. The heat-insulating shapes are ... | 08/21/1990 |
| 4946557 | Process for the production of paper A process for the production of paper by forming and dewatering a suspension of cellulose containing fibers and optional fillers on a wire in the presence of a cationic silica based sol and a cationic polymeric retention agent. The cationic polymeric rete... | 08/07/1990 |
| 4943349 | Process for preparing a sheet material with improved on-machine retention Process for using papermaking techniques for preparing a sheet material with improved on-machine retention, sheet material thus obtained and its application, notably in the field of printing and writing, packaging and coverings. The invention relates to a... | 07/24/1990 |
| 4940514 | Making paper, board and cardboard of high dry strength Paper, board, and cardboard having high dry strength are made by adding to the paper stock a dry strength agent which is obtainable by mixing enzymatically digested starch having a viscosity of from 20 to 2,000 mPa.s (measured in 7.5% strength aqueous sol... | 07/10/1990 |
| 4935097 | Process for producing paper A paper having an absolute dry moisture content (moisture content in absolute dry condition) of 1.8-7% is subjected to a heat calendering treatment at a temperature of 150°-300° C. under a linear pressure of 40 kg/cm or above to provide a paper which ha... | 06/19/1990 |
| 4927498 | Retention and drainage aid for papermaking An improvement in a papermaking process in which an aqueous paper furnish containing cellulosic pulp, and optionally also mineral fillers is formed and dried, the improvement being the addition of a drainage and retention aid comprising a water soluble al... | 05/22/1990 |
| 4923566 | Method of pacifying stickies in paper Urea is used to pacify "stickies" in the manufacture of paper products, particularly coated boxboard.... | 05/08/1990 |
| 4919758 | Heat treatment of paper products having starch additives A paper product having high stiffness, wet strength, and opacity, and good folding endurance is produced by subjecting a paper web containing a starch additive to high temperature heat treatment.... | 04/24/1990 |
| 4911788 | Method of wet-forming mineral fiberboard with formation of fiber nodules A method of producing an acoustical mineral fiberboard comprising (a) forming an aqueous slurry of mineral fiber-containing solids suitable for forming an acoustical board, the solids content of the slurry being sufficiently high to bring about predominant for... | 03/27/1990 |
| 4911790 | Paper production The present invention relates to a process for obtaining retention of the manufacture of paper, whereby one adds a cationic, high polymer polysaccharide at the preparation of a stock of paper pulp; that one adds an anionic aluminium compound, or a combina... | 03/27/1990 |
| 4908100 | Hydrolyzed polyacrylamide blends as starch retention aids A method of improving the retention of starch in papermaking using blends of high and low molecular weight acrylic acid/acrylamide copolymers.... | 03/13/1990 |
| 4902382 | Process for producing a neutral paper A neutral wood containing paper can be produced by adding, to a stock slurry containing mineral filler and a large majority of high yield pulp, a cationized starch, and thereafter bentonite and colloidal silica either simultaneously or successively with a... | 02/20/1990 |
| 4892590 | Precipitated calcium carbonate-cationic starch binder as retention aid system for papermaking A two component binder system comprising a highly dispersible, high specific surface area precipitated calcium carbonate (colloidal PCC) and a cationic starch, especially a cationic potato starch, for improving filler retention, opacity and strength durin... | 01/09/1990 |
| 4878999 | Non-alum sizing A process is disclosed for sizing cellulose fibers with rosin-base materials in the substantial absence of alum, which can be performed at a neutural pH. According to the process, a saponified fortified rosin is added to the cellulose fibers in the presen... | 11/07/1989 |
| 4875974 | Absorbent vegetable material and process for making same An absorbent material derived from a vegetable material containing pectin.... | 10/24/1989 |
| 4872951 | Starch blends useful as external paper sizes This invention presents a series of blends of ASA-treated and cationic starches for use as external sizes of paper and paperboard products. The blends contain at least 30% (by wt) of the ASA-treated starch, which is a monoester of the starch and an alkyl ... | 10/10/1989 |
| 4861376 | High-solids alkyl ketene dimer dispersion Stable high solids dispersions of ketene dimer are provided by using water soluble carboxylic acid, e.g. acetic acid with cationic starch, sodium lignin sulfonate and aluminum sulfate.... | 08/29/1989 |
| 4853168 | Process for spinning starch fibers Raw starch is slurried in an aqueous solution containing up to and above saturation levels of an ammonium sulfate, ammonium monobasic or dibasic phosphate, sodium sulfate or mixtures thereof. The slurry is then cooked at temperatures above about 150° C. ... | 08/01/1989 |
| 4849055 | Process for making paper using a substituted succinic anhydride as a sizing agent A process for making paper using a substituted succinic anhydride as a sizing agent which has the steps of preparing pulp slurry containing (a) an aqueous dispersion of a substituted succinic anhydride in which a cationic tapioca starch containing at leas... | 07/18/1989 |
| 4840705 | Papermaking method Disclosed are a papermaking method comprising the steps of sheet-formation of an aqueous papermaking stock which contains a cellulose fiber or the said fiber and an inorganic filler, dewatering and drying, characterized by the addition of a starch ether d... | 06/20/1989 |
| 4832791 | Multipurpose sheet material and method of manufacture A sheet material is produced by pressing to sheet form in the presence of water a material derived from a plant of the type Beta Vulgaris (sugarbeet and beetroot). Fresh plant material can be used as well as plant material already used for sugar productio... | 05/23/1989 |
| 4824523 | Method of making paper with high filler content The invention relates to a method for producing paper by the addition of a retention - dry strength agent system. The system consists of cationic starch with a substitution degree of at least 0.005 in an amount of at least 1%, anionic high-polymer with a molec... | 04/25/1989 |
| 4820380 | Stabilized starch suspensions Aqueous suspensions of uncooked starch are stabilized by adding to the suspension a minor amount of a hydrophilic polymeric viscosity-increasing agent effective to prevent dilatancy and to increase the viscosity of the suspension so that settlement of sta... | 04/11/1989 |
| 4818341 | Production of paper and paperboard of high dry strength Paper and paperboard of high dry strength are produced by adding a dry strength enhancer to the paper stock and dewatering the paper stock with sheet formation by using as the dry strength enhancer a mixture of a cationic polymer which contains as charact... | 04/04/1989 |
| 4810785 | Crosslinked corn bran and utilization in papermaking A method of improving the utility of corn bran (i.e., hulls derived from milling) is provided. The corn bran is crosslinked with a polyvalent compound capable of forming a plurality of covalent bonds to one or more constituents of the corn bran. The cross... | 03/07/1989 |
| 4803242 | Diaphragm for loudspeakers A diaphragm for loudspeakers comprises chitin as a natural high polymeric material having a large value of Young's modulus and kraft pulp having large mechanical internal loss. Therefore, the deformation and the partial vibrations of the diaphragm during ... | 02/07/1989 |
| 4783239 | Absorbent vegetable material and process for making same Highly absorbent, pectin-containing materials from vegetable origin are disclosed. A process for preparing such materials from pectin-containing agricultural by-products is also disclosed.... | 11/08/1988 |
| 4756801 | Paper-making method and a combination of ingredients to be used in it In a paper-making method cellulose is suspended in water and the obtained pulp suspension is dewatered in order to form a fiber web or a fiber sheet, water being removed from a pulp suspension which contains an organic polymer and an inorganic oligomeric ... | 07/12/1988 |
| 4755259 | Process for papermaking In making paper from an aqueous paper making stock, a binder comprising colloidal silicic acid and guar gum is added to the stock for improving the paper or the retention of the stock components so that the pollution problems and the amount of valuable su... | 07/05/1988 |
| 4750974 | Papermaking aid An improved binder for use in paper-making contains three ingredients, a cationic starch having a degree of substitution of at least 0.01, a high molecular weight anionic polymer having a molecular weight of at least 500,000 and a degree of anionic substi... | 06/14/1988 |
| 4741804 | Polysaccharide derivatives containing aldehyde groups, their preparation from the corresponding acetals and use as paper additives Polysaccharide aldehydes having the formula ##STR1## starch, cellulose, and gum aldehydes, are useful for imparting wet, dry, or temporary wet strength to paper. They are prepared by a non-oxidative method which involves reacting the polysaccharide b... | 05/03/1988 |
| 4737239 | Process for the manufacture of paper or cardboard which is sized under alkaline or neutral conditions with anionic hydrophobic sizing agents and cationic retention aids Sizing agents devoid of anhydride groups, some of which are known and others are novel compounds, and which carry a single N,N-C6 -C22 alkyl(or alkenyl)amide group as hydrophobic substituent and at least one anionic group, in particu... | 04/12/1988 |
| 4735685 | Process for sizing paper or cardboard with anionic hydrophobic sizing agents and cationic retention aids Anionic sizing agents containing anhydride groups, which are novel compounds and which contain a single N,N-C6 -C22 di(alkyl- or alkenyl)amido group, a N-C6 -C22 (alkyl- or alkenyl)amido group or a C6... | 04/05/1988 |
| 4731162 | Polysaccharide derivatives containing aldehyde groups for use as paper additives Polysaccharide aldehydes having the general structure ##STR1## such as starch, cellulose and gum aldehydes, are useful for imparting wet, dry, or temporary wet strength to paper. They are prepared by a non-oxidative method which involves reacting the... | 03/15/1988 |
