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| Number | Title | Issue Date |
| 5098521 | Production of paper, board and cardboard from paper stocks containing foreign materials Paper, board and cardboard are produced from paper stocks containing foreign substances by drainage in the presence of a polymer which contains, as typical polymerized constituents, units of the formulae ##STR1## where R1 and R2... | 03/24/1992 |
| 5082527 | Nitrogen-containing polymeric compounds Crosslinkable compounds obtainable by reaction of water-soluble mono- or polyamines with 2,3-epoxypropyl sulphonates or 2-hydroxypropyl 1,3-bis-sulphonates or their mixtures with up to 15 mol % of an epihalogenohydrin or dihalogenohydrin are used for impa... | 01/21/1992 |
| 5043370 | Polyalkylene imide of high brightness and retention characteristics and low toxicity and method of increasing paper whiteness A polyalkylene imide of high brightness and retention characteristics and low biological toxicity comprises a polyalkylene imine having covalently bound thereto at least one residue of a compound of the formula ##STR1## wherein R1 is H, (C... | 08/27/1991 |
| 5039787 | Method for production of cationic water-soluble resin and water-treating agent containing said resin based on imine modified polyethylene glycol halohydrin ethers Methods are disclosed for the production of (I) a cationic water-soluble resin by the reaction of a polyethylene glycol polyhalohydrin ether resulting from the reaction between polyethylene glycol and an epihalohydrin with an aziridine compound and (II) a... | 08/13/1991 |
| 5034097 | Epoxidized polyamide wet strength resins containing lecithin A composition comprising epoxidized polyamide wet strength resin and lecithin. The composition provides wet strength to paper and molded pulp products and at the same time increases the internal bonding of the paper or molded pulp products.... | 07/23/1991 |
| 5032226 | Base paper for photographic layer support A photographic layer carrier, made of a paper coated with polyolefin resin with improved sheet structure and improved strength values, comprises a base paper which includes, in additon ot hydrophobic-properties conveying sizing agent and a cationic wet-pr... | 07/16/1991 |
| 5015245 | Disposable sanitary articles Disposable sanitary articles comprise paper treated with polycationic latexes as wet-strength agents. The paper has sufficient wet strength that it can serve as the backsheet for absorbent articles, garments, and the like. Thus, KYMENE is reacted, for exa... | 05/14/1991 |
| 4994146 | Creping adhesive utilizing polymer-polymer complex formation In the manufacture of creped tissue products, the adhesion between the tissue sheet and the creping cylinder can be increased by applying one component of an adhesive complex to the sheet and another component of an adhesive complex to the creping cylinde... | 02/19/1991 |
| 4981591 | Cationic charge modified filter media The media comprises cellulosic fiber and silica based particulate or fiber filter elements and a charge modifying amount of a cationic charge modifying system bonded to the surfaces thereof. A component of the charge modifying system is a primary charge modify... | 01/01/1991 |
| 4973641 | Polysaccharide graft copolymers containing reactive aminoethyl halide group A polysaccharide graft copolymer containing a reactive aminoethyl halide group is provided, said copolymer represented by: Sacch--g--(M)a --(T)b where Sacch is a polysaccharide base substrate, M is a repeating unit of the formula: ##... | 11/27/1990 |
| 4969976 | Pulp dewatering process Dry market pulp is made by shearing a cellulosic suspension and draining it through a screen to form a pulp sheet which is then dried, and the productivity of the process is increased by adding a water soluble cationic polymer before the shearing and bent... | 11/13/1990 |
| 4964954 | Process for the production of paper A method for the production of paper by forming and dewatering a suspension of papermaking fibres on a wire. The formation and dewatering take place in the presence of a cationic polymeric synthetic retention agent, preferably a cationic polyacrylamide, a... | 10/23/1990 |
| 4964955 | Method of reducing pitch in pulping and papermaking operations A method of and substances for reducing pitch in pulping and papermaking operations, particularly in furnishes made by mechanical pulping processes containing wood pulp in amounts greater than about 10% by weight, are disclosed. The method comprises addin... | 10/23/1990 |
| 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 |
| 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 |
| 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 |
| 4929309 | Nitrogen-containing water-soluble polymeric compounds Water-soluble crosslinkable polymeric compounds which are obtainable by reaction of reaction products, containing halogenohydrin groups, of ammonia or mono- or polyamines and an epihalogenohydrin with inorganic bases and subsequent reaction of the resulti... | 05/29/1990 |
| 4925528 | Manufacture of wetlaid nonwoven webs A method for forming a fabric web by wet-laying fibers on paper-making equipment, the web comprising staple length natural or synthetic fibers and optionally wood cellulose papermaking fibers and an adsorbed polymeric surface active agent. The method comp... | 05/15/1990 |
| 4925530 | Loaded paper Aqueous suspensions of papermaking fibres and filler are each separately treated with an anionic or a cationic polymer, after which the filler (preferably) or the papermaking fibre is treated with a polymer of opposite charge to that used in the initial t... | 05/15/1990 |
| 4913775 | Production of paper and paper board Paper or paper board is made by passing an aqueous cellulosic suspension through a centriscreen or other shear device and then draining the purified suspension, and an improved combination of retention, drainage, drying and formation is achieved by adding... | 04/03/1990 |
| 4895621 | Water soluble thermosetting resin, process for its production, paper sizing composition and paper sizing process A water soluble thermosetting resin useful as a promoter for paper sizing is described. Polyallylamine or a modified polyallyamine is reacted with epichlorohydrin and/or formaldehyde. The formaldehyde may be reacted with the polyallylamine in the presence... | 01/23/1990 |
| 4892620 | Diurethane latex and processes A sizing agent for paper consisting essentially of a latex consisting essentially of at least one diurethane dispersed in an aqueous medium, said diurethane being of the formula: ##STR1## in which: (a) R1, R2, R5 and ... | 01/09/1990 |
| 4882221 | Chemically treated paper products - towel and tissue Disclosed are soft, absorbent and bulky cellulosic fibrous webs which have been treated so that they impart a soothing or emollient effect to the human skin when used for wiping or drying while essentially retaining their water-absorbent property and stre... | 11/21/1989 |
| 4880498 | Dry strength resin of amino/aldehyde acid colloid with acrylamide polymer, process for the production thereof and paper produced therefrom Dry strength resins are prepared by reacting acrylamide polymers with amino/aldehyde resin acid colloids during the formation of the colloid. The resultant copolymers are useful as dry strength resins in the formation of paper.... | 11/14/1989 |
| 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 |
| 4874466 | Paper making filler composition and method An improved paper making filler composition is comprised of the combination of a paper making pigment admixed with a cationic water soluble polymer in an aqueous dispersion, wherein the cationic water soluble polymer is present in said dispersion in the a... | 10/17/1989 |
| 4866151 | Polysaccharide graft polymers containing acetal groups and their conversion to aldehyde groups Polysaccharide graft polymers which comprise an acetal-containing or aldehyde-containing homopolymer or copolymer grafted to a polysaccharide base have been prepared. The monomer repeating units in the homopolymer are derived from one or more ethylenicall... | 09/12/1989 |
| 4859340 | Filter sheet A filter media sheet comprising fine particulate and a self-bonding matrix of cellulose fiber, the surfaces of at least one of which are modified with a polyamido-polyamine epichlorhydrin cationic resin, the matrix incorporating beaten cellulose fiber to ... | 08/22/1989 |
| 4853431 | Method for stabilizing aqueous solutions of cationic thermosetting polyamide-epichlorohydrin resins A process for stabilizing an aqueous solution of a thermosetting polyamide-epichlorohydrin resin useful for imparting wet strength to paper by adding a mixture of a weak acid and a strong acid to said aqueous solution.... | 08/01/1989 |
| 4846932 | Water setting paper Water setting paper (high water-absorbency material) comprised of pulp fiber, water-soluble resin and high wate-absorbency resin is produced in sheet form for use in urine containers or portable toilets. Water setting paper or the high water-absorbency sh... | 07/11/1989 |
| 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 |
| 4822452 | Manufacture of wet laid nonwoven webs A method for forming a fibrous web by wet-laying fibers on paper-making equipment, the web comprising staple length natural or synthetic fibers and wood cellulose paper-making fibers wherein a water furnish of the fibers is made up with an associative thi... | 04/18/1989 |
| 4808267 | Waterproof photographic paper support A waterproof photographic paper support, which is coated with a polyolefin resin, is provided. The paper itself is formed from a particular paper pulp composition which contains fatty acids and/or fatty acid salts and an aluminum salt, as well as, if nece... | 02/28/1989 |
| 4799996 | Metallizable substrate composites and printed circuits produced therefrom Substrate composites, well adopted for the production of metallized printed circuits and facilely prepared by, e.g., papermaking procedures, include a central core layer comprising fibrous cellulosic material or flaked mica within a matrix of a thermosett... | 01/24/1989 |
| 4795531 | Method for dewatering paper A method of enhancing the dewatering of paper during the papermaking process which includes adding a low molecular weight cationic coagulant and then colloidal silica and a high molecular weight flocculant.... | 01/03/1989 |
| 4785055 | Process for the preparation of N-haloamide polymers Aqueous solutions of polyacrylamides are acidified and then reacted with halogen gas or hypohalites to provide N-halogenated polymers. The product of the process are good wet strength additives for paper made from aqueous pulps of paper making fibers.... | 11/15/1988 |
| 4774272 | Composite sheet material for storage envelopes for magnetic recording media There is provided a composite sheet material for fabrication of storage envelopes for magnetic recording media, e.g., floppy diskettes. The material has a low debris count, and a fast rate of static decay as well as high stiffness and strength.... | 09/27/1988 |
| 4769274 | Relatively inexpensive thermoformable mat of reduced density and rigid laminate which incorporates the same A relatively inexpensive mat is provided which through the application of heat and pressure readily can be densified to form rigid shaped articles having a reduced overall density. The mat is substantially free of a binder (e.g., a latex binder) and consi... | 09/06/1988 |
| 4765867 | Pitch control process utilizing quaternized polyamine ionene polymer The invention relates to a process for controlling pitch deposition from pulp in papermaking systems which comprises adding to the pulp an effective amount of a water-soluble quaternized polyamine ionene polymer.... | 08/23/1988 |
