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| Number | Title | Issue Date |
| 7258763 | Temporary wet strength additives Temporary wet strength additives, more particularly, temporary wet strength additives comprising a polymer backbone, wherein the polymer backbone comprises a co-crosslinking monomeric unit, preferably a reversible co-crosslinking monomeric unit, especially in the pr... | 08/21/2007 |
| 7217339 | Fibrous structures exhibiting improved wet strength properties Fibrous structures and/or sanitary tissue products comprising such fibrous structures, more particularly to fibrous structures and/or sanitary tissue products that exhibit improved wet strength properties, especially temporary wet strength properties, as compared to... | 05/15/2007 |
| 7141181 | Composition comprising amphoteric polymeric flocculants A composition is provided which comprises amphoteric polymers comprising, as constituent monomer units, a cationic monomer unit, an anionic monomer unit, and optionally a nonionic monomer unit and having a 0.5% salted viscosity of 10 to 120 mPa·s, wherein said amph... | 11/28/2006 |
| 7125469 | Temporary wet strength resins Temporary wet strength resins, more particularly, temporary wet strength resins comprising a polymer backbone, wherein the polymer backbone comprises a co-crosslinking monomeric unit, preferably a reversible co-crosslinking monomeric unit, especially in the presence... | 10/24/2006 |
| 6830657 | Hydrophobic cationic dispersions stabilized by low molecular weight maleimide copolymers, for paper sizing The invention concerns a method for obtaining an aqueous dispersion of hydrophobic polymers dispersed in the form of particles with mean diameter less than 100 nm stablized soley with a macromolecular surfactant based on low molecular weight styrene/maleic anhydride... | 12/14/2004 |
| 6267844 | Process for production of paper using thioether compounds A paper production process, characterized by the process step of providing to the paper at some point in the production process a compound of formula (I) ##STR1## which reduces the tendency of the obtained paper products, particularly those made from... | 07/31/2001 |
| 6245874 | Process for making repulpable wet and dry strength paper A process for making paper with increased wet and dry strength by incorporating into the pulp suspension an ionic thermosettable resin which is the reaction product of dialdehyde and epihalohydrin, or epihalohydrin equivalent, with a copolymer containing ... | 06/12/2001 |
| 6235835 | Polymer-modified anionic starch, method for its production, and its use Starch is modified with at least one cationic polymer P) and the modified starch is prepared by a process in which a) an anionically modified starch A) is reacted with a cationic polymer P) or b) a natural starch B) or a starch C) which has not been anionicall... | 05/22/2001 |
| 6162328 | Method for surface sizing paper with cellulose reactive and cellulose non-reactive sizes, and paper prepared thereby There is disclosed a method for sizing paper by adding to the surface of the paper a sizing composition comprising cellulose reactive and cellulose non-reactive size. The sized paper performs better in ink jet printing than does paper that is the same exc... | 12/19/2000 |
| 6117525 | Multi-elevational tissue paper containing selectively disposed chemical papermaking additive A chemically enhanced paper structure having a discrete pattern of a chemical composition is disclosed. The paper structure comprises a cellulose substrate, such as tissue paper. The substrate has a topography comprising at least two different elevations.... | 09/12/2000 |
| 6114435 | Preparation of aqueous solutions of polymers containing vinylamine units, which solutions have a long shelf life, and their use Solutions of polymers containing vinylamine units, which solutions have a long shelf life, are prepared by hydrolyzing polymers containing N-vinylcarboxamide units with acids in an aqueous medium and removing the carboxylic acids eliminated from the polym... | 09/05/2000 |
| 5840403 | Multi-elevational tissue paper containing selectively disposed chemical papermaking additive A chemically enhanced paper structure having a discrete pattern of a chemical composition is disclosed. The paper structure comprises a cellulose substrate, such as tissue paper. The substrate has a topography comprising at least two different elevations.... | 11/24/1998 |
| 5389203 | Paper-making additives comprising cationic polymers Disclosed herein is a paper-making additive.comprising a specified cationic polymer having an amidine structure. The cationic polymer additive for paper-making according to the present invention has 20 to 90% by mole of units represented by the formula (1... | 02/14/1995 |
| 5156718 | Paper mats A paper mat is made from an aqueous slurry or dispersion of kraft wood pulp, a large amount of finely divided inorganic pigments and as a binder an anionic latex of a copolymer of at least one conjugated diene monomer, at least one vinyl substituted aroma... | 10/20/1992 |
| 5131981 | Coloring paper The wet-end coloring of paper with pigments and fixers is carried out by a process in which the pigment and fixer are added simultaneously to the paper pulp to be colored, and the fixer used is a cationic fixer, in an amount of from 0.01 to 3% by weight, ... | 07/21/1992 |
| 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 |
| 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 |
| 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 |
| 4784724 | Making paper which has a high dry strength Paper having a high dry strength is made using water-soluble homopolymers of salts or quaternary 1-vinyl-2-imidazolines and copolymers of these salts or quaternary compounds with acrylamide and/or methacrylamide as agents for increasing the dry strength o... | 11/15/1988 |
| 4772359 | Production of paper, board and cardboard Paper, board and cardboard are produced by draining a pulp slurry in the presence of high molecular weight, water-soluble polymers of N-vinylamides as drainage aids, retention agents and flocculants. These polymers are particularly effective in a pulp slu... | 09/20/1988 |
| 4770743 | Engine size for paper, based on fatty alkyl diketenes and cationic polyacrylamides Engine sizes for paper are based on aqueous emulsions of C14 -C20 -alkyl diketenes and cationic copolymers of (a) from 40 to 99% by weight of acrylamide and/or methacrylamide, (b) from 1 to 40% by weight of an unsubstituted or substituted ... | 09/13/1988 |
| 4643801 | 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... | 02/17/1987 |
| 4603176 | Temporary wet strength resins Temporary wet strength resin polymers having the formula ##STR1## wherein A is a polar, non-nucleophilic unit which does not cause said resin polymer to become water-insoluble; B is a hydrophilic, cationic unit which inparts a positive charge to the ... | 07/29/1986 |
| 4515658 | Retention aids Certain copolymers with lower alkyl quaternary ammonium salts of 1-acryloyl-4-methyl piperazine, particularly copolymers containing acrylamide, give outstanding results as fine and filler retention agents used in the manufacture of paper.... | 05/07/1985 |
| 4416729 | Ammonium polyamidoamines Wet strength of paper is effectively increased by contacting paper pulp with an ammonium polyamidoamine having cross-linking functionality such as epoxy or azetidinium and subjecting a wet sheet of such pulp to conditions sufficient to cure the polyamidoa... | 11/22/1983 |
| 4406737 | Creping paper using cationic water soluble addition polymer A procedure is disclosed for creping paper without conferring wet strength or sizing thereto.... | 09/27/1983 |
| 4373992 | Non-asbestos flooring felt containing particulate inorganic filler, a mixture of fibers and a binder Flooring felt containing glass fibers, cellulosic fibers, synthetic fibers, particulate inorganic filler, latex binder and calcium hydroxide.... | 02/15/1983 |
| 4269657 | Fibrous product containing cellulosic fibers, its method of preparation and its use, in particular in the field of covering panels, in lieu of asbestos The present invention refers to a fibrous product containing cellulosic fibers, which can replace asbestos and comprises in the form of a sheet slightly refined cellulosic fibers in association if the occasion arises, with other fibers, at least one flocc... | 05/26/1981 |
| 4268352 | Method of reducing soluble starch in broke repulping using a dual polymer combination This invention is a method of increasing the amount of retention of deposited starch and pigment on fibers in broke liquid which consists of adding to said liquid a combination dosage of a DMA-epichlorohydrin polymer together with a second polymer consist... | 05/19/1981 |
| 4235982 | Organic pigments Disclosed are novel organic pigments adapted particularly for use as fillers for paper. The organic pigments are finely divided particles obtained by graft copolymerizing an ethylenically unsaturated monomer, such as styrene, onto a watersoluble cationic ... | 11/25/1980 |
| 4233411 | Cationic polymeric composition for imparting wet and dry strength to pulp and paper A blend which contains homopolymers useful for imparting wet and dry strength to pulp and paper fibers which comprises a major amount of non-ionic polyacrylamide, together with glyoxal to impart crosslinking and a cationic regulator selected from the grou... | 11/11/1980 |
| 4230525 | Process for improving qualities of paper A process for improving the qualities of paper which comprises making co-exist (a) a water-soluble polymer containing hydrazide group or its adduct with a water-soluble inorganic salt of an alkaline earth metal and (b) a heavy metal ion capable of chelati... | 10/28/1980 |
| 4224103 | Bonding composition for incombustible fibrous materials A bonding composition for incombustible fibrous materials comprising (a) a water-soluble polymer containing hydrazide groups or its adduct with a water-soluble alkaline earth metal salt of an inorganic acid and (b) a heavy metal ion capable of forming che... | 09/23/1980 |
| 4198269 | Quaternary ammonium salts of epihalohydrin polymers as additives for fibrous cellulosic materials Properties of fibrous materials, e.g., wet and dry strength of paper, are significantly improved by incorporating a cationic polyether into a fibrous material such as pulp. The polyether bears ammonium salt groups exemplified by the formula: ##STR1##... | 04/15/1980 |
| 4178204 | Wet-strength of wet glass fiber mats by treatment with anionic polyelectrolytes In accordance with the present invention, there is provided herein a method of increasing the strength of wet glass fiber mats prepared by the wet-laid process. The wet-strength of such freshly prepared glass fiber mats are improved in this invention by t... | 12/11/1979 |
| 4154646 | Preparation of hydrophilic styrene maleic anhydride copolymer fibers for use in papermaking Hydrophilic fibers may be prepared by discharging a heated and pressurized dispersion of a styrene-maleic anhydride copolymer into a zone of reduced temperature and pressure, and then modifying the fibers so produced by treatment with an aqueous admixture... | 05/15/1979 |
| 4154647 | Preparation of hydrophilic polyolefin fibers for use in papermaking Hydrophilic polyolefin fibers may be prepared, for example, by discharging a heated and pressurized solution of an anionic polyolefin composition containing carboxylic functionality into a zone of reduced temperature and pressure, and then modifying the f... | 05/15/1979 |
| 4079044 | Glyoxal modified poly(ଲ-alanine) strengthening resins for use in paper Novel resins, useful as strengthening resins for imparting dry and temporary wet strength to paper, are disclosed. The resins are prepared by reacting branched water-soluble poly(ଲ-alanine) with glyoxal.... | 03/14/1978 |
| 4070236 | Paper manufacture with improved retention agents DISCLOSED is a process for the production of paper and paper-like products which comprises the step of incorporating in the pulp a retention agent comprising a polyalkylene oxide of molecular weight in excess of 1 million and a phenol- or naphthol-formald... | 01/24/1978 |
| 4057533 | Process for preparation of quaternized cationic vinyllactam-acrylamide copolymers A composition of matter which is useful as a flocculant for aqueous dispersions containing suspended solid particles and as a filler retention aid in paper-making, consisting essentially of quaternized cationic vinyllactam-acrylamide copolymer containing ... | 11/08/1977 |
