Solid Polymer Or Specified Intermediate Condensation Product Derived From At Least One Oxygen-containing Reactant And Which Is Devoid Of A Fused Ring Or Bridged Ring System Patents (Class 524/4)
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Patent number: 5233012Abstract: Novel condensates comprising bisphenols and aromatic aminosulfonic acids, in particular, novel 4-aminobenzenesulfonic acid-2,2-bis (hydroxyphenyl)propaneformaldehyde condensates, and methods for their production are disclosed. The novel condensates are useful as a dispersant for disperse dyes, an additive for carbonaceous fine powder-water slurries and as a water reducing agent for cement.Type: GrantFiled: June 8, 1992Date of Patent: August 3, 1993Assignee: Sanyo-Kokusaku Pulp Co., Ltd.Inventors: Masanobu Kawamura, Shinji Hamada, Takashi Date, Toshihiro Sugiwaki, Nobuhiro Hanada
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Patent number: 5227413Abstract: The invention provides novel ionomer polymers and cements comprising .beta.-dicarbonyl groups. The invention has particular utility as filling materials for restoring teeth and for cementing inlays and crowns into place in the tooth, providing a base or a lining in a tooth cavity, and as adhesives or sealants. The invention provides ionomer cement systems that achieve increased resistance to water absorption and solubility.Type: GrantFiled: February 27, 1992Date of Patent: July 13, 1993Assignee: Minnesota Mining and Manufacturing CompanyInventor: Sumita B. Mitra
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Patent number: 5215827Abstract: Precast concrete which is coated with a copolymer A with a glass transition temperature of rom -25.degree. to +30.degree. C. and composed ofa) from 0.1 to 10% by weight of a monomer of the formula I ##STR1## where R.sup.1 and R.sup.2 are each --H or C.sub.1 -C.sub.4 -alkyl, R.sup.3 is a bridge of from 1 to 20 carbons,R.sup.4 is --C(O)R.sup.6, --C(O)OR.sup.6 or -CNR.sup.5 is --H, --C(OR)R.sup.9, --C(O)OR.sup.9 or --CNX is --O-- or --NR.sup.7 --,Z is a single bond, --CH.sub.2 --, --O--, --NR.sup.8 -- or --O--C(O)-- andR.sup.6, R.sup.7, R.sup.8 and R.sup.9 are each --H, alkyl, aryl, alkaryl or aralkyl of up to 12 carbons,b) from 85 to 99.Type: GrantFiled: December 4, 1991Date of Patent: June 1, 1993Assignee: BASF AktiengesellschaftInventors: Bernhard Dotzauer, Eckehardt Wistuba, Manfred Schwartz, Rolf Petri, Bertold Bechert, Hans-Juergen Denu
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Patent number: 5192366Abstract: A cement admixture comprising a polymer latex and a water reducing agent as effective components, wherein the polymer latex comprises a copolymer of monomers comprising ethylene, vinyl acetate and an acrylic ester, and an emulsion stabilizer, said emulsion stabilizer being a surfactant.Type: GrantFiled: December 4, 1990Date of Patent: March 9, 1993Assignee: Denki Kagaku Koygo Kabushiki KaishaInventors: Asaaki Nishioka, Etsuo Sakai, Tomohiro Kaneko, Masaki Ogasawara
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Patent number: 5185389Abstract: A modified mortar or concrete composition in which a polymeric binding material is combined with sand, cement, and fine fillers. Use of the higher than previously considered functional ratio of latex binding material to cement permits the resulting mortar or concrete composition to increase the percentage of fine fillers, and reduces the amount of voids as a result of less water loss. The latex material partially fills the voids becoming a part of the structure of the system. This leads to a higher degree of flexibility and coherence of the system.Type: GrantFiled: July 1, 1991Date of Patent: February 9, 1993Assignee: GemEng, Ltd.Inventor: Riley Victor
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Patent number: 5164431Abstract: Provided is a process for producing molded articles having excellent flexural strength, flexibility and dimensional stability, which comprises autoclave-curing at not lower than 100.degree. C. an aqueous composition comprising a hydraulic material (A) and a polyvinyl alcohol (B) powder, said polyvinyl alcohol (B) powder being contained in an amount of 0.1 to 20% by weight based on the weight of said hydraulic material (A).Also provided are molded articles comprising a hydraulic material (A) and a polyvinyl alcohol (B), said polyvinyl alcohol (B) being contained in an amount of 0.1 to 20% by weight based on the weight of said hydraulic material (A), said molded article having a structure comprising said polyvinyl alcohol (B) having once dissolved and then solidified being dispersed therein in the form of islands. These molded articles have excellent flexural strength, flexibility and dimensional stability.Type: GrantFiled: December 6, 1990Date of Patent: November 17, 1992Assignee: Kuraray Co., Ltd.Inventors: Akio Mizobe, Kenji Saimen, Sotaro Itadani, Ken Yuki
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Patent number: 5153241Abstract: Composite materials based celluyloses grafted with titanium coupling agents reinforce polymeric resins, cement and gypsum. Processes for preparing said composites are disclosed.Type: GrantFiled: August 8, 1988Date of Patent: October 6, 1992Inventor: Alphons D. Beshay
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Patent number: 5116421Abstract: A fluid loss control additive for use in well cementing operations wherein the downhole temperature ranges from about 200.degree. to about 500.degree. F. The additive is a polymer comprised of 2-acrylamido-2-methyl propane-3-sulphonic acid, N-vinyl,-N-methylacetamide, in the presence or absence of arcylamide. This additive is also effective in saltwater cement slurries.Type: GrantFiled: December 12, 1990Date of Patent: May 26, 1992Assignee: The Western Company of North AmericaInventor: Kalyan K. Ganguli
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Patent number: 5092933Abstract: Concrete/mortar is manufactured with a small amount of water by using a dry clathrate water mixture. The dry clathrate water is used in a state wherein the water is impregnated into a water absorbent polymer.Type: GrantFiled: March 18, 1991Date of Patent: March 3, 1992Assignees: Mitsui Kensetsu Kabushiki Kaisha, Shiiai Kemutekku Kabushiki Kaisha, Oosaka Yuuki Kagaku Kogyo Kabushiki KaishaInventors: Tadashi Okamoto, Toru Sato, Taiji Kanbayashi, Chuzo Kato
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Patent number: 5026576Abstract: A method and composition are provided for creating smooth surfaces on building structures, particularly concrete structures. A first constituent is prepared by mixing together quantities of acrylic mortar admix, concrete plaster adhesive, joint compound, hydrated lime and water. The first constituent is mixed with Portland cement at the construction site. The resultant mixture is smoothed onto concrete or wooden surfaces of a building structure, and dries in about an hour to produce a smooth, hard surface.Type: GrantFiled: November 16, 1989Date of Patent: June 25, 1991Inventors: Francis S. Benvenuto, Jeff S. Silva
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Patent number: 5021093Abstract: Composite materials based on cement or gypsum materials reinforced by mixing with cellulosic fibers grafted with silylating agents. Processes for preparing these reinforced composites are also disclosed.Type: GrantFiled: June 9, 1988Date of Patent: June 4, 1991Inventor: Alphons D. Beshay
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Patent number: 4968561Abstract: A synthetic fiber suited for use as a reinforcement for cement mortar or concrete as derived from monofilaments having a tensile strength of not less than 80 kg/mm.sup.2, Young's modulus of not less than 2,300 kg/mm.sup.2, a flat cross section in which the minor axis-to-major axis ratio is 1:2 to 1:10, and a fineness of 1,000-9,000 denier, and being cut to a fiber length such that the aspect ratio (the value obtained by dividing the fiber length by the diameter of a circle equivalent in area to the cross section of the fiber) amounts to 20-150, in particular a polyvinyl alcohol fiber having the above-mentioned characteristic features, shows good dispersibility in cement mortar and produces very good reinforcing effect. Materials of construction which are excellent in workability and postcure strength can be obtained by incorporating the above-mentioned fiber to cement and the like.Type: GrantFiled: April 4, 1988Date of Patent: November 6, 1990Assignee: Kuraray Company LimitedInventors: Akio Mizobe, Masaki Okazaki, Mitsuro Mayahara, Junichi Yoshinaka
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Patent number: 4960465Abstract: Hydraulic cement compositions are disclosed containing a hydraulic cement and a graft copolymer, the graft copolymer containing a polyether backbone and side chains prepared by polymerization of an ethylenically unsaturated monomers. The graft copolymer functions as a plasticizer in the cement composition.Type: GrantFiled: November 23, 1987Date of Patent: October 2, 1990Assignee: W. R. Grace & Co.Inventor: Ahmad Arfaei
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Patent number: 4957951Abstract: The invention concerns a process to manufacture a building material mixture from a reaction resin, a hardener, cement, an aggregate containing coarser and finer parts and water. To produce a storage stabile, dry premix the coarser parts of at least one partial amount of the aggregate are mixed with the liquid resin or the liquid hardener such, that droplets or films of the resin, resp. hardener can adhesively deposit themselves on the surfaces of the coarsely-grained aggregate, subsequently the finer parts of the aggregate are added, which cover the remaining free surfaces of the droplets, resp. films, or that for the manufacture of a storage stabile, dry mix an amount of liquid resin or hardener is cooled until the amount solidifies, in this state is ground to powder and is mixed with the finest fraction of the aggregate before the powdery resin, resp. hardener again return to its liquid state.Type: GrantFiled: June 30, 1986Date of Patent: September 18, 1990Inventor: Heinz Marohn
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Patent number: 4946506Abstract: An additive combination for hydraulic cement compositions is provided which advantageously provides corrosion inhibition and set acceleration, in combination with a high level of fluidity and retention of fluidity over a desired period of time. The cement additive combination comprises an alkali or alkaline earth metal nitrite and a graft copolymer plasticizer comprising a polyether backbone and side chain polymers formed by polymerization of ethylenically unsaturated monomers.Fluid hydraulic cement compositions are further provided comprising these additive combinations.Type: GrantFiled: September 7, 1989Date of Patent: August 7, 1990Assignee: W.R. Grace & Co.-Conn.Inventors: Ahmad Arfaei, Neal S. Berke, Michael P. Dallaire, Maria Hicks
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Patent number: 4840672Abstract: Lightweight insulating boards in accordance with the present invention comprise Portland cement, fibers and fillers including:(a) 50-75% by weight of cement,(b) 0-5% by weight of cellulose fibers,(c) 0.5-4% by weight of alkali-resistant fiber material,(d) 5-20% by weight of mica,(e) 5-20% by weight of light filler and(f) 8-25% by weight of hydrated lime.They are shaped into boards from a suspension and are set at least 15 days, and preferably 28 days. The insulating boards of the present invention meet all of the requirements set for such materials regarding flexural strength, incombustibility, and the like.Type: GrantFiled: March 12, 1987Date of Patent: June 20, 1989Assignee: Redco N.V.Inventor: Emile Baes
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Patent number: 4814014Abstract: Hydraulic cement compositions are disclosed containing a hydraulic cement and a graft copolymer, the graft copolymer containing a polyether backbone and side chains prepared by polymerization of an ethylenically unsaturated monomers. The graft copolymer functions as a plasticizer in the cement composition.Type: GrantFiled: December 9, 1986Date of Patent: March 21, 1989Assignee: W. R. Grace & Co.Inventor: Ahmad Arfaei
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Patent number: 4778529Abstract: An uncured cementitious composition comprising in admixture:(a) at least one hydraulic cement;(b) at least one reactive water-soluble polymer which is capable of providing a viscous solution in water at low addition levels;(c) water in an amount of from 10 to 25 parts by weight of water per 100 parts by weight of the cement; and(d) a water soluble cross-linking agent capable of effecting chemical cross-links between molecules of the said polymer in the presence of the cement and water.Type: GrantFiled: October 14, 1986Date of Patent: October 18, 1988Assignee: Redland Technology LimitedInventors: Howard A. Barker, Eric A. Rirsch, John Maxfield
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Patent number: 4778527Abstract: There is provided an anti-corrosive mixture for iron and steel surfaces which comprises (a) a mixture composed of 5 to 25% by weight (solid basis) of one or more kinds of aqueous emulsions or aqueous latices of styrene resin and 5 to 15% by weight (solid basis) of aqueous emulsion of asphalt, and (b) 60 to 90% by weight of at least one kind of inorganic powder selected from the group consisting of silica stone, silica sand, granite, andesite, shale, kaolin, feldspar, talc, mica, fly ash, slag, iron oxide and graphite. The inorganic powder may also contain 1 to 10% by weight of limestone powder. There is also provided a process for the manufacture of steam-cured aerated light-weight concrete while applying the above anti-corrosive mixture to the reinforcing steel bars used in that process.Type: GrantFiled: December 29, 1986Date of Patent: October 18, 1988Assignee: Internationella Siporex ABInventors: Takahisa Ikunaga, Maho Nakatsumi
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Patent number: 4772330Abstract: A process for producing a low water-absorbing artificial lightweight aggregate, which comprises:granulating a starting powdery material containing coal ash, having such a particle size distribution that a residue on a 297 .mu.m standard wire sieve is not more than 1 wt. %, and 1 to 20 parts by weight of a hydraulic material per 100 parts by weight of said coal ash in the presence of water;curing the resulting granules for a period of not shorter than 20 hours; orheat-treating the resulting granules at a temperature of not higher than 700.degree. C. for a period of not shorter than 30 minutes; and,calcining the granules at a temperature of 1,000.degree. to 1,500.degree. C.Type: GrantFiled: February 13, 1987Date of Patent: September 20, 1988Assignee: Ube Industries, Ltd.Inventors: Waichi Kobayashi, Koji Usui, Kazuhiro Iwata
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Patent number: 4758610Abstract: A soldified and particulated resin and a substantially solidified-state-maintained water are mixed with cement and after the mixing is finished, the solidified resin and water are liquefied and the cement is hydrated with the liquefied water. Since the resin maintains the solidified and particulated state and the water also maintains the solidified state during mixing, the mixing work of cement, water and resin is uniformly performed.Type: GrantFiled: January 9, 1987Date of Patent: July 19, 1988Assignee: Mitsui Kensetsu Kabushiki KaishaInventors: Okamoto Tadashi, Utsunomiya Toru, Tamura Tomio, Matsubara Sumiyuki, Hasuo Koichi
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Patent number: 4746364Abstract: A flowing concrete and a process of producing the same. A cement, water, aggregates, a superplasticizer and a segregation-controlling agent are kneaded into a base concrete having a water-cement ratio of about 35% or less, the segregation-controlling agent contained in an amount of about 0.02 to about 0.1 wt. %, based on the water and including a methylcellulose compound, and the superplasticizer contained in an amount of about 0.25 to about 0.6 wt. % based on the cement. Then, about 0.25 to about 0.6 wt. %, in terms of the solid, of a flowing agent based on the cement is added to the base concrete, the flowing agent including a sulfonic acid/formaldehyde high condensate and a polyvinyl alcohol. Further, the base concrete with the flowing agent is kneaded into the flowing concrete.Type: GrantFiled: July 10, 1986Date of Patent: May 24, 1988Assignee: Shimizu Construction Co., Ltd.Inventors: Toru Kawai, Takeji Okada, Gaku Matsumoto
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Patent number: 4717762Abstract: Electroactive polymers of the structure and formula ##STR1## in their neutral and ionized forms, where the backbone group R.sub.b is selected from or is a combination of five- and six-membered rings capable of aromatic and quinonoid bonding structures, R.sub.s is selected from aliphatic, aromatic and heterocyclic groups, x and y, are positive integers from 1 to 5 and m is a positive integer from 1 to about 10,000, together with a method of making them are disclosed.Type: GrantFiled: September 8, 1986Date of Patent: January 5, 1988Assignee: Honeywell Inc.Inventor: Samson A. Jenekhe
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Patent number: 4708978Abstract: There is disclosed a protective coating composition suitable for application to surfaces of concrete, wood or metal to provide each surface with increased skid and chemical resistance. The composition comprises a blend of hydraulic cement in the range of 5 to 18 wt., 0.5 to 6.0 wt. % polyvinyl acetate, the balance silica sand, the blend having admixed therewith a solution comprised 10 to 70 wt. % of a vinyl acetate-ethylene copolymer, the remainder water.Type: GrantFiled: June 16, 1986Date of Patent: November 24, 1987Inventor: Jack L. Rodgers
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Patent number: 4655838Abstract: When a cement-based mixture such as cement paste, mortar and concrete is admixed with the inventive cement additive composition, the cement-based mixture is imparted with lastingly improved flowability and hence workability. The cement additive composition of the invention comprises (a) 100 parts by weight of a saponified product of (a half ester of) a copolymer of styrene and maleic acid and (b) from 5 to 900 parts by weight of a flowability improving agent such as a salt of a condensation product of naphthalene sulfonic acid with formaldehyde, salt of a condensation product of an alkylnaphthalene sulfonic acid with formaldehyde, salt of a condensation product of a sulfonated creosote oil with formaldehyde and the like.Type: GrantFiled: August 26, 1985Date of Patent: April 7, 1987Assignee: Idemitsu Petrochemical Co., Ltd.Inventors: Yasuharu Koga, Fumitada Yamamoto, Hideharu Shimokawa
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Patent number: 4617332Abstract: Compositions containing crystalline, long chain, alkyl hydrocarbons as phase change materials including cementitious compositions containing the alkyl hydrocarbons neat or in pellets or granules formed by incorporating the alkyl hydrocarbons in polymers or rubbers; and polymeric or elastomeric compositions containing alkyl hydrocarbons.Type: GrantFiled: August 31, 1984Date of Patent: October 14, 1986Assignee: University of DaytonInventors: Ival O. Salyer, Charles W. Griffen
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Patent number: 4614755Abstract: There is disclosed a protective, waterproof coating composition suitable for application to surfaces of concrete, wood or metal to provide each surface with increased abrasion and chemical resistance. The composition comprises a blend of hydraulic cement in the range of 5 to 18 wt. %, 200 mesh limestone in the range of 20 to 50 wt. %, 0.5 to 6.0 wt. % polyvinyl acetate, the balance of the blend 50 mesh limestone, the blend having admixed therewith a solution comprised to 30 to 60 wt. % of a vinyl acetate-ethyl copolymer emulsion, the remainder water.Type: GrantFiled: June 17, 1985Date of Patent: September 30, 1986Inventor: Jack L. Rodgers
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Patent number: 4587283Abstract: Cement slurries for deep holes, with a content of copolymers which are composed of 5-95% by weight of groups of the formula ##STR1## in which R.sub.1 is hydrogen or methyl,R.sub.2 is C.sub.2 -C.sub.10 -alkylene andMe is ammonium, lithium, sodium or potassium, of 5-60% by weight of groups of the formula ##STR2## in which R.sub.3 is hydrogen, --CH.sub.3 or C.sub.2 H.sub.5 andR.sub.4 is --CH.sub.3 or C.sub.2 H.sub.5, orR.sub.3 and R.sub.4 together are a propylene group which, with incorporation of the radical ##STR3## forms a pyrrolidone radical, and of 0-90% by weight of groups of the formula ##STR4## in which R.sub.6 is hydrogen or methyl andR.sub.7 is carboxamido, carboxyl, cyano or carbomethoxy.These copolymers reduce the water loss of cement slurries which are required for deep holes.Type: GrantFiled: April 3, 1985Date of Patent: May 6, 1986Assignee: Hoechst AktiengesellschaftInventors: Martin Hille, Wolfgang Friede, Heinz Wittkus, Friedrich Engelhardt, Ulrich Riegel
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Patent number: 4587279Abstract: A cementitious composition comprising a cementitious material and polyethylene glycol or end-capped polyethylene glycol as a phase change material, said polyethylene glycol and said end-capped polyethylene glycol having a molecular weight greater than about 400 and a heat of fusion greater than about 30 cal/g; the compositions are useful in making pre-formed building materials such as concrete blocks, brick, dry wall and the like or in making poured structures such as walls or floor pads; the glycols can be encapsulated to reduce their tendency to retard set.Type: GrantFiled: August 31, 1984Date of Patent: May 6, 1986Assignee: University of DaytonInventors: Ival O. Salyer, Charles W. Griffen
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Patent number: 4586960Abstract: This invention provides a cement admixture comprising a copolymer of an olefin having 2 to 8 carbon atoms with an ethylenically unsaturated dicarboxylic acid anhydride and a cement admixture comprising the copolymer and a water-reducing agent.The cement admixture of this invention can prevent the lowering of the fluidity, or slump loss of a hydraulic cement mix such as concrete, mortar, or paste with the lapse of time and provide improved applicability and workability.Type: GrantFiled: June 26, 1984Date of Patent: May 6, 1986Assignee: Kao CorporationInventors: Masanori Iizuka, Hideki Tanaka
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Patent number: 4544683Abstract: A process for producing an inorganic-organic composition material based on gypsum and polyurethane comprising exposing calcined gypsum or anhydrite to the action of water in the presence of a polyurethane or polyurethane-urea which is dispersible in water and in the presence of up to about 20% by weight (relative to the total mixture) of an alcohol and up to about 20% by weight (relative to the total mixture) of another organic solvent, and allowing the composition to set while permitting any solvents which may be present to evaporate. The calcium sulphate may be on a textile support or the composition may be molded into flexible shaped articles of good mechanical properties.Type: GrantFiled: May 18, 1984Date of Patent: October 1, 1985Assignee: Bayer AktiengesellschaftInventors: Peter Muller, Kuno Wagner, Christian Wegner, Peter Schwabe
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Patent number: 4525500Abstract: The invention provides articles made of polymer-modified cement mortars and concretes and processes for the production thereof. The processes comprise curing compositions which contain hydraulic cement and aqueous dispersions of polymers or copolymers of methacrylic or acrylic acid esters by means of a two stage curing process the first stage of which is carried out at an elevated temperature under conditions of high humidity and the second stage of which is carried out under drying conditions, preferably at elevated temperatures. The cement mortar and concrete articles according to the invention have relatively high Modulus of Rupture (MOR) values and preferably are roof tiles or shingles or other articles of relatively thin cross-section.Type: GrantFiled: July 6, 1982Date of Patent: June 25, 1985Assignee: Marley Tile A.G.Inventor: Michael E. Lynn
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Patent number: 4521361Abstract: Aqueous plastic molding compositions based on ceramic raw materials characterized by containing a dual binder system consisting of water-soluble and/or water-dispersed air-drying high molecular weight film-forming agents, as well as of water-insoluble thermoplasts of fine particle form sinterable at temperatures below 250.degree. C. and a method of producing molded articles using the said compositions are disclosed.Type: GrantFiled: August 1, 1983Date of Patent: June 4, 1985Assignee: T+F Kunststuffe fur Tecknik und Freizeit GmbHInventor: Werner Sommer
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Patent number: 4518725Abstract: Fluidizing agents for hydraulic bonding materials such as, for example, concrete, cements, anhydrites, plasters, limes, or others. The fluidizing agents comprise the water soluble condensation reaction products of aminosulfonic acids, having one or more aromatic nuclei, or a mixture thereof; polyamino products including polyamino acids, polyamides, or polythioamides, or their mono- or polymethylol derivatives, and polyamino derivatives of triazine; and formaldehyde or compounds which generate formaldehyde under reaction conditions. The water soluble fluidizing agents permit a reduction of the quantity of water required for mixing the bonding materials and provide an increased mechanical resistance thereto. The invention includes the bonding materials containing the fluidizing agent, the method of using the fluidizing agents in bonding materials, and method of forming the bonding materials.Type: GrantFiled: July 27, 1983Date of Patent: May 21, 1985Assignee: Chryso S.A.Inventor: Jean P. Guicquero
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Patent number: 4504318Abstract: A light-weight high-strength plastic concrete is produced by forming a water-in-oil type inverted emulsion from a cement slurry, vinyl monomers, and a polyalkylene glycol derivative having terminal carboxyl groups, said polyalkylene glycol being an addition product of a polyalkylene glycol shown by the following general formula and a dibasic acid anhydride ##STR1## wherein R represents an alkyl group having one or more alkyl group and polymerizing and hardening the inverted emulsion and drying it.Type: GrantFiled: October 31, 1983Date of Patent: March 12, 1985Assignee: Okura Kogyo Kabushiki KaishaInventors: Hideaki Matsuda, Takasi Saheki
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Patent number: 4474907Abstract: Polyvinyl alcohol synthetic fibers are used as reinforcing materials for hydraulically setting materials, and by selecting the aspect ratio of the polyvinyl alcohol fiber and the dispersing agent for said fiber, adequate dispersion is made possible even with the fiber of 2 denier or less, thereby a higher reinforcing effect may be achieved.The polyvinyl alcohol fiber is obtained by depositing 0.1-3.0% by weight based on the fiber of an oxidized polyethylene having an acid value of 5-150, and has a single yarn fineness of 0.5-2 denier, a length of 3-8 mm and an aspect ratio of 200-800, and the hydraulically setting material contains 0.1-4% by weight of said fiber.Type: GrantFiled: June 23, 1983Date of Patent: October 2, 1984Assignee: Kuraray Co., Ltd.Inventors: Tsuneo Genba, Akio Mizobe, Masaki Okazaki
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Patent number: 4461856Abstract: An aqueous hydraulic cement slurry is disclosed which comprises water, a hydraulic cement, a surfactant and, as a fluid loss additive, epihalohydrin derivatives of polyalkylenepolyamines.Type: GrantFiled: November 3, 1983Date of Patent: July 24, 1984Assignee: The Dow Chemical CompanyInventors: Stephen B. Willis, Pamela J. Boyce
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Patent number: 4444925Abstract: A sub-flooring mix comprising a composition of calcium sulfate hemihydrate and other additives; and sand and water. Polyvinyl alcohol is added to the composition, which prevents surface dusting when the mix sets.Type: GrantFiled: December 16, 1982Date of Patent: April 24, 1984Assignee: Gyp-Crete CorporationInventor: Joseph G. Feldman
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Patent number: 4424290Abstract: An additive for swelling clay grouts and cement-swelling clay grouts, intended to reduce the filtrate, lower and stabilize viscosity, retard rigidification time, limit sweating and sedimentation of the solid constituents, is an alkaline ethylenic acid polymer and/or copolymer, with molecular weight between 500 and 20,000, but preferably between 1000 and 6000.This additive is especially advantageous in the fields of civil engineering, building, public works and drilling.Type: GrantFiled: August 13, 1981Date of Patent: January 3, 1984Assignee: Societe CoatexInventors: Jacky Rousset, Roger P. Chavrier
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Patent number: 4379870Abstract: Reinforcing material for hydraulic substances such as cement, mortar, concrete or the like and a method for producing it. The reinforcing material consists essentially of an elongated product of a synthetic resin having protrusions on its surface and which was obtained by extruding and subsequent stretching. The method comprises mixing a polyethylene having a melt index of not more than 0.01 at 190.degree. C. under the load of 2.16 Kg with a polyethylene having a melt index of more than 0.01 thereby to obtain a polyethylene mixture having a melt index of 0.01 to 10, melt-extruding the polyethylene mixture under such conditions as to give an extruded product having a jagged surface and stretching the extruded product, whereby the reinforcing material having protrusions on its surface is obtained. Hydraulic substances with the reinforcing material incorporated therein is useful for production of concrete panel, concrete pipe, concrete channel, tetrapod, sleeper, tunnel, etc.Type: GrantFiled: June 30, 1981Date of Patent: April 12, 1983Assignee: Mitsui Petrochemical Industries, Ltd.Inventor: Hisashi Matsumoto
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Patent number: 4367300Abstract: Rust preventing synthetic resin compositions to be added to cement or mortar, which have high strength, adhesion and waterproof, contain 0.05.about.5 parts by weight of a primary alkanol-amine having 2 to 8 carbon atoms based on 100 parts by weight of resin solid content in a synthetic resin emulsion.Type: GrantFiled: December 3, 1980Date of Patent: January 4, 1983Assignee: Kowa Chemical Industries Co., Ltd.Inventors: Akiji Aoki, Terusato Inoue
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Patent number: 4331579Abstract: A solvent-based, plasticized vinyl resin adhesive containing Portland cement that adheres impervious and felt backed vinyl sheet material to damp concrete.Type: GrantFiled: February 9, 1981Date of Patent: May 25, 1982Assignee: Congoleum CorporationInventor: Laurence F. Haemer