Mixed With -n=c=x-containing Reactant Or Polymer Derived Therefrom (x Is A Chalcogen) Patents (Class 525/399)
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Patent number: 5378748Abstract: Polyacetal resin compositions capable of providing a molded article having exceptionally reduced surface gloss characteristics but which maintain the inherent mechanical properties and moldability of polyacetal resin include (A) 100 parts by weight of a polyacetal base resin and, incorporated therein, (B) between 1 to 50 parts by weight of a polyalkylene terephthalate copolymer having a melt flow temperature of 210.degree. C. or below, and (C) between 0.1 to 10 parts by weight of an isocyanate or isothiocyanate compound, or a derivative thereof.Type: GrantFiled: December 16, 1992Date of Patent: January 3, 1995Assignee: Polyplastics Co., Ltd.Inventors: Tohru Katsumata, Nobuyuki Matsunaga
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Patent number: 5374485Abstract: A polyacetal resin composition which comprises a polyacetal resin (as component A) and one or more members selected from the group consisting of an isocyanate compound, isothiocyanate compound, and modified product thereof (as component B) in an amount of 0.1-15 wt % of the composition, said polyacetal resin composition exhibiting good adhesion properties when bonded with a curable reactive resin adhesive. The present invention also relates to a part comprising a combination of the mold consisting of the composition and the adhesive.Type: GrantFiled: June 15, 1993Date of Patent: December 20, 1994Assignee: Polyplastics Co., Ltd.Inventors: Sei Wakatsuka, Jun Fukasawa
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Patent number: 5354798Abstract: An engineering polyacetal resin composition comprising 0.05-20 parts by weight of a dispersant (B) and 5-40 parts by weight of a filler (C), and 100 parts by weight of a resin ingredient (A) which comprises 90-50% by weight of a polyacetal resin (a) and 10-50% by weight of a polyamide resin (b) having a melting point of up to 230.degree. C., a maximum particle diameter of 0.03-10 .mu.m and a maximum aspect ratio of up to 2, and is dispersed in a matrix of said polyacetal resin (a).Type: GrantFiled: August 16, 1991Date of Patent: October 11, 1994Assignee: Asahi Kasei Kogyo Kabushiki KaishaInventors: Hiroshi Tsukahara, Masahiko Niino
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Patent number: 5344882Abstract: Incorporation of a thermoplastic polyurethane and at least one thermoplastic crystalline polymer selected from nylon 6, nylon 612, polypropylene, and polyalkylene terephthalates containing at least one ethylene copolymer into polyacetal polymer results in blends characterized as having improved toughness, or impact strength, and improved elongation over that of a comparable blend of polyacetal and at least one of said crystalline polymers alone.Type: GrantFiled: January 27, 1993Date of Patent: September 6, 1994Assignee: E. I. Du Pont de Nemours and CompanyInventor: Edmund A. Flexman
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Patent number: 5344875Abstract: The present invention provides a polyoxymethylene resin composition which is excellent in wear resistance and is suitable as materials for various sliding parts. The composition comprises (A) 65-98.8% by weight of a polyoxymethylene resin, (B) 0.2-5.0% by weight of a polyfunctional isocyanate compound, (C) 0.5-20% by weight of an olefin polymer containing 30% by weight or more of ethylene and a functional group containing an active hydrogen, and (D) 0.2-10% by weight of polyethylene.Type: GrantFiled: March 1, 1993Date of Patent: September 6, 1994Assignee: Asahi Kasei Kogyo Kabushiki KaishaInventor: Masahiko Niino
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Patent number: 5326846Abstract: A process for producing an impact-resistant polyacetal resin composition, which comprises mixing with shear a polyacetal resin (A), a thermoplastic polyurethane (B), a polyhydric alcohol (C) having at least three hydroxyl groups in the molecule and at least one compound (D) selected from the group consisting of a polyisocyanate (d.sub.1) and a compound (d.sub.2) which generates a polyisocyanate under heat, while at least two components (A) and (B) are melted. An injection-molded article from the impact-resistant polyacetal resin composition, provided by the above process, exhibits superior tensile strength and elongation at break at weld portions.Type: GrantFiled: April 1, 1993Date of Patent: July 5, 1994Assignee: Mitsubishi Gas Chemical Company, Inc.Inventors: Satoshi Nagai, Masao Hasegawa, Hiroshi Mimura, Makoto Kobayashi
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Patent number: 5318813Abstract: This invention relates to blends containing (a) 40-98 weight percent polyoxymethylene, (b) 1-40 weight percent thermoplastic polyurethane, and (c) 1-59 weight percent of at least one amorphous thermoplastic polymer, said blends being characterized as having better mold shrinkage than polyoxymethylene/thermoplastic polyurethane compositions and also having a useful balance of physical properties, such as stiffness, elongation, and toughness.Type: GrantFiled: November 25, 1991Date of Patent: June 7, 1994Assignee: E. I. du Pont de Nemours and CompanyInventor: Edmund A. Flexman, Jr.
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Patent number: 5310822Abstract: Thermoplastic molding materials containA) from 10 to 97% by weight of a polyoxymethylene homo- or copolymer,B) from 3 to 50% by weight of a thermoplastic elastomer selected from the group consisting of the thermoplastic polyurethanes, the polyetheresters and the polyetheramides, the flexible phase of which is derived from polyetherpolycarbonatediols,C) from 0 to 50% by weight of a fibrous or particulate filler or a mixture thereof andD) from 0 to 30% by weight of conventional additives or processing assistants.Type: GrantFiled: September 27, 1993Date of Patent: May 10, 1994Assignee: BASF AktiengesellschaftInventors: Sabine Kielhorn-Bayer, Peter Groll
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Patent number: 5294670Abstract: The present invention relates to a polyacetal copolymer comprising a polyoxymethylene group (A) and a vinyl polymer group (B), the copolymer having a structure of the formula (I):A.sub.n --X--B (I)wherein X is a terminal group of B and represents a binding group derived from a compound having at least two carbon atoms and 1 to 4 groups selected from hydroxyl, carboxyl, ester, amino and alkoxy groups, and A.sub.n means that A is present in the quantity of n times in number, and bonds to X, in which n=1 to 4, and the copolymers has a number average molecular weight of 10,000 to 500,000; a process for the production of said copolymer; and a composition comprising said copolymer and a polyvinyl polymer and/or polyoxymethylene.Type: GrantFiled: February 7, 1991Date of Patent: March 15, 1994Assignee: Asahi Kasei Kogyo Kabushiki KaishaInventors: Tadashige Hata, Kazuhiko Matsuzaki
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Patent number: 5292824Abstract: There is disclosed a process for producing a polyacetal resin composition, which comprises mixing (A) a polyacetal resin, (B) a thermoplastic polyurethane elastomer and (B) a polyhydric alcohol having at least three hydroxyl groups in the molecule, in molten state with shear, at a temperature of 180.degree. to 250.degree. C. The polyacetal resin composition produced by the above process gives injection-molded shaped articles showing various well-balanced physical properties such as tensile strength and elongation at break at weld portions, and impact resistance.Type: GrantFiled: March 10, 1993Date of Patent: March 8, 1994Assignee: Mitsubishi Gas Chemical Company, Inc.Inventors: Satoshi Nagai, Masao Hasegawa, Hiroshi Mimura, Makoto Kobayashi
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Patent number: 5286807Abstract: Polyoxymethylene compositions having 5-15 wt. thermoplastic polyurethane; where the polyurethane has a soft segment glass transition of lower than 0.degree. C., the polyoxymethylene has a molecular weight of 20,000-100,000, and the polyurethane is dispersed in the polyoxymethylene as discrete particles show extraordinary impact resistance as measured by Gardner impact.Type: GrantFiled: July 10, 1990Date of Patent: February 15, 1994Assignee: E. I. Du Pont de Nemours and CompanyInventor: Edmund A. Flexman, Jr.
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Patent number: 5266633Abstract: The invention relates to a mixture composed essentially of polyoxymethylene (component A), a rubber-elastic graft copolymer in which the particles have been formed from a rubber-elastic, single-phase core based on polydiene and a hard graft shell (component B) and, if appropriate, a polymeric third component (component C). The invention also relates to a three-component mixture of the components A, B' and C, the core, in the case of B', being preponderantly or entirely composed of poly(meth)acrylic acid ester or silicone rubber instead of polydiene.The shaped articles produced from these mixtures are particularly distinguished by good low-temperature impact strength.Type: GrantFiled: June 17, 1991Date of Patent: November 30, 1993Assignee: Hoechst AktiengesellschaftInventors: Karlheinz Burg, Harald Cherdron, Friedrich Kloos, Helmut Schlaf
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Patent number: 5250606Abstract: The present invention pertains to thermoplastic polymer blends which comprise a monovinylidene aromatic copolymer, an acetal polymer and a thermoplastic polycarbonate resin or a polyester resin derived from the reaction of a dicarboxylic acid and a glycol, and which may also optionally contain an elastomeric material such as a thermoplastic polyurethane or an elastomeric copolyester. The resulting polymer blends have good processability and a beneficial combination of physical and chemical properties including thermal/dimensional stability, impact resistance, chemical resistance and environmental stress crack resistance. Said polymer blends are suitable for use in the preparation of a variety of molded utilitarian articles having good appearance and paintability.Type: GrantFiled: April 7, 1992Date of Patent: October 5, 1993Assignee: The Dow Chemical CompanyInventors: Martin J. Guest, P. F. M. v/d Berghen, Ludo M. Aerts, Antonios Gkogkidis, Abraham F. de Bert
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Patent number: 5244946Abstract: Thermoplastic polymer blends comprising a monovinylidene aromatic copolymer, an acetal polymer and an elastomeric material such as a thermoplastic polyurethane or an elastomeric copolyester have good processability and a beneficial combination of physical and chemical properties including thermal/dimensional stability, impact resistance, chemical resistance and creep resistance. Said polymer blends are suitable for use in the preparation of a variety of molded utilitarian articles having good appearance and paintability.Type: GrantFiled: April 8, 1992Date of Patent: September 14, 1993Assignee: The Dow Chemical CompanyInventors: Martin J. Guest, P. F. M. v/d Berghen, Ludo M. Aerts, Antonios Gkogkidis, Abraham F. de Bert
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Patent number: 5225471Abstract: Melt blended filled thermoplastic resin compositions include a thermoplastic matrix resin, a filler material and a thermoplastic additive resin. The compositions of the invention include discreet continuous phases of matrix resin and additive resin, with the filler material being present essentially entirely within the additive resin phase (i.e., essentially absent from the matrix resin phase). More specifically, the components are selected so that their respective surface tensions allow the additive resin to form a complex three-dimensional interpenetrating network structure within the matrix resin when melt-blended, and such that essentially all of the filler material is homogeneously dispersed throughout the formed three-dimensional network structure.Type: GrantFiled: December 26, 1991Date of Patent: July 6, 1993Assignee: Polyplastics, Co., Ltd.Inventors: Yoshihisa Tajima, Mitsuru Yokouchi
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Patent number: 5219979Abstract: New polyoxazolidines can be defined with the general formula: ##STR1## where R, R.sub.1, R.sub.2 and n have the meaning specified in the description. These polyoxazolidines are useful cross-linking agents for hydrocuring systems based on polyisocyanates, acrylate polymers and polyepoxides, in compositions for paints, coatings, sealants and adhesives.Type: GrantFiled: February 10, 1992Date of Patent: June 15, 1993Assignee: Enichem Synthesis S.p.A.Inventor: Alberto Greco
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Patent number: 5183864Abstract: Disclosed is a process for the preparation of a thermoplastic polymer blend comprising a first preformed thermoplastic polymer such as a polyester, polycarbonate, ABS graft polymer and the like and a second thermoplastic polyamide or polyamideimide. The second polymer is prepared from a diisocyanate and polycarboxylic compund selected from a dicarboxylic acid, tricarboxylic acid or anhydride thereof, or mixtures of these components by reactively processing the monomer components in the presence of the first polymer.Type: GrantFiled: July 27, 1990Date of Patent: February 2, 1993Assignee: The Dow Chemical CompanyInventors: Robert G. Nelb, II, Kemal Onder
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Patent number: 5183860Abstract: Moldable polyacetal resin compositions include a polyacetal base resin and an impact resistant effective amount of a thermoplastic polyurethane resin melt-blended therewith. The polyacetal base resin is itself a mixture of (A.sub.1) a low hydroxyl-containing (LHC) polyacetal resin having less than 50 mmol/kg hydroxyl groups in its molecule, and (A.sub.2) a high hydroxyl-containing (HHC) polyacetal resin having greater than 50 mmol/kg hydroxyl groups in its molecule. The polyacetal resin compositions optionally may include a reactive compound having at least one reactive moiety to further enhance the desirable properties that are achieved by inclusion of the HHC polyacetal resin. The components are melt-blended and subjected to conditions (which typically occur during the melt-blending step) to allow the polyurethane resin to react with the HHC polyacetal resin.Type: GrantFiled: March 25, 1991Date of Patent: February 2, 1993Assignee: Polyplastics Co., Ltd.Inventor: Osamu Kashihara
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Patent number: 5043400Abstract: A method for producing articles of composite resin, wherein a liquid crystal polymer material in powder form is mixed with a second, melt-processable polymer material; the resulting mixture is kneaded at a temperature at which the second polymer material will melt but at which no deformation of the liquid crystal polymer will be caused so as to prepare a blend comprising the liquid crystal polymer powder uniformly dispersed in the matrix of the second polymer; and the blend is then subjected to a molding or shaping process at a temperature within the range at which the liquid crystal polymer is capable of forming liquid crystals.Type: GrantFiled: January 23, 1991Date of Patent: August 27, 1991Assignee: Tosoh CorporationInventors: Akeharu Tsuruta, Hisato Kawaguchi, Tomohiro Ishikawa, Yozo Kondo
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Patent number: 5043398Abstract: Novel oxymethylene graft polymers are obtained by grafting a functional compound (i.e., a polymer or compound having one or two hydroxyl, carboxyl, or amine functional groups) onto an oxymethylene backbone having pendant hydroxyl groups which serve as reactive sites for the graft reaction with diisocyanate coupling agents.Type: GrantFiled: May 12, 1989Date of Patent: August 27, 1991Assignee: Hoechst Celanese CorporationInventors: Andrew B. Auerbach, Jerry A. Broussard, Nan L. Yang, James L. Paul
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Patent number: 5004784Abstract: A composition of improved strength, stiffness, or toughness consisting essentially of a blend of at least two incompatible thermoplastic polymers, at least one of which has a flexural modulus of less than 150 kpsi, and at least one isocyanate reacting agent having functionality less than three. The composition, an engineering plastic that is impact resistant, is useful as, for example, a molding resin, an automobile bumper or door, or high pressure tubing.Type: GrantFiled: April 5, 1988Date of Patent: April 2, 1991Assignee: E. I. du Pont de Nemours and CompanyInventor: Gia Huynh-Ba
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Patent number: 4978725Abstract: The invention relates to mixtures composed essentially of polyoxymethylene and of 5 to 60% by weight of a polyurethane, the polyurethane being built up exclusively from aliphatic components and having an elongation at break of 800-1,500% and a Shore hardness A not exceeding 81.The shaped articles produced from the mixture according to the invention are distinguished, above all, by an improved notched impact strength and by matt surfaces.Type: GrantFiled: September 26, 1985Date of Patent: December 18, 1990Assignee: Hoechst AktiengesellschaftInventors: Eckart Reske, Ernst Wolters
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Patent number: 4968756Abstract: An improved resinous blend having good impact properties and solvent resistance comprising an aromatic carbonate polymer, a polyacetal and a thermoplastic polyurethane.Type: GrantFiled: September 5, 1989Date of Patent: November 6, 1990Assignee: The Dow Chemical CompanyInventors: H. Craig Silvis, Bruce A. King, Vinod K. Berry, John R. Schroeder
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Patent number: 4968773Abstract: Urea-formaldehyde resins which may be cured to give products having a low total extractable formaldehyde content are prepared by the following process:(i) an aqueous solution containing more than 50% formaldehyde and urea are mixed in a formaldehyde:urea molar ratio of 2-3:1 at pH 6-11,(ii) this mixture is heated to at least 80.degree. C.,(iii) a mineral or organic acid is added to bring the mixture to pH 0.5-3.5,(iv) the mixture is heated at a temperature between 80.degree. C. and the reflux temperature, preferably for 15 minutes to 1 hour,(v) keeping the temperature at or above 80.degree. C., a base is added to bring the mixture to pH 6.5-9 and(vi) urea is added to the mixture at a temperature up to 45.degree. C. until the formaldehyde:urea molar ratio is within the range 0.8-1.8:1.Type: GrantFiled: June 20, 1988Date of Patent: November 6, 1990Assignee: Dyno Industrier ASInventor: Ian R. Whiteside
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Patent number: 4946906Abstract: A process for producing a polyoxymethylene-polyurethane type alloy, which comprises allowing a polyisocyanate compound, a short chain polyol with a molecular weight of 62 to 350, a long chain polyol with a number-average molecular weight of 400 to 5,000, and optionally additives to react with each other in the presence of at least one or polyoxymethylene polymers.Type: GrantFiled: June 5, 1989Date of Patent: August 7, 1990Assignee: Nippon Polyurethane Industry Co., Ltd.Inventors: Noriyoshi Yano, Toshihiko Fujita
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Patent number: 4845161Abstract: Polyoxymethylene/thermoplastic polyurethane compositions having 5-40 weight percent polyurethane are modified by incorporating therein 0.05-1.0 weight percent of a polycarbodiimide (or a mixture of polycarbodiimides) having a molecular weight of about 1000 and containing units of the formula ##STR1## where n has an average value of about 3, to improve resistance to discoloration and decomposition.Type: GrantFiled: November 23, 1987Date of Patent: July 4, 1989Assignee: E. I. Du Pont de Nemours and CompanyInventor: Paul N. Richardson
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Patent number: 4804716Abstract: Polyoxymethylene compositions having 15-40 wt. % thermoplastic polyurethane, where the polyurethane has a glass transition of lower than -15.degree. C., the polyoxymethylene has a molecular weight of 20,000-100,000, and the polyurethane is dispersed in the polyoxymethylene as small particles show extraordinary toughness as measured by notched Izod.Type: GrantFiled: July 21, 1987Date of Patent: February 14, 1989Assignee: E. I. Du Pont de Nemours and CompanyInventor: Edmund A. Flexman, Jr.
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Patent number: 4707525Abstract: Articles molded from oxymethylene polymer molding compositions of the present invention exhibit enhanced impact strength properties, especially at low temperatures such as -20.degree. F. It has now been found that the impact strength of articles molded from oxymethylene polymer molding compositions may be improved when the compositions include an elastomeric polyurethane, which is the reaction product of:(i) 4,4'-methylenebis(phenyl isocyanate),(ii) polyoxytetramethylene glycol having a molecular weight within the range of about 1500 to about 3000, and(iii) at least one diol extender selected from the group consisting of aliphatic straight chain diols having from 2 to about 6 carbon atoms, bis(2-hydroxy-ethyl) ether of hydroquinone, and bis(2-hydroxy-ethyl) ether of resorcinol.Type: GrantFiled: November 14, 1986Date of Patent: November 17, 1987Assignee: Celanese CorporationInventors: H. Leslie LaNieve, III, Robert S. Drzal, Benjamin S. Ehrlich
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Patent number: 4689373Abstract: Mechanical properties, especially tensile and impact properties, of molding compositions comprising at least one thermoplastic oxymethylene polymer and optionally also containing an impact-enhancing amount of a polyurethane, can be improved by incorporating into the molding composition an effective amount greater than 10 weight percent of the composition of a monomeric formaldehyde/amino compound condensation product or prepolymeric amino resin selected from condensation products of formaldehyde and at least one of guanidine, urea, a substituted or unsubstituted guanamine and melamine, preferably having a degree of polymerization of about 2-5. An acid catalyst can be employed to promote the cross-linking reactions of the prepolymeric amino resin. In the compositions comprising polyurethane, amounts of the amino resin of less than 10 weight percent can be used.Type: GrantFiled: October 24, 1985Date of Patent: August 25, 1987Assignee: Celanese CorporationInventors: Andrew B. Auerbach, Derrick B. McKie
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Patent number: 4640949Abstract: Polyoxymethylene compositions are stabilized by a blend of thermoplastic polyurethane with polyamide where the polyamide is dispersed throughout the polyurethane as a separate phase having substantially all of the polyamide particles with a diameter of less then six microns and where the polyamide comprises 0.2 to 5 weight percent based on the quantity of polyoxymethylene.Type: GrantFiled: May 21, 1985Date of Patent: February 3, 1987Assignee: E. I. Du Pont de Nemours and CompanyInventor: Mark E. Wagman
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Patent number: 4582869Abstract: Polyoxymethylene/thermoplastic polyurethane compositions having 5-40 weight percent polyurethane are modified by incorporating therein 0.2-1.0 weight percent ethylene bis-stearamide to improve mold release and mold deposit.Type: GrantFiled: February 21, 1984Date of Patent: April 15, 1986Assignee: E. I. Du Pont de Nemours and CompanyInventor: Marion G. Waggoner
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Patent number: 4547548Abstract: Polycondensation compounds containing piperidine and triazine groups, having a mean molecular weight from 1000 to 20,000 and constituted by structural units a and b of the formula ##STR1## are suitable as anti-actinic stabilizers for incorporation in polymeric materials.Type: GrantFiled: July 19, 1984Date of Patent: October 15, 1985Assignee: Ciba-Geigy S.p.A.Inventor: Giuseppe Cantatore
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Patent number: 4539372Abstract: Cationic resins suitable as binders for stoving coating compositions, particularly for application by electro-deposition, and as mill base resins for grinding pigments and extenders; and a process for producing same is described. The resins are produced through reaction of a resinous compound carrying hydroxyl groups with a monoisocyanate which is totally or partially the reaction product of a diisocyanate and a tertiary amine which carries the ring structure ##STR1## wherein R and R.sub.x are a hydrogen atom or an alkyl radical or an aryl radical which may be substituted and wherein n is 2 or 3, the quantity of basic component being chosen in order that the cationic resin has an amine value of at least 35, and preferably of from 40 to 140 mg KOH/g.Type: GrantFiled: December 20, 1983Date of Patent: September 3, 1985Assignee: Vianova Kunstharz, A.G.Inventor: Willibald Paar
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Patent number: 4535127Abstract: A polyacetal copolymer composed of an acetal polymer portion and a thermoplastic elastomer portion having soft segments and hard segments, the second-order transition temperature of said elastomer portion being in the range of -120.degree. to 40.degree. C. A process for producing such a polyacetal copolymer is also described.Type: GrantFiled: March 13, 1984Date of Patent: August 13, 1985Assignee: Asahi Kasei Kogyo Kabushiki KaishaInventors: Kazuhiko Matsuzaki, Minoru Hamada
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Patent number: 4507444Abstract: A process of making radically polymerizable compositions suitable for the production of impact resistant optically clear glass like plastic and forming the glass from such compositions is disclosed. Also taught are the polymerizable compositions and the final glass produced. An isocyanate terminated prepolymer based upon a polyol selected from polyesters, polyester amides, polycarbonates and polyacetals and diisocyanates selected from branched aliphatic isocyanates, cycloaliphatic isocyanates and aliphatic or cycloaliphatic isocyanates graft polymerized with vinyl monomers is chain extended with aliphatic or cyloaliphatic diamines while in solution in vinyl monomers consisting mainly of methacrylic acid esters. The chain extension is carried out with a deficit of amine and preferably to a viscosity at 20% solids in the vinyl monomers of between 200 and 30,000 cP at 20.degree. C. The composition is then radically polymerized to form the high impact glass like plastic alloy.Type: GrantFiled: August 21, 1981Date of Patent: March 26, 1985Assignee: Bayer AktiengesellschaftInventors: Wilhelm Slawyk, Gerhard Balle, Manfred Munzer, Adolf Wohnhas, deceased
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Patent number: 4480071Abstract: An improved molding composition is provided comprised of an oxymethylene polymer, a blocked or unblocked isocyanate compound in an amount ranging from about 0.2 to 2.0 percent by weight based on the weight of the polymer, a filler and an isocyanate-active catalyst. Shaped articles can be produced from the composition which exhibit desirable mechanical properties without the need for fibrous reinforcing agents.Type: GrantFiled: September 19, 1983Date of Patent: October 30, 1984Assignee: Celanese CorporationInventors: Kavilipalayam Natarajan, Daniel Zimmerman
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Patent number: 4469842Abstract: An improved oxymethylene polymer composition is provided which is comprised of a blocked or unblocked isocyanate, a synergistic blend of isocyanate catalysts consisting of dibutyl tin dilaurate and at least one alkyl dimethyl benzyl ammonium saccharinate (as defined) and a reinforcing agent. The presence of the blend of isocyanate catalysts enables satisfactory coupling to be achieved between the reinforcing agent and the oxymethylene polymer with a smaller amount of isocyanate coupling agent than would normally be required. In addition, a lessened amount of catalyst is required to achieve such a result.Type: GrantFiled: August 1, 1983Date of Patent: September 4, 1984Assignee: Celanese CorporationInventor: Gina R. Kritchevsky
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Patent number: 4451620Abstract: Diethanolammonium sulphamate is a curing agent for modified aminoplast resins.Type: GrantFiled: May 5, 1983Date of Patent: May 29, 1984Assignee: Cassella AktiengesellschaftInventors: Steffen Piesch, Peter Dorries
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Patent number: 4410685Abstract: A process for preparing a urea-formaldehyde base resin having a F/U molar ratio of 1.0:1-1.2:1, that is hydrolytically stable, which comprises adjusting a formaldehyde solution to a pH of 0.5-2.5, slowly charging urea to said formaldehyde solution while maintaining the temperature at 40.degree.-70.degree. C., neutralizing the reaction mixture after obtaining a Gardner viscosity in the range of T+-V+, then adding the final charge of urea and permitting equilibration.Type: GrantFiled: September 10, 1982Date of Patent: October 18, 1983Assignee: Borden, Inc.Inventor: James H. Williams
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Patent number: 4409293Abstract: A process for bonding lignocellulosic material under heat and pressure, where the bonded lignocellulosic material is characterized by a low emission of formaldehyde, which comprises applying a binder to said lignocellulosic material, said binder comprising a urea-formaldehyde base resin having a ratio of formaldehyde to urea of 1.0:1-1.2:1, said base resin having essentially no free formaldehyde and said base resin when cured containing substantially more methylene groups than methylene ether groups, consolidating said lignocellulosic material and curing the binder.Type: GrantFiled: September 10, 1982Date of Patent: October 11, 1983Assignee: Borden, Inc.Inventor: James H. Williams
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Patent number: 4360638Abstract: This invention is directed to compositions useful as ionomeric hot melt pressure sensitive adhesive compositions. These compositions comprise a polymer containing carboxylic acid, a miscible metal salt, and an o-methoxy-substituted aryl acid. These compositions display low melt viscosity, simplifyingapplication, as well as improved adhesive properties, especially shear resistance.Type: GrantFiled: January 13, 1982Date of Patent: November 23, 1982Assignee: Rohm and Haas CompanyInventor: Benjamin Bartman
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Patent number: 4347338Abstract: A thermosettable polyurethane product is prepared by blending a compound having two or more terminal isocyanate groups to a thermoplastic resin which is inert to said isocyanate group to prepare an isocyanate compound batch, and further blending the isocyanate compound batch to a thermoplastic polyurethane resin and fabricating the resulting mixture.Type: GrantFiled: May 19, 1981Date of Patent: August 31, 1982Assignees: Dainichiseika Color & Chemicals Mfg. Co., Ltd., Ukima Colour & Chemicals Mfg. Co., Ltd.Inventors: Hideyasu Torii, Susumu Nakamura
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Patent number: 4277577Abstract: The invention provides a molding composition of a mixture of an oxymethylene polymer, an elastomer having a softening temperature of below the crystallite melting point of the oxymethylene polymer and a second order transition temperature of from -120.degree. to +30.degree. C., and a segmented thermoplastic copolyester.The molding composition of the invention is distinguished by improved mechanical properties, especially with respect to the impact strength.Type: GrantFiled: April 23, 1979Date of Patent: July 7, 1981Assignee: Hoechst AktiengesellschaftInventors: Karlheinz Burg, Werner Schmieder, Ernst Wolters