Non- >n-c(=x)-n< Nitrogen Reactant Is An Organic Compound Containing Two Or More Amino Groups Patents (Class 528/263)
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Patent number: 10731034Abstract: A polyurethane urea composition and a preparation method thereof are provided. The method includes mixing and reacting an urea and an amine compound to obtain a polyurea oligomer, and mixing and reacting the polyurea oligomer and a cyclic carbonate compound to obtain a polyurethane urea composition having a repeating unit represented by formula I: —R2—U2—U1—U2—R2—, wherein ??[formula I] U1 is a is an integer of 1 to 10000, each U2 is independently each R1 is independently a C1 to C20 alkylene group, a C3 to C20 cycloalkylene group, a C8 to C20 alkylarylene group, a polyether group having a weight-average molecular weight of 100 g/mol to 10000 g/mol, or a combination thereof, and each R2 is independently an aliphatic group, a cycloaliphatic group, an aromatic group substituted by an alkyl or an unsubstituted aromatic group, an oligo polyether group, an oligo polyester group, or a combination thereof.Type: GrantFiled: March 27, 2018Date of Patent: August 4, 2020Assignee: Industrial Technology Research InstituteInventors: Mao-Lin Hsueh, Yi-Zhen Chen, Hsiao-Chun Yeh, Yung-Chan Lin, Cheng-Han Hsieh
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Patent number: 9035014Abstract: The present invention relates to a new process for preparing condensation resins, constructed formally from urea, formaldehyde, and CH-acidic aldehydes.Type: GrantFiled: February 13, 2012Date of Patent: May 19, 2015Assignee: BASF SEInventors: Stefan Meuer, Klaus Menzel, Kai Stehmeier, Guenter Scherr
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Patent number: 8741430Abstract: Amino-formaldehyde resins may be prepared using formulations including formaldehyde, glycerin and at least one amino compound selected from the group consisting of urea, melamine, and mixtures thereof; under reaction conditions sufficient to prepare a resin, wherein; the amino-formaldehyde resin is prepared in a substantial absence of a sulfonating agent, ethylene glycol, and polyalkylene glycols. If the amino compound is urea, then the urea is present in a molar ratio of formaldehyde to urea ranging from 0.70 to 1.30; if the amino compound is melamine, then the melamine is present in a molar ratio of formaldehyde to melamine ranging from 1.3 to 2.2; and if the amino compound is a mixture of urea and melamine, then the mixture of urea and melamine is present in a molar ratio of formaldehyde to urea and melamine ranging from 0.35 to 1.3.Type: GrantFiled: June 25, 2008Date of Patent: June 3, 2014Assignee: Momentive Specialty Chemicals Inc.Inventors: Byung Young No, David M. Harmon, Todd R. Miller
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Publication number: 20040152855Abstract: A composition, comprising, in an appropriate medium, at least one polymer with a highly specific ordered structure is disclosed. These compositions find a specific application in the field of make-up and are capable of being applied to keratinous fibres, in particular to the nails, eyelashes, eyebrows and hair. In particular, these compositions can make it possible to obtain a film which exhibits good resistance to chipping, to impacts, to rubbing movements, to scratches and/or to pressing actions.Type: ApplicationFiled: January 17, 2003Publication date: August 5, 2004Applicant: L'OrealInventor: Nathalie Mougin
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Patent number: 6720392Abstract: An aqueous amino resin blend comprises aliphatic linear, branched or cyclic amines A containing at least one primary, secondary or tertiary amino group, at least one hydroxyl group and 2 to 20 carbon atoms, and amino resins B, and is used as an impregnating resin in the production of finished foils and edgings.Type: GrantFiled: May 6, 2002Date of Patent: April 13, 2004Assignee: Solutia Germany GmbH & Co. KGInventors: Frank Scholl, Johann Wonner, Wolfgang Scholz
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Publication number: 20030135004Abstract: A composition, comprising, in an appropriate medium, at least one polymer with a highly specific ordered structure is disclosed. These compositions find a specific application in the field of make-up and are capable of being applied to keratinous fibres, in particular to the nails, eyelashes, eyebrows and hair. In particular, these compositions can make it possible to obtain a film which exhibits good resistance to chipping, to impacts, to rubbing movements, to scratches and/or to pressing actions.Type: ApplicationFiled: January 17, 2003Publication date: July 17, 2003Applicant: L'OrealInventor: Nathalie Mougin
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Patent number: 6552146Abstract: A composition, comprising, in an appropriate medium, at least one polymer with a highly specific ordered structure is disclosed. These compositions find a specific application in the field of make-up and are capable of being applied to keratinous fibers, in particular to the nails, eyelashes, eyebrows and hair. In particular, these compositions can make it possible to obtain a film which exhibits good resistance to chipping, to impacts, to rubbing movements, to scratches and/or to pressing actions.Type: GrantFiled: April 5, 2000Date of Patent: April 22, 2003Assignee: L'Oreal S.A.Inventor: Nathalie Mougin
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Patent number: 6455631Abstract: The present invention relates to aqueous polyurethane dispersions wherein the polyurethanes contain terminal hydrazide groups and correspond to the formula wherein the terminal, modified hydrazide groups are present in an amount of 1 to 25% by weight [calculated as C(O)—NH—NH—C(O), MW 84], based on the weight of the polyurethanes, and wherein X represents OR′ or NHR′, R represents the residue obtained by removing the isocyanate groups from an NCO prepolymer, R′ represents a group which is inert to Isocyanate groups under the conditions used to form the polyurethane of in formula I, R″ represents a divalent, linear or branched aliphatic group containing 2 to 10 carbon atoms, provided that there are at least two carbons between the oxygen atoms, wherein the aliphatic group may optionally be substituted by heteroatoms to form ether or ester groups, m is 0 or 1 and n is 2 to 4.Type: GrantFiled: December 1, 2000Date of Patent: September 24, 2002Assignees: Bayer Corporation, Bayer AktiengesellschaftInventors: Harald Blum, Lyubov K. Gindin, Karen M. Henderson, Patricia B. Jacobs, Sze-Ming Lee, Brian Long, Robert A. Sylvester, Douglas A. Wicks
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Patent number: 6362359Abstract: The present invention relates to compounds containing modified hydrazide groups and corresponding to formula I wherein R represents the residue obtained by removing the isocyanate groups from a monomeric polyisocyanate, a polyisocyanate adduct or an NCO prepolymer, X represents OR′ or NHR′ and R′ represents a group which is inert to isocyanate groups under the conditions used to form the compound of formula I, R″ represents a divalent, linear or branched aliphatic group containing 2 to 10 carbon atoms, provided that there are at least two carbons between the oxygen atoms wherein the aliphatic group may optionally be substituted by heteroatoms to form ether or ester groups, and n is 2 to 6.Type: GrantFiled: December 1, 2000Date of Patent: March 26, 2002Assignee: Bayer CorporationInventors: Sze-Ming Lee, Karen M. Henderson, Patricia B. Jacobs, Robert A. Sylvester, Douglas A. Wicks
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Patent number: 6200683Abstract: The invention pertains to compositions which can be coated onto substrates. These compositions include a combination of a resin blend comprising a first polyester resin and a second polyester resin, wherein the first polyester is different from the second polyester, an aminoplast crosslinking resin, an acid catalyst, and a urea-aldehyde resin. Films prepared from coating compositions made in accordance with the present invention having improved stain resistance. In many instances, films prepared from coating compositions made in accordance with the present invention not only have improved stain resistance, but also have low temperature flexibility.Type: GrantFiled: December 16, 1994Date of Patent: March 13, 2001Assignee: PPG Industries Ohio, Inc.Inventors: Robert A. Montague, W. Scott Huffman, Jamel S. Richardson, Padmanabhan Sundararaman
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Patent number: 6150457Abstract: The present invention relates to compounds containing modified hydrazide groups and corresponding to formula I ##STR1## wherein R represents the residue obtained by removing the isocyanate groups from a monomeric polyisocyanate, a polyisocyanate adduct or an NCO prepolymer,X represents OR' or NHR' andR' represents a group which is inert to isocyanate groups under the conditions used to form the compound of formula I andn has a value of 2 to 6.The present invention also relates to one-component, thermoset coating compositions containing the compounds of formula I and a cross-linking component that is reactive with these compounds. Finally, the present invention relates coatings, sealants and adhesives prepared from these thermoset compositions.Type: GrantFiled: November 23, 1998Date of Patent: November 21, 2000Assignees: Bayer Corporation, Bayer AktiengesellscaftInventors: Sze-Ming Lee, Douglas A. Wicks, Eberhard Koenig, Carol L. Kinney, Karen M. Henderson
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Patent number: 5961965Abstract: A description is given of water-soluble or water-dispersible polyaspartic acid derivatives, their preparation and their use in cosmetology, especially in hair cosmetology.Type: GrantFiled: July 1, 1997Date of Patent: October 5, 1999Assignee: BASF AktiengesellschaftInventors: Son Nguyen Kim, Axel Sanner, Peter Hossel, Matthias Kroner
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Patent number: 5712363Abstract: The present invention relates to coating compositions including a particular class of oligomeric sterically hindered polyamines as replacements for traditional blocked and unblocked polyamine crosslinkers. The use of these oligomeric sterically hindered polyamine crosslinkers resultss in a desirable pot life/cure speed relationship not generally available with traditional unblocked polyamine crosslinkers, as well as a lower VOC and often better appearance characteristics than generally available with the traditional blocked varieties.Type: GrantFiled: August 28, 1995Date of Patent: January 27, 1998Assignee: Akzo Nobel NVInventors: Arie Noomen, Thomas Mezger, Klaus Hobel, Keimpe Jan van den Berg
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Patent number: 5182360Abstract: Tris(norbornenyl) isocyanurate compounds of the formula: ##STR1## wherein R.sup.1 is either H or methyl group, are prepared from the base-catalyzed trimerization of norbornenyl isocyanate. Tris(norbornenyl) isocyanurate is suitable for use as a crosslinker in thiol-ene formulations containing a difunctional thiol oligomer or in systems containing norbornene-difunctional oligomers and polyfunctional thiols, producing improved high temperature properties for the cured compositions.Type: GrantFiled: October 17, 1991Date of Patent: January 26, 1993Assignee: Loctite CorporationInventors: Anthony F. Jacobine, Steven T. Nakos
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Patent number: 5158611Abstract: A process for producing a resin is disclosed, comprising reacting (a) a polyalkylenepolyamine, (b) an alicyclic dibasic carboxylic acid and/or a reaction product having a free carboxyl group that is obtained by reacting an alicyclic dibasic carboxylic acid with a glycol, (c) a urea, and (d) an aldehyde and/or an alkylating agent. The resulting resin is useful as a wet strength agent to provide a paper coating composition having improved printability and printing effects.Type: GrantFiled: August 22, 1991Date of Patent: October 27, 1992Assignee: Sumitomo Chemical Co., Ltd.Inventors: Shigeru Ura, Haruo Tanaka, Hisao Takagishi, Yoshiya Fukuyama, deceased, Hiroko Fukuyama, heir, Takuya Fukuyama, heir, Yuko Fukuyama, heir
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Patent number: 5039754Abstract: A polymeric peroxide comprising a dilvalent recurring unit having the formula: ##STR1## wherein the recurring unit of Formula I has a 10 hour half-life temperature of at least 80.degree. C. and optionally a divalent recurring unit having the formula: ##STR2## wherein R.sup.1, R.sup.2, R.sup.3, R.sup.5, X, X.sup.1, Y, Z, y and z are as defined in the Detailed Description of the Preferred Embodiments and the polymeric peroxide has a molecular weight of 1,000 to 200,000. The polymeric peroxides are derived from hydroxy-hydroperoxides of dihydroxy dialkyl peroxides. These polymeric peroxides can be used for preparing block copolymers and compatibilizing polymer blends and alloys.Type: GrantFiled: August 30, 1990Date of Patent: August 13, 1991Assignee: Atochem North America, Inc.Inventor: Jose Sanchez
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Patent number: 5034501Abstract: A process for producing a resin is disclosed, comprising reacting (a) a polyalkylenepolyamine, (b) an alicyclic dibasic carboxylic acid and/or a reaction product having a free carboxyl group that is obtained by reacting an alicyclic dibasic carboxylic acid with a glycol, (c) a urea, and (d) an aldehyde and/or an alkylating agent. The resulting resin is useful as a wet strength agent to provide a paper coating composition having improved printability and printing effects.Type: GrantFiled: September 18, 1990Date of Patent: July 23, 1991Assignee: Sumitomo Chemical Co., Ltd.Inventors: Shigeru Ura, Haruo Tanaka, Hisao Takagishi, Yoshiya Fukuyama, deceased
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Patent number: 4981944Abstract: A liquid coating composition is provided which comprises, as a binder, an addition polymer containing on average 2 or more pendant activated unsaturated groups and, as a crosslinking agent, a compound containing on average 2 or more primary amino groups. The pendant activated unsaturated groups of the addition polymer are based upon fumaric, maleic and/or itaconic acid and/or anhydrides thereof. The liquid coating compositions of the present invention provide the particular advantage of rapid cure at ambient temperatures.Type: GrantFiled: June 14, 1989Date of Patent: January 1, 1991Assignee: Akzo N. V.Inventors: Tamme Bartels, Gerardus J. W. M. Maters
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Patent number: 4906726Abstract: A water-based coating composition comprising as the first component, a mixture of a polyaldehyde chosen from the group consisting of glyoxal, glutaraldehyde and derivatives of glyoxal and glutaraldehyde, and a water dispersible component chosen from the group consisting of epoxy resin emulsions which can be emulsified in water, synthetic latexes stable at about pH 7 or less, low molecular weight resin emulsions, epoxy ester emulsions, water emulsified alkyds, and cationic, anionic and non-ionic asphalt emulsions and, as the second component, the non-gel reaction product of (I) urea-formaldehyde ether monomer, urea-formaldehyde phenol monomer, urea-nonylphenol formaldehyde monomer, thiourea-formaldehyde ether monomer, melamine formaldehyde ether monomer hexamethoxymethyl melamine, with (II) a polyamine chosen from a group consisting of primary and secondary amines and/or a monoamine, combined with (III) a hydroxide or oxide of calcium, strontium or barium.Type: GrantFiled: March 13, 1989Date of Patent: March 6, 1990Assignee: Adhesive Coatings Co.Inventor: Lowell Cummings
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Patent number: 4855394Abstract: Condensates based on substituted ureas, their reaction products with di- and/or polyisocyanates, derivatives of di- and/or polycarboxylic acids or p-substituted phenols and/or their methylol derivatives, their preparation and their use. These condensates each contain two or more cyclic urea units and can be prepared either by reacting primary di- or polyamines with ureas and reacting the product with predominantly CH-acidic aldehydes or by reacting primary amines with isocyanates and reacting the product with predominantly CH-acidic aldehydes in the presence of an acidic catalyst. The said condensates and their reaction products are useful for the preparation of heat-curable coating materials and of binders for cathodic electrocoating.Type: GrantFiled: January 25, 1989Date of Patent: August 8, 1989Assignee: BASF AktiengesellschaftInventors: Ulrich Goeckel, Harro Petersen, Rolf Osterloh, Eberhard Schupp, Werner Loch, Thomas Schwerzel
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Patent number: 4847315Abstract: A water-soluble, thermosetting resin comprising units derived from tris(2-aminoethyl)amine, and preferably units derived from dicyandiamide and/or epichlorohydrin, is useful as an accelerator in paper sizing, e.g. using an alkyl ketene dimer.Type: GrantFiled: June 3, 1987Date of Patent: July 11, 1989Assignee: W. R. Grace ABInventor: Thord G. G. Hassler
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Patent number: 4814422Abstract: In the proposed pulverulent aminoplast adhesive resin for wood-base materials having a low formaldehyde emission, the resin is a mixture of(a) from 40 to 90 parts by weight of a urea/formaldehyde resin having a molar ratio of urea to formaldehyde of from 1:1.4 to 1:2,(b) from 2 to 20 parts by weight of melamine, some or all of which may have been reacted with the urea/formaldehyde resin component,(c) from 2 to 20 parts by weight of urea and(d) if required, from 0.1 to 10 parts by weight of an agent for increasing the shelf life,together with not more than 10 parts by weight of water and, if required, not more than 10 parts by weight of other additives, the numbers of parts by weight of the components summing to 100.In the process for the preparation of the pulverulent aminoplast adhesive resin, powdered melamine is stirred into a solution of the urea/formaldehyde resin, urea is added and the solution is spray dried.Type: GrantFiled: June 19, 1987Date of Patent: March 21, 1989Assignee: BASF AktiengesellschaftInventors: Hans Diem, Friedrich Kraus, Guenther Matthias, Bruno Maurer, Otto Wittmann
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Patent number: 4659787Abstract: A new class of epoxy curing agents has been discovered that utilizes the monomer of (a) urea-formaldehyde, (b) phenol modified urea-formaldehyde, or (c) thiourea-formaldehyde as the center of a polyamine molecule. The ether monomers are reacted with conventional aliphatic, cycloaliphatic, and aromatic polyamines to split off alcohol and water-yielding urea-formaldehyde etc., polyamine epoxy curing agents.Type: GrantFiled: November 14, 1985Date of Patent: April 21, 1987Assignee: Chemcrete International PartnershipInventor: Lowell O. Cummings
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Patent number: 4574145Abstract: A new class of epoxy curing agents has been discovered that utilizes the monomer of (a) urea-formaldehyde, (b) phenol modified urea-formaldehyde, or (c) thiourea-formaldehyde as the center of a polyamine molecule. The ether monomers are reacted with conventional aliphatic, cycloaliphatic, and aromatic polyamines to split off alcohol and water-yielding urea-formaldehyde etc., polyamine epoxy curing agents.Type: GrantFiled: September 28, 1984Date of Patent: March 4, 1986Assignee: Chemcrete InternationalInventor: Lowell O. Cummings
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Patent number: 4511707Abstract: The wet fastness properties of direct or reactive dyeings on cellulosic substrates are improved by aftertreatment with a precondensate of(A) the product of reacting a mono- or polyfunctional primary or secondary amine with cyanamide, dicyandiamide (DCDA), guanidine or biguanidine; or ammonia with cyanamide or DCDA; whereby up to 50 mole % of the cyanamide, DCDA, guanidine or biguanide may be replaced with a dicarboxylic acid or a mono- or di-ester thereof, said product (A) containing reactive hydrogen atoms bound to nitrogen, and either(B) an epihalohydrin or a precursor thereof, or(C) formaldehyde or a formaldehyde precursor, or(D) a dihydroxyalkyleneurea or a methyl ether thereof,followed by formaldehyde or a formaldehyde precursor optionally together with(E) an N-methylol derivative of a urea, melamine, guanamine, triazinone, urone, carbamate or acid amideand, if (A) is used with (C) or (D), or if (E) is present, together with(F) a catalyst for the cross-linking of N-methylol compounds of the type (E) abovType: GrantFiled: January 25, 1984Date of Patent: April 16, 1985Assignee: Sandoz Ltd.Inventors: James R. Runyon, Salvatore Valenti
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Patent number: 4475918Abstract: Aftertreatment of dyeings on cotton or nylon with (A) a polybasic compound which is the product of reacting a primary or secondary amine with cyanamide, dicyandiamide, guanidine or biguanidine and, sequentially or simultaneously (B) a precondensate formed by reacting a compound of type (A) with an N-methylol derivative gives wet fastness properties superior to those given by either (A) or (B) used alone.Type: GrantFiled: August 24, 1983Date of Patent: October 9, 1984Assignee: Sandoz Ltd.Inventors: Bruno Kissling, Tibor Robinson
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Patent number: 4452606Abstract: The wet fastness properties of direct or reactive dyeings on cellulosic substrates are improved by aftertreatment with a precondensate or mixture of(A) the product of reacting a polyalkylenepolyamine in free base or salt form with an epihalohydrin or a precursor thereofand (B) and N-methylol derivative of a urea, melamine, guanamine, triazinone, urone, carbamate or acid amidein the presence of(C) a catalyst for the cross-linking of N-methylol compounds of the type (B) above,followed by a heat-curing step.Type: GrantFiled: May 10, 1982Date of Patent: June 5, 1984Assignee: Sandoz Ltd.Inventors: Joseph van Diest, Salvatore Valenti
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Patent number: 4443223Abstract: The fastness of direct dyes on cellulose substrates is improved by after-treatment with the reaction product of a quaternary polyalkylene polyamine with an N-methylol resin precursor, and heat curing in the presence of a catalyst. The unfixed portion of reactive dyes substantive to cellulose may also be given improved wet and light fastness by this treatment.Type: GrantFiled: August 30, 1982Date of Patent: April 17, 1984Assignee: Sandoz Ltd.Inventors: Bruno Kissling, Walter Knobel, Tibor Robinson
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Patent number: 4439208Abstract: The fastness properties of basic dyeings on cellulosic substrates are improved by treating the substrate with a fixing agent comprising a precondensate or mixture of(A) the reaction product of an amine with cyanamide, dicyandiamide, guanidine or biguanidine, or,(B) a quaternary polyalkylene polyamine with(C) formaldehyde and/or,(D) an N-methylol compound optionally together with(E) a catalyst, e.g. MgCl.sub.2.The fixing agents are normally applied as an aftertreatment, with a subsequent heat-curing step.Type: GrantFiled: June 22, 1982Date of Patent: March 27, 1984Assignee: Sandoz Ltd.Inventors: Helmut Moser, Tibor Robinson
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Patent number: 4439203Abstract: The wet fastness properties of direct or reactive dyeings on cellulosic substrates are improved by aftertreatment with a precondensate of(A) the product of reacting a mono- or polyfunctional primary or secondary amine with cyanamide, dicyandiamide (DCDA), guanidine or biguanidine; or ammonia with cyanamide or DCDA; whereby up to 50 mole % of the cyanamide, DCDA, guanidine or biguanidine may be replaced with a dicarboxylic acid or a mono- or di-ester thereof, said product (A) containing reactive hydrogen atoms bound to nitrogen,and either (B) an epihalohydrin or a precursor thereofor (C) formaldehyde or a formaldehyde precursoror (D) a dihydroxyalkyleneurea or a methyl ether thereof, followed by formaldehyde or a formaldehyde precursoroptionally together with (E) an N-methylol derivative of a urea, melamine, guanamine, triazinone, urone, carbamate or acid amideand, if (A) is used with (C) or (D), or if (E) is present, together with (F) a catalyst for the cross-linking of N-methylol compounds of the type (E) abType: GrantFiled: May 10, 1982Date of Patent: March 27, 1984Assignee: Sandoz Ltd.Inventors: James R. Runyon, Salvatore Valenti
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Patent number: 4390340Abstract: Mineral tanned leather is frequently retanned with synthetic tanning agents to improve the fullness and softness, but leather retanned by the prior art methods is difficult to dye in full shades with anionic dyes. According to the invention, condensation products of C.sub.1-4 aldehydes with certain aromatic sulfonic acids or carboxylic acids containing amino groups are employed for retanning, thereby improving the receptivity of the leather for anionic dyes. These acids have the general formula ##STR1## where X and X' are independently H, --CH.sub.2 --SO.sub.3 H or --CH.sub.2 --OH, A is a benzene radical, Y and Z are independently H, --SO.sub.3 H or --CO.sub.2 H, R is H or C.sub.1-4 -alkyl and n is from 0 to 10, with the proviso that at least one sulfonic acid or carboxyl group is present in the molecule.Type: GrantFiled: June 30, 1981Date of Patent: June 28, 1983Assignee: BASF AktiengesellschaftInventor: Dietrich Lach
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Patent number: 4383077Abstract: Disclosed are novel water-soluble, thermosettable resinous compositions derived by reacting a precondensate of dicyandiamide, formaldehyde, a salt of a water-soluble polyaminopolyamide and an ammonium salt with urea and then condensing the reaction product with additional formaldehyde. The resinous compositions are cationic and have particular utility in the manufacture of paper sized with cellulose reactive sizing agents such as ketene dimer sizing agents.Type: GrantFiled: December 8, 1981Date of Patent: May 10, 1983Assignee: Hercules IncorporatedInventor: Ralph A. Bankert
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Patent number: 4316005Abstract: A cationic adsorption agent which is obtained by reaction of(a) an amino compound which contains at least one amino group and at least one free or methylolated carboxamide group, with(b) an aminoplast precondensate which does not contain amino groups.The novel adsorption agent is suitable in particular for removing anionic substances, such as acid dyes or reactive dyes, from aqueous solutions, especially from wastewaters.Type: GrantFiled: June 23, 1980Date of Patent: February 16, 1982Assignee: Ciba-Geigy CorporationInventors: Rudolf F. Wurster, Jurg Merz
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Patent number: 4297264Abstract: An improved process for the preparation of alkoxylated formaldehyde-amino compound resins. By using a sequential procedure, and an alkanol of up to 8 carbon atoms it is possible to remove both the water in the aqueous formaldehyde used and the water from the alkoxylation reaction azeotropically. The products of this invention afford resins of better quality, especially in terms of color and clarity, than the products derived from alcoholic formaldehyde solutions.Type: GrantFiled: June 6, 1980Date of Patent: October 27, 1981Assignee: Reichhold LimitedInventors: Robert S. De Ruiter, Stamatis M. Kambanis
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Patent number: 4267235Abstract: Suspension polymerization of aqueous glutaraldehyde in basic conditions in presence of surfactants such as isobutoxy acrylamide copolymers and/or cross-linking agents yield cross-linked, water insoluble glutaraldehyde polymer microspheres ranging in size from 200 A to 10.mu.. Addition of fluorochromes, e.g., FITC, during polymerization yields microspheres of high fluorescent intensity and addition of a suspension of metal containing particles such as Fe.sub.3 O.sub.4 during polymerization yields magnetic microspheres. Immunopolyglutaraldehyde microspheres can be obtained by interacting the polyglutaraldehyde microspheres with antibodies. The immunomicrospheres were used to label and separate cell subpopulations. The labeling specificity is considerably improved by increasing the amount of isobutoxy polyacrylamide incorporated in the microspheres.Type: GrantFiled: March 19, 1979Date of Patent: May 12, 1981Assignee: California Institute of TechnologyInventors: Alan Rembaum, Shlomo Margel
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Patent number: 4267234Abstract: Polyglutaraldehyde (PGL) is polymerized in aqueous base or in aqueous highly polar solvent basic media to prepare powders, castable films or coatings for substrates such as amine substituted microbeads. PGL microspheres can be prepared by suspension polymerization in presence of a surfactant or by precipitating PGL from solution containing surfactant. Magnetic PGL microspheres are formed by suspension polymerization in the presence of magnetic particles such as iron oxide. Polyglutaraldehyde can be converted to a fluorescent polymer by reaction with m-aminophenol or other reagent. Proteins can be readily covalently bound to the polyglutaraldehyde.Type: GrantFiled: March 19, 1979Date of Patent: May 12, 1981Assignee: California Institute of TechnologyInventor: Alan Rembaum