Patents Assigned to Dynapol
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Patent number: 4332830Abstract: Analogs of the glycoside stevioside are disclosed. These materials have the formula ##STR1## wherein R.sub.1 and R.sub.2 are as follows:______________________________________ R.sub.1 R.sub.2 ______________________________________ --(CH.sub.2).sub.3 SO.sub.3.sup.- M.sup.+ .beta.-D--Sophorose --(CH.sub.2).sub.3 SO.sub.3.sup.- M.sup.+ --(CH.sub.2).sub.3 SO.sub.3.sup.- M.sup.+ --H --(CH.sub.2).sub.3 SO.sub. 3.sup.- M.sup.+ ______________________________________and M.sup.+ is a physiologically acceptable alkali metal cation.Type: GrantFiled: September 22, 1980Date of Patent: June 1, 1982Assignee: DynapolInventor: Grant E. DuBois
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Patent number: 4316918Abstract: Polymeric red colors having the structure ##STR1## wherein R.sub.1 and R.sub.2 are independently selected from among hydrogen, halos, lower alkyls, lower alkoxies, nitros, and sulfonates, R.sub.3 is selected from hydrogens, alkyls and alkylsulfonates, and R.sub.4 is an alkyl-containing polymer linking a plurality (n) of anthraquinones into a polymeric colorant are disclosed to be used as nonabsorbable colorants for edibles and cosmetics. They may also be used in such substrates as lakes.Type: GrantFiled: June 24, 1980Date of Patent: February 23, 1982Assignee: DynapolInventor: Leonard A. Bunes
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Patent number: 4309543Abstract: A process for preparing cyclic amides from an optionally substituted acetic acid and an aromatic aminocarbonyl compound is disclosed. The process employs a promoter comprising tetravalent titanium or silicon and a pyridine compound to effect formation of the cyclic amides.Type: GrantFiled: March 17, 1980Date of Patent: January 5, 1982Assignee: DynapolInventor: Donald E. Keeley
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Patent number: 4302399Abstract: Acetylation of residual primary and secondary alkyl amine groups in polymeric colorants, when said colorants are in the form of a crude preparation reaction mixture, is disclosed. The acetylation improves the colorants' water solubility.Type: GrantFiled: March 10, 1980Date of Patent: November 24, 1981Assignee: DynapolInventors: Daniel J. Dawson, Robert E. Wingard, Guy A. Crosby
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Patent number: 4298595Abstract: An intestinal anti-inflammatory preparation comprising a polymeric agent for releasing 5-aminosalicylic acid or its salts is disclosed. The polymeric agent comprises a nonabsorbable pharmacologically acceptable organic polymer backbone containing aromatic rings to which are covalently bonded via azo bonds a plurality of salicylic acid or salicylate salt groups. The azo bonds attach to the salicylates' 5-position carbon. The polymer's azo bonds undergo bacterial cleavage in the mammalian lower bowel to release 5-aminosalicylic acid and/or its salts.Type: GrantFiled: November 29, 1979Date of Patent: November 3, 1981Assignee: DynapolInventors: Thomas M. Parkinson, Joseph P. Brown, Robert E. Wingard, Jr.
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Patent number: 4290957Abstract: Dihydrochalcones of the formula ##STR1## are disclosed wherein X is H or OH and R is a lower alkyl. These materials are useful as sweeteners for edibles. A process for preparing these compounds using a novel intermediate is disclosed as are acid and base neutralization products of the subject dihydrochalcones.Type: GrantFiled: December 12, 1979Date of Patent: September 22, 1981Assignee: DynapolInventors: Grant E. Du Bois, Rebecca A. G. Stephenson, Guy A. Crosby
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Patent number: 4279662Abstract: Polymeric red colors having the structure ##STR1## wherein R.sub.1 and R.sub.2 are independently selected from among hydrogen, halos, lower alkyls, lower alkoxies, nitros, and sulfonates, R.sub.3 is selected from hydrogens, alkyls and alkylsulfonates, and R.sub.4 is an alkyl-containing polymer linking a plurality (n) of anthraquinones into a polymeric colorant are disclosed to be used as nonabsorbable colorants for edibles and cosmetics. They may also be used in such substrates as lakes.Type: GrantFiled: May 17, 1979Date of Patent: July 21, 1981Assignee: DynapolInventor: Leonard A. Bunes
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Patent number: 4275002Abstract: Polymeric colorants are prepared by the process of (a) reacting acetaldehyde and acetamide in a mole ratio of 1:2-4 with an acid catalyst to form ethylidene-bis-acetamide, (b) cracking the ethylidene-bis-acetamide to vinylacetamide, (c) polymerizing the vinylacetamide with a free-radical catalyst, (d) hydrolyzing the resulting polymer with mineral acid and neutralizing with base to yield poly(vinylamine), and (e) coupling monomeric optically chromophoric groups to amine nitrogens of the poly(vinylamine).Type: GrantFiled: January 17, 1977Date of Patent: June 23, 1981Assignee: DynapolInventors: Richard D. Gless, Jr., Daniel J. Dawson, Robert E. Wingard
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Patent number: 4267165Abstract: Dihydrochalcones of the formula ##STR1## are disclosed wherein X is H or OH and R is a lower alkyl. These materials are useful as sweeteners for edibles. A process for preparing these compounds using a novel intermediate is disclosed as are acid and base neutralization products of the subject dihydrochalcones.Type: GrantFiled: December 12, 1979Date of Patent: May 12, 1981Assignee: DynapolInventors: Grant E. DuBois, Rebecca A. G. Stephenson, Guy A. Crosby
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Patent number: 4260714Abstract: Copolymers of acetamidoethylene are disclosed. These materials have randomly distributed units represented by the formula ##STR1## wherein R is one or more radicals selected from the group ##STR2## and the C.sub.1 to C.sub.6 carboxylic acid esters thereof, ##STR3## wherein R.sup.1 is hydrogen or a C.sub.1 to C.sub.6 alkyl, and R.sup.2 is a C.sub.1 to C.sub.6 alky; x and y are numbers greater than zero which total to 1.00; the ratio of x to y from about 0.05:0.95 to about 0.95:0.05; and n is an integer from about 14 to about 10,000.The copolymers are useful as epoxy resin curing agents, as components of protective or decorative coatings, and as intermediates in the formation of vinylamine group-containing copolymers having the formulae ##STR4## wherein x, y and n are as previously defined, x' plus z equals x and R.sup.3 is one or more of the radicals selected from the group ##STR5## wherein R.sup.1 and R.sup.2 are as previously defined.Type: GrantFiled: May 18, 1979Date of Patent: April 7, 1981Assignee: DynapolInventors: Robert E. Wingard, Jr., William J. Leonard, Jr.
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Patent number: 4258189Abstract: A process for preparing a family of orange polymeric colorants having a plurality of units of the chromophore ##STR1## is disclosed. R.sub.1 and R.sub.2 are hydrogens, lower alkyls or alkoxies, nitros, halos or sulfonates, R.sub.3 is benzyl, benzyl sulfonate, lower alkyl or alkyl sulfonate, R.sub.4 is hydrogen or lower alkyl. With the disclosed process, the chromophore units, less the R.sub.3 substituent, are bonded to an organic polymer backbone. The R.sub.3 substituent is added thereafter in a separate second step.Type: GrantFiled: October 30, 1978Date of Patent: March 24, 1981Assignee: DynapolInventors: Patricia C. Wang, Robert E. Wingard, Jr., Leonard A. Bunes
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Patent number: 4255548Abstract: Copolymers of ethylene and vinylamine are disclosed as are methods for their production. The disclosed copolymers find application primarily as flocculants.Type: GrantFiled: January 7, 1980Date of Patent: March 10, 1981Assignee: DynapolInventors: Robert E. Wingard, Jr., Eric R. Larson
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Patent number: 4250327Abstract: A group of water-soluble polymeric yellow colors and their preparation is disclosed. These colors comprise a plurality of units of a chromophore of the formula ##STR1## wherein M.sup.+ is a pharmaceutically acceptable monovalent cation attached directly to amine units present in a nonchromophoric polymer backbone. In a preferred embodiment of the invention the backbone is a homopolymer or copolymer of vinylamine. These colorants find special utility as nonabsorbable colorants for edibles, especially foods and beverages, where their yellow hue is an excellent color match for existing monomeric azo food colors such as tartrazine, and as components of acid-insoluble pigment lakes which are themselves suitable for use in edibles.Type: GrantFiled: January 2, 1979Date of Patent: February 10, 1981Assignee: DynapolInventors: Daniel J. Dawson, Kenneth M. Otteson, Roman Davis
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Patent number: 4249007Abstract: Red colors having the anthraquinone structure ##STR1## are disclosed wherein R.sub.1 and R.sub.2 are independently selected from among hydrogen, halos, lower alkyls, lower alkoxies, nitros, and sulfonates, and R.sub.3 and R.sub.4 are independently selected from hydrogens, alkyls and alkylsulfonates. Precursors are disclosed as well. In a preferred embodiment R.sub.4 is an alkyl-containing polymer linking a plurality of anthraquinones into a polymeric colorant especially useful as a nonabsorbable colorant for edibles.Type: GrantFiled: May 2, 1979Date of Patent: February 3, 1981Assignee: DynapolInventor: Leonard A. Bunes
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Patent number: 4238579Abstract: Vinylamine copolymers are disclosed. These copolymers have randomly distributed repeating units represented by the formula ##STR1## wherein Ar is optionally substituted phenyl, the substituents independently selected from C.sub.1 to C.sub.6 alkyl, C.sub.1 to C.sub.6 alkoxy and halo; x and y are numbers greater than zero which total 1.0, the ratio of x to y from about 0.05:0.95 to about 0.95:0.05; and n is an integer from about 14 to about 10,000. Acid addition salts of these copolymers are also disclosed, as are vinylacetamide/aromatic hydrolysis precursors and the terpolymeric vinylamine/vinylacetamide/aromatic products of partial hydrolysis. The copolymers are useful as epoxy resin-curing agents and as components of protective or decorative coatings.Type: GrantFiled: May 18, 1979Date of Patent: December 9, 1980Assignee: DynapolInventors: William J. Leonard, Jr., Robert E. Wingard, Jr.
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Patent number: 4233328Abstract: A group of water-soluble polymeric yellow colors and their preparation is disclosed. These colors comprise a plurality of units of a chromophore of the formula ##STR1## wherein M.sup.+ is a pharmaceutically acceptable monovalent cation, attached directly to amine units present in a nonchromophoric polymer backbone. In a preferred embodiment of the invention the backbone is a homopolymer or copolymer of vinylamine. These colorants find special utility as nonabsorbable colorants for edibles, especially foods and beverages, where their yellow hue is an excellent color match for existing monomeric azo food colors such as tartrazine, and as components of acid-insoluble pigment lakes which are themselves suitable for use in edibles.Type: GrantFiled: October 4, 1978Date of Patent: November 11, 1980Assignee: DynapolInventors: Daniel J. Dawson, Kenneth M. Otteson, Roman Davis
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Patent number: 4226804Abstract: Dihydrochalcones of the formula ##STR1## are disclosed wherein X is H or OH and R is lower alkyl. These materials are useful as sweeteners for edibles. A process for preparing these compounds using a novel intermediate is disclosed as are acid and base neutralization products of the subject dihydrochalcones.Type: GrantFiled: March 9, 1979Date of Patent: October 7, 1980Assignee: DynapolInventors: Grant E. DuBois, Rebecca A. G. Stephenson, Guy A. Crosby
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Patent number: 4225432Abstract: The ultrafiltration purification of aqueous solutions of polymeric colorants, wherein low molecular weight impurities are removed in an ultrafiltrate leaving a purified polymeric colorant-bearing retentate, is carried out with improved efficiency when during at least 2 diavolumes of ultrafiltration, the pH of the retentate is maintained above about pH 9.0.Type: GrantFiled: November 18, 1976Date of Patent: September 30, 1980Assignee: DynapolInventors: Robin G. Booth, Anthony R. Cooper
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Patent number: 4217214Abstract: High molecular weight polyvinylamine hydrochloride for use as a flocculating agent in waste water systems is disclosed.Type: GrantFiled: October 10, 1978Date of Patent: August 12, 1980Assignee: DynapolInventor: Paul L. Dubin
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Patent number: RE30362Abstract: Poly(vinylamine salts of mineral acids are produced by reacting acetaldehyde and acetamide at a mole ratio of 1:2-4 with acid catalyst, cracking the ethylidene-bisacetamide which results into vinylacetamide, polymerizing the vinylacetamide with a free radical polymerization catalyst, and hydrolyzing the poly(vinylacetamide) to the desired amine salts by contacting the polyvinylacetamide with an aqueous solution of the corresponding mineral acid. This product may be converted to the free amine, which in turn may function as a precursor in the manufacture of certain polymeric dyes and colorants.Type: GrantFiled: April 17, 1979Date of Patent: August 5, 1980Assignee: DynapolInventors: Richard D. Gless, Jr., Daniel J. Dawson, Robert E. Wingard, Jr.