Showing papers on "Carboxylic acid published in 1970"

Injection molded branched polyesters

Abstract: Polyester moulding materials which can be injection moulded on a technical scale to give products having good mechanical properties are obtained by having present in the polyesterification mixture, besides a terephthalic or mainly terephthalic acid component and a diol component, 0.05-3 moles percent, on the acid component, of a compound containing at least 3, preferably 3 or 4, ester-forming groups this may for example be a tri- or tetra-carboxylic acid, a triol or tetrol, or a hydroxy carboxylic acid containing in all 3 or more ester-forming groups.

Poly(carboxylic acid)-fluoroalumino-silicate glass surgical cement

Abstract: A SURGICAL CEMENT PACK COMPRISES AS ONE COMPONENT FLUOROALUMINOSILICATE GLASS POWDER WHEREIN THE RATIO BY WEIGHT OF SILCIA TO ALUMINA IS FROM 1.5 TO 2.0 AND THE RATIO BY WEIGHT OF FLUORINE TO ALUMINA IS FROM 0.6 TO 2.5, OR WHEREIN THE RATIO BY WEIGHT OF SILICA TO ALUMINA IS FROM 0.5 TO 1.5 AND THE RATIO BY WEIGHT OF FLUORINE TO ALUMINA IS FROM 0.25 TO 2.0, AND AS ANOTHER COMPONENT A SURGICALLY ACCEPTABLE WATER SOLUBLE POLY(CARBOXYLIC ACID) HAVING A RELATIVE VISCOSITY FROM 1.05 TO 2.00. THE POLY(CARBOXYLIC ACID) IS PREFERABLY IN THE FORM OF AN AQUEOUS SOLUTION. ON MIXING THE FLUOROALUMINOSILICATE GLASS POWDER AND THE AQUEOUS SOLUTION OF THE POLY(CARBOXYLIC ACID) THERE IS OBTAINED A MASS THAT REMAINS PLASTIE LONG ENOUGH TO BE FORMED INTO A DESIRED SHAPE PRIOR TO HARDENING AS A SURGICAL CEMENT.

Analysis of nonvolatile oxidation products of polypropylene. III. Photodegradation

Abstract: The nonvolatile oxidation products of photodegraded polypropylene have been analyzed by infrared spectroscopy and chemical reactions. The major functional group is ester followed by vinyl alkene, then acid. In comparison, thermally oxidized polypropylene contains relatively more aldehyde, ketone, and γ-lactone and much less ester and vinyl alkene. Photodegraded polyethylene contains mostly vinyl alkene followed by carboxylic acid. Gel-permeation chromatography (GPC) determined the decrease in polypropylene molecular weights with exposure time. A calculation determined that there is one functional group formed per chain scission; in thermal oxidation there are two groups formed per scission.

4-(isoquinolin-1-yl) piperazine-1-carboxylic acid esters

Abstract: 4-(ISOQUINOLIN-1-YL)-PIPERAZINE-1-CARBOXYLIC ACID, ESTERS AND 1-AMINO-6,7-DIALKOXYISOQUINOLINES AND THEIR PHARMACEUTICALLY-ACCEPTABLE ACID ADDITION SALTS. COMPOUNDS MANIFEST BRONCHODILATOR ACTIVITY AND ANTIHYPERTENSIVE RESPONSE WITH MINIMAL ADVERSE EFFECTS UPON ADMINISTRATION TO AFFLICTED SUBJECTS.

Phenoxy carboxylic acid derivative

Abstract: Novel anti-atherosclerosis agents having the formula, WHEREIN TYPICAL EXAMPLES OF R1 and R2 are hydrogen, C1-C8 alkyl, phenyl, benzyl and phenethyl, or R1 and R2 may form cycloalkylidene together with a carbon atom bonded therewith; R3 and R4 each is hydrogen or C1-C4 alkyl; Y is hydroxyl, C1-C4 alkoxy, phenoxy or an amine residue; A is hydrogen or a group of the formula, WHEREIN R3, R4 and Y have the same meanings as defined above; and D and E each is hydrogen or halogen. These compounds are produced, for example, by reacting a bisphenolic compound of the formula, in the presence of an alkali. Alternatively, they are produced by reacting the bisphenolic compound with Alpha -halogeno- or Alpha -hydroxycarboxylic acid derivative of the formula, WHEREIN R1, R2, R3, R4, D, E and Y have the same meanings as defined above; and X is halogen or hydroxyl.

Polymeric thickeners and method of preparing same

Abstract: A POLYMERIC SURFACTANT THICKENER COMPRISING A COPOLYMER OF AN ESTER OF AN ALKYLARYLPOLYETHER ALCOHOL, SUCH AS AN ALKYLPHENOXYPOLYETHYLENEOXYETHANOL, WITH AN UNSATURATED CARBOXYLIC ACID COMPOUND, SUCH AS ACRYLIC OR METHACRYLIC ACID, AND AN UNSATURATED ACID COMPOUND, WHICH COPOLYMER COMPRISES FROM ABOUT 70 TO 95% OF THE ESTER AND FROM ABOUT 5 TO 30% OF THE UNSATURATED CARBOXYLIC ACID, AND WHICH COPOLYMER CONTAINS FROM ABOUT 20 TO 100 OXYETHYLENE GROUPS. THE POLYMERIC SURFACTANT THICKENER IS PARTICULARLY USEFUL IN THICKENING POLYMERIC LAXTEX COMPOSITIONS, SUCH AS CARBOXYLATED STYRENE-BUTADIENE LATEX CONTAINING FILLER MATERIAL.

Process for the preparation of bis-maleimides

Abstract: 1. IN A PROCESS FOR THE PREPARATION OF BIS-MALEIMIDES, WHICH COMPRISES EFFECTING REACTION BETWEEN A BIS-MALEAMIC ACID WHICH HAS THE GENERAL FORMULA HOOC-CH=CH-CO-NH-D-NH-CO-CH=CH-COOH IN WHICH D HAS ONE OF THE FOLLOWING MEANINGS: A LINEAR OR BRANCHED ALKYLENE RADICAL OF 2-12 CARBON ATOMS; PHENYLENE; CYCLOHEXYLENE; NAPHTHYLENE; A PLURALITY OF PHENYLENE OR CYCLOHEXYLENE RADICALS LINKED BY A SIMPLE VALENCY BOND OR BY AN ATOM OR GROUP WHICH IS INERT UNDER THE REACTION CONDITIONS; AND A LOWER CARBOXYLIC ACID ANHYDRIDE IN THE PRESENCE OF A TERTIARY AMINE AND AN ORGANIC DILUENT WHICH IS LIQUID UNDER THE REACTION CONDITIONS, THE IMPROVEMENT WHEREIN THE REACTION IS CARRIED OUT IN THE PRESENCE OF A CATALYTIC AMOUNT OF A CATALYST CONSISTING OF A NICKEL SALT OR DIVALENT NICKEL COMPLEX WHICH IS SOLUBLE IN THE LIQUID PHASE OF THE REACTION MIXTURE, FROM 0.2 TO 1 MOLE OF TERTIARY AMINE BEING USED PER MOLE OF BIS-MALEAMIC ACID.

Nitrogen heterocycles for therapeutic administration

Abstract: SUBSTITUTED 6,7-DIALKOXYQUINAZOLINES, 4-(6,7-DIALKOXYQUINOLIN-4-YL)-PIPERAZINE-1 - CARBOXYLIC ACID, ESTERS AND 1-AMINO-6,7-DIALKOXYISOQUINOLINES AND THEIR PHARMACEUTICALLY-ACCEPTABLE ACID ADDITION SALTS. COMPOUNDS MANIFEST BRONCHODILATOR ACTIVITY AND ANTIHYPERTENSIVE RESPONSE WITH MINIMAL ADVERSE EFFECTS UPON ADMINISTRATION TO AFFLICTED SUBJECTS.

Thiourea-acylated polyamine reaction product

Abstract: Process for post-treating certain ashless dispersants prepared from high molecular weight carboxylic acid acylating agents and polyamines with thiourea and certain reaction products thereby produced. The products are useful additives for lubricants and fuels.

Acrylic acid derivatives of 2,2,6,6-tetramethylpiperidines

Abstract: NEW ACRYLIC ACID DERIVATIVES HAVING THE FORMULAE I AND II 2,2,6,6-TETRA(CH3-),4-R1,4-(R3-CH=C(-R2)-CO-X-)PIPERIDINE 1-(R3-CH=C(-R2)-CO-),2,2,6,6-TETRA(CH3-),4-R1, 4-(R3-CH=C(-R2)-CO-X-)PIPERIDINE (II) WHEREIN R1 REPRESENTS HYDROGEN ATOM OR CYANO GROUP; R2 AND R3 MAY BE THE SAME OR DIFFERENT AND EACH REPRESENTS HYDROGEN ATOM OR METHYL GROUP; AND X REPRESENTS IMINO GROUP OR OXYGEN ATOM. THEY ARE USEFUL AS A STABILIZER FOR THE DETERIORATION OF VARIOUS SYNTHETIC POLYMERS AND ALSO COPOLYMERIZED TO FORM NEW HIGHLY LIGHT-STABLE POLYMERIC COMPOUNDS. THE ACRYLIC ACID DERIVATIVES (I) AND (II) ARE PRODUCED BY REACTING A PIPERIDINE DERIVATIVE HAVING THE FORMULA 2,2,6,6-TETRA(CH3-),4-R1,4-(H-X-)PIPERIDINE (III) WHEREIN R1 AND X ARE AS DEFINED ABOVE WITH A REACTIVE DERIVATIVE OF AN UNSATURATED ALIPHATIC CARBOXYLIC ACID HAVING THE FORMULA R3-CH=C(-R2)-COOH WHEREIN R2 ND R3 ARE AS DEFINED ABOVE.

Microbial Modification of Mycophenolic Acid

Abstract: On incubation with selected micro-organisms mycophenolic acid (1) has been found to undergo one or more of the following transformations: (a) oxygenation of the 4-methyl group giving an alcohol (5) and an aldehyde (6), (b) oxygenation of the 3′-methyl group and lactonisation giving a δ-lactone (31), (c) oxidation at C-3 giving a lactol (3), (d) loss of the double bond and oxidation at C-4′, giving a β-hydroxy-acid (18), a methyl ketone (14), a carboxylic acid (10), and, by further hydroxylation, a lactol (11), a benzyl alcohol (12), and a dihydrobenzofuran (29), (e) oxygenation of the double bond giving a hydroxy-lactone (21), (f) oxygenation and cyclisation of the terpenoid substituent giving dihydrobenzofurans (26) and (28), (g) oxidative cyclisation of the terpenoid substituent giving a chromen (30), and (h) combination of the carboxy-group with the amino-groups of glycine and alanine giving amides (15) and (16). Lactones (20) and (22) and diphenylmethane (32) were also obtained from mycophenolic acid fermentations but these compounds may have been artefacts generated during work-up. Fermentations of mycophenolic acid methyl ether (2) and of compound (9) gave the benzyl alcohols (7) and (5) respectively, and fermentations of dihydromycophenolic acid gave compounds (10), (11), and (29). The structures of the fermentation products have been established by spectroscopic methods and most of the compounds have been chemically related to mycophenolic acid. The biogenesis of the fermentation products is discussed and some preparations of cyclic ethers from mycophenolic acid derivatives are described.

Reaction product of carboxylic acid with degraded ethylene-propylene interpolymer

Abstract: An oxidized, degraded interpolymer of ethylene and propylene is reacted with an unsaturated acid or derivative thereof, preferably maleic acid or anhydride, to form an acidic intermediate. This acidic intermediate is reacted with a polyamine to form a product which is useful as an additive in fuels, lubricant compositions and hydrocarbon oils.

High molecular weight carboxylic acid acylating agents and the process for preparing the same

Abstract: Process for preparing high molecular weight polycarboxylic acid acylating agents by contacting chlorine with a reaction mixture comprising (1) high molecular weight monocarboxylic acid and ethylenically unsaturated low molecular weight mono- or polycarboxylic acid acylating agent or (2) high molecular weight aliphatic hydrocarbon, ethylenically unsaturated low molecular weight monocarboxylic acid acylating agent, and ethylenically unsaturated low molecular weight polycarboxylic acid acylating agent. Acylating agents thus produced have utility, for example, as intermediates in the preparation of acylated nitrogen compounds, esters, metal salts, and the like which are useful as additives in lubricants and fuels.

Bifunctional cation exchange membranes and their use in electrolyticcells

Abstract: A cation exchange membrane containing functional groups of both the sulfonic acid and carboxylic acid radicals which allows the membranes to maintain its conductivity throughout the entire pH range. This unique property gives this high capacity -pH insensitive membrane particular value in electrolytic cells as hydraulic diaphragms to separate a basic solution from an acid solution as is encountered in caustic-chlorine cells or other type cells which electrolytically decompose neutral salt solutions such as sodium sulfate into their basic and acidic components of caustic soda and sodium acid sulfate. The capacity of this membrane is much higher than the presently known sulfonic acid salt types.

Acidizing high-temperature wells

Abstract: A high-temperature earth formation is acidized by injecting down a well and into the formation a water-soluble ester of an organic carboxylic acid which forms a calcium salt which is also watersoluble. The formation should be at a temperature of at least about 200* F., and preferably at least about 300* F. Water may be injected before, after, or with the ester. The well is preferably shut-in after injecting the ester to permit more complete hydrolysis of the ester before the well is returned to its usual operation. Various combinations of esters or combinations of esters and free acids can be used. The ester may be injected as a solution in aqueous or nonaqueous solvents. Preferred esters are methyl formate and ethyl acetate.

Acid imidazolines carboxylic acid salts of 1-aminoalkyl-2-polymerized carboxylic fatty

Abstract: NORMAL AND ACID SALTS OF SUBSTITUTED IMIDAZOLINES AND SATURATED ALIPHATIC MONO- AND DICARBOXYLIC ACIDS FOR USE IN COMPOSITIONS OF WATER SOLUBLE CORROSION INHIBITORS. CONTINUOUS OR INTERMITTENT APPLICATION OF LIQUID COATINGS OF THESE INHIBITORS ON METALS, PARTICULARLY FERROUS METALS IN CONTACT WITH SWEET AND SOUR PETROLIFEROUS WELL FLUIDS, FORM PERSISTENT FILMS WHICH AFFORD PROTECTION AGAINST CORROSION, EVEN AT ELEVATED TEMPERATURE.

Spectrally sensitized photographic emulsions

Abstract: A SILVER HALIDE LIGHT-SENDITIVE PHOTOHRAPHIC EMULSION CONTAINING AT LEAST ONE SENSITIZING DYE REPRESENTED BY THE FOLLOWING FORMULA I: (-Z1-N(+)(-R1)=)>C-CH=C(-R)-CH=C C-CH=C(-R5)-CH=C<(-Z4-N(-R4)-) (X2(-))(M-1) IN WHICH R5 IS AN ALKYL GROUP HAVING FROM 1 TO 4 CARBON ATOMS; R3 AND R4, WHICH MAY BE THE SAME OR DIFFERENT, EACH REPRESENTS AN ALKYL GROUP, AN ALLYL GROUP AND AN ALKYL GROUP SUBSTITUTED BY HYDROXY, ALKOXY, CARBOXY, SULFO OR MIXTURES THEREOF; A3 AND Z4, WHICH MAY BE THE SAME OR DIFFERENT, EACH REPRESENTS A NON-METALLIC ATOMIC GROUP NECESSARY TO COMPLETE A BENZOTHIAZOLE OR A BENZOSELENAZOLE NUCLEUS, WHICH MAY BE SUBSTITUTED BY HALOGEN, PHENYL, ALKOXPHENYL, HYDROXYPHENYL, CARBOXYPHENYL, AN ALKYL HAVING FROM 1 TO 4 CARBON ATOMS, HYDROXYL, ALKOXY, CARBOXYL, CARBOXYLIC ACID ESTER, CARBAMOYL OR ALKYL CARBAMOYL GROUPS; X2 IS AN ACID ANION AND M IS 1 OR2.

Process for preparing ionomers

Abstract: PROCESS FOR IONICALLY CROSSLINKING FIRST COPOLYMERS FORMED BY COPOLYMERIZING AT LEAST ONE APLHS-OLEFIN OF THE GENERAL FORMULA RCH=CH2 WHERE R IS HYDROGEN OR HYDROCARBYL HAVING 1 TO 8 CARBON ATOMS AND AT LEAST ONE ALPHA,BETA-ETHYLENICALLY UNSTAURATED CARBOXYLIC ACID HAVING 1 TO 2 CARBOXYLIC ACID GROUPS AND 3 TO 8 CARBON ATOMS, THE ALPHA-OLEFIN CONTENT OF THE FIRST COPOLYMER COMPRISING AT LEAST 50 MOLE PERCENT OF THE FIRST COPOLYMER, THE ALPHA,BETA-ETHYLENICALLY UNSATURATED ACID CONTENT OF SAID FIRST COPOLYMER COMPRISING 0.2 TO 25 MOLE PERCENT OF THE FIRST COPOLYMER WHICH COMPRISES MIXING THE FIRST COPOLYMER WITH A CATION-SUPPLYING BLEND OF 20 TO 80 PERCENT BY WEIGHT OF SUBSTANTIALLY WATER-INSOLUBLE METAL OXIDE AN/OR METAL HYDROXIDE AND/OR METAL CARBONATE, 0 TO 10 PERCENT BY WEIGHT OF A LUBRICANT AND A COMPLEMENTAL AMOUNT OF A SECOND COPOLYMER WITH A MELT INDEX OF 50 TO 2000G/10 MIN. FORMED AS THE FIRST COPOLYMER, AT A PRESSURE OF 100 TO 10,000 P.S.I., AT A TEMPERATURE ABOVE THE MELTING POINT OF BOTH THE FIRST AND SECOND COPOLYMERS AND BETWEEN 100*C. AND 290*C., WITH THE AMOUNT OF THE CATION-SUPPLYING BLEND PRESENT BEING THAT AMOUNT WHICH HAS SUFFICIENT CATIONS TO NEUTRALIZE AT LEAST 10% OF THE CARBOXYLIC ACID GROUPS IN THE FIRST AND SECOND COPOLYMERS AND NEUTRALIZING AT LEAST 10 PERCENT OF THE CARBOXYLIC ACID GROUPS IN THE FIRST AND SECOND COPOLYMERS.

Alkyl-sulfoxide terminated oligomers

Abstract: 1. AN OLIGOMER HAVING THE FORMULA: R-S-(CH(-R1)-C(-X)(-R2))A-(CH(-R3)-C(-Y)(-R4))B-H WHEREIN R IS A STRAIGHT OR BRANCHED CHAIN PRIMARY, SECONDARY OR TERTIARY ALKYL GROUP HAVING FROM 5 TO 20 CARBON ATOMS; R1 AND R3 ARE HYDROGEN, METHYL, ETHYL OR -COOH; R2 AND R3 ARE HYDROGEN, METHYL, ETHYL, -COOH OR CH2COOH; Y IS A STRONGLY POLAR GROUP SELECTED FROM THE GROUP CONSISTING OF -COOH, -CONH2, -OCH3, -OCH2H5 AND -CH2OH; X IS A DIFFERENT POLAR GROUP SELECTED FROM THE GROUP CONSISTING OF THE FOREGOING STRONGLY POLAR GROUPS AND -COOC2H4OH, -COOC3H6OH, -CONHCH2OH, -CONHCH3, -CONHC2H5, -CONHC3H7, -COOCH3, -COOC2H5, -CN, -OOCCH3 AND -OOCC2H5; A+B IS FROM 2 TO 50; AND A/A+B IS FROM 0.05 TO 0.6; AND WHERE THE OLIGOMER HAS AT LEAST ONE CARBOXYLIC ACID GROUP, THE SAID GROUP MAY BE IN THE FORM OF THE FREE ACID OR THE ALKALINE SALT THEREOF.

Preparation of N‐Alkylacetamides by the Anodic Oxidation of Carboxylic Acid Salts

Abstract: The possibility of preparing N‐alkylacetamides by the electrolytic oxidation of carboxylate ions at a carbon anode in the presence of acetonitrile has been investigated. A yield of substituted acetamide of about 50% was obtained with potassium valerate, but it gradually dropped to zero in favor of the Kolbe coupled product in going from potassium octanoate to potassium laurate. An explanation of this effect involving specific orientation of the adsorbed long chain carboxylates on the electrode surface is included. Products derived from intermediate carbonium ions were found, and a mechanism for their formation is proposed.