Abstract: Concentrated storage-stable quaternary styryl dye solutions useful to dye paper, the solutions comprising, by weight,I. 20% to 40% of the dye ##STR1## wherein A is an anion, II. 30% TO 50% OF AT LEAST ONE OF ACETIC ACID AND PROPIONIC ACID,Iii. 10% to 40% of at least one acrylic acid and methacrylic acid, andIv. 3.3% to 4.5% of water.
Abstract: An improved aqueous-organic solvent solution, having a pH between 10 and 13, of the disazo dye ##STR1## wherein X is a cation, preferably the sodium or lithium cation, having therein a combination ofI. 0.1% to 10%, by total weight, of a particular anionic surfactant, andIi. 0.1% to 10.0%, by total weight, of a particular nonionic surfactant.
Abstract: Disperse monoazo dyes, useful for the dyeing and printing of polyester, polyamide and cellulose acetate fibers in navy-blue shades, having the formula ##STR1## wherein R.sub.1 is Br, Cl or CN; R.sub.2 is CN or NO.sub.2 ; is C.sub.2-4 --alkylene; and R.sub.4 is a selected aliphatic, cycloaliphatic, or aromatic radical.
Abstract: Mannich condensation products useful in gasoline as carburetor detergents; the condensation compositions having the formula ##STR1## wherein Z is an alkyl - and hydroxy - substituted benzyl group wherein the alkyl has 20 to 1000 carbon atoms, n is 2 or 3; R is an alkyl of 1 to 20 carbon atoms; a, x and c are each 0 or 1; and b is 0 to 5; with the provisos that when a = 0, then b is at least 1 and c = 1; when a = 1 and x = 0, then b and c = 0; and when a = 1 and x = 1, then c = 1.
Abstract: Dye solutions having excellent Kusters dye bath stability comprising, by weight,I. 10% to 20% of a dye of the formula ##STR1## wherein R is H or Cl, and X is a mixture of di- and tri-C.sub.1-4 alkanolammonium,Ii. 15% to 30% of n-butanol,Iii. 10% to 20% of ethyleneglycol,Iv. 10% to 20% of nonionic polyethylene oxide-polypropylene oxide copolymer surfactant,V. 5% to 10% of nonionic polyethoxylated aliphatic amine surfactant, andVi. 0 to 50% water.
Abstract: A continuous process for preparing particulate microporous, open-celled polymer structures in a co-rotating twin-screw processor comprising agitating normally solid organic polymer and chlorofluorocarbon in the melt zone of said processor, cooling the resulting solution under agitation in the cooling and milling zone, extruding a snow-like mass from the cooling and milling zone, and then removing the chlorofluorocarbon from the snow-like mass to leave the polymer structures.
Type:
Grant
Filed:
May 12, 1975
Date of Patent:
August 9, 1977
Assignee:
E. I. Du Pont de Nemours and Company
Inventors:
Francis Edward Jenkins, Daniel Gregory Tynan
Abstract: A combination of diamine and higher polyamine Mannich condensation products useful in gasoline as carburetor detergents and useful also to control intake valve deposits and quick-heat intake manifold deposits; the diamine being ZNHC.sub.n H.sub.2n NHZ and the polyamine being ZNH(C.sub.x H.sub.2x N(R')).sub.y --C.sub.x H.sub.2x NHZ wherein Z is an alkyl- and hydroxy-substituted benzyl, the alkyl having 50 to 1000 carbon atoms; R' is hydrogen or Z with the proviso that at least one R' is hydrogen; n is 2 to 6; x is 2 or 3; and y is 1 to 5.
Abstract: A combination of monoamine and polyamine Mannich condensation products, useful in gasoline as carburetor detergents and useful also to control intake valve deposits and quick-heat intake manifold deposits; the monoamide being Z.sub.n NR.sub.3.sub.-n, and the polyamine being: ZNH(C.sub.x H.sub.2x N(R')).sub.y C.sub.x H.sub.2x NHZ wherein Z is an alkyl- and hydroxy-substituted benzyl group, the alkyl having 50 to 1000 carbon atoms; R is hydrogen or alkyl of 1 to 18 carbon atoms; n is 1 or 2; R' is hydrogen or Z with the proviso that at least one R' is hydrogen; x is 2 or 3; and y is 1 to 5.
Abstract: A solution of alkylbenzoylbenzoic acid in a solvent that resists sulfonation is contacted at or below about 95.degree. C with oleum to effect ring closure. The product alkylanthraquinone is obtained in solution from which the alkylanthraquinone can be isolated.
Abstract: Dry soil resistance and nonflame propagating characteristics are insured in textile fibers by applying thereto an aqueous dispersion containing a perfluoroalkyl ester of a carboxylic acid of from 3 to 30 carbon atoms. After the dispersion is applied, the fibers are dried at between 120.degree. to 170.degree. C.
Type:
Grant
Filed:
August 7, 1975
Date of Patent:
June 14, 1977
Assignee:
E. I. Du Pont de Nemours and Company
Inventors:
Robert Harold Dettre, Edward James Greenwood
Abstract: Electrically conductive hydrocarbon fuel compositions containing from 0.01 to 40 ppm of an antistatic polysulfone copolymer additive consisting essentially of units derived from sulfur dioxide, C.sub.6.sub.-24 1-alkene and, optionally, an olefin of the formula ##STR1## wherein A is a group having the formula, --(C.sub.x H.sub.2x)--COOH, where x is from 0 to 17, and B is hydrogen or carboxyl; and a process for preparing same.
Abstract: Pressure-sensitive compositions adaptable for use as elastic resistors over a wide pressure range, useful as keyboard switches or vehicle-crash sensors, comprising hard, metallic-conductive particles insulatively distributed in elastomer.
Type:
Grant
Filed:
March 27, 1975
Date of Patent:
June 7, 1977
Assignee:
E. I. Du Pont de Nemours & Company
Inventors:
John Charles Harden, Sebastian V. R. Mastrangelo
Abstract: Improved concentrated dye solutions comprising anionic monosulfonated anthraquinone dye, the cations including alkanolammonium cations, in a mixed solvent of water and an inert organic cosolvent, the improvement comprising the addition thereto of about 0.03 to 0.20 part by weight, per part of dye of ethylenediaminetetraacetic acid, diethylenetriaminepentaacetic acid, or N-hydroxyethylethylenediaminetriacetic acid, said dye solution containing no more than about 0.2 percent, based on total solution weight, of cations other than alkanolammonium cations.
Abstract: A relatively small amount of a volatile compound which is completely vaporized when applied to a fire and has a heat of combustion between about 8 to 13.5 kilocalories per gram is combined with bromotrifluoromethane for use in extinguishing fires of materials having heats of combustion between about 2.5 to 5 kilocalories per gram.
Abstract: Water-soluble polyazo direct dyes for paper and other cellulosics having the formula ##SPC1##Wherein:R is selected from unsubstituted phenyl, unsubstituted naphthyl, phenyl substituted with up to 3 substituents and naphthyl substituted with up to 3 substituents, said substituents selected from the group methyl, ethyl, methoxy, ethoxy, sulfonic acid, benzothiazolyl, and chlorotrimethylammonium acetyl, andX, y and Z are substituted so as to give derivatives of at least one of 1-amino-8-naphthol-4,6-disulfonic acid, 1-amino-8-naphthol-3,6-disulfonic acid, and 1-amino-8-naphthol-4-sulfonic acid.
Abstract: An improved antioxidant composition comprising hindered phenol antioxidant wherein the improvement comprises, in combination with the hindered phenol, from about 1% to 10%, by total weight, of at least one amino compound having a pKb of from 0.3 to 8.0.
Abstract: An improved process and apparatus for measuring fuel octane numbers in a knock test engine of a multiplicity of fuels, using at least one fuel of known octane number as a reference, wherein fuel feed means, memory means, and calculating means cooperate so that the fuel feed means selects the fuel source and the fuel feed-rate for that fuel source, the memory means receives the knock intensity values generated in the test engine and the corresponding fuel feed-rate settings, the calculating means (a) determines the approximate feed-rate setting that corresponds to the maximum knock intensity, (b) provides a series of feed-rate settings bracketing said approximate feed-rate setting and generates a corresponding set of knock intensity values, (c) determines the refined feed-rate setting that corresponds to maximum knock intensity, (d) sends said setting to the memory means for storage, and (e) from the knock intensities that are generated during subsequent comparison of the fuels of known and unknown octane numb
Abstract: Solution of a mixture of isomers of naphthylazophenylazonaphthyl dye containing two sulfonate substituents, the solution comprising said dye, water, triethanolamine, lithium base and urea. The dyes have good solubility and substantivity and are useful among other things, for dyeing cellulosic substrates.
Abstract: Biscationic disazo dyes having good exhaust and buildup on acid-modified BCF nylon fibers as well as good lightfastness and wetfastness on such fibers; and a process for dyeing nylon therewith at a pH of about 4 to 7. The dyes have the formula: ##SPC1##WhereinX is selected from --CH.sub.2 --, --C(CH.sub.3).sub.2 --, --NH--, --O--, --OCH.sub.2 (CH.sub.2).sub.1.sub.-2 O--, --OCH.sub.2 CH(OH)CH.sub.2 O--, --SO.sub.2 --, --S--, --S--S--, --NHCO--, and --NHCONH--;R.sub.1 is selected from H, CH.sub.3, C.sub.2 H.sub.5, Cl, and Br;R.sub.2 is selected from H, alkyl, alkoxy, Cl, NHCO-alkyl, and NHCOC.sub.6 H.sub.5 ;R.sub.3 is selected from H, alkyl, and alkoxy;Y.sup.+ is selected from ##EQU1## whereinn is 0 or 1;Z is H when n is 0 and Z is OH when n is 1;Q.sup.+ is selected from NR.sub.4 R.sub.5 R.sub.6, and NHCOCH.sub.2 NR.sub.4 R.sub.5 R.sub.6 ;R.sub.4 and R.sub.5 together with the nitrogen atom form a piperidinium pyrrolidinium, or morpholinium ring, or, together with R.sub.6, form a pyridinium ring;R.sub.
Abstract: A process for making yellow, basic azomethine dyes for paper, leather and textiles, and concentrated, stable solutions thereof; the process being an improvement in the process of reacting an azo dye base precursor of the formula ##SPC1##Wherein A is phenyl or substituted phenyl, with dimethyl sulfate in solution, and in the presence of an acid-binding agent,THE IMPROVEMENT COMPRISING EMPLOYING AN AQUEOUS SOLUTION HAVING AT LEAST 30 WEIGHT PERCENT WATER, EMPLOYING DIMETHYL SULFATE IN A MOLAR EXCESS OF FROM 100% TO 300%, AND EMPLOYING FROM 2.0 TO 3.5 MOLES OF MAGNESIUM OXIDE AS THE ACID-BINDING AGENT PER MOLE OF PRECURSOR.