Abstract: A process for making a blend of high-density polyethylene polymers containing one or more C3 to C12 .alpha.-olefin comonomers. The process begins in two parallel streams. In one stream ethylene is polymerized alone, and in the second stream ethylene is polymerized with the comonomer(s). The two streams are combined in a subsequent reactor where the polymerization process is completed. The polymerization produces a polymer wherein the comonomer is concentrated in the higher molecular weight fractions.

Abstract: 3,4,6-Trifluorophthalic acid may be decarboxylated in a controlled manner to form 2,4,5-trifluorobenzoic acid by heating the phthalic acid in a dipolar aprotic solvent in the absence of any catalyst.

Abstract: Halophthalic anhydrides are prepared by the liquid phase reaction of a brominating agent with halogen substituted hexa- or tetra-hydrophthalic anhydrides.

Abstract: This invention relates to novel fluorinated bis-imides of the formula ##STR1## where X is H or F. The compounds are useful as additives to enhance the properties of high performance polymers such as polyimides.

Abstract: Disclosed is a method of making 3-hydroxy-2,4,5-trifluorobenzoic acid. A aqueous solution is prepared of an alkali metal base and a tetrafluorophthalimide. The solution is heated to produce a mixture of a salt of a 4-hydroxy-3,5,6-trifluorophthalamic acid and a salt of a 3-hydroxy-2,4,5-trifluorobenzamide. The solution is neutralized with acid to form a precipitate of the 4-hydroxy-3,5,6-trifluorophthalamic acid and the 3-hydroxy-2,4,5-trifluorobenzamide. The precipitate is reacted with a mineral acid to produce 3-hydroxy-2,4,5-trifluorobenzoic acid.

Abstract: A process for the preparation of a halophthalic anhydride, such as chlorophthalic anhydride, comprising the liquid phase reaction of bromine with a halogen substituted hexa- or tetra-hydrophthalic anhydride to produce halophthalic anhydride and gaseous HBr, and reacting the gaseous HBr with chlorine to regenerate bromine.

Abstract: Novel halogenated trifluoromethylbenzenes have the structural formula ##STR1## wherein X is halogen, preferably Cl, F or Br, and R is a group selected from the group consisting of --COOH, --C(O)NH.sub.2 and --CN. These compounds are intermediates for pesticidal trifluoromethyl diphenyl ethers and are converted thereto by replacing the fluorine para to the trifluoromethyl with substituted phenoxy group in aromatic nucleophilic substitution.

Abstract: In a device for combining a plurality of liquid infusions to form a mixture comprising a chamber having a circumference and a plurality of separately closable inlets for various infusion liquids and an outlet for the mixture, and improvement is provided which comprises a chamber having a first chamber portion having inlets, a second chamber portion and an elastic sealing element held in an outer region of the circumference and interposed between the first and second portions, the sealing element extending over and covering the inlets, and segments of the sealing element being prestressed against such inlets to close same, each of the inlets communicating with the chamber and the outlet when the elastic sealing element is removed from covering each such inlet, wherein the separately closable inlets are disposed radially about an axis and the outlet is disposed longitudinally along the axis, wherein the inlets are located proximate the circumference of the chamber and each inlet ends in a sealing element openin

Abstract: Bis-imides of dioxydiphthalic or oxydiphthalic anhydride, are characterized by the formula ##STR1## where Z is H, alkyl of 1-12 carbon atoms, or ##STR2## A is H, Cl, F, NO.sub.2, OH, CF.sub.3, alkyl, alkoxy, alkylaryl or aryloxy, wherein the alkyl groups are 1-6 carbon atoms and the aryl groups are 6-14 carbon atoms; alkenyl or alkynyl of 2-6 carbon atoms; or benzoyl; and Y is H, Cl, F, NO.sub.2, OH, or CF.sub.3 ; X is halogen; X' is hydrogen or halogen; or X and X' together represent an oxygen atom, forming a second ether linkage.

Abstract: Oxydiphthalic acid esters of the formula ##STR1## where Z is H or alkyl, and X is halo, X' is H or halo, or X and X' together represent an oxygen atom; are prepared by the esterification reaction of the corresponding halo-oxydiphthalic anhydride or dioxydiphthalic anhydride with an alkanol.

Abstract: p-Trifluoromethyl benzaldehydes are prepared by the catalytic reduction reaction of p-trifluoromethyl benzonitriles with hydrogen in an aqueous formic acid media in the presence of a nickel/aluminum alloy catalyst.

Abstract: This invention relates to novel fluorinated N,N-bis-imides of the formula ##STR1## wherein R is a bivalent radical of the formula ##STR2## The compounds are particularly useful as monomers in the preparation of high performance polymer.

Abstract: Novel halogenated polyimides and co-polyimides comprise recurring imide structural units of the formula ##STR1## where X is F, Cl, Br or I; Y is H, F, Cl, Br or I; and R is a divalent organic radical.

Abstract: A label for sticking or sealing on an object is characterized in that is comprises at least three (a, b, c) panel portions (1) which are connected together in a row by fold lines (2), wherein the third panel portion (c) in the row is folded over in plane-parallel relationship on to the second panel portion (b) and in a direction normal to the fold lines (2) is narrower than the second panel portion (b) and the first panel portion (a) in the row is folded over in plane-parallel relationship on to the third panel portion (c) and secured thereto.

Abstract: Dioxydiphthalic anhydride is prepared by the reaction of dihalophthalic anhydride with an alkali metal compound, such as potassium carbonate. The compound is particularly useful as a monomer in the preparation of polyimides.

Abstract: Biphenyl tetracarboxlic acid esters and derivatives thereof are prepared by the coupling reaction of 4-halogen substituted o-benzenedicarboxylic acid ester, carried out in an aprotic polar solvent in the presence of a pre-prepared triphenylphosphine-nickel chloride or trialkylphosphine-nickel chloride catalyst, zinc powder as the reducing agent, and an alkali metal halide promoting agent. The ester may be hydrolyzed in basic solution to afford the corresponding acid. The acid may be heated or boiled with acetic anhydride to afford the biphenyl dianhydride.

Abstract: Halophthalic anhydrides are prepared by the liquid phase reaction of a brominating agent with halogen substituted hexa- or tetra-hydrophthalic anhydrides.

Abstract: A process for the preparation of pentahaloethoxy benzoyl halide compounds comprisingA) chlorinating p-cresyl trifluoroacetate to form p-.alpha., .alpha.-dichloro-.beta.-,.beta.-,.beta.-trifluoroethoxy benzotrichloride;B) converting the p-.alpha., .alpha.-dichloro-.beta.-,.beta.-,.beta.-trifluoroethoxy benzotrichloride to p-pentafluoroethoxy benzoyl fluoride.

Abstract: Chlorinated phthalic anhydrides are converted to fluorinated phthalic acids without dilactone formation by reacting an anhydride with a primary amine under anhydrous conditions to form the corresponding chlorinated-N-substituted phthalimide which in turn is reacted with a fluorinating agent under anhydrous conditions to form the corresponding fluorinated phthalimide which is hydrolyzed to form the corresponding fluorinated phthalic acid.In a preferred embodiment tetrachlorophthalic anhydride is refluxed with aniline in the presence of glacial acetic acid for 5 to 10 hours to form tetrachloro-N-phenylphthalimide which is reacted with KF in sulfolane in the presence of tributylhexadecylophosphonium bromide under nitrogen at 140.degree. C. to 160.degree. C. for 10 to 15 hours to form tetrafluoro-N-phenylphthalimide which in turn is hydrolyzed by refluxing with 50% H.sub.2 SO.sub.4 for 15 to 25 hours. The tetrafluoro-N-phenylphthalimide is a novel compound.

Abstract: Oxydiphthalic anhydrides of the formula ##STR1## are prepared by reacting a halophthalic anhydride with potassium carbonate in:(1) a solvent-free reaction medium wherein the molar ratio of halophthalic anhydride:potassium carbonate is greater than 2:1; or(2) a high boiling solvent which improves the mixing of the components, and aids in subsequent purification of the product. The molar ratio of halophthalic anhydride to potassium carbonate is about 1.5:1 or greater.The oxydiphthalic anhydride can be purified by filtering or centrifuging a hot solution of the oxydiphthalic anhydride in a high boiling solvent to remove impurities, followed by cooling the solution to precipitate the oxydiphthalic anhydride, which can be removed from the solution by filtration or centrifuging.