Abstract: Concentrated aqueous solutions of ferric chloride, directly useful as flocculating agents in a variety of water treatments, are prepared by (a) digesting iron with a dilute aqueous solution of hydrochloric acid until such acid has essentially been consumed and thereby producing an aqueous solution of ferrous chloride; (b) reacting chlorine with such aqueous solution of ferrous chloride, in the presence of a recycled aqueous solution of ferric chloride; (c) decompressing the step (b) reaction product solution to vaporize water therefrom, thereby concentrating same; and (d) recycling a fraction of the decompressed liquid phase to step (b) and recovering remaining fraction as final product aqueous solution of ferric chloride.

Abstract: The process for the preparation of dicyclopentenyloxyethanol having the formula ##STR1## by reaction of dicyclopentadiene with ethyleneglycol in the presence of a catalyst consisting of an acid cation exchange resin, characterized in that it consists in mixing the dicyclopentadiene and the ethyleneglycol in a mixing tank to obtain a mixture, and bringing the mixture in contact with the catalyst in a cartridge separate from the mixing tank.

Abstract: A polyamide-based tube for transporting a gasoline having resistance to permeability therethrough of the gasoline consisting essentially of an outer polyamide layer and an inner polyvinylidene fluoride layer bonded together by an adhesion binder.

Abstract: (Meth)acrylic/glutarimide copolymers, well suited, e.g., for optical applications, having enhanced glass transition temperatures (Tg), are prepared by salifying the acid functions of (meth)acrylic ester/(meth)acrylic acid copolymers, and then imidifying such "intermediate" salified copolymers into the subject (meth)acrylic/glutarimide polymers.

Abstract: Aesthetically pleasing multicolored composite articles comprise a support substrate, e.g., a metal or alloy thereof, coated with a multicolored face surface coating composition including at least one crosslinked hydroxylated polymer, such at least one crosslinked hydroxylated polymer having dispersed therein a multicolored powder of at least one solid thermoplastic resin, e.g., a polyamide or polyetheramide, and, optionally, with at least one colored interlayer deposited between the support substrate and such multicolored face surface coating composition.

Abstract: An amphoteric starch containing carboxyl and cationic groups characterized in that its carboxyl groups originate from the selective oxidation of the hemiacetal groups of the cationic starch and possibly of the hemiacetal groups of its products of acid hydrolysis. The process for producing the amphoteric starch consists in reacting a cationic starch in aqueous solution with hydrogen peroxide and hydrobromic acid or bromine, so as to oxidize selectively the hemiacetal groups of the cationic starch and, where appropriate, the hemiacetal groups of its products of acid hydrolysis, to give carboxyl groups.

Abstract: Transparent polyamide compositions having high resistance to chemical agents, as well as the process for their preparation and the articles obtained from said compositions. The present polyamide compositions contain from 1 to 99% by weight, preferably 40 to 90% by weight, of a first polyamide consisting of aliphatic units containing at least 7 carbon atoms, isophthalic and terephthalic diacids, the latter being predominant, and cycloaliphatic diamine units, and from 99 to 1% by weight, preferably 60 to 10%, of a semi-crystalline polyamide consisting of at least 35%, preferably 50%, by weight of an aliphatic unit containing at least 7 carbon atoms.

Abstract: Methods for the treatment of pediculosis are disclosed comprising applying a pediculicidally effective amount of at least one metal salt or ester of undecylenic acid in combination with a pharmaceutically acceptable topical carrier therefor.

Abstract: The invention relates to a catalyst formed of an active charcoal support in the form of particles or of cylinders having a diameter from 0.3 to 1.5 mm and a length of 0.3 to 5 mm or spheres having a diameter from 0.3 to 2 mm, the said particles being loaded with a precious metal from group 8. Advantageously, palladium on active charcoal is used.The invention is particularly useful for purifying monochloroacetic acid.

Abstract: These acrylic and methacrylic compounds are chosen from those of the formula: ##STR1## in which R.sup.1 is H or CH.sub.3 ; A is (CH.sub.2).sub.n or n is an integer from 2 to 12 or --(CH.sub.2 CH.sub.2 O).sub.d --CH.sub.2 CH.sub.2 --, d is an integer from 1 to 20; X is S or O; Y is S or O, under the condition that X is S and Y is O when A is --(CH.sub.2 CH.sub.2 O).sub.d --CH.sub.2 CH.sub.2 --; R is C.sub.1 --C.sub.20 alkyl or --(CH.sub.2).sub.p SR.sup.3 where p is an integer from 3 to 12 and R.sup.3 is C.sub.1 -C.sub.20 -alkyl; m is an integer from 1 to 3; and Z is H, R.sup.2 QH, or R.sup.2 is C.sub.2 -C.sub.12 -alkyl and Q is O or S, and the atoms of the metals from Groups IA, IIA, IIIA, IB, IIB, VIB, VIIB and VIII of the Periodic Table, on condition that Z is H or R.sup.2 OH when m is 1 and m is the valence of Z when Z is a metal.

Abstract: Particulates of a superabsorbent partially, neutralized acrylic polymer, e.g., polyacrylic acid, having a mean particle size ranging from 100 to 500 .mu.m, essentially monodisperse and essentially devoid of fines having a particle size of less than 100 .mu.m, having a nonuniformly surfaced spheroidal particle morphology and well suited for a variety of hygienic applications, are prepared by (i) polymerizing a suspension of an acrylic monomer charge I in an organic medium and producing a suspension of acrylic polymer gel particles, such acrylic monomer charge I having a degree of neutralization greater than that desired in the final superabsorbent polymer, (ii) next absorbing a second acrylic monomer charge II into the gel particles, such acrylic monomer charge II having a degree of neutralization less than that desired in the final superabsorbent polymer, and (iii) polymerizing in the gel particles the second acrylic monomer charge II.

Abstract: Thermoplastic powder coating compositions including a polyamide and/or polyetheresteramide constituent and an epoxy/sulfonamide resin constituent are well adapted for coating a wide variety of metal substrates, e.g., by electrostatic spraying, without the requirement for first treating such substrates with an adhesion primer.

Abstract: Hindered amine light stabilizers are provided in which the hindered amine is contained in a unit of formula ##STR1## where X is ##STR2## and R.sup.1, R.sup.2, R.sup.3, and A are as defined as in the Summary of the Invention. Unique polymeric and non-polymeric compounds containing this unit are useful as additives for the stabilization of polymeric compositions which are normally subject to thermal, oxidative or actinic light degradation.

Abstract: Particulates of a superabsorbent polymer, e.g., an acrylic polymer such as polyacrylic acid, well suited for a variety of hygienic applications, are prepared by (i) suspending an aqueous solution of a water-soluble monomer charge I in a hydrocarbon medium by means of a polymerizable surfactant having the general formula:R.sub.1 --O--(CH.sub.2 --CH.sub.2 --O).sub.n --R.sub.2wherein R.sub.1 is a hydrocarbon having at least 9 carbon atoms, R.sub.2 is an acryloyl, methacryloyl or maleoyl radical, and the degree of condensation n in respect of the ethylene oxide ranges from 30 to 70, (ii) polymerizing the suspension thus formed, producing a suspension of polymer gel particles and converting the surfactant to effectively remove same from the medium of polymerization, (iii) next absorbing a second monomer charge II into such gel particles, and (iv) polymerizing in the gel particles the second monomer charge II.

Abstract: A process for producing a novel catalyst wherein an amorphous alumina gel is formed at least on the surface of an aluminum-containing material, the gel is heated to form crystalline .alpha.- or .beta.-alumina trihydrate and the trihydrate is sulfided, the product of said process, and the method of producing mercaptans from alcohols or ethers and hydrogen sulfide at elevated temperature in the presence of said novel catalyst, are disclosed herein.

Abstract: A settable copolymer containing the copolymerization remnants of a fluoridated monomer and an allylic derivative characterized in that:a) The remnants of the fluoridated monomer are derived from the association of tetrafluoroethylene and vinylidene fluoride.b) The allylic derivative has the formula: ##STR1## with R representing a linear, branched, or cyclic alkyl chain, not saturated, and having 2 to 12 carbon atoms.R1, R2, R3, and R4, may be identical or different, being chosen from among: H, CH.sub.3, CH.sub.2 --CH.sub.3, OH, CH.sub.2 OHn is 0 or 1p is a value from 0 to 3.This settable copolymer is obtained by copolymerization in solution in an organic solvent. This copolymer is used in powdered paints.

Abstract: The use of VDF/TFE/HFP terpolymers in PVDF based powder coating resins to enhance the aesthetics of coatings made therefrom.

Abstract: Aqueous paint stripper formulations containing a solvent system comprised of an ester such as benzyl formate and methods for using the same to strip paint.

Abstract: A method is disclosed for the selective preparation of 3-aminomethyl-3,5,5-trialkylcyclohexylamine by preparing dried 3-cyano-3,5,5-trialkylcyclohexylimine from the reaction of 3-cyano-3,5,5-trialkylcyclohexanone with ammonia in the presence of a drying agent in an amount at least sufficient to retain the water present or generated during the imine-forming reaction, and hydrogenating the dried 3-cyano-3,5,5-trialkylcyclohexylimine in the presence of a cobalt-containing catalyst at elevated temperature and pressure.

Abstract: Chloroacetic acids and essentially pure hydrochloric acid are prepared by chlorinating acetic acid in the presence of a catalytically effective amount of acetic anhydride, acetyl chloride, or admixture thereof, whereby byproducing a gaseous stream of crude hydrochloric acid, contacting such gaseous stream with active charcoal to remove the chlorine values therefrom, separating (i) pure hydrochloric acid and (ii) remaining products from the gaseous stream thus purified, and recycling such remaining products (ii) to the medium of chlorination.