Abstract: Polypropylene molding compositions of improved impact strength are obtained by subjecting certain block copolymers of ethylene and propylene to controlled oxidative degradation.

Abstract: An extraction resistant, smoke resistant linear polymeric phenolic antioxidant containing sulfonic acid groups or salts thereof in at least a portion of the recurring phenolic ring groups.

Abstract: A hindered phenolic antioxidant stablizer for polyolefins is rendered extraction resistant by complexing it with an agent containing complexing groups derived from N-vinyl-2-pyrrolidone or a N-dialkyl substituted amino alkyl ester of an .alpha.,.beta.-unsaturated carboxylic acid.

Abstract: A two-step process for the waste treatment of fluoroborate solutions which involves hydrolysis at an acidic pH in the presence of calcium ions toliberate fluoride and subsequent removal of fluoride values, e.g. by precipitation as calcium fluoride under alkaline conditions.

Abstract: A process is disclosed for the removal of colorants from industrial dye waste solutions which involves the treatment of the waste with a solution of a Group IA or IIA metal halide or sulfate to precipitate the colorant, which subsequently is removed by common solid separation techniques as a dense material of relatively high solids content. The process is particularly suitable for integration into a dyeing process to increase color fastness of the dyed article.

Abstract: A fluid flow meter of the variable area flow passage type is provided wherein the variation in said flow passage area is effected by the vertical displacement of a control boundary which is supported by a substantially horizontal annular diaphragm element. Said control boundary is shaped and sized so that the overall displacement required for the flow rate range desired is within the stroke capacity delivered by the total, up and down, free flexing action of said diaphragm element, thereby achieving substantially constant differential pressure operation at a very reasonable value which is due almost entirely to gravity. The resulting unit is very compact and stable and is characterized by very smooth linear response between vertical displacement and fluid flow rate. Said vertical displacement can be measured by various means but is preferably transduced to an equally linear, smooth and steady electrical signal by a direct connection with a specially adapted differential transformer.

Abstract: Novel injection molding fiberglass reinforced thermoplastic concentrate granules are prepared by a process wherein continuous multifilament glass strands are impregnated with from 10 to 30 percent by weight of thermoplastic resin and, while the strand is maintained under controlled temperature conditions, the impregnated strand is cut to lengths of at least 1/8 of an inch.

Abstract: In apparatus for polymerizing high-pressure ethylene to produce polyethylene, a tubular reactor is connected to a source of solution to the tubular reactor. This solution includes one or more catalysts which promote the polymerization reaction. Within the tubular reactor, a peak temperature occurs in proximity of the point at which the catalysts are introduced. If the catalysts are introduced at more than one point, peak temperatures will result downstream of each of such points. For various reasons, the peak temperatures are displaced along the tubular reactor and a plurality of thermocouples are distributed at spaced positions in the tubular reactor to measure the temperatures at the positions at which the peak temperature might occur. These thermocouples generate signals which are fed into a gating arrangement which selects the peak signal which is compared in a comparator circuit with an adjustable or selectable signal representative of the peak temperature which is desired.

Abstract: A two-step process for the waste treatment of fluoroborate solutions which involves hydrolysis at an acidic pH in the presence of calcium ions to liberate fluoride and subsequent removal of fluoride values, e.g. by precipitation as calcium fluoride under alkaline conditions.

Abstract: A filled polypropylene composition having excellent flame retardance is prepared by blending polypropylene resin with chlorinated paraffin hydrocarbon, chlorinated polyethylene, antimony oxide and alumina trihydrate.

Abstract: The catalyst stream used for regulating high pressure polymerization reactions of monoolefins such as ethylene can be supplied in a positive, clean and accurately controllable fashion by delivering it through a separate conduit which terminates in an orifice tip located within and substantially coplanar with the entry port of the monomer stream into the reaction zone. The subject technique simplifies start-up as well as maintenance of good temperature control throughout the polymerization process.

Abstract: A propylene polymer composition having excellent affinity towards basic dyestuffs is produced by blending a propylene polymer with an alternating copolymer of an alkyl vinyl ether and maleic anhydride, the alkyl group of the alkyl vinyl ether containing at least 8 carbon atoms.

Abstract: A fluid flow meter of the variable area flow passage type is provided wherein the variation in said flow passage area is effected by the displacement of a control boundary which is supported by an annular diaphragm element. Said control boundary is shaped and sized so that the overall displacement required for the flow rate range desired is within the stroke capacity delivered by the free flexing action of said diaphragm element, thereby achieving substantially constant differential pressure operation at a very reasonable value which is due almost entirely to gravity. The resulting unit is very compact and stable and is characterized by very smooth linear response between vertical displacement and fluid flow rate. Said vertical displacement can be measured by various means but is preferably transduced to an equally linear, smooth and steady electrical signal by a direct connection with a specially adapted differential transformer.

Abstract: Propylene, for example, is polymerized with crystalline TiCl.sub.3 --AlCl.sub.3 and diethylaluminum monochloride catalyst at a rate of at least 300 lbs. polymer/lb. catalyst/hr. based on TiCl.sub.3 with partial H.sub.2 pressure of about 150 to about 1000 psi and sufficient total pressure to maintain propylene in liquid form. The resulting propylene homopolymer, while still containing active catalyst residues, is then reacted further with at least one additional alpha-olefin, preferably ethylene or ethylene-containing alpha-olefin mixtures in suitable amounts. The resulting waxy block copolymer has a melt flow of 40 to 400 as determined by ASTM-D-1238-62T at 230.degree.C.

Abstract: Hydroxy-terminated polymers of butadiene having two hydroxy groups per molecule are prepared by polymerizing butadiene in a chain transfer solvent at a temperature of from about 50.degree. to about 170.degree.C. with t-butyl beta-hydroxyethyl peroxide as an initiator.

Abstract: ABS compositions of improved impact strength are obtained by adding thereto controlled amounts of a synthetic hydrocarbon resin having a ring and ball softening point of at least 70.degree.C and derived from deeply cracked petroleum stocks.

Abstract: An aqueous acid nickel electroplating bath containing as a brightener-leveling agent the reaction product of an acetylenic diester of a halogenated saturated aliphatic acid with a heterocyclic compound containing a tertiary nitrogen atom. The brightener may have the general formula ##EQU1## wherein R.sub.1 and R.sub.2 are hydrogen, halogen or a hydroxy, carboxy, carboxyester, sulphoxy, alkyl, amino or amido group;R.sub.3 is a hydrogen or an alkyl group;R.sub.4 and R.sub.5 are hydrogen or an alkyl group;X is halogen andN is an integer from 0 to 2.

Abstract: Propylene-based, normally solid polymer compositions are stabilized against oxidative degradation especially when exposed to both a metal such as copper and a soft hydrocarbon medium such as petrolatum. Highly synergistic levels of stability are achieved by combining in said polymer compositions three different stabilizer additives (a), (b) and (c) as follows:A. between about 0.4 and about 1.6% by weight of the tetraester of pentaerythritol with 3(3',5'-ditertiary butyl, 4'-hydroxy phenyl) propionic acid,B. between about 0.1 and about 0.4% by weight of N,N'" diacetyl N',N" adipoyl dihydrazide, andC. between about 0.15 and about 0.

Abstract: A process is provided for the degradation of propylene polymers comprising contacting a propylene polymer exhibiting a first melt flow rate with oxygen or an oxygen-containing gas and an organic or inorganic peroxide; melting and working and resulting mixture in a high shear zone thereby degrading said propylene polymer; and recovering an essentially odor free propylene polymer exhibiting a second melt flow rate higher than said first melt flow rate.