Abstract: Reactor wall coatings for polymerization reactors and processes for forming such coatings are disclosed. The reactor wall coatings can have a thickness of at least 100 ?m and a molecular weight distribution including a major peak having one or more of an Mw/Mn ratio of less than 10; an Mz/Mw ratio of less than 7; and a maximum value of d(wt %)/d(log MW) at less than 25,000 daltons in a plot of d(wt %)/d(log MW), where MW is the molecular weight in daltons. The reactor wall coatings can be formed in-situ during polymerization, on reactor walls initially free of a reactor wall coating, or having a pre-existing reactor wall coating.

Abstract: The present invention provides a polymer blend suitable for use as a film or a coating, the polymer blend including from 1 to 99% by weight of a metallocene-produced VLDPE polymer having a density less than 0.916 g/cm3, and from 1 to 99% by weight of an LDPE polymer having a density of from 0.916 to 0.928 g/cm3 wherein the sum of (a) and (b) is 100%. The VLDPE polymer can have a melt index of from 6 to 15 dg/min, or from 9 to 12 dg/min.

Abstract: A process/apparatus is disclosed for continuously separating a liquid medium comprising diluent and unreacted monomers from a polymerization effluent comprising diluent, unreacted monomers and polymer solids, comprising a continuous discharge of the polymerization effluent from a slurry reactor through a discharge valve and transfer conduit into a first intermediate pressure flash tank with a conical bottom defined by substantially straight sides inclined at an angle to that of horizontal equal to or greater than the angle of slide of the slurry/polymer solids and an exit seal chamber of such diameter (d) and length (l) as to maintain a desired volume of concentrated polymer solids/slurry in the exit seal chamber such as to form a pressure seal while continuously discharging a plug flow of concentrated polymer solids/slurry bottom product of the first flash tank from the exit seal chamber through a seal chamber exit reducer with inclined sides defined by substantially straight sides inclined at an angle to th

Abstract: A mechanism for transporting a hub is provided. Particularly, a transport mechanism for a pelletizer knife hub is disclosed. The mechanism comprises a clamp for selectively engaging and releasing the shaft of the pelletizer knife hub. The clamp is connected to a support bar. The support bar, in turn, has a hoisting connector for being raised, lowered, and maneuvered by a hoisting system. According to the mechanisms of the present invention, the clamp is rotatable relative to the hoisting system. In one embodiment, a counter-balance to the hub is provided. In another arrangement, the hoisting system supports the hub above the hub for balancing the system.

Abstract: Tubular reactor apparatus and processes are provided for improved polymerization including using chain transfer agents and multiple monomer feeds spaced lengthwise along the tubular reactor providing high conversions of monomer into polymer. The invention also relates to polymers made from such a tubular reactor apparatus and processes including those polymers having a low haze value, a density over 0.92 g/cm3 and/or having terminal carbonyl groups. The apparatus and methods uncouple or reduce the dependency between the monomer concentration and transfer agent concentration. The uncoupling in other embodiments may also be varied leading to multiple desirable effects.

Abstract: A clear cosmetic gel composition comprising: (a) an aqueous phase comprising: (i) water, and (ii) at least one cosmetically active ingredient; (b) a coupling agent; (c) an oil phase comprising: (i) a silicone-containing solvent, and (ii) an isoparaffin solvent having a boiling range between about 100 to 340° C., wherein the isoparaffin constitutes between about 1 to 75% by weight, of the total of the oil phase; and (d) silicone-containing surfactant.

Abstract: A thermosetting plastic foam solid formed from the reaction product of: (a) either polyisocyanate or isocyanate-based foam; (b) a polyol-based foam; (c) a catalyst which is capable of promoting the thermosetting reaction between the polyisocyanate or isocyanate-based foam and the polyol-based foam; and (d) a blowing agent which comprises a high purity cyclopentane product, wherein the high purity cyclopentane product is about 95% or greater pure cyclopentane, and, optionally, (e) water and/or (f) liquid flame retardant.

Abstract: A clear cosmetic gel composition comprising: (a) an aqueous phase comprising: (i) water, and (ii) at least one cosmetically active ingredient; (b) a coupling agent; (c) an oil phase comprising: (i) a silicone-containing solvent, and (ii) an isoparaffin solvent having a boiling range between about 100 to 340° C., wherein the isoparaffin constitutes between about 1 to 75% by weight, of the total of the oil phase; and (d) silicone-containing surfactant.

Abstract: The invention provides for a purified glycidyl ester product prepared from neo acids wherein said ester product is recovered as a light fraction from a glycidyl ester reaction product composition that has been subjected to conditions of temperature and vacuum in a thin film, short pass distillation evaporator, said purified glycidyl ester product further characterized that its polymerizable reaction product with methacrylic acid has a higher effective glass transition temperature as compared with the polymerizable reaction product with methacrylic acid of said glycidyl ester reaction product composition prior to purification.

Abstract: A process plant for the manufacture of halobutyl rubber is provided with online monitoring and control of the process parameters to control the properties of the product. It incorporates an in-situ measurement system that does not require the removal of any sample material from the process. It uses a Fourier Transform Near Infrared (FTNIR) spectrometer, fiber-optic cables, a viscometer for measuring solution viscosity and a Resistance Temperature Device (RTD) for temperature measurement. An online real-time analyzer system using a Constrained Principal Spectral Analysis program predicts the property of the polymer product and provides the process control system with analysis of the data using derived relationships between the physical properties of the polymer and these spectral measurements and the measured values of fluid viscosity and temperature. Differences between the predicted and desired property of the product are used to control process parameters.

Abstract: Blends of at least two polyethylenes are described for extrusion coatings, blown films and cast films. The gloss exhibited by such coatings or films is surprisingly higher than the gloss of the individual components.

Abstract: A molecular sieve comprising a core having deposited thereon a surface layer, wherein the surface layer has a higher Si:Al ratio than that of the core, provides for lower branching in olefin oligomerization products.

Abstract: A thermosetting plastic foam solid formed from the reaction product of: (a) either polyisocyanate or isocyanate-based foam; (b) a polyol-based foam; (c) a catalyst which is capable of promoting the thermosetting reaction between the polyisocyanate or isocyanate-based foam and the polyol-based foam; and (d) a blowing agent which comprises a high purity cyclopentane product, wherein the high purity cyclopentane product is about 95% or greater pure cyclopentane, and, optionally, (e) water and/or (f) liquid flame retardant.

Abstract: The invention relates to novel compositions comprising thermoplastic elastomers and microporous inorganic fillers, and novel continuous, non-porous films formed therefrom which are impermeable to blood and preferably have enhanced moisture vapor transmission rates (MVTR).

Abstract: A method for producing a cyclopentane product which comprises the following steps: (a) cracking dicyclopentadiene to form a cyclopentadiene-rich stream and a higher boiling liquids stream; (b) separating the cyclopentadiene-rich stream from the higher boiling liquids stream; (c) diluting the cyclopentadiene-rich stream with recycled saturates such that the cyclopentadiene content is limited to between about 5-50%; (d) conducting a first hydrogenation of the cyclopentadiene-rich stream in the presence of hydrogen and a first catalyst, and at a temperature (i.e., preferably between about 26 to 94.degree. C., more preferably in the range between about 37 to 66.degree. C.

Abstract: Cellulose esters according to formula (I):?(C.sub.6 H.sub.7 O.sub.2)(OR).sub.x (OR').sub.y (OH).sub.3-x-y !.sub.n (I)are described, where R is hydrophobic, R' is hydrophilic and not phthalyl or trimellityl, which may be designed, by the proper selection of R, R', x, y, and n, to dissolve under mild to alkaline conditions, and not before. A coating comprising a modified ester according to formula (I) may be used for controlled-release applications, particularly for a cleaning formulation.

Abstract: In the process of hydrogenating a crude aldehyde product formed from the oxo process into a crude alcohol product, which process includes: feeding the crude aldehyde product into a first reactor which contains a hydrogenation catalyst, thereby forming a first hydrogenated product; feeding the first hydrogenated product from the first reactor through at least one intermediate reactor, each intermediate reactor being connected in series and containing a hydrogenation catalyst, thereby forming at least one intermediate hydrogenated product; and feeding the intermediate hydrogenated product from a last intermediate reactor to a final reactor which contains a hydrogenation catalyst, thereby forming the crude alcohol product; the improvement including a step wherein: at least a portion of the first hydrogenated product is recycled to the first hydrogenation reactor; or at least a portion of the intermediate hydrogenated product is recycled to the first hydrogenation reactor or an intermediate reactor upstream of th

Abstract: A process for recovering phthalic anhydride and maleic anhydride from a maleic anhydride-rich vapor phase oxidation product comprising the step of: contacting the vapor phase oxidation product with: (i) at least one by-product stream having a freezing point which is lower than the freezing point of pure phthalic anhydride; and/or (ii) a solvent having a boiling point in the range between about 150.degree. to 350.degree. C. and a freezing point of less than 40.degree. C.; wherein a vapor-to-liquid weight ratio in the range between about 2 to 20 is exhibited within the contacting means, thereby forming a liquid phase phthalic anhydride product having a phthalic anhydride concentration in the range between about 50-100 wt. % and a first vapor stream.

Abstract: This invention relates to an aerosol hair spray formulation containing 0.5 to 15 weight percent of a water-dispersible or water-dissipatible, linear sulfopolyester having a Tg of 40.degree. C. to 50.degree. C. and an inherent viscosity of 0.24 to 0.60 dl/g which contains repeat units from 20 to 26 mole percent dimethyl-5-sodiosulfoisophthalate and 74 to 80 mole percent isophthalic acid, based on 100 mole percent dicarboxylic acid; 10 to 30 mole percent 1,4-cyclohexanedimethanol and 70 to 90 mole percent diethylene glycol, based on 100 mole percent diol; and up to 60 weight percent of an alcohol. The aerosol hair spray formulations are clear, have improved dry time and curl retention, and exhibit less than 20 NTU's, which is a measure of turbidity, even at high concentrations of alcohol.

Abstract: Disclosed is a process for the purification of a naphthalenedicarboxylic acid (NDA) which has been manufactured by the oxidation of a dialkylnaphthalene in the presence of a molecular oxygen-containing gas and a heavy metal-containing catalyst and contains metal residues, e.g., cobalt and manganese residues, as impurities. The process involves contacting an acetic acid slurry of a NDA, typically 2,6-naphthalenedicarboxylic acid, containing such metals, with acetic anhydride.