Abstract: Improvements in ceramic wall and floor tile mortars are effected by incorporating therein at least one hydroxypropylhydroxyethylcellulose having specified substitution levels as a water retention aid or thickener.
Abstract: Disclosed is a pre-coat composition consisting essentially of (1) a low density polyethylene having a melt index of from about 70 to about 425; (2) a nitrogen-containing silane cross-linking compound, (3) a resin having a Ring and Ball softening point from about 50.degree. C. to about 115.degree. C.; (4) a hydrocarbon wax; and (5) optionally naphthenic oil. The composition is useful in the manufacture of tufted carpets.
Abstract: Non-asbestos elastomeric insulating materials for rocket motors are disclosed. The insulating materials are low in density (between about 0.035 and 0.050 lb./cubic inch) and comprise 100 parts by weight of a crosslinked elastomer polymer in which are dispersed between about 10 and 100 (preferably 15-75) parts by weight of a char forming organic fiber selected from polyaramide pulps and between about 5 and 75 parts by weight inorganic particulate. The insulating materials issue little smoke, have notable erosion resistance and can be tailored to have thermal, mechanical and other properties of desired character. Ingredients such as phenolics, flame retardants, and liquid polybutadiene can enhance the utility of the insulating materials in certain embodiments.
Abstract: Disclosed are novel wet strength resins for paper. The resins are produced by reacting an epihalohydrin, such as epichlorohydrin, with an aminopolyamide-polyureylene intermediate derived by reacting methylbisaminopropylamine with oxalic acid or a diester of oxalic acid and with urea.
Abstract: Disclosed are wet filament winding resins that are intimate admixtures consisting essentially of polybutadiene polymers whose functionality resides solely in unsaturation, an unsaturated monomer component, a peroxide free-radical initiator and optionally a block copolymer impact modifier. The resins have long pot lives and cure into low density resin matrices in composite structures. The resin matrices can have select mechanical properties of desired character through ingredient choice.
Abstract: Disclosed is an improved method of making a cellular crosslinked polymer with a metathesis-catalyst system where a metathesis-catalyst is activated with an alkylaluminum iodide compound.In a preferred embodiment, two parts of the metathesis-catalyst system form the basis for two solutions, a catalyst/monomer solution and an alkylaluminum iodide activator/monomer solution. At least one solution also contains a blowing agent. The solutions are combined in one place, such as the mixing head of a reaction injection molding machine, and then injected into another place, such as a mold, where the monomer reacts to form a cellular crosslinked polymer.
Abstract: A cellular thermoset polymer comprised of polymerized units of dicyclopentadiene monomer, wherein the cells of said cellular polymer are small and uniform.
Abstract: Water-dispersible, uniformly hydrophilic polyolefin fibers are prepared by treatment of an aqueous suspension of spurted polyolefin fibers with an aqueous solution of a water-soluble ionized reagent capable of being converted into hydrated solid particles submicron in size to form a dispersion of said fibers and then adding to the dispersion an ionic precipitant for the ionized reagent. Representative of the ionized reagent and the ionic precipitant are the sodium salt of hydrogenated rosin and papermakers' alum, respectively.
Abstract: A liquid-type low detonation-velocity explosive compositions having reduced shock energy with unhindered bubble energy, and a method for minimizing damage from explosive well stimulation procedure by use of such compositions.
Abstract: Disclosed are novel wet strength resins for paper. The resins are produced by reacting an epihalohydrin, such as epichlorohydrin, with a polyaminopolyamide derived by reacting methylbisaminopropylamine with oxalic acid or mixture containing oxalic acid and one or more different saturated dicarboxylic acids or their esters.
Abstract: Disclosed is a process for polymerizing beta-pinene to a substantially colorless, hard beta-pinene resin, and to the beta-pinene resin thus produced.
Abstract: An improved process of preparing hydroxy-terminated aliphatic polyethers having pendant alkyl azide groups is disclosed. The process entails reacting metal azide and hydroxy-terminated aliphatic polyether having pendant haloalkyl groups at elevated temperatures. The improvement comprises using a liquid reaction medium that is relatively non-polar and comprises a polyalkyleneoxide having (a) a molecular weight above about 200 and (b) miscibility with the hydroxy-terminated aliphatic polyether having pendant haloalkyl groups at temperatures greater than about 80.degree. C.
Abstract: A water-soluble carboxymethyl hydroxyethyl cellulose having a carboxymethyl degree of substitution of about 0.1 to about 0.25, preferably of about 0.15 to about 0.20, and having a hydroxyethyl molar substitution of greater than about 1.0 possesses unexpected qualities. When this composition is crosslinked with a suitable aluminum ion in an aqueous solution it forms a gel which exhibits no significant thinning at temperatures less than about 200.degree. F.
Abstract: Disclosed are transparent dentifrice compositions comprising a humectant, a vehicle for the humectant, a finely divided dental abrasive, a silica thickener, and a hydrophobically modified hydroxyethyl cellulose thickening and gelling agent.
Abstract: Incorporation of an ester plasticizer having a solubility parameter from about 7.8 to about 10.2 (cal/cc).sup.1/2 increases the flexibility and impact strength of poly(dicyclopentadiene). In a preferred embodiment of the method for poly(dicyclopentadiene) synthesis, the plasticizer is incorporated into at least one of two parts of a metathesis-catalyst system: a catalyst/monomer solution or an activator/monomer solution. The two parts are then combined in the mixing head of a reaction injection molding machine and injected into a mold where the reaction mixture rapidly sets up into a thermoset polymer with greater flexibility and impact strength than is found in the corresponding unplasticized poly(dicyclopentadiene).
Abstract: A blow molding machine for forming a chain of hollow, shaped article bodies of a normally highly crystalline thermoplastic material which is biaxially oriented, from a continuous tube of the material in substantially unoriented condition, but at its orientation temperature, which includes a tube and chain transporter for pulling the tube from a first point to a second point, and for pushing beyond the second point that portion of the chain formed between the two points; a tube brake to brake the travel of the tube past the first point during at least part of the time it is being pulled, whereby the part of the tube between the points becomes longitudinally stretched; and stationary blow molding means including a plurality of stationary blow molds between the first point and the second point, each having corresponding mold pieces closable on the stretched part of the tube, and openable after formation of the hollow body in the cavity defined by the closed mold pieces, and means for inflating the portion of the
Abstract: Disclosed are novel organic pigments adapted particularly for use as fillers for paper. The organic pigments are finely divided particles obtained by graft copolymerizing an ethylenically unsaturated monomer, such as styrene, onto a water-soluble cationic prepolymer in an aqueous solution and in the presence of a free-radical polymerization initiator.
Abstract: Halogen-containing polymers can be crosslinked by heat-curing with a crosslinking system made up of a crosslinking agent which is either a polymercaptan or an ester derivative thereof, a basic material and a hydrated salt. When the hydrated salt is chosen so that it releases its water of hydration during heat-curing the rate of crosslinking is enhanced.
Type:
Grant
Filed:
September 29, 1982
Date of Patent:
November 13, 1984
Assignee:
Hercules Incorporated
Inventors:
Dominic A. Berta, Vernon L. Kyllingstad
Abstract: Disclosed is the incorporation into a two-part metathesis-catalyst system of a halogen containing hydrocarbyl additive, where the hydrocarbyl additive contains at least one trihalogen substituted atom or at least one activated halogen atom. The use of this catalyst system to polymerize dicyclopentadiene results in a thermoset polymer containing low levels of residual monomer. Also disclosed is a preferred embodiment of dicyclopentadiene polymerization where the two parts of the metathesis-catalyst system, plus dicyclopentadiene are combined in the mixing head of a reaction injection molding machine and then injected into a mold where the dicyclopentadiene rapidly sets up into a thermoset polymer.
Abstract: A metallic chloride based creosote and soot removing composition including a phosphate corrosion inhibitor to reduce the corrosive attack on metal flue pipes is provided. The composition includes between about 15-60% metallic chloride, 20-60% trisodium phosphate dodecylhydrate, 15-60% anti-cake agents, such as non-swelling clay, sodium sulfate and tricalcium phosphate and 2-10% combustion initiator, such as wood flour.
Type:
Grant
Filed:
September 22, 1983
Date of Patent:
November 6, 1984
Assignee:
Hercules Chemical Company, Inc.
Inventors:
Leonard S. Mackowiak, Frank E. Ellison, Jay W. Fidler, N. George Tucker, Gangdhar M. N. Varma