Abstract: Flame retarding resin compositions having good thermal stability and good impact resistance. The composition comprises a thermoplastic resin selected from the group of polycarbonate, polybutylene terephthalate, polyethylene terephthalate, and blends and alloys of polycarbonate with polybutylene terephthalate, polyethylene terephthalate and acrylonitrile-butadiene-styrene, and a flame retarding amount of a melt-blendable, solid polybrominated triphenyl phosphate ester selected from tris(dibromophenyl)phoshate and bis(tribromophenyl)phenylphosphate, and less than 5% antimony oxide or halogenated organic.

Abstract: It was unexpectedly found that a brominated phosphate ester, tris(2,4-dibromophenyl)phosphate when employed in flame retardant quantities in a modified polyphenylene oxide resin resulted in discoloration of the resin on aging. Neither phosphate esters, flame retardants nor brominated flame retardants when employed separately as flame retardants caused similar discoloration. The use of epoxy compounds counteracted this color stability problem.

Abstract: Certain applications require a CRT display to be well shielded against emitting RF electromagnetic energy. A shield placed at the neck portion of a CRT envelope inhibits RF emissions from being transmitted through the face portion of the CRT. The shield comprises longitudinal conductors for suppressing transverse magnetic (TM.sub.01, TM.sub.02 . . . ) mode emissions and circular conductors for suppressing transverse electric (TE.sub.01, TE.sub.02 . . . ) mode emissions. Placing the shield at the rear of the CRT envelope eliminates the need for covering the face portion of the CRT with an optically transparent screen. To eliminate RF emissions from the CRT display the housing is provided with a contiguous RF emission shield that is connected to the shield on the neck of the CRT. Alternatively, an internal RF emission shield would enclose the video circuitry which includes all potential sources of undesired RF emission.

Abstract: A liquid composition is provided suitable for use as a flame retardant additive for polyurethane foams. The composition overcomes the problems of high viscosity and precipitates forming in formulations of phosphate esters and polybromodiphenyl oxides and avoids scorch and smoldering while preparing polyurethane foams meeting the California 117 standard. In addition, the composition provides an unexpected advantage of improved efficacy and heat stability. The process for preparing the flame retarded polyurethane foam and the foam itself are also claimed.

Abstract: A polycarbonate polymer composition rendered flame retardant by having combined these with an effective amount of a phosphorus-containing polyester polymer which is the polycondensation product of a glycol, phthalate and a phosphine oxide of the formula: ##STR1## wherein R.sub.1, may be the same or different radicals selected from the group consisting of hydrogen and methyl radicals and R.sub.2 is a radical of 2 to 8 carbon atoms.

Abstract: Polybromotriphenyl phosphates provide excellent flame retardancy for styrene modified polyphenylene ether molding resins, and provide flame retardant composition thereof which exhibit desirable processing characteristics, excellent impact strength, high heat distortion temperature, and minimal tendency toward stress cracking.

Abstract: A bicyclic phosphine oxide composition comprising the grouping ##STR1## wherein P is phosphorus, O is oxygen, A is an alkylene chain of 2 to 12 carbon atoms, Z is a polar group and R represents the carbon atoms in a phosphorus-containing ring formed by alkylating phosphine with an ethylenically unsaturated alicyclic hydrocarbon having a pendant olefin group.

Abstract: A phosphine oxide composition represented by the formula: ##STR1## wherein P is phosphorus, O is oxygen, A is an alkylene chain of 2 to 12 carbon atoms, Z is a polar group, n is 1 or 2, and R is an ethylenically unsaturated alicyclic hydrocarbon or alcohol.

Abstract: A polyurethane elastomer product formed by curing a mixture of an NCO terminated urethane prepolymer and a polyhydroxyalkylphosphine oxide. The polyhydroxyalkyl phosphine curative is a compound of the class having the formula: ##STR1## wherein R is alkylene of 3 to 6 carbon atoms, R.sub.1 is alkyl of 2 to 10 carbon atoms, cycloalkyl of 6 to 12 carbon atoms and n is an integer of 2 to 3. Exemplary polyhydroxyalkyl phosphine curatives are (HOCH.sub.2 CH.sub.2 CH.sub.2).sub.2 P(O)--C.sub.4 H.sub.9 --sec. and (HOCH.sub.2 CH.sub.2 CH.sub.2).sub.3 P(O).

Abstract: Cyclic phosphine oxides of the formula: ##STR1## wherein P is phosphorus, O is oxygen, A is an alkylene chain of 2 to 12 carbon atoms, Z is a polar group and R represents the carbon atoms in a phosphorus-containing ring formed by alkylating an ethylenically unsaturated cyclic hydrocarbon with phosphine.The cyclic phosphine oxides are useful as flame retardants for styrene modified polyphenylene ether resins.

Abstract: A heat curable polyurethane composition comprising a blocked NCO prepolymer and a hydroxyl curative containing a polyhydroxyalkylphosphine oxide.

Abstract: A curable polyurethane composition, which gives improved adhesives on curing, comprises an NCO urethane prepolymer and, as the curative therefor, a mixture of an aliphatic hydroxy compound and a polyhydroxyalkylphosphine oxide.

Abstract: Epoxy resins are rendered fire retardant by the addition thereto of a 3-hydroxyalkylphosphine oxide. Other halogen containing flame retardants may or may not be present in the composition. Mixtures containing a brominated epoxide and/or a halogenated phosphine oxide provide a high level of flame retardance at low levels of the additive. The epoxy resins may be heat cured in the presence of an acid anhydride or amine to form a polymer having the phosphine oxide incorporated in the polymer molecule.

Abstract: Epoxy resins are rendered fire retardant by the addition thereto of a 3-hydroxyalkylphosphine oxide. Other halogen containing flame retardants may or may not be present in the composition. Mixtures containing a brominated epoxide and/or a halogenated phosphine oxide provide a high level of flame retardance at low levels of the additive. The epoxy resins may be heat cured in the presence of an acid anhydride or amine to form a polymer having the phosphine oxide incorporated in the polymer molecule.

Abstract: Epoxy resins are rendered fire retardant by the addition thereto of a 3-hydroxyalkylphosphine oxide. Other halogen containing flame retardants may or may not be present in the composition. Mixtures containing a brominated epoxide and/or a halogenated phosphine oxide provide a high level of flame retardance at low levels of the additive. The epoxy resins may be heat cured in the presence of an acid anhydride or amine to form a polymer having the phosphine oxide incorporated in the polymer molecule.

Abstract: Flame-retardant compositions having an excellent balance of properties are obtained by flame-retarding rubber-modified polystyrenes with a mixture of about 55-95% by weight of a first flame retardant corresponding to the formula: ##STR1## AND ABOUT 45-5% BY WEIGHT OF A SECOND FLAME RETARDANT CORRESPONDING TO THE FORMULA: ##STR2## wherein X is bromo or chloro, Y is halo, hydrogen, or an alkyl, haloalkyl, alkoxy, or haloalkoxy group, and Z is a tetravalent hydrocarbon group containing 4-20 carbon atoms.

Abstract: A sterilizable bag for use in the production of mushroom spawn has at least a panel of microporous plastics sheet material, for example microporous polypropylene or polyethylene, which is a good bacterial filter. In use the bag is filled with a particulate nutrient material, sterilized, inoculated with mycelium, and then stored under incubation conditions for growth of the mycelium through the nutrient material.

Abstract: The invention provides a method and apparatus for the hydration and/or cooking of a particulate material, for example grain which is to be used as a nutrient medium for mycelium growth in the production of mushroom spawn, or food products such as peas, beans, rice, diced root vegetables or meat cut into small pieces.The material is heat treated under pressure with water in liquid or vapour phase, then flash cooled and sterilized. Throughout these operations the material is agitated and the treated sterile material is fed into sterile containers under aseptic conditions.

Abstract: Fibrinolytic pharmaceutical compositions are provided in unit dosage form and comprise a water-soluble complex of a proteolytic enzyme linked covalently to a polymeric substance.

Abstract: This is an invention in a method for locating the azimuthal direction of fractures induced into an underground formation adjacent to a well bore. Practicing the method of the invention involves measurement of stresses created at or near ground surface by such fracture propagation, utilizing pressure sensitive devices making up stress meters which reflect those stress changes on standard pressure gauges. Such stress meters are preferably each placed at an optimum distance from a well bore and spaced therearound, and, when a fracture is induced in the formation around the well bore, preferably by hydraulic means, said stress meters measure surface stress changes as horizontal pressure changes, which pressure change measurements can then be used to mathematically determine the direction of the fracture.