Abstract: A method of coupling a latex having a surface carboxylic amide group to a protein by an amide bond for producing a composition useful in immunological testing for antibodies or antigen.

Abstract: A polyurethane is disclosed which can be used in particular for the production of articles intended to be in contact with blood, characterized in containing a macromolecular chain comprising nitrogen atoms in the form of quaternary ammonium groups, to which molecules of heparin are bonded, these nitrogen atoms originating from polymers consisting of q recurring units of the formula:--A--NH--CO--O--B--O--CO--NH-- (I)and t recurring units of the formula:--A--NH--CO--Z--NH-- (II),these units of the formula (I) and (II) being bonded to one another, and the various symbols of these units having the following meanings:A is a divalent organic radical consisting of a straight-chain or branched-chain alkylene radical containing from 3 to 10 carbon atoms, or a cycloalkylene radical having 5 or 6 carbon atoms in the ring or a phenylene radical which is optionally substituted by 1, 2 or 3 lower alkyl radicals (with at most 4 carbon atoms), or two alkylene or phenylene radicals linked to one another by a divalent hydrocar

Abstract: A polyester composition having high fireproofness is obtained by blending a copolymerized polyester comprising a polyalkylene terephthalate containing in the main chain thereof binding units of the formula: ##STR1## (WHEREIN, Y denotes -O-, an alkylidene radical having 1 to 6 carbon atoms or a cycloalkylidene radical having 3 to 6 carbon atoms) with a high molecular weight organic phosphorus compound of the formula: ##STR2## (WHEREIN, R.sub.1 denotes a monovalent hydrocarbon radical of 1 to 18 carbon atoms having or not having one or more substituents, R.sub.2 denotes a divalent hydrocarbon radical of 2 to 20 carbon atoms having or not having one or more substituents, x and z each denote 0 or 1 and n denotes an integer having the value of not less than 3) in an amount corresponding to 0.05 to 1.0% by weight of phosphorus atoms.

Abstract: Absorbent polymeric compositions are prepared by graft polymerizing acrylonitrile onto flour or other starch-containing substrates and then subjecting the flour-polyacrylonitrile graft copolymers to alkaline saponification. Compositions prepared from gelatinized flour absorb from 1800-3000 times their weight of deionized water.

Abstract: This invention relates to a process for the production of a thermoplastic synthetic material of chemically modified protein, which comprises mixing an aqueous alkaline protein solution with an aqueous solution of a tetrafunctional, doubly unsaturated, organic compound of the general formula ##STR1## in which R.sub.1 is hydrogen or an alkyl group with 1 to 18 carbon atoms,R.sub.2 is hydrogen or an alkyl group with 1 to 6 carbon atoms, andR.sub.3 is hydrogen or an alkyl group with 1 to 3 carbon atoms,Subjecting the mixture to a dwell time, causing a precipitating liquid to act upon it, freeing the formed precipitate from excess liquid, and drying. The invention also relates to a shaping material of plastic material of chemically modified protein and a chemical plasticizer. The invention also relates to a plastic material of modified protein.

Abstract: A method of linking a protein to a carboxylated latex by an amide bond which comprises the steps of forming an active ester latex, dialyzing the active ester latex, and coupling the latex to a protein such as an antibody or an antigen.

Abstract: Bark-extended tannin-aldehyde resinous adhesives are formed in situ as adhesives for wood products, such as plywood. Bark, in a finely divided particle form, is treated with alkali and then used as an extender by admixing the bark particles with tannin and an aldehyde co-reactant therefor. The admixture is combined as a bonding agent for the wood members to be adhered, and is formed in situ into an adhesive by subjecting the wood members to temperature and pressure conditions effective to form a bark-tannin-aldehyde resin.

Abstract: A flame-retardant filament-forming copolyester resin of at least 75 mol % of ethylene-2,6-naphthalene dicarboxylate units and at least 5 mol % up to 25 mol % of alkylene-2,5-dibromoterephthalate units is disclosed herein. In addition, fibers of the above flame-retardant copolyester resin and flame-retardant cellulosic fibers are blended together to provide flame-retardant yarns and fabrics of excellent physical properties.

Abstract: A novel resin composition is obtained by blending a hydrophilic pullulan with 2 to 98 wt %, based on the total resin weight, of a hydrophobic thermoplastic resin.In case the amount of the thermoplastic resin is 2 to 50 wt %, there is obtained a resin composition consisting essentially of the pullulan which is excellent in water resistance, while in case the amount of the thermoplastic resin is 50 to 98 wt %, there is obtained a resin composition consisting essentially of the thermoplastic resin which has been improved in water and moisture absorptivity.

Abstract: Thermosetting phenol-formaldehyde resins having novel structures and properties are described. In one embodiment, there is provided a novel thermosetting phenol-formaldehyde resin having benzyl ether linkages ortho to the phenolic hydroxyl group and characterized by its infra-red spectrum which exhibits absorption at wave numbers of about 1010 cm.sup.-1, 1060 cm.sup.-1 and 1230 cm.sup.-1. The infra-red spectrum has a particular ratio of absorbance at 1010 cm.sup.-1, measured from a base line drawn between wave numbers of 1030 cm.sup.-1 and 950 cm.sup.-1, to that at 1230 cm.sup.-1, measured from a base line drawn between wave numbers of 1130 cm.sup.-1 and 1310 cm.sup.-1 which is less than about 0.1. These novel resins are prepared by the controlled addition of strong acids to thermosetting phenol-formaldehyde resins having the benzyl ether linkages and an infra-red spectrum exhibiting large adsorption at wave numbers of 1230 cm.sup.-1, 1060 cm.sup.-1 and 1010 cm.sup.

Abstract: The recovery of a polymer product formed by condensing an organo-phosphonic acid dichloride or dibromide, a dihydroxy aromatic compound and, optionally, a crosslinking momomer in an organic solvent reaction medium, as a granular solid is accomplished by combining said organic solvent containing the polymer product and an aqueous solution which contains an effective amount of suspending agent to later induce precipitation of said polymer product and by thereafter agitating the solution while removing the solvent therefrom to affect precipitation of said granular polymer product.

Abstract: A material containing from 0.1 to 10 parts of polyethylene or ethylene vinyl acetate copolymer per 1 part of natural cork is provided as a substitute for natural cork in stoppers for liquid food or wine bottles.

Abstract: Monosaccharides and disaccharides in which one or more of the hydroxy groups has been replaced by a p-vinylbenzoyloxy group are provided as new compounds. These may be copolymerized with such monomers as styrene or methyl methacrylate to provide novel copolymers.

Abstract: There is disclosed a class of asbestos-free, surface coating compositions useful for finishing of interior building walls or ceilings constructed with wallboard and the like, the so called dry wall construction. The compositions contain, as a substitute for the commonly employed asbestos fibers, a synthetic fiber which is a water-dispersible, thermoplastic polyolefin prepared by solution polymerization with a coordination catalyst and precipitated from the solution under high shear forces. The synthetic fibers can be surface modified by treatment with hydrophilic colloids such as starch or polyvinyl acetate or can bear carboxyl or sulfonate groups to improve their water dispersibility. The fibers are commercially available under the designation SWP from the Crown Zellerbach Company, Camas, Washington.

Abstract: Aqueous phenolic resole dispersions are disclosed. The dispersions are produced in the presence of certain hydroxyalkylated gums, such as hydroxyalkylated guar gum, as interfacial agents.

Abstract: Cellulosic substrates, e.g. wood, textiles or paper, have increased fire resistance when treated with an aqueous solution of a polyalkylenepolyamine (e.g. polyethylenimine) and a mixture of mono- and diammonium phosphate.

Abstract: A novel thermosetting phenol-formaldehyde resin having a preponderance of benzyl ether linkages is characterized by its infra-red spectrum which exhibits absorption at wave numbers of about 1010 cm.sup.-.sup.1, 1050 cm.sup.-.sup.1 and 1230 cm.sup.-.sup.1. The infrared spectrum has a particular ratio of absorbance at 1010 cm.sup.-.sup.1, measured from a base line drawn between wave members of 1030 cm.sup.-.sup.1 and 950 cm.sup.-.sup.1, to that at 1230 cm.sup.-.sup.1, measured from a base line drawn between wave numbers of 1130 cm.sup.-.sup.1 and 1310 cm.sup.-.sup.1 which is less than about 0.1. These novel resins are prepared by the controlled addition of strong acids to thermosetting phenol-formaldehyde resins having a preponderance of benzyl ether linkages and an infrared spectrum exhibiting large adsorption at wave numbers of 1230 cm.sup.-.sup.1, 1050 cm.sup.-.sup.1 and 1010 cm.sup.-.sup.1, causing a decrease of at least 35% in the ratio of absorbance at 1010 cm.sup.-.sup.

Abstract: An assemblage of fibers is provided which exhibits highly satisfactory flame retardant characteristics in spite of the fact that discrete fibers are included within the admixture which would normally burn when exposed to flame. Included in intimate physical admixture with the fibers which would normally undergo combustion are discrete additive fibers consisting primarily of a chlorinated and/or brominated aromatic polymer having the inherent ability to render the admixture as a whole non-burning when subjected to the flame. Particularly preferred additive fibers are formed primarily of an aromatic polyester formed from the reaction of tetrabromobisphenol A, isophthalic acid, and terephthalic acid or the esterforming derivatives thereof. Also, in a particularly preferred embodiment a minor concentration of an oxide of antimony (e.g. antimony trioxide or antimony pentoxide) is intimately dispersed throughout the additive fibers.

Abstract: This disclosure relates to a waterproof and weather-resistant adhesive composition for use in the manufacture of corrugated board and its preparation. More specifically, it concerns the preparation of a water-resistant paperboard adhesive containing a resin and a primary, secondary or tertiary amine compound of the formula: ##STR1## wherein R.sub.1, R.sub.2, R.sub.3, and R.sub.4 are the same or different and are hydrogen, alkyl groups of 1 to 3 carbon atoms, or hydroxyalkyl groups of 1 to 3 carbon atoms. This improved starch base adhesive has superior viscosity stability, improved gel temperature, and excellent pot life stability compared to an adhesive made without aminohydroxy compound.

Abstract: A method for modifying the physical characteristics of cellulose materials by the impregnation of the cellulose fibers with acidic solutions of monomer and oligomeric silicic acid to form a capillary cellulose-polysilicic acid structure to which selective binder materials may be adhered.