A new form of .gamma.-- calcium pyrophosphate having a rhambohedral crystal shape and regular particle size, more especially in the range 8-81/2 microns, is prepared by controlled heating of anhydrous calcium hydrogen phosphate having a similar crystal form and particle size. The latter phosphate is prepared by precipitation of brushite and dehydration in an aqueous medium such as aqueous phosphoric acid at an elevated temperature. When the new pyrophosphate is employed as a source of calcium an...

Supple, microporous, breathable elastomeric films with a system of intercommunicating cells are described. The films which optionally contain inert organic or inorganic particles varying in size from about 0.02 microns to 150 microns are prepared by deposition from a solution spread on a suitable surface. Deposition is effected by exposure of the solution to a liquid which is miscible with the solvent but which does not dissolve the elastomer. The use of the film in the preparation of leather re...

A strip of material for the production of clothing, particularly for the duction of doll's dresses, comprises a blank defined by cutting lines and seam areas directly on the material, the seam areas having adhesive thereon for securing the seams together.

A method of cleaving ketones at a carbon-carbon bond adjacent to the ketonic carbon to produce a terminal carboxylic ester and a terminal oxime group, which comprises, nitrosating the ketone in the presence of a polar aprotic solvent and an alcohol. The products are useful intermediates, particularly as intermediates in the production of polyamides, and as solvents. A method of synthesizing .epsilon.-caprolactam from the intermediate .omega.-hydroximino hexanoate, produced by cleaving cyclohexan...

The present invention relates to the removal of hydrocarbon residues from a catalyst and more specifically the air activation of a catalyst containing hydrocarbon residues. It also relates to extruded pipe and utility conduit resins comprising polyethylene, household/industrial chemicals container resins, and to a polyethylene resin particularly suitable for large parts by blow molding and sheet extrusion procedures, wherein the resin is made by a process using an activated chromium and titanium...

A thiophene compound represented by formula (I): ##STR00001## in which:A represents a C2 C5 alkylene bridge; R represents a stereoselectively substituted, linear or branched C2 C24 alkyl, C3 C18 cycloalkyl, C1 C18 alkoxy or polyethyleneoxide group, optionally substituted with at least one substituent selected from the group consisting of an alcohol, amide, ether, ester or sulfonate group; or an optionally substituted aryl group having at least one chiral center substituted at said C2 C5 alkylene...

Sulfonated polyoxadiazole polymers containing groups selected from: ##STR00001##

Branched nitropolyphenylene resins are disclosed which have a substantial degree of branching. Also disclosed is a polyphenylene resin mixture comprising branched nitropolyphenylenes and branched soluble polyphenylenes. This resin mixture is used to prepare asbestos, glass, carbon and graphite fiber composites.

The present invention relates to various nano-composites and compositions comprising a cationic mediator and method thereof. The cationic mediator comprises a polymeric group and a cationic unit selected from the group consisting of onium cation and heterocyclic cation. The nano-composites and compositions exhibit improved gas permeability property, strong moisture absorbance, and high electrical conductivity etc.

A composition for roller for an electronic copying machine or printer which comprises a vinyl polymer (A) having at least one alkenyl group per molecule, and a roller as fabricated using said composition for roller. The present invention provides a composition for roller for an electronic copying machine or printer with which an alcohol-soluble nylon layer can be directly constructed on the roller without a primer or other pretreatment.