Abstract: A polymer having aromatic or heterocyclic rings as the only structural elements said aromatic or heterocyclic rings containing at least two nitro groups is disclosed as well as a method of preparing the same. The polymers are useful as binding agents for thermo stable propellants and can be easily formed into films. They remain thermally stable up to temperatures of at least 200.degree. C.

Abstract: An aqueous solution of a mixture of silicon-organic compounds comprising:A. A silane of the general formula: ##STR1## wherein a is 1 or 2, b is 0, 1 or 2, and a +b is equal to or less than 3, p is 0 or 1, and R represents an alkylene moiety of 1 to 8 carbon atoms or arylene moiety, R' represents an alkyl moiety, X represents a hydrolizable moiety and Y represents a functional group or the CH.sub.3 or the CH.sub.2 .dbd.CH moiety, andB. A copolymer having the recurrent unit of the general formula: ##STR2## wherein R" represents OH and/or [O].sup.- [NH.sub.4 ].sup.+ and/or [0].sup.- [Me].sup.+ where Me is an alkali or alkaline earth metal and Z can represent a moiety of the formula: ##STR3## wherein R'" represents an alkyl moiety. Also disclosed are new copolymers having the recurrent unit ##STR4## wherein at least one of the Z moieties is a moiety having the formula ##STR5## wherein R'" represents an alkyl moiety.

Abstract: A process for the production of foam materials, particularly polyolefin foam materials, from crosslinked polyolefin scraps involves comminuting and compressing crosslinked polyolefin foam scraps at a temperature lying below the decomposition temperature of a crosslinked agent contained therein, plasticating the resulting comminuted product also at a temperature lying below the temperature of the crosslinked agent, forming a shaped article from the plasticated material and thereafter crosslinking and expanding the shaped article by heating above the decomposition temperature of the crosslinking agent and of a blowing agent contained within said material. The initial foam scraps are obtained during the formation of a crosslinked polyolefin foam containing material.

Abstract: Aryl sulfonic acid esters of the formula ##STR1## wherein R.sup.1 represents hydrogen, alkyl groups of 1 to 8 carbon atoms, bromine or chlorine, R.sup.2 represents R.sup.1 or the group ##STR2## Hal represents bromine or chlorine, x the numbers 2 to 4, n the numbers 3 to 5, y the numbers 4-x; m=5-n, R.sup.3 represents bromine, chlorine or the group ##STR3## and Z represents --O--, --S--, ##STR4## alkylene with 1 to 4 carbon atoms, or alkylidene; a process for their product and their use as a flame retardant, especially for polyolefins.

Abstract: A process for preventing separation of fillers and other dispersed additives from thermoplastic molding compositions during extrusion, calendering or like processing, along metallic contact surfaces of a processing unit, involves admixing a silane additive to a portion of a thermoplastic molding composition containing a thermoplastic molding resin and at least one filler or other dispersed additive that tends to separate out from the molding composition during the processing, processing the portion of thermoplastic molding composition in a processing unit, measuring the electrical energy applied to the processing unit during processing per kilogram of molding composition per unit time, determining if the electrical energy applied has been increased by the addition of the silane additive as compared to the electrical energy required per kilogram of molding composition per unit time for processing another portion of the thermoplastic molding composition free of the silane additive and thereafter adding an effec

Abstract: Method of preparing granular quartz glass which comprises heating a porous granulated silica gel having an alkoxy group content equal to or less than 1 weight percent and a total impurity content of less than 1 part per million, the porous granulated silica gel obtained by hydrolysis of an orthosilicic acid ester of an aliphatic alcohol at a temperature up to 1400.degree. C.

Abstract: A process for the preparation of a terephthalic, isophthalic or phthalic dialdehyde is described by dehydrogenation of the corresponding xylylene glycol in the vapor phase at 250.degree. to 500.degree. C. The process is carried out in the presence of oxygen, water vapor and a dehydrogenation catalyst, suitably a silver dehydrogenation catalyst.

Abstract: A protective covering for the protection of surface seals against mechanical damage in building constructions and other civil engineering constructions which comprises a composite of an elastic, waterproof thermoplastic synthetic resin film sheet and/or synthetic resin layer and a lattice-like fabric having knot couplings or points of intersection of the threads that yield under the effect of a load.

Abstract: A process for the recovery of cobalt from residues and/or wastes containing the same by converting the cobalt to cobalt oxide. Disclosed herein is a process for recovering cobalt values from cobalt-containing residues by heating the cobalt in the presence of air to form cobalt oxide which can be separated readily from water-soluble salts which may be present therewith.

Abstract: A process for preparing a gamma amino propyl alkoxy silane of the formula ##STR1## wherein R is an alkyl moiety of 1 to 4 carbon atoms, R' is methyl or phenyl, and y is 0, 1 or 2 which comprises contacting the corresponding gamma-chloropropyl alkoxy silane with ammonia under pressure at a temperature between 50.degree. and 90.degree. C. while stirring the reaction mixture.

Abstract: An improved process for the production of an aminoalkylsilane by reaction of a chloroalkylsilane with ammonia or alkylamine at an elevated temperature or pressure wherein the chloroalkylsilane is added in a less than stoichiometric ratio to the ammonia or alkylamine preheated in a pressure vessel at a temperature between 50.degree. and 200.degree. C. Thereafter the reaction is carried out in a known manner within the temperature range of 50.degree. to 200.degree. C. By this manipulative technique, a higher yield of aminoalkylsilane is obtained per unit of time and the aminoalkylsilane is obtained in a greater purity.

Abstract: A method for the preparation of a compound of the formula ##STR1## or salt thereof bearing one or more .alpha.-hydroxymethylene groups, wherein the univalent moiety R is hydrogen, a straight chain or branched alkyl group of 1 to 20 carbon atoms, a straight chain or branched moiety of the formula--(CH.sub.2).sub.n --COOR.sup.1, OR.sup.1, CF.sub.3,wherein n is from 0 to 5, a straight chain or branched moiety of the formula ##STR2## wherein each R.sup.1 independently represents an alkyl radical of 1 to 12 carbon atoms, or a univalent phenol moiety and n has the meaning above, a substituted or unsubstituted moiety of the formula ##STR3## wherein R.sup.2 is hydrogen, an alkyl group of 1 to 6 carbon atoms, a --(CH.sub.2).sub.n --COOR.sup.1, chlorine, bromine, --OR.sup.1, CF.sub.3, --(CH.sub.2).sub.n --CN, where n and R.sup.1 have the meanings given above, a ring system of the heterocyclic or isocyclic, monocyclic or polycyclic structure which comprises contacting a nitrile of the formulaR--CH.sub.

Abstract: An improvement in a process for the esterification of a organochlorosilane by feeding alcohol into a chlorosilane maintained within a reaction zone without said alcohol contacting said chlorosilane in the gas phase wherein the esterification is performed stepwise with extraction of hydrogen chloride which has developed, the improvement which comprises employing in at least a final esterification step an organochlorosilane of the formulaH.sub.a R.sub.b SiCl.sub.4-a-bwhereinR represents an optionally halogen-substituted alkyl radical which can also contain an oxygen or sulfur atom in the chain, or a halogen or a NO.sub.2 group or a protected phenolic group containing aryl radical,a equals 0, 1, or 2,b equals 1 or 2, anda+b amounts to a maximum of 3,said final esterification step being performed with the addition of heat.

Abstract: An improvement in a process for forming an orthosilicic acid ester or an oligomer thereof by contacting a tetrachlorosilane or higher homolog thereof with a primary alcohol, the improvement which comprises introducing the alcohol directly into a tetrachlorosilane liquid phase without said alcohol touching the gas phase and, after completion of the reaction, removing hydrogen chloride formed during the reaction from the reaction zone.

Abstract: An improved process for the preparation of alkylsilanes and/or alkylsilanes substituted at the alkyl group by an addition reaction in the presence of a platinum or palladium supported catalyst wherein the reaction mixture is heated to its boiling point, condensed and the condensate contacts the catalyst, the improvement residing in vaporizing the reaction mixture and maintaining the vapors in out of contact relationship with respect to the platinum or palladium supported catalyst and contacting the reaction mixture only after it has condensed with the platinum or palladium supported catalyst and recovering the condensed reaction product.

Abstract: An improvement in the preparation of orthosilicic acid tetraalkyl esters by reaction of metallic silicon with alcohol in the presence of alkali alcoholate is disclosed, the improvement residing in carrying out the reaction in the co-presence of an ether alcohol or alkanolamine as cocatalyst.

Abstract: A heat stabilized polyvinylidene fluoride composition comprising polyvinylidene fluoride and a stabilizing amount of a phosphinate.

Abstract: A process for coating an inorganic silicatic substrate is described wherein the substrate is contacted with a copolymer of vinylacetate and a vinylalkoxysilane followed by water removal.

Abstract: A method has been invented for the preparation of phthalide which comprises chlorinating o-toluic acid at 30.degree.-260.degree. C. and recovering the phthalide obtained.

Abstract: Glycidyloxypropylalkoxysilanes are produced by thermal treatment of novel siliceous dioxolane derivatives of the formula: ##STR1## wherein a is 0 or 1 and R represents an oxygen radical or two hydrogen atoms and R' and R" each represents an alkyl radical, wherein the R" 's can be the same or different. The glycidyl products are useful as adhesives.