Hoechst Aktiengesellschaft

Ruhrchemie Aktiengesellschaft

Joachim Wortmann

Franz-Josef Dany

Joachim Kandler

Peter Munch

Hartfrid Vollmer

Gunther Braun

Horst Staendeke

Ursus Thummler

Rudolf Kern

Joseph Cremer

Hedwig Prell

Karl Maier

Tomas Riedel

Gerhard Rieb

Hans Peter Beu

Burkhard Schonrogge

A process inhibiting the coalescence of flowable phosphorus pentachloride in a closed container. To this end, the invention provides for a readily volatizable organic liquid boiling within the range about 20.degree. to 200.degree. C. and being inert with respect to phosphorus pentachloride to be admitted to the container prior to, during or after the introduction of phosphorus pentachloride thereinto, and for the container to be then hermetically sealed, the liquid being used in a proportion of about 1 to 15 weight %, based on the quantity of phosphorus pentachloride.

Process inhibiting the coalescence of flowable phosphorus pentachloride

The invention provides stabilized pulverulent red phosphorus comprising a homogeneous blend of red phosphorus particles with a size of at most about 2 mm, aluminum hydroxide and a further metal hydroxide as oxidation stabilizers, wherein the metal hydroxide is lead hydroxide. The homogeneous blend contains aluminum hydroxide and lead hydroxide in a total proportion of about 0.1 to 6 weight %, based on the quantity of red phosphorus, the aluminum hydroxide and lead hydroxide, calculated as Al.sub.2 O.sub.3 to PbO, being used in a quantitative ratio of about 0.5 to 2.0.

Stabilized red phosphorus

Self-extinguishing laminates are made by an improved process, wherein individual layers of a carrier material are impregnated with a thermosetting phenolic resin containing a flame-retardant agent and the impregnated layers are placed one above another and bonded together by compressing them at elevated temperature and under elevated pressure to give a hardened laminate. More specifically, finely pulverulent phosphorus pentanitride as a flame-retarding agent is dispersed in the plasticized or non-plasticized thermosetting phenolic resin, with or without a diluent; the phenolic resin, based on its solid matter content, and the phosphorus pentanitride being used in an approximate ratio by weight of 100:4 to 100:15; and the phenolic resin, based on its solid matter content, and the carrier being used in an approximate ratio by weight of 100:80 to 100:150.

Process for making self-extinguishing laminates

Intumescent flame-retardant coating composition consisting substantially of a film-forming agent, an ammonium polyphosphate, one or more substances which are carbonizable under the action of heat, a dispersant, and optionally a filler. The coating composition additionally contains an ammonium polyphosphate activator weighing 0.5 to 50% of the weight of ammonium polyphosphate. The activator is constituted by at least one salt which contains water of crystallization which is liberated upon the composition being heated to about 35.degree. C.

Intumescent flame-retardant coating compositions

A process for flameproofing plastics comprising incorporating in the plastic a homogeneous granulate containing pulverulent red phosphorus with a particle size of up to about 100 microns and a binder; the granulate is more particularly comprised of a blend of

Process for flameproofing plastics

Antistatic properties are imparted to rubber by admixing it with conductive carbon black, vulcanizing the resulting blend and forming the rubber. More specifically, the rubber is admixed with about 5 to 40 weight % of conductive carbon black which has an AS-number of 15 to 35, a specific electric resistance of 10.sup.-1 up to 10.sup.-3 ohms .times. cm under a moulding pressure of 100 to 180 atmospheres absolute, a bulk density of 100 to 180 g/liter, a BET-surface area of 100 to 1000 m.sup.2 /g. The carbon black is made by a process wherein an aqueous suspension of carbon black with an AS-number higher than 15 and prepared by subjecting hydrocarbons, which are liquid at room temperature, to thermal conversion at 1200.degree. to 2000.degree. C, under pressures within the range 1 and 80 atmospheres absolute, and in the presence of oxygen or an oxygen-containing gas, and water scrubbing the resulting carbon-black-containing reaction gas, is intimately blended at 5.degree. to 120.degree. C, under pressures of 1 to 20 atmospheres absolute, in liquid phase at a pH-value of 7 to 10, and for 1 to 20 minutes, with vaporizable liquid aliphatic or cycloaliphatic hydrocarbons, the carbon black is separated from liquid matter, then heated and thereby freed from hydrocarbons and water, and finally annealed for 20 to 30 minutes at 200.degree. C up to 2200.degree. C.

Process for imparting antistatic properties to rubber

Production of flameproof polyurethanes or polyurethane foams containing an ammonium polyphosphate of the general formula:

Flameproof polyurethanes

Production of agents reducing the flammability of polyurethane moulding compositions. The agents are more particularly comprised of compounds of the following general formula (I) ##STR1## in which R stands for an alkylene radical having from 2 to 6 carbon atoms, which may be halogen-substituted, if desired, a --CH.sub.2 --CH.sub.2 --O--CH.sub.2 --CH.sub.2 -- radical, a phenylene radical or an alkyl- or halogenoalkyl-substituted diphenylene methane radical, R.sub.1 and R.sub.2, respectively, stand for a hydrogen atom, an alkyl radical or a halogen-substituted alkyl radical having from 1 to 4 carbon atoms, x + y stand for a number between 0.1 and 3, and n stands for 1 or 2.

Diphosphates

Flame-retardant PVC-plasticizers of the general formula (I) ##STR1## in which R stands for an alkylene radical or a halogen-substituted alkylene radical having from 2 to 6 carbon atoms, a --CH.sub.2 CH.sub.2 --O--CH.sub.2 CH.sub.2 -- radical, a phenylene or an alkyl or halogenoalkyl-substituted diphenylenemethane radical and R.sub.1 stands for a branched or unbranched alkyl radical having from 6 to 18 carbon atoms.

Flame-retardant plasticizers for polyvinyl chloride

Halogen-containing phosphoric acid polyesters of the general formula (I) ##STR1## IN WHICH R stands for an alkylene radical or a halogen-substituted alkylene radical having from 2 to 6 carbon atoms, a --CH.sub.2 CH.sub.2 --O--CH.sub.2 CH.sub.2 -- radical, a phenylene or an alkyl or halogenoalkyl-substituted diphenylenemethane radical, and R.sub.1 stands for a branched or unbranched alkyl radical having from 6 to 18 carbon atoms.

Halogen-containing phosphoric acid polyesters

Production of intumescent flame-retardant coating compositions which substantially contain a film-forming binder, an ammonium polyphosphate, one or more substances carbonizing under the action of heat, dispersing agents and fillers, if desired. The compositions contain more particularly an ammonium polyphosphate of the general formula:

Production of agents reducing the flammability of polyurethane moulding compositions. The agents are more particularly comprised of compounds of the following general formula (I) ##STR1## IN WHICH R stands for an alkylene radical having from 2 to 6 carbon atoms, which may be halogen-substituted, if desired, a --CH.sub.2 --CH.sub.2 --O--CH.sub.2 --CH.sub.2 -- radical, a phenylene radical or an alkyl- or halogenoalkyl-substituted diphenylene methane radical, R.sub.1 and R.sub.2, respectively, stand for a hydrogen atom, an alkyl radical or a halogen-substituted alkyl radical having from 1 to 4 carbon atoms, x + y stand for a number between 0.1 and 3, and n stands for 1 or 2.

Reducing flammability of polyurethane foams with phosphorus compounds

Production of polyols containing halogen and phosphorus. The polyols are more particularly comprised of compounds the following general formula (I) ##EQU1## in which R stands for an alkylene radical having from 2 to 6 carbon atoms, which may be halogen-substituted, if desired, a --CH.sub.2 --CH.sub.2 --O--CH.sub.2 --CH.sub.2 -- radical, a phenylene radical or an alkyl- or halogenoalkyl-substituted diphenylene methane radical, R.sub.1 and R.sub.2, respectively stand for a hydrogen atom, an alkyl radical or a halogen-substituted alkyl radical having from 1 to 4 carbon atoms, x + y stand for a number between 0.1 and 3, and n stands for 1 or 2. The polyols find use as flameproofing agents in plastics, particularly in polyurethane foams.

Process for making polyols containing halogen and phosphorus

Desensitized free-flowing red phosphorus. The phosphorus is comprised of a homogeneous blend consisting of between about 80 and 98 weight% of red phosphorus having a particle size of up to about 2 mm, and of between about 2 and 20 weight% of an organic or organo-silicon compound desensitizer. The desensitizer is liquid, inactive with respect to red phosphorus and has a minor vapor pressure at room temperature at atmospheric pressure.

Desensitized free-flowing red phosphorus

Flameproof moulding compositions, which are based on polyolefins and made from a pulverulent blend comprising a polyolefin as its essential ingredient and a plurality of flame-retardant ingredients. The flame-retardant ingredients comprise red phosphorus and at least one organic nitrogen compound which carbonizes after inflammation. The moulding compositions contain the flame-retardant ingredients in a total proportion of at most about 30 weight %. Red phosphorus and organic nitrogen compound are used in a quantitative ratio between 99:1 and 1:99.

Growing community of inventors

Turnich, Germany

Joachim Wortmann