Patents by Inventor Horst Staendeke
Horst Staendeke has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 5985965Abstract: The flame-resistant polyurethanes of the invention comprise, as flameproofing agents, mixtures of oligomeric phosphoric acid esters which carry hydroxyalkoxy groups, of the formula I ##STR1## in which q denotes an average chain length of 0.5 to 10, R.sub.1 is a hydroxyl-containing radical of the formula II a,R.sub.2 is a radical of the formula III ##STR2## R.sub.3 is a radical of the formula II b, R.sub.4 is R.sub.1 or R.sub.3 ; R.sub.5,R.sub.6 and R.sub.7 are an H atom or an alkyl radical having 1 to 6 carbon atoms, m is 0 to 4 and n is 1 to 4.Type: GrantFiled: February 11, 1997Date of Patent: November 16, 1999Assignee: Clariant GmbHInventors: Martin Sicken, Horst Staendeke
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Patent number: 5852197Abstract: The invention relates to cyclic diphosphoric esters of the formula ##STR1## with R=methylethylene, 1,3-cyclohexylene, 1,4-cyclo-hexylene or 1,3-phenylene, a process for their preparation and their use as flame retardants.Type: GrantFiled: July 15, 1996Date of Patent: December 22, 1998Assignee: Hoechst AktiengellschaftInventor: Horst Staendeke
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Patent number: 5776992Abstract: The invention relates to a halogen-free, flame retardant rigid polyurethane foam based on polyether-polyols and polyisocyanates, which comprises, as the polyol component, mixtures of nitrogen-free and nitrogen-containing polyether-polyols and, as the flameproofing agent, ammonium polyphosphate.Type: GrantFiled: August 11, 1997Date of Patent: July 7, 1998Assignee: Hoechst AktiengesellschaftInventors: Siegfried Jung, Horst Staendeke
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Patent number: 5750601Abstract: The invention relates to flame retardant polymeric compositions which comprise a halogen-free cyclic phosphoric acid ester of the formula (I) ##STR1## where R=phenyl or methyl substituted phenyl as a flameproofing agent.Type: GrantFiled: December 4, 1996Date of Patent: May 12, 1998Assignee: Hoechst AktiengesellschaftInventor: Horst Staendeke
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Patent number: 5719200Abstract: The flame-resistant polyurea foam of the invention contains calcium sulfate dihydrate as filler and ammonium polyphosphate as flame retardant. Its bulk density is from 25 to 250 kg/m.sup.3 and the number of open cells is above 80% of all its cells. The polyurea has been formed from a reaction of prepolymers of diphenylmethane 4,4'-diisocyanate with water.The polyurea foam of the invention can be used as a block foam or on-site foam for sound and/or heat insulation.Type: GrantFiled: July 1, 1996Date of Patent: February 17, 1998Assignee: Hoechst AktiengesellschaftInventors: Horst Staendeke, Reinhold Lagoda
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Patent number: 5484830Abstract: Halogen-free, flame-resistant polymeric compositions contain an intumescence flameproofing system which comprises ammonium polyphosphate and an organophosphorus nitrogen component. The organophosphorus nitrogen component here is a phosphoric acid polyester according to the formula ##STR1## In these formulae, R is CH.sub.2, C.sub.2 H.sub.4 or C.sub.3 H.sub.6, while m is 1 to 10 and n is 1 to 6.Type: GrantFiled: January 26, 1994Date of Patent: January 16, 1996Assignee: Hoechst AktiengesellschaftInventor: Horst Staendeke
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Patent number: 5391698Abstract: The invention relates to phosphoric acid polyesters according to the formulae ##STR1## in which R is .dbd.CH.sub.2, .dbd.C.sub.2 H.sub.4 or .dbd.C.sub.3 H.sub.6 and m is 1 to 10 and n is 1 to 6.To prepare these phosphoric acid polyesters, the cyclic phosphoric acid ester 2,4,8,10-tetraoxa-3,9-dioxo-3,9-dihydroxy-phosphaspiro[5.5]-undecane is reacted with tris-hydroxyalkyl cyanurate or tris-hydroxyalkyl isocyanurate at temperatures of 120.degree. to 250.degree. C. in the presence of a catalyst for 2 to 12 hours, while mixing intensively.Type: GrantFiled: January 25, 1994Date of Patent: February 21, 1995Assignee: Hoechst AktiengessellschaftInventor: Horst Staendeke
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Patent number: 5312853Abstract: Flame-retardant polymeric compositions, preferably thermoplastic and especially polyolefin-based compositions, containing an intumescent flame-retardant system substantially comprised of a phosphorus component and an organic nitrogen component. The flame-retardant system is more particularly comprised of ammonium polyphosphate and tris-(2-hydroxyethyl) isocyanurate.Type: GrantFiled: September 23, 1993Date of Patent: May 17, 1994Assignee: Hoechst Celanese CorporationInventors: Horst Staendeke, Daniel J. Scharf
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Patent number: 5093199Abstract: In a stabilized, pulverulent red phosphorus comprising phosphorus particles having a maximum particle size of 2 mm whose surface is covered with a thin layer of an oxidation stabilizer, the oxidation stabilizer is composed of tin oxide hydrate.Type: GrantFiled: December 29, 1989Date of Patent: March 3, 1992Assignee: Hoechst AktiengesellschaftInventors: Horst Staendeke, Ursus Thummler
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Patent number: 4985221Abstract: Phlegmatized, pulverulent red phosphorus with good free-flowing properties comprises 95 to 99.95% by weight of red phosphorus having a particle size of up to 2 mm, and 0.05 to 5% by weight of polyurethane as phlegmatization agent.This red phosphorus is prepared by introducing an aqueous polyurethane dispersion into an aqueous suspension of red phosphorus having a particle size of up to 2 mm, after a pH of from 5 to 9 has been set, in a manner such that 5 to 0.05 parts by weight of polyurethane are present per 95 to 99.95 parts by weight of red phosphorus, then stirring the mixture at a temperature of from 20 to 90.degree. C. for 0.5 to 3 hours, and finally drying the phlegmatized red phosphorus at elevated temperature after filtration.Type: GrantFiled: February 2, 1990Date of Patent: January 15, 1991Assignee: Hoechst AktiengesellschaftInventors: Horst Staendeke, Ursus Themmler
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Patent number: 4957950Abstract: Flame-retardant polymer compositions contain a flame-retardant system consisting of a phosphorus/nitrogen-component, aluminum hydroxide, and a least one synergetically active component selected from the group consisting of organic nitrogen compounds, polyalcohols or derivatives thereof, the phosphorus/nitrogen-component being ammonium polyphosphate, if desired.Type: GrantFiled: September 9, 1988Date of Patent: September 18, 1990Assignee: Hoechst AktiengesellschaftInventors: Horst Staendeke, Daniel Scharf
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Patent number: 4894469Abstract: Halogenated phosphonophosphoric acid esters of the general formula ##STR1## in which X stands for a halogenR' stands for an alkylene having from 1 to 4 carbon atomsA stands for ##STR2## R'" stands for identical or different alkyl groups having from 1 to 4 carbon atoms, a halogen or hydrogen, and R.sup.IV stands for a halogen or hydrogen, are made. To this end, phosphorus (III) chloride is reacted in a first step with an alkylene oxide in the presence of a catalyst; the resulting reaction product consisting substantially of phosphorous acid trialkylesters is freed from alkylene oxide in excess and reacted in a second step with a suitable halogenoacyl halide in a molar ratio of 2:1-1.5; the resulting phosphonophosphoric acid ester is repeatedly scrubbed with water and/or an aqueous solution of ammonia and then either separated or halogenated in a third step under ultraviolet light, repeatedly scrubbed with water and/or an aqueous ammonia solution, and separated.Type: GrantFiled: December 4, 1987Date of Patent: January 16, 1990Assignee: Hoechst AktiengesellschaftInventors: Horst Staendeke, Werner Krause
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Patent number: 4853288Abstract: Stabilized pulverulent red phosphorus consisting substantially of particles with a size of at most 2 mm, encapsulated in a thin layer of an oxidation stabilizer consisting of at least one scarcely water-soluble or water-insoluble metal hydroxide and a melamine/formaldehyde-polycondensation product.Type: GrantFiled: March 10, 1988Date of Patent: August 1, 1989Assignee: Hoechst AktiengesellschaftInventors: Horst Staendeke, Ursus Thummler, Wilhelm Adam
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Patent number: 4853424Abstract: Flame-retardant polymer compositions containing a flame-retardant system consisting of a phosphorus/nitrogen-component and aluminum hydroxide.Type: GrantFiled: August 12, 1988Date of Patent: August 1, 1989Assignee: Hoechst AktiengesellschaftInventors: Horst Staendeke, Daniel Scharf
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Patent number: 4772642Abstract: Self-extinguishing polymeric composition based on a polyolefin, especially polypropylene, of improved thermal stability containing an intumescent fire-retardant system comprised of a phosphorus constituent and a carbonaceous nitrogen constituent. The composition contains more particularly, as the phosphorus constituent, a product consisting substantially of(a) 75-99.5 wgt % pulverulent free flowing ammonium polyphosphate of the following general formulaH.sub.(n-m)+2 (NH.sub.4).sub.m P.sub.n O.sub.3n+1in which n stands for an integer having an average value of from about 20 to 800 and the ratio of m/n is about 1, and(b) about 0.5-25 wgt % of a water-insoluble, optionally cured artificial resin encapsulating the individual ammonium polyphosphate particles.Type: GrantFiled: April 16, 1987Date of Patent: September 20, 1988Assignee: Hoechst AktiengesellschaftInventor: Horst Staendeke
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Patent number: 4701373Abstract: The disclosure relates to difficulty flammable wooden articles, especially chip boards comprising solid and pipe boards, prepared by extrusion from wooden chips and/or woody fibrous materials. The articles contain as a flame-retarding addend a product of(a) 50 to 99.5 weight % of a flame-retarding agent physically and chemically stable under extrusion conditions, preferably 75 to 99.5 weight % of a pulverulent, free-flowing ammonium polyphosphate of the general formulaH.sub.(n-m)+2 (NH.sub.4).sub.m P.sub.n O.sub.3n+1in which n stands for a whole number with an average value of about 20 to 800 and the ratio of m/n is about 1, and(b) about 0.5 to 50 weight % of a cured water-insoluble artificial resin encapsulating the individual particles of the flame-retarding agent or ammonium polyphosphate.The disclosure also relates to difficulty flammable boards veneered with wood or a laminate.Type: GrantFiled: October 6, 1986Date of Patent: October 20, 1987Assignee: Hoechst AktiengesellschaftInventors: Fritz-Reichard Fuchs, Horst Staendeke
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Patent number: 4670484Abstract: The disclosure relates to difficultly flammable wooden articles, especially chip boards comprising solid and pipe boards, prepared by extrusion from wooden chips and/or woody fibrous materials. The articles contain as a flame-retarding addend a product of(a) 50 to 99.5 weight % of a flame-retarding agent physically and chemically stable under extrusion conditions, preferably 75 to 99.5 weight % of a pulverulent, free-flowing ammonium polyphosphate of the general formulaH.sub.(n-m)+2 (NH.sub.4).sub.m P.sub.n O.sub.3n+1in which n stands for a whole number with an average value of about 20 to 800 and the ratio of m/n is about 1, and(b) about 0.5 to 50 weight % of a cured water-insoluble artificial resin encapsulating the individual particles of the flame-retarding agent or ammonium polyphosphate.The disclosure also relates to difficultly flammable boards veneered with wood or a laminate.Type: GrantFiled: November 2, 1984Date of Patent: June 2, 1987Assignee: Hoechst AktiengesellschaftInventors: Fritz-Reichard Fuchs, Horst Staendeke
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Patent number: 4639331Abstract: The disclosure relates to a process for making a particulate agent stable to hydrolysis based on free-flowing, pulverulent ammonium polyphosphate by treating the ammonium polyphosphate with a thermosetting, artificial resin being water-insoluble when cured. More specifically, the disclosure provides for the ammonium polyphosphate, an aliphatic alcohol as a diluent, and a melamine/formaldehyde-resin or phenol/formaldehyde-resin to be placed in an autoclave and intimately mixed at room temperature; for the mixture to be heated to a temperature of about 80.degree. to about 180.degree. C. and allowed to remain over a period of 15 to 240 minutes at that temperature and under the pressure corresponding to the vapor pressure of the diluent; for the diluent to be separated and for the product so obtained to be dried.Type: GrantFiled: April 23, 1984Date of Patent: January 27, 1987Assignee: Hoechst AktiengesellschaftInventors: Georg Elsner, Horst Staendeke, Gero Heymer
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Patent number: 4515632Abstract: The disclosure provides activated ammonium polyphosphate undergoing decomposition at an increased rate at temperatures within the range 300.degree. to 600.degree. C., the ammonium polyphosphate having been obtained by reacting it with melamine and/or dicyandiamide or their derivatives at 100.degree. to 200.degree. C.Type: GrantFiled: October 3, 1983Date of Patent: May 7, 1985Assignee: Hoechst AktiengesellschaftInventors: Alexander Maurer, Horst Staendeke
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Patent number: 4514328Abstract: The disclosure relates to a particulate agent based on free-flowing, pulverulent ammonium polyphosphate of the general formulaH.sub.(n-M)+2 (NH.sub.4).sub.m P.sub.n O.sub.3n+1in which n stands for a whole number with an average value of about 20 to 800 and the ratio of m/n is about 1. The agent reduces the ignitability of combustible substances and constists of(a) about 80 to 99.5 mass % ammonium polyphosphate and(b) about 0.5 to 20 mass % hardened epoxide resin having an epoxide equivalent weight of about 170 to about 220, the epoxide resin enveloping the individual ammonium polyphosphate particles.Type: GrantFiled: April 15, 1983Date of Patent: April 30, 1985Assignee: Hoechst AktiengesellschaftInventors: Horst Staendeke, Franz-Josef Dany, Joachim Kandler