Patents by Inventor Hartfrid Vollmer
Hartfrid Vollmer 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: 4351960Abstract: The invention relates to a process for making an isomeric mixture of secondary phosphines with the summation formula C.sub.20 H.sub.27 P. To this end, hydrogen phosphide is reacted with dicyclopentadiene in the presence of an agent yielding free radicals. More specifically, hydrogen phosphide and dicyclopentadiene are used in a molar ratio of 1 to at least 2 and the reaction is effected under a pressure of 5 to 90 bars. The mixture is used in the production of flotation aids and as an ingredient of catalytically active transition metal complexes.Type: GrantFiled: September 24, 1980Date of Patent: September 28, 1982Assignee: Hoechst AktiengesellschaftInventors: Georg Elsner, Hartfrid Vollmer, Gero Heymer
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Patent number: 4324919Abstract: The invention relates to a process for making tertiary phosphines of the general formula R.sub.3 P, in which R stands for a linear alkyl radical having 2 to 4 carbon atoms. To this end, hydrogen phosphide is reacted with linear monoolefins having 2 to 4 carbon atoms. More particularly, the tertiary phosphine which is desired to be made is dissolved in an inert solvent and PH.sub.3 and monoolefin are reacted in the solution.Type: GrantFiled: September 2, 1980Date of Patent: April 13, 1982Assignee: Hoechst AktiengesellschaftInventors: Georg Elsner, Hartfrid Vollmer, Ernst Reutel
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Patent number: 4156697Abstract: Alkyl phosphines of the general formula:R.sub.n PH.sub.3-n (I)are made. To this end hydrogen phosphide, a primary or a secondary phosphine is reacted with an alkylamine of the general formula:R.sub.n NH.sub.3-n (II)in a molar ratio of 0.1 to 10 mols of the alkylamine of formula II per mol of hydrogen phosphide or primary or secondary phosphine. The reaction is effected at a 150.degree. to 400.degree. C., at atmospheric pressure or a superatmospheric pressure up to 1 atmosphere gauge, and in contact with a catalyst comprising active carbon, copper (II) chromite, or one or more metals of Group Ib or VIII of the Periodic System of the elements. The starting materials are passed through a reaction zone at a rate which permits a contact time between them and the catalyst of 0.1 to 400 seconds.Type: GrantFiled: August 9, 1977Date of Patent: May 29, 1979Assignee: Hoechst AktiengesellschaftInventors: Klaus Hestermann, Hartfrid Vollmer, Gero Heymer, Ernst-Gunther Schlosser
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Patent number: 4118590Abstract: Production of novel phosphobetaines of general formula I ##STR1## in which R.sup.1 and R.sup.2 each stand for organic groups having from 1 to 18 carbon atoms, and R.sup.1 or R.sup.2 may be identical with the substituent R, the substituent R being a radical of the general formula II ##STR2## in which R.sup.3 and R.sup.4 each stand for organic groups having from 1 to 18 carbon atoms, and/or hydrogen atoms, and R.sup.5 stands for a linear or branched alkyl group having from 1 to 4 carbon atoms, which may optionally have a halogen or hydroxylic group substituent attached thereto.Type: GrantFiled: October 27, 1976Date of Patent: October 3, 1978Assignee: Hoechst AktiengesellschaftInventors: Hartfrid Vollmer, Klaus Hestermann
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Patent number: 4091012Abstract: Production of tertiary phosphine oxides which contain nitrile groups and correspond to the following general formula I: ##STR1## in which R.sup.1 and R.sub.2 each stand for a straight or branched, identical or different alkyl, cycloalkyl, aryl, alkylaryl or aralkyl group having 1 to 18 carbon atoms, and in which R.sup.1 or R.sub.2 may be identical with R, which stands for a radical of the following general formula II: ##STR2## in which R.sup.3 and R.sup.4 each stand for a straight or branched, identical or different alkyl, cycloalkyl, aryl, alkylaryl or aralkyl group having 1 to 18 carbon atoms, and/or hydrogen atoms. The tertiary phosphine oxides are made by reacting a phosphine of the following general formula III: ##STR3## in which R.sup.5 has the same meaning as R.sup.3 and R.sup.6 has the same meaning as R.sup.4 but is no hydrogen, with an .alpha.,.beta.-unsaturated nitrile of the following general formula IV: ##STR4## in which R.sup.3 and R.sup.4 have the meanings given above.Type: GrantFiled: March 24, 1977Date of Patent: May 23, 1978Assignee: Hoechst AktiengesellschaftInventors: Hartfrid Vollmer, Georg Elsner, Bernd Lippsmeier, Klaus Hestermann
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Patent number: 4061696Abstract: 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.Type: GrantFiled: September 28, 1976Date of Patent: December 6, 1977Assignee: Hoechst AktiengesellschaftInventors: Hartfrid Vollmer, Franz-Josef Dany, Joachim Wortmann
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Patent number: 4032498Abstract: 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.Type: GrantFiled: October 21, 1975Date of Patent: June 28, 1977Assignee: Hoechst AktiengesellschaftInventors: Franz-Josef Dany, Joachim Wortmann, Peter Munch, Hartfrid Vollmer
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Patent number: 4029721Abstract: 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.Type: GrantFiled: October 21, 1975Date of Patent: June 14, 1977Assignee: Hoechst AktiengesellschaftInventors: Hartfrid Vollmer, Franz-Josef Dany, Joachim Wortmann, Peter Munch
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Patent number: 4022852Abstract: Production of phosphorus-containing sulfamide derivatives of the general formula: ##STR1## In the above formula, R.sub.1 stands for an alkyl radical or a halogen-substituted, alkyl radical having from 1 to 6 carbon atoms or stands for an aryl radical, and R.sub.2, R.sub.3 and R.sub.Type: GrantFiled: July 1, 1975Date of Patent: May 10, 1977Assignee: Hoechst AktiengesellschaftInventor: Hartfrid Vollmer
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Patent number: 3998764Abstract: 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.Type: GrantFiled: November 6, 1974Date of Patent: December 21, 1976Assignee: Hoechst AktiengesellschaftInventors: Hartfrid Vollmer, Franz-Josef Dany, Joachim Wortmann
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Patent number: 3978170Abstract: 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.Type: GrantFiled: November 6, 1974Date of Patent: August 31, 1976Assignee: Hoechst AktiengesellschaftInventors: Hartfrid Vollmer, Franz-Josef Dany, Joachim Wortmann