Patents by Inventor Dieter Barfurth
Dieter Barfurth 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).
-
Patent number: 7939616Abstract: The present Invention relates to a mixture comprising catenary, branched and for cyclic siloxanes of the general formula (I) where x is 1, 2 or 3, the substituents R are (i) organofunctional groups selected from —CH2—SH, —CH2—S—(CO)—R?, —CH2—(O—C2H4)a—OH with a=1 to 10, —CH2(O—C2H4)b—OR? with b=1 to 40, —(CH2)—NH2, —(CH2)—NHR?, —(CH2)—NR?2, —(CH2)—NH(CH2)2—NH2, —(CH2)—N[(CH2)2—NH2]2 and —(CH2)—NH(CH2)2—NH(CH2)2—NH2, In which R? is a linear, branched or cyclic alkyl group having 1 to 18 carbon atoms or an aryl group having 6 to 12 carbon atoms, (ii) hydroxyl, methoxy, ethoxy, 2-methoxyethoxy, isopropoxy, n-propoxy, isobutoxy and for n-butoxy groupe, and (iii) where appropriate, alkyl, alkenyl, isoalkyl, cycloalkyl or fluorcalkyl groups having 1 to 18 carbon atoms or aryl groups having 6 to 12 carbon atoms, whit the proviso that not more than one organofunctional group (i) is attached per silicon atom, the quotient of the molar ratio of the moiety (ii) to silicon le from I to 2, and the degree of oligornerizatiType: GrantFiled: March 18, 2004Date of Patent: May 10, 2011Assignee: Evonik Degussa GmbHInventors: Dieter Barfurth, Helmut Mack
-
Patent number: 7847018Abstract: The present invention relates to a polymer dispersion wherein the components of a physical mixture comprising (i) at least one unsaturated silane of the general formula (I): [H2C?CX(Y)n]Si(CH3)p(R)3-p in which X is a hydrogen atom or a methyl group, Y is a divalent group selected from —CH2— and —C(O)O—(CH2)3—, n is 0 or 1, R is an alkoxy group selected from methoxy, ethoxy, n-propoxy, isopropoxy, n-butoxy, isobutoxy, and 2-methoxyethoxy, and p is 0 or 1, and (ii) at least one organosilane of the general formula (II): R1Si(CH3)q(R2)3-q in which R1 is a linear, branched or cyclic alkyl group having 1 to 18 carbon atoms or is an aryl group or is a polyether group, R2 is an alkoxy group selected from methoxy, ethoxy, n-propoxy, isopropoxy, n-butoxy, isobutoxy and 2-methoxyethoxy, and q is 0 or 1, and/or at least one silicic ester of the general formula (III): Si(R3)4, in which groups R3 are identical or different and R3 is an alkoxy group selected from methoxy, ethoxy, n-propoxy, isopropoxy, n-butoxy and isobutoxType: GrantFiled: June 2, 2004Date of Patent: December 7, 2010Assignee: Evonik Degussa GmbHInventors: Dieter Barfurth, Helmut Mack
-
Patent number: 7625975Abstract: The present invention relates to a composition acting as coupling agent between fillers and peroxidically crosslinking elastomers in rubber compounds, which comprises, as component comprising silicon compounds, a mixture a) of vinylalkoxysiloxanes with alkylalkoxy-siloxanes, or b) of vinylalkoxysiloxanes with phenylalkoxy-siloxanes, or c) of vinylalkoxysiloxanes with phenyl/alkyl-alkoxysiloxanes or d) of acrylic or methacrylic alkoxysiloxanes with alkylalkoxysiloxanes, or e) of acrylic or methacrylic alkoxysiloxanes with phenylalkoxysiloxanes, or f) of acrylic or methacrylic alkoxysiloxanes with phenyl/alkylalkoxysiloxanes, or g) of at least one co-oligomeric organosiloxane which, as organofunctional groups, bears at least one group from the series vinyl, acrylic and methacrylic, and at least one group from the series alkyl and phenyl, and at least one alkoxy or hydroxy group.Type: GrantFiled: June 20, 2003Date of Patent: December 1, 2009Assignee: Degussa AGInventors: Dieter Barfurth, Helmut Mack, Burkhard Standke
-
Publication number: 20080146730Abstract: The present invention relates to a polymer dispersion wherein the components of a physical mixture comprising (i) at least one unsaturated silane of the general formula (I): [H2C?CX(Y)n]Si(CH3)p(R)3-p in which X is a hydrogen atom or a methyl group, Y is a divalent group selected from —CH2— and —C(O)O—(CH2)3—, n is 0 or 1, R is an alkoxy group selected from methoxy, ethoxy, n-propoxy, isopropoxy, n-butoxy, isobutoxy, and 2-methoxyethoxy, and p is 0 or 1, and (ii) at least one organosilane of the general formula (II): R1Si(CH3)q(R2)3-q in which R1 is a linear, branched or cyclic alkyl group having 1 to 18 carbon atoms or is an aryl group or is a polyether group, R2 is an alkoxy group selected from methoxy, ethoxy, n-propoxy, isopropoxy, n-butoxy, isobutoxy and 2-methoxyethoxy, and q is 0 or 1, and/or at least one silicic ester of the general formula (III): Si(R3)4, in which groups R3 are identical or different and R3 is an alkoxy group selected from methoxy, ethoxy, n-propoxy, isopropoxy, n-butoxy and isobutoxType: ApplicationFiled: June 2, 2004Publication date: June 19, 2008Applicant: Degussa AGInventors: Dieter Barfurth, Helmut Mack
-
Publication number: 20070032622Abstract: The present Invention relates to a mixture comprising catenary, branched andfor cyclic siloxanes of the general formula (I) where x is 1, 2 or 3, the substituents R are (i) organofunctional groups selected from —CH2—SH, —CH2—S—(CO)—R?, —CH2(O—C2H4)a—OH with a =1 to 10, —CH2(O—C2H4)b—OR? with b =1 to 40, —(CH2)—NH2, —(CH2)—NHR?, —(CH2)—NR?2, —(CH2)—NH(CH2)2—NH2, —(CH2)—N[(CH2)2—NH2]2 and —(CH2) —NH(CH2)2—NH(CH2)2—NH2, In which R? is a linear, branched or cyclic alkyl group having 1 to 18 carbon atoms or an aryl group having 6 to 12 carbon atoms, (ii) hydroxyl, methoxy, ethoxy, 2-methoxyethoxy, isopropoxy, n-propoxy, isobutoxy andfor n-butoxy groupe, and (iii) where appropriate, alkyl, alkenyl, isoalkyl, cycloalkyl or fluorcalkyl groups having 1 to 18 carbon atoms or aryl groups having 6 to 12 carbon atoms, whit the proviso that not more than one organofunctional group (i) is attached per silicon atom, the quotient of the molar ratio of the moiety (ii) to silicon le from I to 2, and the degree of oligornerizatiType: ApplicationFiled: March 18, 2004Publication date: February 8, 2007Applicant: DEGUSSA AGInventors: Dieter Barfurth, Helmut Mack
-
Publication number: 20070032609Abstract: The present invention relates to a composition acting as coupling agent between fillers and peroxidically crosslinking elastomers in rubber compounds, which comprises, as component comprising silicon compounds, a mixture a) of vinylalkoxysiloxanes with alkylalkoxy-siloxanes, or b) of vinylalkoxysiloxanes with phenylalkoxy-siloxanes, or c) of vinylalkoxysiloxanes with phenyl/alkyl-alkoxysiloxanes or d) of acrylic or methacrylic alkoxysiloxanes with alkylalkoxysiloxanes, or e) of acrylic or methacrylic alkoxysiloxanes with phenylalkoxysiloxanes, or f) of acrylic or methacrylic alkoxysiloxanes with phenyl/alkylalkoxysiloxanes, or g) of at least one co-oligomeric organosiloxane which, as organofunctional groups, bears at least one group from the series vinyl, acrylic and methacrylic, and at least one group from the series alkyl and phenyl, and at least one alkoxy or hydroxy group.Type: ApplicationFiled: June 20, 2003Publication date: February 8, 2007Applicant: Degussa AGInventors: Dieter Barfurth, Helmut Mack, Burkhard Standke
-
Patent number: 7125922Abstract: A composition containing an alkoxysiloxane including a catenate alkoxysilane of formula I and/or a cyclic siloxane of formula II, and a crosslinkable polymer compound and the use thereof as a water scavenger, dryer or precuring retarder R3Si—O—[SiR2—O—]mSiR3??(I)Type: GrantFiled: August 28, 2003Date of Patent: October 24, 2006Assignee: Degussa AGInventors: Dieter Barfurth, Helmut Mack
-
Patent number: 6858746Abstract: A compound having at least one H—Si group is reacted with an unsaturated aliphatic compound in the presence of a platinum catalyst and at least one organic additive component. The combination of platinum catalyst and additive component is one of: (i) a solution of a Pt(0) complex catalyst in a solvent, with at least one organic amide, or (ii) a solution of a Pt(0) complex catalyst in a solvent, with at least one organic amine, or (iii) a solution of a Pt(0) complex catalyst, in a solvent, with at least one organic nitrite.Type: GrantFiled: October 10, 2002Date of Patent: February 22, 2005Assignee: Degussa AGInventors: Sabine Giessler, Helmut Mack, Dieter Barfurth
-
Patent number: 6784272Abstract: A metal-free, in particular tin-free, silane-terminated polyurethane which is useful in adhesives or sealant compositions is obtained by reacting at least one aliphatic secondary aminoalkylalkoxysilane of formula (Ia) R—NH—(CH2)3Si(R1)x(OR2)(3-X) (Ia) or at least one aliphatic secondary aminoalkylalkoxysilane of formula (Ib) R—NH—CH2—CH(R1)—CH2—Si(R1)x(OR2)(3-X) (Ib) wherein in the formulae (Ia) and (Ib), R is a linear or branched alkyl group having 1 to 18 C atoms, R1 is a methyl group, R2 is a methyl or ethyl group and x is 0 or 1, with a polyurethane prepolymer having at least one terminal isocyanate group in the absence of a metal catalyst.Type: GrantFiled: March 29, 2002Date of Patent: August 31, 2004Assignee: Degussa AGInventors: Helmut Mack, Dieter Barfurth
-
Patent number: 6780955Abstract: The present invention provides a process for preparing a mixture, which mixture includes catenate and cyclic siloxanes of formula I R3Si—O—(SiR2—O—)mSiR3 (I) and cyclic siloxanes of formula II wherein m is an integer from 0 to 40 and n is an integer from 2 to 40, wherein R2 and R3 are each independently an organic functional group selected from the group including alkyl, aryl, vinyl, and alkoxy groups, and wherein there is not more than one vinyl group or aryl group per silicon atom, said process including a controlled hydrolysis, condensation or cocondensation reaction of at least one monomeric silane in alcoholic solution in the presence of an acidic catalyst, which reaction includes contacting alcohol, water, and at least one chlorosilane component selected from the group including (i), (ii), (iii): (i) at least one arylchlorosilane; (ii) at least one admixture selected from the group including alkylchlorosilane and arylchlorosilane, arylchlorosiType: GrantFiled: January 23, 2003Date of Patent: August 24, 2004Assignee: Degussa AGInventors: Dieter Barfurth, Helmut Mack
-
Publication number: 20040054048Abstract: A composition containing an alkoxysiloxane including a catenate alkoxysilane of formula I and/or a cyclic siloxane of formula II, and a crosslinkable polymer compound and the use thereof as a water scavenger, dryer or precuring retarder.Type: ApplicationFiled: August 28, 2003Publication date: March 18, 2004Applicant: DEGUSSA AGInventors: Dieter Barfurth, Helmut Mack
-
Publication number: 20030166817Abstract: The present invention provides a process for preparing a mixture, which mixture includes catenate and cyclic siloxanes of formula IType: ApplicationFiled: January 23, 2003Publication date: September 4, 2003Applicant: DEGUSA AGInventors: Dieter Barfurth, Helmut Mack
-
Publication number: 20030100784Abstract: A compound having at least one H—Si group is reacted with an unsaturated aliphatic compound in the presence of a platinum catalyst and at least one organic additive component.Type: ApplicationFiled: October 10, 2002Publication date: May 29, 2003Applicant: DEGUSSA AGInventors: Sabine Giessler, Helmut Mack, Dieter Barfurth
-
Patent number: 6500883Abstract: Fillers surface-modified by treatment with an organosilane- and/or organosiloxane-containing agent for preparing filled polyamide compositions.Type: GrantFiled: September 12, 2000Date of Patent: December 31, 2002Assignee: Degussa AGInventors: Helmut Mack, Peter Jenkner, Roland Edelmann, Dieter Barfurth, Alber-Johannes Frings, Burkhard Standke, Jaroslaw Monkiewicz, Michael Horn, Thomas Schlosser
-
Publication number: 20020188068Abstract: A metal-free, in particular tin-free, silane-terminated polyurethane which is useful in adhesives or sealant compositions is obtained by reacting at least one aliphatic secondary aminoalkylalkoxysilane of formula (Ia)Type: ApplicationFiled: March 29, 2002Publication date: December 12, 2002Applicant: DEGUSSA AGInventors: Helmut Mack, Dieter Barfurth
-
Patent number: 6444315Abstract: An encapsulated flame retardant is made by a process including applying an organic silicon composition to a powder flame retardant. The organic silicon composition is an organofunctional-silane or a mixture of organofunctional silanes, an oligomeric organosiloxane or a mixture of oligomeric organosiloxanes, or a solvent-containing preparation based on monomeric organosilanes and/or on oligomeric organosiloxanes, or a preparation based on water-soluble organopolysiloxanes, or mixtures of any or all of these. These surface-modified flame retardants are used in particular in polymers and polymer compounds, for rendering naturally occurring materials flame retardant, and also for the intumescent coating of combustible materials.Type: GrantFiled: July 6, 1999Date of Patent: September 3, 2002Assignees: Degussa AG, Chemische Fabrik Budenheim Rudolf A. OetkerInventors: Dieter Barfurth, Helmut Mack, Karl Goetzmann, Vincente Mans, Hans-Dieter Naegerl, Klaus Sommer
-
Patent number: 6403228Abstract: The invention relates to the use of (1) a liquid functional organylorganyloxysilane bound to a carrier, or of a liquid (co)condensate derived from a functional organylorganyloxysilane and bound to a carrier for preparing cable compounds which comprise (2) a thermoplastic base polymer having polar functional groups and (3) a reinforcing or extending mineral filler.Type: GrantFiled: June 26, 2000Date of Patent: June 11, 2002Assignee: Degussa AGInventors: Helmut Mack, Ralf Laven, Peter Jenkner, Roland Edelmann, Dieter Barfurth, Albert-Johannes Frings, Burkhard Standke, Jaroslaw Monkiewicz, Michael Horn
-
Patent number: 6395858Abstract: The present invention relates to mixtures of catenate and cyclic siloxane oligomers of the formulae I and II where the substituents R consist of (i) aminopropyl-functional groups of the formula —(CH2)3—NH2 or —(CH2)3—NHR′ or —(CH2)3—NH(CH2)2—NH2 or —(CH2)3—NH(CH2)2—NH(CH2)2—NH2,in which R′ is a linear, branched or cyclic alkyl group of 1 to 18 carbon atoms or an aryl group of 6 to 12 carbon atoms, and (ii) methoxy, ethoxy, 2-methoxyethoxy and/or propoxy groups, and (iii) if desired, alkyl, alkenyl, isoalkyl or cycloalkyl groups of 1 to 18 carbon atoms and/or aryl groups of 6 to 12 carbon atoms, and where not more than one aminopropyl-functional group is attached to one silicon atom and the degree of oligomerization of compounds of the formula I is within the range 2<m<30 and that of compounds of the formula II is 3≦n≦30 and the quotient of the molar proportion of Si/alkoxy group is ≧0.5.Type: GrantFiled: October 27, 1999Date of Patent: May 28, 2002Assignee: Degussa AGInventors: Helmut Mack, Dieter Barfurth, Roland Edelmann, Albert-Johannes Frings, Michael Horn, Peter Jenkner, Ralf Laven, Jaroslaw Monkiewicz, Burkhard Standke
-
Patent number: 6255513Abstract: The present invention relates to a stable composition of water-soluble organosiloxanes obtained by reacting a) a water-soluble amino-functional alkoxysilane with at least one water-insoluble alkenyl-functional alkoxysilane b) by adding water to form a mixture, and c) removing the alcohol formed during step b) from the mixture, where the amino-functional alkoxysilane and the water are used in the reaction at least in amounts such that substantially all of the alkoxy groups of the water-insoluble silane can react and such that when a resulting composition is diluted with water, essentially no alcohol is liberated by hydrolysis, and the composition, during an/or after the reaction, has a pH of from 2 to 6, the pH being preferably adjusted by adding an organic or inorganic, optionally aqueous, acid. In addition, the present invention discloses a process for the preparation of such a composition and also its use.Type: GrantFiled: April 28, 1999Date of Patent: July 3, 2001Assignee: Huels AktiengesellschaftInventors: Burkhard Standke, Jaroslaw Monkiewicz, Albert-Johannes Frings, Ralf Laven, Roland Edelmann, Peter Jenkner, Helmut Mack, Dieter Barfurth, Michael Horn
-
Patent number: 6239194Abstract: The present invention relates to surface-modified fillers obtained by mixing a filler with water, adding an water-based organosiloxane composition with very thorough mixing, wherein the organosiloxanes are soluble in water and contain, in addition to OH groups, at least one amino-functional group and optionally a functional group from the series consisting of alkyl, haloalkyl, alkenyl, glycidyl ether alkyl, acryloxyalkyl and methacryloxyalkyl, and wherein a functional group is bonded to each silicon atom of the organosiloxane, and drying the mixture. The present invention also provides a process for the surface modification of fillers, their use and ethylene-vinyl acetate copolymer compositions which include the surface-modified fillers.Type: GrantFiled: April 28, 1999Date of Patent: May 29, 2001Assignee: Huels AktiengesellschaftInventors: Burkhard Standke, Jaroslaw Monkiewicz, Albert-Johannes Frings, Ralf Laven, Roland Edelmann, Peter Jenkner, Helmut Mack, Dieter Barfurth, Michael Horn