Patents by Inventor Christina Despotopoulou
Christina Despotopoulou 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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Publication number: 20220411634Abstract: The present disclosure is directed to a radiation curable composition comprising a (meth)acrylate functionalized polysiloxane polymer. In some embodiments the composition further comprises one or more of a crosslinker, fumed silica, a functionalized silsesquioxane, and/or an acrylate monomer. The composition can be used as a component of an adhesive, sealant or coating. In some embodiments the composition can be used as a curable resin for additive manufacturing. The compositions are low viscosity liquids at room temperature and resist compression set.Type: ApplicationFiled: June 21, 2022Publication date: December 29, 2022Inventors: Matthew Ahearn, Tianzhi Zhang, Christina Despotopoulou, Sebastien Lanau, Johann Klein
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Patent number: 11326027Abstract: A method for producing a hydroxyl-functionalized polysiloxane having secondary or tertiary hydroxyl groups, said method comprising the steps of: i) reacting a hydroxyalkyl allyl ether having a secondary or tertiary alcohol group with a siloxane under anhydrous conditions and under transition metal catalysis, said hydroxylalkyl allyl ether conforming to Formula (I) wherein n is 0, 1, 2, 3, 4 or 5, preferably 0; m is 1, 2, 3, 4 or 5, preferably 1; spacer group A is constituted by a covalent bond or a C1-C20 alkylene group; R1 is hydrogen, a C1-C8 alkyl group, a C3-C10 cycloalkyl group, a C6-C18 aryl group or an aralkyl group; Ra, Rb, Rc, Rd, R2, R3, R4 and R5 may be the same or different and each is independently selected from hydrogen, a C1-C8 alkyl group, a C6-C18 aryl group or a C6-C18 aralkyl group, with the proviso that at least one of R3 and R4 is not hydrogen; and said siloxane conforming to Formula (II) wherein m is 1, 2, 3, 4 or 5, preferably 1; R6, R7, R8 and R9 may beType: GrantFiled: June 14, 2019Date of Patent: May 10, 2022Assignee: Henkel AG & Co. KGaAInventors: Marleen Winterberg, Marta Woznicka, Annika Dietrich, Esteban Mejia, Udo Kragl, Christina Despotopoulou, Ralf Dunekake, David Briers, Johann Klein, Henrik Lund
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Patent number: 11236193Abstract: Disclosed are silane modified copolymers that are moisture curable; curable adhesive compositions comprising the silane modified copolymers; and methods of making the silane modified copolymers.Type: GrantFiled: November 1, 2019Date of Patent: February 1, 2022Assignees: Henkel AG & Co. KGaA, Henkel IP & Holding GmbHInventors: Wu Suen, Andrea Keys Eodice, Claudia Meckel-Jonas, Johann Klein, Christina Despotopoulou, Jan-Erik Damke
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Publication number: 20220025180Abstract: The present disclosure is directed to a process for the preparation of curable, (meth)acrylate functionalized polysiloxanes. In addition, the present disclosure is directed to a curable, (meth)acrylate-functionalized polysiloxane obtained thereby and curable compositions comprising these curable, (meth)acrylate-functionalized polysiloxanes.Type: ApplicationFiled: October 8, 2021Publication date: January 27, 2022Inventors: Bahram Issari, Christina Despotopoulou, Johann Klein, Tianzhi Zhang
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Publication number: 20210332176Abstract: Curable compositions that undergo reaction induced phase separation of domains in cured matrix and provide beneficial physical and chemical properties and methods of use of such compositions. Curable compositions that undergo reaction induced phase separation of domains in cured matrix in response to a first set of curing conditions and the domains undergo a second reaction in response to a second set of curing conditions to improve the physical properties of the domains and the cured composition, such as improvements in glass transition temperature and thermal degradation.Type: ApplicationFiled: July 8, 2021Publication date: October 28, 2021Inventors: Bahram Issari, Michael Paul Levandoski, Christina Despotopoulou, Tianzhi Zhang, Darel Gustafson, Robert P. Cross
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Patent number: 11021565Abstract: Disclosed is a moisture curable silane modified terpolymer comprising a polyether segment, a segment of polytetrahydrofuran or polycarbonate, a polysiloxane segment and terminal amino silane groups joined to the terpolymer via urethane linkages and wherein the polyether segment comprises at least 70% by weight based on the total weight of the silane modified terpolymer. Also disclosed is a method of forming moisture curable silane modified terpolymer.Type: GrantFiled: May 5, 2020Date of Patent: June 1, 2021Assignees: Henkel AG & Co. KGaA, Henkel IP & Holding GmbHInventors: Wu Suen, Andrea Keys Eodice, Claudia Meckel-Jonas, Christina Despotopoulou, Johann Klein
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Publication number: 20210147632Abstract: The invention relates to a process for preparing polyorganosiloxanes by (i) condensation polymerization of at least one linear organosiloxane which has at least one hydroxy group or hydrolysable group bound to a silicon atom, (ii) ring-opening polymerization of at least one cyclosiloxane, or (iii) ring-opening polymerization and condensation polymerization of a mixture of at least one linear organosiloxane which has at least one hydroxy group or hydrolysable group bound to a silicon atom and at least one cyclosiloxane with a basic initiator and a hydroxy group-containing compound in the presence of a polar aprotic solvent, wherein the obtained polyorganosiloxanes are not miscible in the polar aprotic solvent at room temperature.Type: ApplicationFiled: January 26, 2021Publication date: May 20, 2021Inventors: Christina Despotopoulou, Johann Klein, Therese Hemery, Esteban Mejia, Udo Kragl, Theresia Koehler, Lea Grefe
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Patent number: 10961393Abstract: The invention relates to a curable composition comprising a) at least one polymer having at least one terminal group of the general formula (I) -An-R—SiXYZ??(I), wherein A is a divalent or trivalent bonding group containing at least one heteroatom, R is selected from divalent hydrocarbon residues having 1 to 12 carbon atoms, X, Y, Z are, independently of one another, selected from the group consisting of a hydroxyl group and C1 to C8 alkyl, C1 to C8 alkoxy, C1 to C8 acyloxy groups and —CH2—N—R? wherein N is oxygen, nitrogen or sulfur, preferably oxygen, and R? is selected from C1 to C8 alkyl groups, preferably a methyl group, wherein X, Y, Z are substituents directly bound with the Si atom or the two of the substituents X, Y, Z form a ring together with the Si atom to which they are bound, and at least one of the substituents X, Y, Z is selected from the group consisting of a hydroxyl group, C1 to C8 alkoxy or C1 to C8 acyloxy groups, and n is 0 or 1; and b) at least one compound of the general formula (II)Type: GrantFiled: June 18, 2019Date of Patent: March 30, 2021Assignee: Henkel AG & Co. KGaAInventors: Jan-Erik Damke, Christina Despotopoulou, Ralf Baetzgen, Johann Klein
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Publication number: 20210040269Abstract: The present invention is directed to a hydroxyl-functionalized polyether-polysiloxane block copolymer of the structure A(-X—B)n wherein: A represents said polysiloxane block; B represents said polyether block; X is a linker group characterized by including the moiety Si—C—C— of which said Si is the terminal silicon atom of the polysiloxane block A; and, n is an integer of from 2 to 4, said block copolymer being further characterized by a terminal unsaturation of less than 0.04 meq/g, preferably less than 0.03 meq/g and more preferably less than 0.025 meq/g and the method for producing thereof.Type: ApplicationFiled: October 20, 2020Publication date: February 11, 2021Inventors: Marta Woznicka, Swarup Ghosh, Marion Marquardt, Esteban Mejia, Udo Kragl, Christina Despotopoulou, Jan-Erik Damke, Johann Klein
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Patent number: 10800881Abstract: The invention relates to a curable composition comprising a) at least one polymer having at least one terminal group of the general formula (I) -An-R—SiXYZ??(I), wherein A is a divalent bonding group containing at least one heteroatom, R is selected from divalent hydrocarbon residues having 1 to 12 carbon atoms, X, Y, Z are, independently of one another, selected from the group consisting of a hydroxyl group and C1 to C8 alkyl, C1 to C8 alkoxy, and C1 to C8 acyloxy groups, wherein X, Y, Z are substituents directly bound with the Si atom or the two of the substituents X, Y, Z form a ring together with the Si atom to which they are bound, and at least one of the substituents X, Y, Z is selected from the group consisting of a hydroxyl group, C1 to C8 alkoxy or C1 to C8 acyloxy groups, and n is 0 or 1; and b) at least one compound of the general formula (II) wherein R? is same or different and is, independently from one another, selected from the group consisting of a hydrogen atom and hydrocarbon residuesType: GrantFiled: December 3, 2018Date of Patent: October 13, 2020Assignee: Henkel AG & Co. KGaAInventors: Christina Despotopoulou, Jan-Erik Damke, Markus Bonigut, Johann Klein
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Publication number: 20200277445Abstract: Disclosed is a terminally functionalized polysiloxane urethane polymer comprising: polysiloxane segments comprising from 50 to 98% by weight based on the total polymer weight; urethane segments comprising from 2 to 50% by weight based on the total polymer weight; and terminal functional groups selected from (meth)acrylate functional groups, alkoxysilyl functional groups and mixtures thereof. The terminally functionalized polysiloxane urethane polymer finds use in liquid optically clear adhesive formulations wherein it can provide dual photo and moisture cure properties. In some embodiments cured reaction products of the liquid optically clear adhesive composition prepared with the terminally functionalized polysiloxane urethane polymer exhibit low haze of 2% or less and low yellowness b* values of 2 or less as prepared and after aging testing.Type: ApplicationFiled: May 20, 2020Publication date: September 3, 2020Inventors: Shuhua Jin, David P. Dworak, Qinyan Zhu, Alfred A. DeCato, Christina Despotopoulou
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Publication number: 20200262966Abstract: Disclosed is a moisture curable silane modified terpolymer comprising a polyether segment, a segment of polytetrahydrofuran or polycarbonate, a polysiloxane segment and terminal amino silane groups joined to the terpolymer via urethane linkages and wherein the polyether segment comprises at least 70% by weight based on the total weight of the silane modified terpolymer. Also disclosed is a method of forming moisture curable silane modified terpolymer.Type: ApplicationFiled: May 5, 2020Publication date: August 20, 2020Inventors: Wu Suen, Andrea Keys Eodice, Claudia Meckel-Jonas, Christina Despotopoulou, Johann Klein
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Publication number: 20200063007Abstract: Disclosed are silane modified copolymers that are moisture curable; curable adhesive compositions comprising the silane modified copolymers; and methods of making the silane modified copolymers.Type: ApplicationFiled: November 1, 2019Publication date: February 27, 2020Inventors: Wu Suen, Andrea Keys Eodice, Claudia Meckel-Jonas, Johann Klein, Christina Despotopoulou, Jan-Erik Damke
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Publication number: 20190322808Abstract: A method for producing a hydroxyl-functionalized polysiloxane having secondary or tertiary hydroxyl groups, said method comprising the steps of: i) reacting a hydroxyalkyl allyl ether having a secondary or tertiary alcohol group with a siloxane under anhydrous conditions and under transition metal catalysis, said hydroxylalkyl allyl ether conforming to Formula (I) wherein n is 0, 1, 2, 3, 4 or 5, preferably 0; m is 1, 2, 3, 4 or 5, preferably 1; spacer group A is constituted by a covalent bond or a C1-C20 alkylene group; R1 is hydrogen, a C1-C8 alkyl group, a C3-C10 cycloalkyl group, a C6-C18 aryl group or an aralkyl group; Ra, Rb, Rc, Rd, R2, R3, R4 and R5 may be the same or different and each is independently selected from hydrogen, a C1-C8 alkyl group, a C6-C18 aryl group or a C6-C18 aralkyl group, with the proviso that at least one of R3 and R4 is not hydrogen; and said siloxane conforming to Formula (II) wherein m is 1, 2, 3, 4 or 5, preferably 1; R6, R7, R8 and R9 may beType: ApplicationFiled: June 14, 2019Publication date: October 24, 2019Inventors: Marleen Winterberg, Marta Woznicka, Annika Dietrich, Esteban Mejia, Udo Kragl, Christina Despotopoulou, Ralf Dunekake, David Briers, Johann Klein, Henrik Lund
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Publication number: 20190300712Abstract: The invention relates to a curable composition comprising a) at least one polymer having at least one terminal group of the general formula (I) -An-R—SiXYZ??(I), wherein A is a divalent or trivalent bonding group containing at least one heteroatom, R is selected from divalent hydrocarbon residues having 1 to 12 carbon atoms, X, Y, Z are, independently of one another, selected from the group consisting of a hydroxyl group and C1 to C8 alkyl, C1 to C8 alkoxy, C1 to C8 acyloxy groups and —CH2—N—R? wherein N is oxygen, nitrogen or sulfur, preferably oxygen, and R? is selected from C1 to C8 alkyl groups, preferably a methyl group, wherein X, Y, Z are substituents directly bound with the Si atom or the two of the substituents X, Y, Z form a ring together with the Si atom to which they are bound, and at least one of the substituents X, Y, Z is selected from the group consisting of a hydroxyl group, C1 to C8 alkoxy or C1 to C8 acyloxy groups, and n is 0 or 1; and b) at least one compound of the general formula (IIType: ApplicationFiled: June 18, 2019Publication date: October 3, 2019Inventors: Jan-Erik Damke, Christina Despotopoulou, Ralf Baetzgen, Johann Klein
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Publication number: 20190100618Abstract: The invention relates to a curable composition comprising a) at least one polymer having at least one terminal group of the general formula (I) -An-R-SiXYZ??(I), wherein A is a divalent bonding group containing at least one heteroatom, R is selected from divalent hydrocarbon residues having 1 to 12 carbon atoms, X, Y, Z are, independently of one another, selected from the group consisting of a hydroxyl group and C1 to C8 alkyl, C1 to C8 alkoxy, and C1 to C8 acyloxy groups, wherein X, Y, Z are substituents directly bound with the Si atom or the two of the substituents X, Y, Z form a ring together with the Si atom to which they are bound, and at least one of the substituents X, Y, Z is selected from the group consisting of a hydroxyl group, C1 to C8 alkoxy or C1 to C8 acyloxy groups, and n is 0 or 1; and b) at least one compound of the general formula (II) wherein R? is same or different and is, independently from one another, selected from the group consisting of a hydrogen atom and hydrocarbon residuesType: ApplicationFiled: December 3, 2018Publication date: April 4, 2019Inventors: Christina Despotopoulou, Jan-Erik Damke, Markus Bonigut, Johann Klein
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Patent number: 9783714Abstract: Allyl-cyanoacrylate-containing compositions with an anhydride aromatic component, which when cured confers improved moisture resistance, are provided.Type: GrantFiled: March 15, 2013Date of Patent: October 10, 2017Assignee: Henkel IP & Holding GmbHInventors: Ciara Goff, Marisa Phelan, John Guthrie, Cormac Duffy, Sabine Horn, Christina Despotopoulou
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Publication number: 20140262021Abstract: Allyl-cyanoacrylate-containing compositions with an anhydride aromatic component, which when cured confers improved moisture resistance, are provided.Type: ApplicationFiled: March 15, 2013Publication date: September 18, 2014Applicant: Henkel Ireland LimitedInventors: Ciara Goff, Marisa Phelan, John Guthrie, Cormac Duffy, Sabine Horn, Christina Despotopoulou