Patents by Inventor Sacha Legrand
Sacha Legrand 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).
-
Publication number: 20200239680Abstract: Disclosed is an interpenetrating polymer network (IPN) that includes two polymers which are at least partially interlaced on a molecular scale, wherein the first polymer is obtainable by hydrolyzing a cross-linked poly(N-vinylformamide), and the second polymer is a copolymer of monomers A and B. The monomer A is preferably cationic, such as dimethylaminoethylacrylate methyl chloride, and the monomer B may be for example acrylamide. The IPN material may be used in paper making processes as drainage agent, retention agent, sizing agent or flocculant agent.Type: ApplicationFiled: August 29, 2016Publication date: July 30, 2020Inventors: Sacha LEGRAND, Marco POLVERARI
-
Patent number: 10584217Abstract: The present invention relates to an interpenetrating polymer network (IPN) material comprising a copolymer of vinylamine-vinylformamide, and a homo-polymer or a copolymer of at least one monomer selected from acrylamide or derivatives thereof, acrylic acid or derivatives thereof, or a mixture thereof forming the IPN material together with the copolymer of vinylamine-vinyl-formamide. The present invention further relates to a process for producing the IPN material, and to use of the IPN material in paper industry.Type: GrantFiled: May 11, 2016Date of Patent: March 10, 2020Assignee: Kemira OyjInventors: Rosa Carceller, Matti Hietaniemi, Sacha Legrand, Mari Zabihian
-
Patent number: 10189935Abstract: The invention provides new water soluble polymers for the use in industrial processes, where large quantities of water is handled, such as sludge dewatering and papermaking. These new polymers are water soluble cross-linked block copolymers, wherein the block copolymers are cross-linked together using a cross-linking agent. Each of the block copolymers contain two different blocks, and these blocks are formed from different monomers. The blocks are linked together with a molecular spacer derived from a bifunctional initiator used during the polymerization of the blocks. The monomers used in polymerizing the blocks are different with each other and they are selected from a group consisting of N-vinylformamide, acrylic acid, acrylamide and water-soluble derivatives thereof.Type: GrantFiled: April 10, 2015Date of Patent: January 29, 2019Assignee: KEMIRA OYJInventors: Asko Karppi, Matti Hietaniemi, Sacha Legrand
-
Patent number: 10174134Abstract: The present invention relates to a method for producing a cationic polyvinyl amine based copolymer. The present invention further relates to a cationic polyvinyl amine based copolymer and use of the copolymer in paper industry as a strength agent, a retention agent and a drainage agent.Type: GrantFiled: September 24, 2015Date of Patent: January 8, 2019Assignee: Kemira OyjInventor: Sacha Legrand
-
Publication number: 20180194906Abstract: The present invention relates to an interpenetrating polymer network (IPN) material comprising a copolymer of vinylamine-vinylformamide, and a homo-polymer or a copolymer of at least one monomer selected from acrylamide or derivatives thereof, acrylic acid or derivatives thereof, or a mixture thereof forming the IPN material together with the copolymer of vinylamine-vinyl-formamide. The present invention further relates to a process for producing the IPN material, and to use of the IPN material in paper industry.Type: ApplicationFiled: May 11, 2016Publication date: July 12, 2018Applicant: Kemira OyjInventors: Rosa CARCELLER, Matti HIETANIEMI, Sacha LEGRAND, Mari ZABIHIAN
-
Patent number: 10005873Abstract: New polyvinylamide and/or acryl acid-based copolymers. The new structured block copolymers are based on the block copolymerization of N-vinyl formamide (NVF) with other monomers by using a bifunctional initiator. Further, a method of preparing the structured block copolymer is provided, and especially a method wherein the NVF-based block is at least partially hydrolyzed to obtain PVAm. Also the use of the new structured block copolymers in sludge dewatering and in papermaking processes is disclosed.Type: GrantFiled: February 27, 2015Date of Patent: June 26, 2018Assignee: KEMIRA OYJInventors: Sacha Legrand, Marco Polverari, Rosa Carceller
-
Patent number: 9982394Abstract: The invention relates to a papermaking agent composition, preferably in powder form, which comprises a water-soluble polymer, which comprises 21-30 mol-% of vinylamine units and has an average molecular weight of at least 1 000 000 Da. The invention relates also to a method for treating of fiber stock in manufacture of paper, board or the like, where a thick fiber stock is obtained, it is diluted to a thin fiber stock having a consistency <3% by addition of water, and the thin fiber stock is drained and a continuous fibrous web is formed. The papermaking agent composition is added to the thick fiber stock or to the thin fiber.Type: GrantFiled: January 22, 2015Date of Patent: May 29, 2018Assignee: Kemira OyjInventors: Joonas Hokka, Matti Hietaniemi, Sacha Legrand, Marco Polverari
-
Publication number: 20170240661Abstract: The present invention relates to a method for producing a cationic polyvinyl amine based copolymer. The present invention further relates to a cationic polyvinyl amine based copolymer and use of the copolymer in paper industry as a strength agent, a retention agent and a drainage agent.Type: ApplicationFiled: September 24, 2015Publication date: August 24, 2017Applicant: Kemira OyjInventor: Sacha Legrand
-
Publication number: 20170145138Abstract: The invention provides new water soluble polymers for the use in industrial processes, where large quantities of water is handled, such as sludge dewatering and papermaking. These new polymers are water soluble cross-linked block copolymers, wherein the block copolymers are cross-linked together using a cross-linking agent. Each of the block copolymers contain two different blocks, and these blocks are formed from different monomers. The blocks are linked together with a molecular spacer derived from a bifunctional initiator used during the polymerization of the blocks. The monomers used in polymerizing the blocks are different with each other and they are selected from a group consisting of N-vinylformamide, acrylic acid, acrylamide and water-soluble derivatives thereof.Type: ApplicationFiled: April 10, 2015Publication date: May 25, 2017Inventors: Asko KARPPI, Matti HIETANIEMI, Sacha LEGRAND
-
Publication number: 20170002518Abstract: The invention relates to a papermaking agent composition, preferably in powder form, which comprises a water-soluble polymer, which comprises 21-30 mol-% of vinylamine units and has an average molecular weight of at least 1 000 000 Da. The invention relates also to a method for treating of fibre stock in manufacture of paper, board or the like, where a thick fibre stock is obtained, it is diluted to a thin fibre stock having a consistency <3% by addition of water, and the thin fibre stock is drained and a continuous fibrous web is formed. The papermaking agent composition is added to the thick fibre stock or to the thin fibre.Type: ApplicationFiled: January 22, 2015Publication date: January 5, 2017Applicant: Kemira OyjInventors: Joonas Hokka, Matti Hietaniemi, Sacha Legrand, Marco Polverari
-
Publication number: 20160369030Abstract: New polyvinylamide and/or acryl acid-based copolymers. The new structured block copolymers are based on the block copolymerization of N-vinyl formamide (NVF) with other monomers by using a bifunctional initiator. Further, a method of preparing the structured block copolymer is provided, and especially a method wherein the NVF-based block is at least partially hydrolyzed to obtain PVAm. Also the use of the new structured block copolymers in sludge dewatering and in papermaking processes is disclosed.Type: ApplicationFiled: February 27, 2015Publication date: December 22, 2016Inventors: Sacha LEGRAND, Marco POLVERARI, Rosa CARCELLER
-
Publication number: 20160252814Abstract: A siloxane composition and a method of producing the same. The composition comprises a siloxane prepolymer with a backbone exhibiting a group which is capable of being deprotonated in an aqueous base solution. Further, there are reactive functional groups, which are capable of reacting during thermal or radiation initiated curing. The siloxane is cross-linked during condensation polymerisation to increase molecular weight thereof. The composition can be used in high-resolution negative tone lithographic fabrication processes where a water based developer system is applied in the development step of the lithography process.Type: ApplicationFiled: February 25, 2016Publication date: September 1, 2016Inventors: Ari Karkkainen, Milja Hannu-Kuure, Sacha Legrand, Admir Hadzic, Graeme Gordon
-
Patent number: 9273209Abstract: A siloxane composition and a method of producing the same. The composition comprises a siloxane prepolymer with a backbone exhibiting a group which is capable of being deprotonated in an aqueous base solution. Further, there are reactive functional groups, which are capable of reacting during thermal or radiation initiated curing. The siloxane is cross-linked during condensation polymerization to increase molecular weight thereof. The composition can be used in high-resolution negative tone lithographic fabrication processes where a water based developer system is applied in the development step of the lithography process.Type: GrantFiled: November 28, 2008Date of Patent: March 1, 2016Assignee: Braggone OyInventors: Ari Kärkkäinen, Milja Hannu-Kuure, Sacha Legrand, Admir Hadzic, Graeme Gordon
-
Publication number: 20110111340Abstract: A siloxane composition and a method of producing the same. The composition comprises a siloxane prepolymer with a backbone exhibiting a group which is capable of being deprotonated in an aqueous base solution. Further, there are reactive functional groups, which are capable of reacting during thermal or radiation initiated curing. The siloxane is cross-linked during condensation polymerisation to increase molecular weight thereof. The composition can be used in high-resolution negative tone lithographic fabrication processes where a water based developer system is applied in the development step of the lithography process.Type: ApplicationFiled: November 28, 2008Publication date: May 12, 2011Inventors: Ari Karkkainen, Milja Hannu-Kuure, Sacha Legrand, Admir Hadzic, Graeme Gordon
-
Publication number: 20090142694Abstract: A siloxane composition and a method of producing the Same. The composition comprises a siloxane prepolymer with a backbone exhibiting a group which is capable of being deprotonated in an aqueous base solution. Further, there are reactive functional groups, which are capable of reacting during thermal or radiation initiated curing. The siloxane polymer is provided in a solvent which also contains a photo reactive compound. The composition can be used in negative tone lithographic fabrication processes where a water based developer system is applied in the development step of the lithography process.Type: ApplicationFiled: November 30, 2007Publication date: June 4, 2009Applicant: BRAGGONE OYInventors: Ari Karkkainen, Milja Hannu-Kuure, Sacha Legrand, Admir Hadzic, Graeme Gordon