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公开(公告)号：US20220289916A1
公开(公告)日：2022-09-15
申请号：US17694373
申请日：2022-03-14
申请人： Braskem S.A.
发明人： Kimberly Miller McLoughlin , Hadi Mohammadi , Michelle Kay Sing , Ana Paula de Azeredo , Nei Sebastião Domingues Junior , Murilo Lauer Sanson
摘要： A method may include processing a crosslinked polymer and a catalyst to form a vitrimer during a melt processing operation, the crosslinked polymer comprising at least one monomer selected from a vinyl ester, a C2-C12 olefin, and combinations thereof. A method may include mixing a crosslinked polymer, a catalyst, and a non-crosslinked polymer at a temperature higher than a processing temperature of the non-crosslinked polymer to form a polymer composition; wherein each of the crosslinked polymer and the non-crosslinked polymer comprise at least one monomer selected from a vinyl ester, a C2-C12 olefin, and combinations thereof, and wherein the crosslinked polymer is present in an amount that is at least 15 wt %, relative to the combined total of crosslinked polymer and non-crosslinked polymer.
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公开(公告)号：US12071491B2
公开(公告)日：2024-08-27
申请号：US17526667
申请日：2021-11-15
申请人： Braskem S.A.
发明人： Ana Paula Rodrigues Camilo , Kimberly Miller McLoughlin , Marcelo Farah , Regina Funck Nonemacher , Ana Paula de Azeredo
IPC分类号： C08F10/02 , B29C48/40 , C08J3/18 , C08K5/098 , C08K5/14 , C08K5/32 , C08L23/12 , C08L23/16 , C08L23/30 , C09J123/30 , B29L31/00
CPC分类号： C08F10/02 , B29C48/40 , C08J3/18 , C08K5/098 , C08K5/14 , C08K5/32 , C08L23/12 , C08L23/16 , C08L23/30 , C09J123/30 , B29L2031/726 , C08F2810/10 , C08J2323/30 , C08L2203/30 , C08L2207/20
摘要： A method for producing a low viscosity polyethylene-based composition comprising melting a polyethylene-based composition; decreasing a viscosity of the polyethylene-based composition; and optionally, repeating the melting and the viscosity decreasing steps to form a low viscosity polyethylene-based composition; wherein the melting and viscosity decreasing steps are performed in a continuous process at temperature that is equal to or greater than 350° C., residence time of less than 2 min and the polyethylene-based composition is in the presence of at least one free radical generator.
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公开(公告)号：US20230072372A1
公开(公告)日：2023-03-09
申请号：US17901677
申请日：2022-09-01
申请人： Braskem S.A.
发明人： Murilo Lauer Sanson , Kimberly Miller McLoughlin , Hadi Mohammadi , Nei Sebastião Domingues Junior , Ana Paula de Azeredo , Michelle Kay Sing , Gisele Marschner Rasia , Cristiane Jaqueline Mauss , Carmem Rosane Isse Gomes , Karin Janete Stein Brito , Patrícia Cofferri
IPC分类号： C08J3/24
摘要： A polymeric composition may include a thermoplastic polymer including: at least one monomer selected from the group consisting of vinyl esters, C2-C12 olefins, and combinations thereof; and a dynamic crosslinking group; and a dynamic crosslinking system to dynamically crosslink the thermoplastic polymer.
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公开(公告)号：US20230078331A1
公开(公告)日：2023-03-16
申请号：US17901691
申请日：2022-09-01
申请人： Braskem S.A.
发明人： Murilo Lauer Sanson , Kimberly Miller McLoughlin , Hadi Mohammadi , Nei Sebastião Domingues Junior , Ana Paula de Azeredo , Michelle Kay Sing
摘要： A polymeric composition may include a thermoplastic polymer including: at least one monomer selected from the group consisting of vinyl esters, C2-C12 olefins, and combinations thereof; and a dynamic crosslinking group; and a crosslinking agent to dynamically crosslink the thermoplastic polymer by ionic bonds or metal-ligand interaction.
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公开(公告)号：US20220153976A1
公开(公告)日：2022-05-19
申请号：US17526593
申请日：2021-11-15
申请人： Braskem S.A.
发明人： Ana Paula Rodrigues Camilo , Kimberly Miller McLoughlin , Marcelo Farah , Regina Funck Nonemacher , Ana Paula de Azeredo
摘要： A method for producing a low viscosity polypropylene composition may include melting a polypropylene-based composition; reducing a viscosity of the polypropylene-based composition; and optionally, repeating the melting and the reducing steps to form a low melt viscosity polypropylene-based composition; wherein the melting and viscosity decreasing steps are performed in the presence of at least one free radical generator and at least one pro-degradant stearate.
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公开(公告)号：US20220153883A1
公开(公告)日：2022-05-19
申请号：US17526667
申请日：2021-11-15
申请人： Braskem S.A.
发明人： Ana Paula Rodrigues Camilo , Kimberly Miller McLoughlin , Marcelo Farah , Regina Funck Nonemacher , Ana Paula de Azeredo
IPC分类号： C08F10/02 , C08L23/30 , C08J3/18 , C09J123/30
摘要： A method for producing a low viscosity polyethylene-based composition comprising melting a polyethylene-based composition; decreasing a viscosity of the polyethylene-based composition; and optionally, repeating the melting and the viscosity decreasing steps to form a low viscosity polyethylene-based composition; wherein the melting and viscosity decreasing steps are performed in a continuous process at temperature that is equal to or greater than 350° C., residence time of less than 2 min and the polyethylene-based composition is in the presence of at least one free radical generator.
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