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1.发明申请
公开(公告)号：WO2022150535A1
公开(公告)日：2022-07-14
申请号：PCT/US2022/011528
申请日：2022-01-07
Inventor： RABNAWAZ, Muhammad , KANSAL, Dhwani
Abstract: The disclosure relates to a method for sealing a cellulosic article in which a sealing solution is applied to one or more cellulosic substrates to form a seal between surfaces thereof. The sealing solution generally includes water, starch, a solid polyol plasticizer, and optionally a liquid polyol plasticizer. Coated surfaces of the cellulosic substrate(s) are then contacted under sufficient conditions to form the seal therebetween, for example after drying and/or with sufficient contact time, contact pressure, contact temperature, etc. The disclosure further relates to a corresponding sealed cellulosic article, for example as formed by the sealing method. The disclosure further relates to a method for recycling in which the sealed cellulosic article is re-pulped, with or without recovery of sealing composition components, then formed into a recycled cellulosic substrate.
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2.发明申请
公开(公告)号：WO2021127229A1
公开(公告)日：2021-06-24
申请号：PCT/US2020/065687
申请日：2020-12-17
Inventor： RABNAWAZ, Muhammad , NAVEED, Muhammad
IPC: C09D129/00 , C09D163/00 , C09D175/04
Abstract: The disclosure relates to a thermoset omniphobic composition with favorable dirt repellency and water resistance properties. The composition can be used as a protective coating on a substrate. Such coatings, when contacted with soil, dirt, dust, etc., remain clean and transparent. The omniphobic composition generally includes a thermoset polymer, an omniphobic polymer, and a filler or nanofiller. The thermoset polymer can be a crosslinked acrylate or other vinyl polymer. The omniphobic polymer can include fluorocarbon and/or siloxane groups for improving water resistance. The nanofiller can include nanosilica and/or nanoclay. The thermoset polymer and the omniphobic polymer together form a matrix for the filler as a dispersed phase throughout the matrix. A coated substrate with the thermoset omniphobic composition thereon exhibits favorable water contact and sliding angles as well as favorable transparency values in dirt accumulation tests.
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公开(公告)号：WO2023059623A1
公开(公告)日：2023-04-13
申请号：PCT/US2022/045657
申请日：2022-10-04
Inventor： RABNAWAZ, Muhammad , KHAN, Ajmir , KUMAR, Vikash
Abstract: The disclosure relates to a method for depolymerizing a substituted vinyl polymer, such as polystyrene. The method can form part of a chemical recycling process to depolymerize a vinyl polymer feed into desired monomers or oligomers, which can then be used to re-polymerize and re-form new polymer materials. The method includes heating a mixture of a vinyl polymer having a pendant aromatic or ester group and a metal or carbon¬ carbon network catalyst. The heating is performed at a temperature above a melting temperature of the vinyl polymer, but low enough such that the catalyst is in solid form in the mixture. The product resulting from depolymerization and heating can include one or both of a corresponding monomer product and a corresponding oligomer product from the original vinyl polymer.
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4.发明申请
公开(公告)号：WO2022178377A1
公开(公告)日：2022-08-25
申请号：PCT/US2022/017206
申请日：2022-02-22
Inventor： RABNAWAZ, Muhammad , NAVEED, Muhammad
Abstract: The disclosure relates to the functionalization of a carbon-carbon backbone (CCB) polymer using a (cyclic) grafting agent, an initiator, and optionally a reversible radical trapping agent. The grafting agent and/or initiator can be particularly selected in terms of their surface energy and/or half-life, respectively, to limit or control undesirable effects associated with reactive melt-processing, such as excessive crosslinking, chain scission, or grafting agent homopolymerization, as well as to improve or control desirable effects associated with reactive melt-processing, such as improved relative graft uniformity or homogeneity on the CCB polymer. In some cases, the grafting agent can further include a functional group to impart some additional or new chemical or physical property to the CCB polymer. In some cases, the reactively melt-processed mixture includes two or more different polymers that are compatibilized via the grafting agent.
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公开(公告)号：WO2022015782A1
公开(公告)日：2022-01-20
申请号：PCT/US2021/041514
申请日：2021-07-14
Inventor： RABNAWAZ, Muhammad
Abstract: The disclosure relates to a recyclable polyester composition including a polyester, an epoxide compound, and optionally a capping agent. The epoxide compound can be a sterically hindered epoxide and/or a polyfunctional epoxide. The capping agent can be selected and included based on its ability to react with in situ-generated hydroxy groups resulting from reaction with the polyester and the epoxide compound. The capping agent is included when the epoxide compound is a polyfunctional epoxide in order to control or limit branching during chain extension. The inclusion of the epoxide compound provides a controlled chain extension of the polyester subjected to thermal processing in a way that controls, limits, or prevents branching and crosslinking, but which also increases polymer molecular weight in a manner that offsets the molecular weight reduction associated with thermal processing in the absence of the disclosed epoxide compounds.
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Patent Agency Ranking6.发明申请
公开(公告)号：WO2020142578A1
公开(公告)日：2020-07-09
申请号：PCT/US2020/012011
申请日：2020-01-02
Inventor： RABNAWAZ, Muhammad , KHAN, Ajmir , HUANG, Kun
IPC: C08J3/24
Abstract: The disclosure relates to a self-healing omniphobic composition including a self-healing omniphobic polymer with a crosslinked backbone. The crosslinked backbone includes a reaction product between a polyisocyanate, a functionalized omniphobic polymer reactive therewith, a reversible polyfunctional linker including a hindered secondary amino group and/or an aromatic hydroxy group, and one or more polymeric backbone components. The crosslinked backbone includes reversible urea or reversible urethane bonds between the reversible polyfunctional linker and the polyisocyanate, which in turn provide self-healing properties to the omniphobic composition. The self-healing omniphobic composition has favorable omniphobic properties, for example as characterized by water and/or oil contact and/or sliding angles. The omniphobic composition can be used as a coating on any of a variety of substrates to provide self-healing omniphobic properties to a surface of the substrate. Such self-healing omniphobic coatings can be scratch resistant, ink/paint resistant, and optically clear.
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公开(公告)号：WO2021007125A1
公开(公告)日：2021-01-14
申请号：PCT/US2020/040811
申请日：2020-07-03
Inventor： RABNAWAZ, Muhammad , NAVEED, Muhammad
IPC: C09D129/00 , C09D163/00 , C09D175/04
Abstract: The disclosure generally relates to omniphobic compatibilizers, which include a polymerization reaction product between a first vinyl monomer, optionally a second vinyl crosslinking monomer, and a functionalized omniphobic polymer. The functionalized omniphobic polymer can include two or more vinyl functional groups or at least one free radical initiator functional group such that the reaction product forming the omniphobic compatibilizer can be a vinyl or free-radical polymerization product. The omniphobic compatibilizer can be incorporated into a UV-curable or a non-UV-curable thermoset omniphobic composition. The UV-curable composition can be a crosslinked polymerization reaction product between the omniphobic compatibilizer, a third vinyl monomer, and a fourth polyvinyl crosslinking monomer. The non-UV-curable composition can be a crosslinked polymerization reaction product between the omniphobic compatibilizer, a first thermosetting component, and a second thermosetting component. The thermoset omniphobic composition can be a coating on a substrate in a corresponding coated article.
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公开(公告)号：WO2020180760A1
公开(公告)日：2020-09-10
申请号：PCT/US2020/020592
申请日：2020-03-02
Inventor： RABNAWAZ, Muhammad
IPC: C08L75/04 , C08G18/72 , C08J3/24 , C09D175/04 , C09D175/08 , C08G18/32
Abstract: The disclosure relates to a thermoset omniphobic composition, which includes a thermoset polymer with first, second, and third backbone segments, first urethane groups linking the first and third backbone segments, and second urethane groups linking the first and second backbone segments. The first, second, and third backbone segments generally correspond to urethane reaction products of polyisocyanate(s), hydroxy-functional hydrophobic polymer(s), and polyol(s), respectively. The thermoset omniphobic composition has favorable omniphobic properties, for example as characterized by water and/or oil contact and/or sliding angles. The thermoset omniphobic composition can be used as a coating on any of a variety of substrates to provide omniphobic properties to a surface of the substrate. Such omniphobic coatings can be scratch-resistant, ink/paint resistant, dirt- repellent, and optically clear. The thermoset omniphobic composition can be applied by different coating methods including cast, spin, roll, spray and dip coating methods.
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公开(公告)号：WO2020041409A1
公开(公告)日：2020-02-27
申请号：PCT/US2019/047409
申请日：2019-08-21
Inventor： RABNAWAZ, Muhammad , LI, Zhao
IPC: C09D183/10 , C08G77/38 , C08G77/42
Abstract: The disclosure relates to omniphobic coatings, related articles including such coatings, and related method for forming such coatings or articles, for example biobased and/or biodegradable omniphobic coatings. The omniphobic coating includes a reaction product between an amino-functional polymer and an amino-reactive functionalized omniphobic polymer having a glass transition temperature (T g ) of 60°C or less. The omniphobic coating has a weight ratio of amino-functional polymer relative to functionalized omniphobic polymer of at least 1 or 2. A corresponding omniphobic coated article can include the omniphobic coating on a porous substrate such as a cellulosic or paper substrate, for example to provide a water- and oil/fat/grease-resistant coating for a paper- based product. The omniphobic coating can be formed in a reaction medium before being applied to the substrate, or the omniphobic coating can be formed on the substrate with serial application of the amino-reactive functionalized omniphobic polymer and the amino- functional polymer thereon. This disclosure provides a closed loop circular economy approach for fluorine-free, water- and grease-resistant paper as the coating can be easily separated from the pulp/fiber of the paper. The recycled pulp can be used for paper making, while the separated coating in micelle form can be used for recoating.
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公开(公告)号：WO2019099608A1
公开(公告)日：2019-05-23
申请号：PCT/US2018/061189
申请日：2018-11-15
Inventor： RABNAWAZ, Muhammad , KHAN, Fahad , UDDIN, Nazim
IPC: C08J3/24
CPC classification number: C08G18/7831 , C08G18/00 , C08G18/2063 , C08G18/2081 , C08G18/244 , C08G18/3206 , C08G18/4009 , C08G18/4063 , C08G18/4829 , C08G18/61 , C08G18/6216 , C08G18/6517 , C08G18/71 , C08G18/73 , C08G18/75 , C08G18/76 , C08G18/773 , C08G18/792 , C09D175/04
Abstract: The disclosure relates to a thermoset omniphobic composition, which includes a thermoset polymer with first, second, and third backbone segments, urethane groups linking the first and third backbone segments, and urea groups linking the first and second backbone segments. The first, second, and third backbone segments generally correspond to urethane or urea reaction products of polyisocyanate(s), amine-functional hydrophobic polymer(s), and polyol(s), respectively. The thermoset omniphobic composition has favorable omniphobic properties, for example as characterized by water and/or oil contact and/or sliding angles. The thermoset omniphobic composition can be used as a coating on any of a variety of substrates to provide omniphobic properties to a surface of the substrate. Such omniphobic coatings can be scratch resistant, ink/paint resistant, dirt-repellent, and optically clear. The thermoset omniphobic composition can be applied by different coating methods including cast, spin, roll, spray and dip coating methods.
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