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公开(公告)号：US20230212417A1
公开(公告)日：2023-07-06
申请号：US18114458
申请日：2023-02-27
Applicant: Agency for Science, Technology and Research
Inventor： Xu Li , Yu Zhang , Ming Yan Tan , Siew Yee Wong , Xi Kui Zhang
IPC: C09D133/14 , C08F2/18 , C08F2/44 , C08F292/00 , C08K3/34 , C08K5/14 , C08K5/5425 , C08K9/04 , C08F220/18
CPC classification number: C09D133/14 , C08F2/18 , C08F2/44 , C08F292/00 , C08K3/346 , C08K5/14 , C08K5/5425 , C08K9/04 , C08F220/1808 , C08F220/1806
Abstract: A method of synthesizing a clay-polyacrylate composite. An aqueous solution including clay is mixed with at least one organosilane coupling agent including an acrylate moiety to form a silanized-clay suspension. The silanized-clay suspension is contacted with a first acrylate monomer and a second acrylate monomer in an inert environment, where the first acrylate monomer and the second acrylate monomer have different solubility. A polymerization initiator is added to the silanized-clay suspension before or during the contacting of the silanized-clay suspension with the first acrylate monomer and the second acrylate monomer in the inert environment to form the clay-polyacrylate composite including the first and second acrylate monomer, where the first acrylate monomer is a hydrophilic acrylate monomer including a hydroxyl (—OH) group and the second acrylate monomer is a hydrophobic acrylate monomer which repels water.
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公开(公告)号：US20200299477A1
公开(公告)日：2020-09-24
申请号：US16892269
申请日：2020-06-03
Applicant: AGENCY FOR SCIENCE, TECHNOLOGY AND RESEARCH
Inventor： Xu LI , Yu Yuan Chieng , Siew Yee Wong , Xikui Zhang
IPC: C08J7/04 , C08F20/06 , C08F2/44 , C09D4/06 , C09D133/02
Abstract: This invention relates to a one-step process for making a polymer composite suspension for coating plastic films characterized in that a first polymer is synthesized in-situ optionally in the presence of other polymers and in the presence of clay. Preferably the polymer composite suspension comprises a) 1.0 to 11.0 wt % of clay or silane modified clay, b) 0.1 to 10.0) wt % of poly (acrylic acid), which is a copolymer of acrylic acid (AA) with at least one other monomer selected from 2-ethylhexyl acrylate (EHA), β-carboxyethyl acrylate (β-CEA), methacrylamidoethyl ethylene urea (WAM II) and ethoxylated behenyl methacrylate (β-FM), c) 1.0 to 15.0 wt % of other polymers, preferably poly (vinyl alcohol) and d) 70 to 97 wt % of water or mixture of water with 2-propanol. The coating films made from the suspensions show good barrier capabilities against water vapor and oxygen can be used to make barrier layers on or within plastic films for packaging applications. The invention also relates to methods for making silane modified clay usable in the process for making the suspensions.
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公开(公告)号：US10647860B2
公开(公告)日：2020-05-12
申请号：US14350057
申请日：2012-10-04
Applicant: Agency for Science, Technology and Research
Inventor： Xu Li , Chaobin He , Siew Yee Wong
Abstract: The present invention relates to a method for forming a layered silicate/polymer composite, the composite comprising individual exfoliated silicate layers separated in a continuous polymer matrix, wherein the polymer is a hydrophobic polymer, the method comprising: exfoliating sheet silicate in water to form a silicate suspension; replacing the water in the silicate suspension by an organic solvent to form a silicate/organic solvent suspension; contacting the silicate/organic solvent suspension with a solution of a hydrophobic polymer precursor in an organic solvent to form a silicate/polymer precursor suspension; coating the silicate/polymer precursor suspension on a substrate; removing the organic solvents; curing the hydrophobic polymer precursor of the coating of the silicate/polymer precursor; and annealing the cured coating to form the layered silicate/polymer composite on the substrate.
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公开(公告)号：US20230227688A1
公开(公告)日：2023-07-20
申请号：US18114947
申请日：2023-02-27
Applicant: Agency for Science, Technology and Research
Inventor： Xu Li , Yu Zhang , Ming Yan Tan , Siew Yee Wong , Xi Kui Zhang
IPC: C09D133/14 , C08F2/18 , C08F292/00 , C08F2/44 , C08K3/34 , C08K9/04 , C08K5/5425 , C08F220/18 , C08K5/14
CPC classification number: C09D133/14 , C08F2/18 , C08F292/00 , C08F2/44 , C08K3/346 , C08K9/04 , C08K5/5425 , C08F220/1808 , C08K5/14 , C08F220/1806
Abstract: A method of synthesizing a polymeric clay composition for coating. A clay-polyacrylate composite is produced, where the clay-polyacrylate composite includes one or more layers of clay intercalated with polyacrylate, where the one or more layers of clay include at least one organosilane coupling agent including an acrylate moiety, where the at least one organosilane coupling agent is attached to a surface of the one or more layers of clay and the polyacrylate is covalently attached to the organosilane coupling agent, and where the polyacrylate consists of a first acrylate monomer and a second acrylate monomer having different solubility, where the first acrylate monomer is a hydrophilic acrylate monomer including a hydroxyl (—OH) group and the second acrylate monomer is a hydrophobic acrylate monomer which repels water. Furthermore, the clay-polyacrylate composite is mixed with a solution including a polymer to form the polymeric clay composition.
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公开(公告)号：US11623202B2
公开(公告)日：2023-04-11
申请号：US16614191
申请日：2018-05-15
Applicant: Agency for Science, Technology and Research
Inventor： Xu Li , Chin Chong Ray Yap , Jiating He , Siew Yee Wong
Abstract: A method of forming one or more composite structures is provided wherein one or more carbon structures is formed from a carbon source via a hydrothermal process. Said carbon source is a biomass material including glucose and glucosamine hydrochloride. In particular, the method further comprises introducing a seeding additive of potassium or phosphate salt, preferably monopotassium phosphate to the carbon source. The method includes introducing iron onto the carbon structures to form the one or more composite structures including carbon and iron.
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Patent Agency Ranking
6.发明申请公开(公告)号：US20140272372A1
公开(公告)日：2014-09-18
申请号：US14350057
申请日：2012-10-04
Applicant: Agency for Science, Technology and Research
Inventor： Xu Li , Chaobin He , Siew Yee Wong
IPC: C09D7/12
CPC classification number: C09D7/61 , B82Y40/00 , C08K3/346 , C08K9/08 , C09D1/00 , C09D1/04 , Y10T428/249921
Abstract: The present invention relates to a method for forming a layered silicate/polymer composite, the composite comprising individual exfoliated silicate layers separated in a continuous polymer matrix, wherein the polymer is a hydrophobic polymer, the method comprising: exfoliating sheet silicate in water to form a silicate suspension; replacing the water in the silicate suspension by an organic solvent to form a silicate/organic solvent suspension; contacting the silicate/organic solvent suspension with a solution of a hydrophobic polymer precursor in an organic solvent to form a silicate/polymer precursor suspension; coating the silicate/polymer precursor suspension on a substrate; removing the organic solvents; curing the hydrophobic polymer precursor of the coating of the silicate/polymer precursor; and annealing the cured coating to form the layered silicate/polymer composite on the substrate.
Abstract translation: 本发明涉及一种形成层状硅酸盐/聚合物复合材料的方法，该复合材料包括在连续聚合物基体中分离的单个剥离的硅酸盐层，其中聚合物是疏水性聚合物，该方法包括：将硅酸盐在水中去角质以形成 硅酸盐悬浮液 用有机溶剂代替硅酸盐悬浮液中的水，形成硅酸盐/有机溶剂悬浮液; 使硅酸盐/有机溶剂悬浮液与疏水性聚合物前体在有机溶剂中的溶液接触以形成硅酸盐/聚合物前体悬浮液; 将硅酸盐/聚合物前体悬浮液涂覆在基材上; 去除有机溶剂; 固化硅酸盐/聚合物前体的涂层的疏水性聚合物前体; 并对固化的涂层退火以在基底上形成层状硅酸盐/聚合物复合材料。
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公开(公告)号：US11767433B2
公开(公告)日：2023-09-26
申请号：US17161647
申请日：2021-01-28
Applicant: AGENCY FOR SCIENCE, TECHNOLOGY AND RESEARCH
Inventor： Chao Chen , Xu Li , Suxi Wang , Xikui Zhang , Siew Yee Wong
IPC: C08K3/34 , C09C3/06 , C09D7/62 , C09D7/40 , C09D5/33 , C09C1/28 , C08K9/02 , C08K7/28 , C08K7/26 , C08K3/22 , C08K3/36 , C08K3/40 , C08K7/20
CPC classification number: C09C3/063 , C09C1/28 , C09D5/004 , C09D7/62 , C09D7/70 , C01P2002/72 , C01P2004/02 , C01P2004/03 , C01P2004/32 , C01P2004/61 , C01P2004/84 , C01P2006/10 , C08K3/34 , C08K3/36 , C08K3/40 , C08K7/20 , C08K7/26 , C08K7/28 , C08K9/02 , C08K2003/2241 , C08K2201/005 , C08K9/02 , C08K2003/2241
Abstract: A method of forming a titania-coated inorganic particle comprising the steps of (a) stirring a mixture of a titania precursor such as a titanium alkoxide and an inorganic particle such as a hollow glass particles in an organic solvent such as an alcohol for more than 1 h to cause adsorption of the titania precursor on the surface of the inorganic particle; and (b) adding water dropwise to the mixture under stirring to convert the titania precursor to titania which then forms a coating on the inorganic particle. A method for forming a paint formulation, a titania-coated inorganic particle, a paint formulation comprising a titania-coated inorganic particle and use of a titania-coated inorganic particle in a paint formulation is also described.
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公开(公告)号：US11597852B2
公开(公告)日：2023-03-07
申请号：US16493555
申请日：2018-03-14
Applicant: Agency for Science, Technology and Research
Inventor： Xu Li , Yu Zhang , Ming Yan Tan , Siew Yee Wong , Xi Kui Zhang
IPC: C09D133/14 , C08F292/00 , C08F2/44 , C08F2/18 , C08K5/14 , C08K5/5425 , C08K9/04 , C08K3/34 , C08F220/18
Abstract: The present disclosure relates to a clay-polyacrylate composite comprising layers of clay intercalated with polyacrylate, wherein the layers of clay comprises at least one organosilane coupling agent comprising an acrylate moiety; and wherein the polyacrylate comprises a first acrylate monomer and a second acrylate monomer having different solubility. A surfactant-free method of synthesizing the said clay-polyacrylate composite and a method for coating are also provided. In a preferred embodiment, the first acrylate monomer is a hydrophilic acrylate monomer, e.g. 2-hydroxyethyl acrylate, and the second acrylate monomer is a hydrophobic acrylate monomer, e.g. 2-ethylhexyl acrylate. The clay-acrylate composite can be used for forming a barrier coating, which exhibits low water and low oxygen permeability.
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公开(公告)号：US10941298B2
公开(公告)日：2021-03-09
申请号：US16326691
申请日：2017-08-16
Applicant: AGENCY FOR SCIENCE, TECHNOLOGY AND RESEARCH
Inventor： Chao Chen , Xu Li , Suxi Wang , Xikui Zhang , Siew Yee Wong
IPC: C08K9/02 , C09D7/62 , C09C3/06 , C09D7/40 , C09D5/33 , C09C1/28 , C08K7/28 , C08K7/26 , C08K3/34 , C08K3/22 , C08K3/36 , C08K3/40 , C08K7/20
Abstract: A method of forming a titania-coated inorganic particle comprising the steps of (a) stirring a mixture of a titania precursor such as a titanium alkoxide and an inorganic particle such as a hollow glass particles in an organic solvent such as an alcohol for more than 1 h to cause adsorption of the titania precursor on the surface of the inorganic particle; and (b) adding water dropwise to the mixture under stirring to convert the titania precursor to titania which then forms a coating on the inorganic particle. A method for forming a paint formulation, a titania-coated inorganic particle, a paint formulation comprising a titania-coated inorganic particle and use of a titania-coated inorganic particle in a paint formulation is also described.
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公开(公告)号：US10689497B2
公开(公告)日：2020-06-23
申请号：US16273075
申请日：2019-02-11
Applicant: AGENCY FOR SCIENCE, TECHNOLOGY AND RESEARCH
Inventor： Xu Li , Yu Yuan Chieng , Siew Yee Wong , Xikui Zhang
IPC: C09D133/08 , C08J7/04 , C08F20/06 , C08F2/44 , C09D4/06 , C09D133/02
Abstract: This invention relates to a a one-step process for making a polymer composite suspension for coating plastic films characterized in that a first polymer is synthesized in-situ optionally in the presence of other polymers and in the presence of clay. Preferably the polymer composite suspension comprises a) 1.0 to 11.0 wt % of clay or silane modified clay, b) 0.1 to 10.0 wt % of poly (acrylic acid), which is a copolymer of acrylic acid (AA) with at least one other monomer selected from 2-ethylhexyl acrylate (EHA), β-carboxyethyl acrylate (β-CEA), methacrylamidoethyl ethylene urea (WAM II) and ethoxylated behenyl methacrylate (β-EM), c) 1.0 to 15.0 wt % of other polymers, preferably poly (vinyl alcohol) and d) 70 to 97 wt % of water or mixture of water with 2-propanol. The coating films made from the suspensions show good barrier capabilities against water vapor and oxygen can be used to make barrier layers on or within plastic films for packaging applications. The invention also relates to methods for making silane modified clay usable in the process for making the suspensions.
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