Patents by Inventor Keuw Wei LIM
Keuw Wei LIM 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).
-
Patent number: 11725097Abstract: An accelerator-free elastomeric formulation comprising base polymers, crosslinkers, stabilizers, an activator, an antioxidant, a pigment, a wax, an antifoam and a pH adjuster. A method of preparing an accelerator-free elastomeric formulation, comprising the steps of mixing Base polymer A with Crosslinker A to produce mixture A, adding while stirring Stabilizer A, Crosslinker B, an activator, an antioxidant, a pigment, a wax and an antifoam one after another with no particular order and followed by a pH adjuster into the mixture A to produce mixture B, adding Base polymer B and Stabilizer B one after another with no particular order into the mixture B to produce an accelerator-free elastomeric formulation and allowing the accelerator-free elastomeric formulation to mature.Type: GrantFiled: April 23, 2020Date of Patent: August 15, 2023Inventors: Chong Ban Wong, Keuw Wei Lim, Siew Szen Ling, Siti Ayuni Hamka
-
Patent number: 11667771Abstract: An elastomeric formulation comprising elastomers, accelerator, antifoaming agent, antioxidant, crosslinker, colouring agent, surfactant, filler, pH adjuster and dispersing medium, wherein the elastomeric formulation has a total solid content ranging between 5% by weight to 40% by weight.Type: GrantFiled: September 28, 2020Date of Patent: June 6, 2023Assignee: TOP GLOVE INTERNATIONAL SDN. BHD.Inventors: Chong Ban Wong, Keuw Wei Lim, Chee Yang Teh, Chun Fah Mok
-
Patent number: 11649349Abstract: A thermoplastic elastomeric formulation comprises (i) a water based thermoplastic elastomer (TPE), (ii) a surfactant, (iii) an antioxidant, (iv) a antifoaming agent and (v) a crosslinking agent. The water based TPE is styrene-isoprene-styrene (SIS) copolymer latex. A glove that is produced using the thermoplastic elastomeric formulation of the present invention is known as water based TPE gloves, such as water based TPE medical exam gloves, water based TPE household gloves and water based TPE industrial gloves in particular water based TPE surgical gloves.Type: GrantFiled: October 14, 2020Date of Patent: May 16, 2023Inventors: Chong Ban Wong, Keuw Wei Lim, Arman Sikirman, Chee Kin Phang, Nurjihan Sadon
-
Patent number: 11470897Abstract: A semi transparent nitrile glove comprising nitrile latex, caustic alkali, accelerators, vulcanizing agents, stabilizer and antifoaming agent, wherein the nitrile latex is any one selected from either acrylonitrile butadiene copolymer or carboxylated acrylonitrile butadiene copolymer, wherein the caustic alkali is a combination of either potassium hydroxide and ammonia or sodium hydroxide and ammonia, wherein the accelerators are chemical compounds of dithiocarbamates, wherein the vulcanizing agents are selected from both ionic and covalent vulcanizing agents, wherein the stabilizer is any one of either sodium dodecylbenzene sulfonate or sodium dodecyl sulfate and wherein the antifoaming agent is any one from a group consisting of silicone based antifoam, non-silicone based antifoam, oil based antifoam and water based antifoam wherein the semi transparent glove is without pigment and without titanium dioxide.Type: GrantFiled: December 19, 2018Date of Patent: October 18, 2022Assignee: Top Glove International SDN. BHD.Inventors: Chong Ban Wong, Keuw Wei Lim, Kien Ben Liew, Chee Kin Phang
-
Publication number: 20210195897Abstract: The present invention relates to an antimicrobial coagulant solution, wherein the antimicrobial coagulant solution is a mixture of an antimicrobial additive and a coagulant solution. The antimicrobial additive formulation comprises (i) natural ingredient, (ii) organic acid and (iii) water. The coagulant solution comprises (i) coagulating agent, (ii) antitack agent, (iii) wetting agent, (iv) pH adjuster and (v) solvent. Further, present invention discloses an antimicrobial elastomeric article comprising antimicrobial coating that is prepared from the antimicrobial coagulant solution. The antimicrobial elastomeric article is an antimicrobial glove.Type: ApplicationFiled: December 23, 2020Publication date: July 1, 2021Inventors: CHONG BAN WONG, KEUW WEI LIM, DEVI SHANTINI P.CHANDRASAKARAN
-
Publication number: 20210169160Abstract: A semi transparent nitrile glove comprising nitrile latex, caustic alkali accelerators, vulcanizing agents, stabilizer and antifoaming agent, wherein the nitrile latex is any one selected from either acrylonitrile butadiene copolymer or carboxylated acrylonitrile butadiene copolymer, wherein the caustic alkali is a combination of either potassium hydroxide and ammonia or sodium hydroxide and ammonia, wherein the accelerators are chemical compounds of dithiocarbamates, wherein the vulcanizing agents are selected from both ionic and covalent vulcanizing agents, wherein the stabilizer is any one of either sodium dodecylbenzene sulfonate or sodium dodecyl sulfate and wherein the antifoaming agent is any one from a group consisting of silicone based antifoam, non-silicone based antifoam, oil based antifoam and water based antifoam wherein the semi transparent glove is without pigment and without titanium dioxide.Type: ApplicationFiled: December 19, 2018Publication date: June 10, 2021Applicant: TOP GLOVE INTERNATIONAL SDN. BHDInventors: Chong Ban WONG, Keuw Wei LIM, Kien Ben LiEW, Chee Kin PHANG
-
Publication number: 20210122913Abstract: A thermoplastic elastomeric formulation comprises (i) a water based thermoplastic elastomer (TPE), (ii) a surfactant, (iii) an antioxidant, (iv) a antifoaming agent and (v) a crosslinking agent. The water based TPE is styrene-isoprene-styrene (SIS) copolymer latex. A glove that is produced using the thermoplastic elastomeric formulation of the present invention is known as water based TPE gloves, such as water based TPE medical exam gloves, water based TPE household gloves and water based TPE industrial gloves in particular water based TPE surgical gloves.Type: ApplicationFiled: October 14, 2020Publication date: April 29, 2021Inventors: Chong Ban WONG, Keuw Wei LIM, Arman SIKIRMAN, Chee Kin PHANG, Nurjihan SADON
-
Publication number: 20210095104Abstract: An elastomeric formulation comprising elastomers, accelerator, antifoaming agent, antioxidant, crosslinker, colouring agent, surfactant, filler, pH adjuster and dispersing medium, wherein the elastomeric formulation has a total solid content ranging between 5% by weight to 40% by weight.Type: ApplicationFiled: September 28, 2020Publication date: April 1, 2021Applicant: TOP GLOVE INTERNATIONAL SDN. BHD.Inventors: CHONG BAN WONG, KEUW WEI LIM, CHEE YANG TEH, CHUN FAH MOK
-
Publication number: 20200369859Abstract: An accelerator-free elastomeric formulation comprising base polymers, crosslinkers, stabilizers, an activator, an antioxidant, a pigment, a wax, an antifoam and a pH adjuster. A method of preparing an accelerator-free elastomeric formulation, comprising the steps of mixing Base polymer A with Crosslinker A to produce mixture A, adding while stirring Stabilizer A, Crosslinker B, an activator, an antioxidant, a pigment, a wax and an antifoam one after another with no particular order and followed by a pH adjuster into the mixture A to produce mixture B, adding Base polymer B and Stabilizer B one after another with no particular order into the mixture B to produce an accelerator-free elastomeric formulation and allowing the accelerator-free elastomeric formulation to mature.Type: ApplicationFiled: April 23, 2020Publication date: November 26, 2020Inventors: Chong Ban Wong, Keuw Wei Lim, Siew Szen Ling, Siti Ayuni Hamka
-
Patent number: 10793705Abstract: A latex formulation for making an elastomeric product, more particularly an elastomeric glove. The formulation comprises a mixture of at least one base polymer, a cross-linker; and a pH adjuster, where the pH adjuster provides a pH range of 9.5 to 10.5 to the latex composition. Still further, the present invention discloses a method for preparing a latex formulation for making elastomeric products, such as an elastomeric glove, without using accelerators, zinc oxide or sulphur.Type: GrantFiled: December 19, 2018Date of Patent: October 6, 2020Assignee: TOP GLOVE SDN. BHD.Inventors: Cian Ying Tung, Keuw Wei Lim, Chong Ban Wong
-
Publication number: 20190119474Abstract: A latex formulation for making an elastomeric product, more particularly an elastomeric glove. The formulation comprises a mixture of at least one base polymer, a cross-linker; and a pH adjuster, where the pH adjuster provides a pH range of 9.5 to 10.5 to the latex composition. Still further, the present invention discloses a method for preparing a latex formulation for making elastomeric products, such as an elastomeric glove, without using accelerators, zinc oxide or sulphur.Type: ApplicationFiled: December 19, 2018Publication date: April 25, 2019Inventors: Cian Ying TUNG, Keuw Wei LIM, Chong Ban WONG
-
Patent number: 10259916Abstract: A latex formulation for making elastomeric product, more particularly an elastomeric glove comprising a mixture of at least one base polymer, a cross-linker; and a pH adjuster, where the pH adjustor providing a pH range of 9.5 to 10.5. Still further, the present invention discloses a method for preparing a latex formulation for making elastomeric product, more particularly an elastomeric glove without using accelerators, zinc oxide and sulphur, which comprises the steps of mixing a base polymer with a pH adjuster, stirring the mixture for time period ranging from 20 minutes to 30 minutes, adding a cross-linker to the mixture, stirring said mixture for an hour, optionally adding at least one or more additive to said mixture, adding water to said mixture to achieve a total solid content (TSC) ranging in between 13% to 30% by w/w, allowing said mixture to mature.Type: GrantFiled: September 29, 2015Date of Patent: April 16, 2019Assignee: TOP GLOVE SDN. BHD.Inventors: Cian Ying Tung, Keuw Wei Lim, Chong Ban Wong
-
Publication number: 20170137584Abstract: A latex formulation for making elastomeric product, more particularly an elastomeric glove comprising a mixture of at least one base polymer, a cross-linker; and a pH adjustor, where the pH adjustor providing a pH range of 9.5 to 10.5. Still further, the present invention discloses a method for preparing a latex formulation for making elastomeric product, more particularly an elastomeric glove without using accelerators, zinc oxide and sulphur, which comprises the steps of mixing a base polymer with a pH adjuster, stirring the mixture for time period ranging from 20 minutes to 30 minutes, adding a cross-linker to the mixture, stirring said mixture for an hour, optionally adding at least one or more additive to said mixture, adding water to said mixture to achieve a total solid content (TSC) ranging in between 13% to 30% by w/w, allowing said mixture to mature.Type: ApplicationFiled: September 29, 2015Publication date: May 18, 2017Applicant: TOP GLOVE SDN. BHD.Inventors: Cian Ying TUNG, Keuw Wei LIM, Chong Ban WONG