Patents by Inventor Kunwu Du
Kunwu Du 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).
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Patent number: 9951257Abstract: An epoxy caulking adhesive, including: a component A and a component B. The component A at least includes the following components in parts by weight: between 50 and 100 parts of an epoxy resin, between 0 and 100 part(s) of an inorganic filler, between 0 and 20 part(s) of a thickener. The component B at least includes the following components in parts by weight: between 20 and 100 parts of an amine curing agent, between 0 and 150 part(s) of the inorganic filler, and between 0 and 25 part(s) of the thickener. The weight ratio of the component A to the component B is between 1:1 and 10:1. At least one of the inorganic filler and the thickener exists in both the component A and the component B.Type: GrantFiled: November 30, 2015Date of Patent: April 24, 2018Assignee: WUHAN KEDA MARBLE PROTECTIVE MATERIALS CO., LTD.Inventors: Kunwen Du, Kunwu Du, Qiong Lei, Yunfei Wang
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Patent number: 9453085Abstract: An initiator composition, including at least two compounds represented by the chemical formula R—CO—O—O—CO—R and a compound represented by R1—O—O—R2, where R represents a C2-C12 alkyl or a C6-C10 aryl or substituted aryl, and R1 and R2 independently, at each occurrence, represent a C1-C10 alkyl or a C6-C10 aryl.Type: GrantFiled: September 21, 2014Date of Patent: September 27, 2016Assignee: WUHAN KEDA MARBLE PROTECTIVE MATERIALS CO., LTD.Inventors: Kunwen Du, Kunwu Du, Guofeng Qiu, Panfeng Mao, Liya Wang
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Patent number: 9371433Abstract: An additive for a marble adhesive is disclosed. The additive is selected from the group consisting of R—(C6H4)—CH2OH, R—O—(CH2)2—O—(CH2)2—OH, R—O—CH2—CH(OH)—CH3, R—O—(CH2)2—OH, and a mixture thereof, where R represents hydrogen or alkyl.Type: GrantFiled: August 26, 2013Date of Patent: June 21, 2016Assignee: WUHAN KEDA MARBLE PROTECTIVE MATERIALS CO., LTD.Inventors: Kunwen Du, Kunwu Du
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Patent number: 9334362Abstract: An initiator composition, including: at least two compounds represented by the chemical formula of R—CO—O—O—CO—R and a compound represented by the chemical formula of R1—CO—O—O—R2, where R represents a C2-C12 alkyl or a C6-C10 aryl or substituted aryl, R1 represents a C1-C10 alkyl or a C6-C10 aryl, and R2 represents a C1-C10 alkyl.Type: GrantFiled: September 24, 2014Date of Patent: May 10, 2016Assignee: WUHAN KEDA MARBLE PROTECTIVE MATERIALS CO., LTD.Inventors: Kunwen Du, Kunwu Du, Guofeng Qiu, Panfeng Mao, Liya Wang
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Publication number: 20160083632Abstract: An epoxy caulking adhesive, including: a component A and a component B. The component A at least includes the following components in parts by weight: between 50 and 100 parts of an epoxy resin, between 0 and 100 part(s) of an inorganic filler, between 0 and 20 part(s) of a thickener. The component B at least includes the following components in parts by weight: between 20 and 100 parts of an amine curing agent, between 0 and 150 part(s) of the inorganic filler, and between 0 and 25 part(s) of the thickener. The weight ratio of the component A to the component B is between 1:1 and 10:1. At least one of the inorganic filler and the thickener exists in both the component A and the component B.Type: ApplicationFiled: November 30, 2015Publication date: March 24, 2016Inventors: Kunwen DU, Kunwu DU, Qiong LEI, Yunfei WANG
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Patent number: 9062234Abstract: An adhesive including at least 100 weight parts of an unsaturated polyester resin suitable for air-drying, between 0 and 5 weight parts of hydrogenated castor oil, between 1 and 20 weight parts of a nano powder, between 10 and 250 weight parts of a filler, and between 1 and 15 weight parts of an anti-shrinking agent.Type: GrantFiled: August 6, 2012Date of Patent: June 23, 2015Assignee: WUHAN KEDA MARBLE PROTECTIVE MATERIALS CO., LTD.Inventors: Kunwen Du, Kunwu Du
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Patent number: 8937115Abstract: An adhesive for filling gaps between stones, the adhesive including at least 100 weight parts of an unsaturated polyester resin suitable for air-drying, between 1 and 5 weight parts of hydrogenated castor oil, between 10 and 250 weight parts of a filler, and between 1 and 15 weight parts of an anti-shrinking agent. The adhesive has good permeability and shrinkage resistance, and high brightness after being polished.Type: GrantFiled: July 7, 2011Date of Patent: January 20, 2015Assignee: Wuhan Keda Marble Protective Materials Co., Ltd.Inventors: Kunwen Du, Ziqiang Xin, Kunwu Du
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Publication number: 20150011713Abstract: An initiator composition, including: at least two compounds represented by the chemical formula of R—CO—O—O—CO—R and a compound represented by the chemical formula of R1—CO—O—O—R2, where R represents a C2-C12 alkyl or a C6-C10 aryl or substituted aryl, R1 represents a C1-C10 alkyl or a C6-C10 aryl, and R2 represents a C1-C10 alkyl.Type: ApplicationFiled: September 24, 2014Publication date: January 8, 2015Inventors: Kunwen DU, Kunwu DU, Guofeng QIU, Panfeng MAO, Liya WANG
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Publication number: 20150008365Abstract: An initiator composition, including at least two compounds represented by the chemical formula R—CO—O—O—CO—R and a compound represented by R1—O—O—R2, where R represents a C2-C12 alkyl or a C6-C10 aryl or substituted aryl, and R1 and R2 independently, at each occurrence, represent a C1-C10 alkyl or a C6-C10 aryl.Type: ApplicationFiled: September 21, 2014Publication date: January 8, 2015Inventors: Kunwen DU, Kunwu DU, Guofeng QIU, Panfeng MAO, Liya WANG
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Patent number: 8674003Abstract: An adhesive, including: at least 100 weight parts of an unsaturated polyester resin suitable for air-drying, between 0 and 5 weight parts of hydrogenated castor oil, between 1 and 20 weight parts of nano powder, between 0 and 100 weight parts of a filler, and between 1 and 15 weight parts of an anti-shrinking agent.Type: GrantFiled: August 6, 2012Date of Patent: March 18, 2014Assignee: Wuhan Keda Marble Protective Materials Co., Ltd.Inventors: Kunwen Du, Kunwu Du
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Publication number: 20130338285Abstract: An additive for a marble adhesive, including R—(C6H4)—CH3OH, R—O—(CH2)2—O—(CH2)2—OH, R—O—CH2—CH(OH)—CH3, R-O-(CH2)2-OH, or a mixture thereof, where R represents hydrogen or an alkane.Type: ApplicationFiled: August 26, 2013Publication date: December 19, 2013Applicant: WUHAN KEDA MARBLE PROTECTIVE MATERIALS CO., LTD.Inventors: Kunwen DU, Kunwu DU
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Patent number: 8436082Abstract: An adhesive for filling in gaps between stones, the adhesive including at least 100 weight parts of an unsaturated polyester resin suitable for air-drying, between 1 and 5 weight parts of hydrogenated castor oil, between 0 and 60 weight parts of micron silica, and between 1 and 15 weight parts of an anti-shrinking agent. The adhesive overcomes the disadvantages of conventional marble glue, such as, poor air-drying property, poor shrinkage resistance, and poor permeability. The adhesive of the invention has good permeability, strong shrinkage resistance, and high brightness after being polished, and is not sticky after curing. The invention solves the difficulty of gap-filling of stone by providing a new category of marble glue.Type: GrantFiled: July 8, 2011Date of Patent: May 7, 2013Inventors: Kunwen Du, Ziqiang Xin, Kunwu Du
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Publication number: 20120302686Abstract: An adhesive including at least 100 weight parts of an unsaturated polyester resin suitable for air-drying, between 0 and 5 weight parts of hydrogenated castor oil, between 1 and 20 weight parts of a nano powder, between 10 and 250 weight parts of a filler, and between 1 and 15 weight parts of an anti-shrinking agent.Type: ApplicationFiled: August 6, 2012Publication date: November 29, 2012Inventors: Kunwen DU, Kunwu DU
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Publication number: 20120302687Abstract: An adhesive, including: at least 100 weight parts of an unsaturated polyester resin suitable for air-drying, between 0 and 5 weight parts of hydrogenated castor oil, between 1 and 20 weight parts of nano powder, between 0 and 100 weight parts of a filler, and between 1 and 15 weight parts of an anti-shrinking agent.Type: ApplicationFiled: August 6, 2012Publication date: November 29, 2012Inventors: Kunwen DU, Kunwu DU
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Publication number: 20110301263Abstract: An adhesive for filling in gaps between stones, the adhesive including at least 100 weight parts of an unsaturated polyester resin suitable for air-drying, between 1 and 5 weight parts of hydrogenated castor oil, between 0 and 60 weight parts of micron silica, and between 1 and 15 weight parts of an anti-shrinking agent. The adhesive overcomes the disadvantages of conventional marble glue, such as, poor air-drying property, poor shrinkage resistance, and poor permeability. The adhesive of the invention has good permeability, strong shrinkage resistance, and high brightness after being polished, and is not sticky after curing. The invention solves the difficulty of gap-filling of stone by providing a new category of marble glue.Type: ApplicationFiled: July 8, 2011Publication date: December 8, 2011Inventors: Kunwen DU, Ziqiang XIN, Kunwu DU
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Publication number: 20110263771Abstract: An adhesive for filling gaps between stones, the adhesive including at least 100 weight parts of an unsaturated polyester resin suitable for air-drying, between 1 and 5 weight parts of hydrogenated castor oil, between 10 and 250 weight parts of a filler, and between 1 and 15 weight parts of an anti-shrinking agent. The adhesive has good permeability and shrinkage resistance, and high brightness after being polished.Type: ApplicationFiled: July 7, 2011Publication date: October 27, 2011Inventors: Kunwen DU, Ziqiang XIN, Kunwu DU
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Patent number: D623514Type: GrantFiled: November 25, 2009Date of Patent: September 14, 2010Inventors: Kunwen Du, Ziqiang Xin, Kunwu Du