# US 2013/0157045 A1 · Anti-fingerprint agent, surface treatment method using the anti-fingerprint agent and article manufactured by the same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2013/0157045 A1 - Document ID: US20130157045A1 - Status: Published application - Kind: A1 - Application number: 13/483,258 - Filed: 2012-05-30 - Published: 2013-06-20 - Earliest claimed: 2011-12-17 - Assignees: FIH (Hong Kong) Limited; Shenzhen Futaihong Precision Industry Co., Ltd. - Inventors: XU LIU - Web page: https://patentgrep.com/patent/US20130157045A1 ## CPC - C09D 5/1612: {Non-macromolecular compounds} - C09D 5/1662: {Synthetic film-forming substance} - C09D 7/60: non-macromolecular (C09D7/41-C09D7/48 take precedence) - C09D 127/18: Homopolymers or copolymers of tetrafluoroethene - C08K 5/5415: containing at least one Si—O bond - Y10T 428/265: 1 mil or less - Y10T 428/3154: Of fluorinated addition polymer from unsaturated monomers - C09D: COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR (cosmetics A61K; processes for applying liquids or other fluent materials to surfaces, in general, B05D; staining wood B27K5/02; glazes or vitreous enamels C03C; natural resins, French polish, drying-oils, driers, turpentine, per se, C09F; polishing compositions other than French polish, ski waxes C09G; adhesives or use of materials as adhesives C09J; materials for sealing or packing joints or covers C09K3/10; materials for stopping leaks C09K3/12; processes for the electrolytic or electrophoretic production of coatings C25D) - C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09) - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract Anti-fingerprint agent substantially comprises liquid polytetrafluroethylene and silane solution. The volume ratio of the liquid polytetrafluroethylene to silane solution is about 0.5:1 to about 0.8:1. The silane solution substantially comprises methyl triethoxysilane, ethyl silicate, absolute ethanol, deionized water, and sulfuric acid. The surface treatment method using the anti-fingerprint agent and the article manufactured by the method is also provided. ## Claims ### Claim 1 An anti-fingerprint agent, comprising: liquid polytetrafluroethylene; and silane solution, the volume ratio of the liquid polytetrafluroethylene to silane solution being about 0.5:1 to about 0.8:1, the silane solution substantially comprising methyl triethoxyl silane, ethyl silicate, absolute ethanol, deionized water, and sulfuric acid solution. ### Claim 2 (depends on 1) The anti-fingerprint agent as claimed in claim 1, wherein volume percentage of the methyl triethoxyl silane is about 60% to about 63%. ### Claim 3 (depends on 1) The anti-fingerprint agent as claimed in claim 1, wherein volume percentage of the ethyl silicate is about 2% to about 3%. ### Claim 4 (depends on 1) The anti-fingerprint agent as claimed in claim 1, wherein volume percentage of the absolute ethanol is about 2% to about 3%. ### Claim 5 (depends on 1) The anti-fingerprint agent as claimed in claim 1, wherein volume percentage of the deionized water is about 25% to about 27%. ### Claim 6 (depends on 1) The anti-fingerprint agent as claimed in claim 1, wherein volume percentage of the sulfuric acid solution is about 4% to about 11%. ### Claim 7 (depends on 6) The anti-fingerprint agent as claimed in claim 6, wherein the sulfuric acid solution added in the silane solution is 45% sulfuric acid by mass. ### Claim 8 A surface treatment method using an anti-fingerprint agent comprising: providing a substrate, the substrate being made of metal or non-metal; providing an anti-fingerprint agent, the anti-fingerprint agent substantially comprising liquid polytetrafluroethylene and silane solution, the volume ratio of the liquid polytetrafluroethylene to silane solution being about 0.5:1 to about 0.8:1, the silane solution substantially comprising methyl triethoxyl silane, ethyl silicate, absolute ethanol, deionized water, and sulfuric acid solution; forming an anti-fingerprint coating on the substrate by a dipping process. ### Claim 9 (depends on 8) The surface treatment method as claimed in claim 8, wherein volume percentage of the methyl triethoxyl silane is about 60% to about 63%. ### Claim 10 (depends on 8) The surface treatment method as claimed in claim 8, wherein volume percentage of the ethyl silicate is about 2% to about 3%. ### Claim 11 (depends on 8) The surface treatment method as claimed in claim 8, wherein volume percentage of the absolute ethanol is about 2% to about 3%. ### Claim 12 (depends on 8) The surface treatment as claimed in claim 8, wherein volume percentage of the deionized water is about 25% to about 27%. ### Claim 13 (depends on 8) The surface treatment method as claimed in claim 8, wherein volume percentage of the sulfuric acid solution is about 4% to about 11%. ### Claim 14 (depends on 8) The surface treatment method as claimed in claim 8, wherein the anti-fingerprint agent is manufactured by the following steps: silane solution and liquid polytetrafluroethylene are mixed and stirred to produce a mixture, the volume ratio of liquid polytetrafluroethylene to silane solution is about 0.5:1 to about 0.8:1; the mixture is statically placed for about 30 minutes to about 40 minutes; then, the mixture is filtered to remove impurities to produce the anti-fingerprint agent. ### Claim 15 (depends on 8) The surface treatment method as claimed in claim 8, wherein the anti-fingerprint coating is formed by the following steps: the substrate is immersed in the anti-fingerprint agent for about 20 s to about 30 s, then the substrate is baked at an oven temperature of about 150° C. to about 200° C. ### Claim 16 An article, comprising: a substrate; and an anti-fingerprint coating formed on the substrate, anti-fingerprint agent being used to form the anti-fingerprint coating substantially comprising liquid polytetrafluroethylene and silane solution, the volume ratio of the liquid polytetrafluroethylene to silane solution being about 0.5:1 to about 0.8:1, the silane solution substantially comprising methyl triethoxyl silane, ethyl silicate, absolute ethanol, deionized water, and sulfuric acid solution. ### Claim 17 (depends on 16) The article as claimed in claim 16, wherein the substrate is a metal substrate, a metal substrate coated with metal compound layer or metal layer, or a non-metal substrate coated with metal compound layer or metal layer. ### Claim 18 (depends on 17) The article as claimed in claim 17, wherein the metal compound is a compound formed from at least one metal element and at least one non-metal element, wherein the metal element is selected from a group consisting of Al, Ti, Cr, Mg, Zr and Ni, the non-metal element is selected from a group consisting of O, C, N and P. ### Claim 19 (depends on 17) The article as claimed in claim 17, wherein the metal layer is made of one or more metal elements selected from a group consisting of Al, Ti, Cr, Mg, Zr and Ni. ### Claim 20 (depends on 16) The article as claimed in claim 16, wherein the anti-fingerprint coating has a thickness of about 5 μm to about 10 μm.