# US 2021/0274873 A1 · Silica gel / resilient eyelash stem structure and artificial eyelash having the same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0274873 A1 - Document ID: US20210274873A1 - Status: Published application - Kind: A1 - Application number: 16/810,794 - Filed: 2020-03-05 - Published: 2021-09-09 - Earliest claimed: 2020-03-05 - Inventors: Mingtao ZHANG - Web page: https://patentgrep.com/patent/US20210274873A1 ## CPC - A41G 5/02: Artificial eyelashes; Artificial eyebrows - C08G 77/12: containing silicon bound to hydrogen - C08G 77/20: containing silicon bound to unsaturated aliphatic groups - C08L 83/04: Polysiloxanes - A41G: ARTIFICIAL FLOWERS; WIGS; MASKS; FEATHERS - C08G: MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS - C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06) ## Abstract The present invention discloses a silica gel/resilient eyelash stem structure and artificial eyelash having the same. The silica gel/resilient eyelash stem structure is integrally formed by enclosing root portions of eyelash strands to be adhered by an adhesive; ingredients for preparing the adhesive comprises the following components in parts by weight: 70-80 parts of a silica gel base, 15-20 parts of a filler, 4-6 parts of a cross-linking agent, 0.2-0.4 parts of a catalytic agent, 0.02-0.05 parts of an inhibiting agent. The silica gel/resilient eyelash stem structure is integrally formed by enclosing root portions of eyelash strands by an adhesive which is made of multi-component silica gel material. The silica gel/resilient eyelash stem structure obtained is non-poisonous, safe, anti-allergic, high temperature and low temperature resistant, highly stable, water washable and repeatedly usable. ## Claims ### Claim 1 A silica gel/resilient eyelash stem structure, characterized in that: it is integrally formed by enclosing root portions of eyelash strands to be adhered by an adhesive; ingredients for preparing the adhesive comprises the following components in parts by weight: 70-80 parts of a silica gel base, 15-20 parts of a filler, 4-6 parts of a cross-linking agent, 0.2-0.4 parts of a catalytic agent, 0.02-0.05 parts of an inhibiting agent. ### Claim 2 (depends on 1) The silica gel/resilient eyelash stem structure as in claim 1, characterized in that: the filler comprises at least one of a silica and an organic montmorillonite; the cross-linking agent comprises a hydrogen-containing silicone oil; the catalytic agent is a platinum catalyst; the inhibiting agent is an alkynol inhibitor. ### Claim 3 (depends on 2) The silica gel/resilient eyelash stem structure as in claim 2, characterized in that: the silica gel base is a vinyl silicone oil; the vinyl silicone oil comprises 0.1-2% by weight of vinyl, and has a viscosity of 2000-100000 mPas at 25° C.; the hydrogen-containing silicone oil has a molecular weight of 200000-1000000 and comprises 80-90% by weight of Si—H; the platinum catalyst has a concentration of 1000-5000 ppm. ### Claim 4 (depends on 1) The silica gel/resilient eyelash stem structure as in claim 1, characterized in that: the ingredients for preparing the adhesive further comprises 1-5 parts by weight of a coupling agent; the coupling agent is one or a mixture of two of the following: dirthoxydimethylsilane, dimethyldimethoxysilane, dimethyl cyclosiloxane, hexamethyldisilazane. ### Claim 5 (depends on 4) The silica gel/resilient eyelash stem structure as in claim 4, characterized in that: the ingredients for preparing the adhesive further comprises the following components in parts by weight: 75 parts of a vinyl silicone oil, 4.5 parts of a hydrogen-containing silicone oil, 0.3 parts of a platinum catalyst, 0.02-0.05 parts of an alkynol inhibitor, 20 parts of a silica, 1 part of the coupling agent. ### Claim 6 (depends on 5) The silica gel/resilient eyelash stem structure as in claim 5, characterized in that: the adhesive is prepared by the following processes: vaporize the silica and then add in 60-70% of the vinyl silicone oil and mix evenly to obtain a base fluid; add the alkynol inhibitor and the hydrogen-containing silicone oil to 50% of the base fluid to obtain a first component; mix the remaining vinyl silicone oil and the platinum catalyst to the remaining base fluid to obtain a second component; mix the first component and the second component and stir evenly to obtain the adhesive. ### Claim 7 (depends on 6) The silica gel/resilient eyelash stem structure as in claim 6, characterized in that: preparation of the adhesive further comprises the following processes: add 20-50 wt. % of the coupling agent to the base fluid during preparation of the first component; add the remaining coupling agent to the remaining base fluid during preparation of the second component. ### Claim 8 (depends on 1, 2, 3, 4, 5, 6, 7) An artificial eyelash, characterized in that: it comprises eyelash strands and the silica gel/resilient eyelash stem structure as in any of claims 1-7; the adhesive encloses root portions of the eyelash strands to form a unitary piece; the root portions of the eyelash strands which are adhered to the silica gel/resilient eyelash stem structure are tightly embedded in the silica gel/resilient eyelash stem structure; portions of the eyelash strands which are not the root portions are curled in geometric shape towards the same side. ### Claim 9 (depends on 8) A manufacturing process for artificial eyelashes as in claim 8, characterized in that it comprises the following steps: (1) Arrange the root portions of the eyelash strands sequentially at adhering positions where they are to be adhered, and curl and shape the eyelash strands; (2) Coat glue or inject glue at the adhering positions to integrally form a gel stem with root portions of the eyelash strands enclosed; (3) Remove the adhesive at positions which are not the adhering positions and portions of the gel stem which exceeds predetermined length to obtain the artificial eyelash.