# US 2019/0169427 A1 · Aromatic Polymer Composition for Use in a Camera Module > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0169427 A1 - Document ID: US20190169427A1 - Status: Published application - Kind: A1 - Application number: 16/202,195 - Filed: 2018-11-28 - Published: 2019-06-06 - Earliest claimed: 2017-12-05 - Assignees: Ticona LLC - Applicants: Ticona LLC - Inventors: Young Shin Kim - Web page: https://patentgrep.com/patent/US20190169427A1 ## CPC - C08L 67/03: the dicarboxylic acids and dihydroxy compounds having the carboxyl- and the hydroxy groups directly linked to aromatic rings - C08L 23/0884: Epoxide-containing esters - G03B 17/02: Bodies - C08K 3/017: Antistatic agents - C08L 2205/03: containing three or more polymers in a blend - C08L 2205/035: containing four or more polymers in a blend - C08L 2205/12: containing additives being liquid crystalline or anisotropic in the melt - C08L 2205/14: containing polymeric additives characterised by shape - C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06) - G03B: APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR (optical parts of such apparatus G02B; photosensitive materials or processes for photographic purposes G03C; apparatus for processing exposed photographic materials G03D) - C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09) ## Abstract A polymer composition that contains an aromatic polymer in combination with a tribological formulation is provided. The polymer composition may exhibit a low degree of surface friction that minimizes the extent to which a skin layer is peeled off during use of a part containing the composition (e.g., in a camera module). For example, the polymer composition may exhibit a dynamic coefficient of friction of about 1.0 or less and/or a wear depth may be about 500 micrometers or less as determined in accordance with VDA 230-206:2007. ## Claims ### Claim 1 A polymer composition comprising at least one aromatic polymer and a tribological formulation in an amount from about 1 to about 20 parts by weight per 100 parts by weight of the aromatic polymer, wherein the tribological formulation contains a fluorinated additive and a siloxane polymer having a weight average molecular weight of about 100,000 grams per mole or more, and further wherein the weight ratio of the fluorinated additive to the siloxane polymer is from about 0.5 to about 12. ### Claim 2 (depends on 1) The polymer composition of claim 1, wherein the aromatic polymer constitute from about 20 wt. % to about 70 wt. % of the polymer composition and the tribological formulation constitutes from about 1 wt. % to about 30 wt. % of the polymer composition. ### Claim 3 (depends on 1) The polymer composition of claim 1, wherein the siloxane polymer is present in an amount from about 0.1 to about 20 parts by weight per 100 parts by weight of the aromatic polymer. ### Claim 4 (depends on 1) The polymer composition of claim 1, wherein the siloxane polymer includes siloxane units in the backbone having the formula: RrSiO(4-r/2) wherein R is independently hydrogen or substituted or unsubstituted hydrocarbon radicals and r is 0, 1, 2 or 3. ### Claim 5 (depends on 4) The polymer composition of claim 4, wherein the siloxane polymer includes alkyl radicals bonded to at least 70 mol % of the Si atoms. ### Claim 6 (depends on 1) The polymer composition of claim 1, wherein the siloxane polymer includes dimethylpolysiloxane, phenylmethylpolysiloxane, vinylmethylpolysiloxane, trifluoropropylpolysiloxane, or a combination thereof. ### Claim 7 (depends on 1) The polymer composition of claim 1, wherein the siloxane polymer has a kinematic viscosity of about 10,000 centistokes or more. ### Claim 8 (depends on 1) The polymer composition of claim 1, wherein the tribological formulation further includes silica particles. ### Claim 9 (depends on 1) The polymer composition of claim 1, wherein the fluorinated additive is present in an amount of from about 0.1 to about 20 parts by weight per 100 parts by weight of the aromatic polymer. ### Claim 10 (depends on 1) The polymer composition of claim 1, wherein the fluorinated additive includes a fluoropolymer. ### Claim 11 (depends on 10) The polymer composition of claim 10, wherein the fluoropolymer includes polytetrafluoroethylene, perfluoroalkylvinyl ether, poly(tetrafluoroethylene-co-perfluoroalkyvinyl ether) fluorinated ethylene-propylene copolymer, ethylene-tetrafluoroethylene copolymer, polyvinylidene fluoride, polychlorotrifluoroethylene, or a combination thereof. ### Claim 12 (depends on 10) The polymer composition of claim 10, wherein the fluoropolymer is coated onto carrier particles. ### Claim 13 (depends on 12) The polymer composition of claim 12, wherein the carrier particles include silicate particles. ### Claim 14 (depends on 1) The polymer composition of claim 1, further comprising an inorganic filler in an amount of from about 10 to about 95 parts by weight per 100 parts by weight of the aromatic polymer. ### Claim 15 (depends on 14) The polymer composition of claim 14, wherein the inorganic filler contains particles having a hardness value of about 2.5 or more based on the Mohs hardness scale. ### Claim 16 (depends on 15) The polymer composition of claim 15, wherein the particles include barium sulfate. ### Claim 17 (depends on 1) The polymer composition of claim 1, further comprising an impact modifier in an amount from about 0.1 to about 20 parts by weight per 100 parts by weight of the aromatic polymer. ### Claim 18 (depends on 17) The polymer composition of claim 17, wherein the impact modifier includes an epoxy-functionalized olefin copolymer. ### Claim 19 (depends on 1) The polymer composition of claim 1, further comprising an antistatic filler in an amount from about 0.1 to about 20 parts by weight per 100 parts by weight of the aromatic polymer. ### Claim 20 (depends on 19) The polymer composition of claim 19, wherein the antistatic filler includes an ionic liquid. ### Claim 21 (depends on 1) The polymer composition of claim 1, wherein the aromatic polymer has a glass transition temperature of about 100° C. or more and/or a melting temperature of about 200° C. or more. ### Claim 22 (depends on 1) The polymer composition of claim 1, wherein the aromatic polymer is a thermotropic liquid crystalline polymer. ### Claim 23 (depends on 22) The polymer composition of claim 22, wherein the liquid crystalline polymer contains repeating units derived from terephthalic acid, isophthalic acid, 2,6-naphthalenedicarboxylic acid, 4-hydroxybenzoic acid, 6-hydroxy-2-naphthoic acid, hydroquinone, 4,4′-biphenol, acetaminophen, or a combination thereof. ### Claim 24 (depends on 1) The polymer composition of claim 1, wherein the composition exhibits a dynamic coefficient of friction of about 1.0 or less as determined in accordance with VDA 230-206:2007. ### Claim 25 (depends on 1) The polymer composition of claim 1, wherein the composition exhibits a wear depth of about 500 micrometers or less as determined in accordance with VDA 230-206:2007. ### Claim 26 (depends on 1) The polymer composition of claim 1, wherein the composition exhibits a spiral flow length of about 15 millimeters or more as determined in accordance with ASTM D3121-09. ### Claim 27 (depends on 1) A molded part comprising the polymer composition of claim 1. ### Claim 28 (depends on 26) A camera module comprising the molded part of claim 26. ### Claim 29 A camera module comprising a base on which is mounted a carrier assembly, wherein the base, carrier assembly, or both comprise a molded part, wherein the molded part contains a polymer composition that comprises at least one thermotropic liquid crystalline polymer and a tribological formulation, wherein the composition exhibits a dynamic coefficient of friction of about 1.0 or less as determined in accordance with VDA 230-206:2007. ### Claim 30 (depends on 29) The camera module of claim 29, wherein the composition exhibits a wear depth of about 500 micrometers or less as determined in accordance with VDA 230-206:2007. ### Claim 31 (depends on 29) The camera module of claim 29, wherein the tribological formulation includes a siloxane polymer having a weight average molecular weight of about 100,000 grams per mole or more. ### Claim 32 (depends on 31) The camera module of claim 31, wherein the siloxane polymer has a kinematic viscosity of about 10,000 centistokes or more. ### Claim 33 (depends on 29) The camera module of claim 29, wherein the tribological formulation further includes a fluorinated additive. ### Claim 34 (depends on 33) The camera module of claim 33, wherein the fluorinated additive includes a fluoropolymer. ### Claim 35 (depends on 34) The camera module of claim 34, wherein the fluoropolymer is coated onto silicate particles. ### Claim 36 (depends on 29) The camera module of claim 29, wherein the polymer composition further comprises inorganic filler particles having a hardness value of about 2.5 or more based on the Mohs hardness scale. ### Claim 37 (depends on 29) The camera module of claim 29, wherein the polymer composition further comprises an impact modifier. ### Claim 38 (depends on 29) The camera module of claim 29, wherein the polymer composition further comprises an antistatic filler. ### Claim 39 (depends on 29) The camera module of claim 29, wherein the liquid crystalline polymer contains repeating units derived from terephthalic acid, isophthalic acid, 2,6-naphthalenedicarboxylic acid, 4-hydroxybenzoic acid, 6-hydroxy-2-naphthoic acid, hydroquinone, 4,4′-biphenol, acetaminophen, or a combination thereof.