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Vehicle Member and Manufacturing Method Therefor (19) TZZ Z_T (11) EP 2 546 057 A1 (12) EUROPEAN PATENT APPLICATION published in accordance with Art. 153(4) EPC (43) Date of publication: (51) Int Cl.: 16.01.2013 Bulletin 2013/03 B32B 27/30 (2006.01) C08F 290/12 (2006.01) C08J 7/04 (2006.01) C09D 4/02 (2006.01) (2006.01) (2006.01) (21) Application number: 11753092.3 C09D 5/00 C09D 7/12 C09D 183/10 (2006.01) (22) Date of filing: 26.01.2011 (86) International application number: PCT/JP2011/051467 (87) International publication number: WO 2011/111430 (15.09.2011 Gazette 2011/37) (84) Designated Contracting States: • MITSUOKA Tetsuya AL AT BE BG CH CY CZ DE DK EE ES FI FR GB Kariya-shi GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO Aichi 448-8671 (JP) PL PT RO RS SE SI SK SM TR • UEDA Naoharu Kariya-shi (30) Priority: 12.03.2010 JP 2010056047 Aichi 448-8671 (JP) • HAMADA Naohiro (71) Applicant: Kabushiki Kaisha Toyota Jidoshokki Tokyo 104-8377 (JP) Kariya-shi, Aichi 448-8671 (JP) • OYA Toru Tokyo 104-8377 (JP) (72) Inventors: • MAEDA Satoshi • HAYASHI Hidetaka Tokyo 104-8377 (JP) Kariya-shi • MIDORIKAWA Toshifumi Aichi 448-8671 (JP) Tokyo 104-8377 (JP) • SHIMO Toshihisa • NAKANO Takenobu Kariya-shi Tokyo 104-8377 (JP) Aichi 448-8671 (JP) • KUMAGAI Kyoko (74) Representative: TBK Kariya-shi Bavariaring 4-6 Aichi 448-8671 (JP) 80336 München (DE) (54) VEHICLE MEMBER AND MANUFACTURING METHOD THEREFOR (57) Disclosed is a vehicle member that includes a molded body and a protective film disposed on a surface of the molded body and formed by curing of an active energy ray-curing composition. The active energy ray- curing composition contains an active energy ray- curing prepolymer (A) obtainable by a reaction of an acrylic- based prepolymer having a hydroxyl group and an acrylic monomer (a4) having an isocyanate group, an active en- ergy ray-curing compound (B) having a benzotriazole group, another active energy ray-curing compound (C) differing from the (A) component and the (B) component, and inorganic oxide particles (D). The acrylic- based pre- polymer having the hydroxyl group is a copolymer that includes an acrylic monomer (a1) having a piperidinyl group, an acrylic monomer (a2) having a hydroxyl group, etc., as monomer units. EP 2 546 057 A1 Printed by Jouve, 75001 PARIS (FR) EP 2 546 057 A1 Description Technical Field 5 [0001] The present invention relates to a vehicle member and a manufacturing method therefor. Background Art [0002] A glass plate is disposed as a window member in a window opening of an automobile and other vehicles. 10 Recently, use of a transparent resin plate in place of a glass plate as the window member has been proposed for weight reduction of automobiles and other vehicles. In particular, an aromatic-polycarbonate-based transparent resin plate is excellent in fracture resistance, transparency, lightness, workability, etc., and is thus a promising material for a vehicle window member. [0003] A vehicle window member is required to have weather resistance because a vehicle is exposed to the outdoors. 15 Also as represented by vehicle washing, various forms of friction and other external forces are applied to a surface of avehicle window member. A vehiclewindow memberis thus requiredto exhibit high anti- wearperformance. In comparison to a glass plate, a transparent resin plate is low in surface hardness and thus readily loses transparency by becoming flawed or worn. There was thus a limit to using a transparent resin plate as a vehicle window member. [0004] Thus, normally a hard coat layer (protective film) having weather resistance and wear resistance is laminated 20 on a surface of a transparent resin plate proposed for use as a vehicle window (Patent Literatures 1 to 4). A coating agent for forming a hard coat layer of excellent weather resistance has also been proposed (Patent Literatures 5 and 6). Citation List 25 Patent Literature [0005] Patent Literature 1: Japanese Patent Application Laid-Open No. H11-78515 Patent Literature 2: Japanese Patent Application Laid-Open No. 2003-311908 30 Patent Literature 3: Japanese Patent Application Laid-Open No. 2004-27110 Patent Literature 4: Japanese Patent Application Laid-Open No. 2007-186573 Patent Literature 5: Japanese Patent Application Laid-Open No. 2000-159828 Patent Literature 6: Japanese Patent Application Laid-Open No. 2007-238823 35 Summary of Invention Technical Problem [0006] However, requirement levels related to weather resistance and wear resistance of window members and other 40 vehicle members are becoming high and there is an issue that a vehicle member having a protective film formed by a conventional coating composition is not necessarily adequate in weather resistance and wear resistance. [0007] Thus, an object of the present invention is to provide a vehicle member having adequately excellent weather resistance and wear resistance. 45 Solution to Problem [0008] A vehicle member according to the present invention includes a molded body and a protective film disposed on a surface of the molded body and formed by curing of an active energy ray-curing composition. The active energy ray-curing composition contains an active energy ray- curing prepolymer (A) obtainable by a reaction of an acrylic- based 50 prepolymer having a hydroxyl group and an acrylic monomer (a4) having an isocyanate group and a (meth)acryloyl group, an active energy ray-curing compound (B) having a benzotriazole group and a (meth)acryloyl group, another active energy ray-curing compound (C) having a (meth)acryloyl group and being defferent from the (A) component and the (B) component, and inorganic oxide particles (D). The acrylic-based prepolymer having the hydroxyl group is a copolymer that includes an acrylic monomer (a1) having a piperidinyl group and a (meth)acryloyl group, an acrylic 55 monomer (a2) having a hydroxyl group and a (meth)acryloyl group, and another monomer (a3), as monomer units. [0009] The vehicle member according to the present invention has adequately excellent weather resistance and wear resistance. [0010] Preferably, the active energy ray-curing prepolymer (A) has a number average molecular weight of 3000 to 2 EP 2 546 057 A1 100000. Preferably, the active energy ray-curing prepolymer (A) has a (meth)acryloyl group equivalent of 250 to 1600. [0011] Preferably, the acrylic monomer (a3) includes a compound having a functional group that contains a fluorine atom. The functional group is preferably a perfluoroalkyl group. [0012] The active energy ray- curing compound (C) preferably includes a compound (C1) having a (meth) acryloyl group 5 and a group expressed by -(CH2)5-. The compound (C1) is preferably a compound expressed by the following general formula (1). 10 15 20 25 [0013] In formula (1), R1 indicates a hydrogen atom or a methyl group, a plurality of R 1 in the same molecule may be the same or different, and n, m, l, o, p, and q indicate integers satisfying n+m+l+o+p+q=1 to 12. Preferably, n, m, l, o, p, and q are integers satisfying n+m+l+o+p+q=6 to 12. 30 [0014] The active energy ray-curing compound (C) preferably further includes a compound (C2) having a (meth) acryloyl group and no group expressed by -(CH 2)5-. The compound (C2) is preferably a urethane compound having an average of 2 to 15 (meth)acryloyl groups and a urethane group. The compound (C2) preferably has a number average molecular weight of 500 to 10000. [0015] The active energy ray- curing compound (C) preferably further includes a silicone oil (C3) having a (meth) acryloyl 35 group. [0016] The inorganic oxide particles (D) are preferably SiO 2 particles. [0017] Preferably on the basis of the total amount of the (A) component, the (B) component, and the (C) component, a proportion of the (A) component is 1 to 50% by mass, a proportion of the (B) component is 1 to 20% by mass, and a proportion of the (C) component is 30 to 95% by mass. 40 [0018] Preferably on the basis of the total amount of the (A) component, the (B) component, and the (C) component, the proportion of the (A) component is 1 to 50% by mass, the proportion of the (B) component is 1 to 20% by mass, a proportion of the (C1) component is 5 to 60% by mass, a proportion of the (C2) component is 20 to 80% by mass, and a proportion of the (C3) component is 0.01 to 2% by mass. [0019] Preferably with respect to 100 parts by weight of the total amount of the (A) component, the (B) component, 45 and the (C) component, an amount of inorganic oxide particles (D) is 0.1 to 20 parts by weight. [0020] In another aspect, the present invention relates to a method for manufacturing the vehicle member. The man- ufacturing method according to the present invention includes a step of forming a film of the active energy ray-curing composition on a surface of a molded body and a step of curing the formed film by irradiation of active energy rays to form a cured film. 50 [0021] By the manufacturing method according to the present invention, a vehicle member having adequately excellent weather resistance and wear resistance can be obtained. Advantageous Effects of Invention 55 [0022] By the present invention, a vehicle member having adequately excellent weather resistance and wear resistance is provided. 3 EP 2 546 057 A1 Brief Description of Drawings [0023] FIG 1 is a sectional view of an embodiment of a vehicle member. 5 Description of Embodiments [0024] A preferred embodiment according to the present invention shall now be described in detail.
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