US 11,718,750 B2
Thermoplastic resin composition for laser direct structuring process, and molded product comprising same
Nam Hyun Kim, Uiwang-si (KR); Jung Ki Kim, Uiwang-si (KR); and Sang Hyun Hong, Uiwang-si (KR)
Assigned to Lotte Chemical Corporation, Seoul (KR)
Appl. No. 16/958,860
Filed by LOTTE CHEMICAL CORPORATION, Seoul (KR)
PCT Filed Dec. 5, 2018, PCT No. PCT/KR2018/015345
§ 371(c)(1), (2) Date Jun. 29, 2020,
PCT Pub. No. WO2019/132292, PCT Pub. Date Jul. 4, 2019.
Claims priority of application No. 10-2017-0185036 (KR), filed on Dec. 31, 2017.
Prior Publication US 2021/0070984 A1, Mar. 11, 2021
Int. Cl. C08L 69/00 (2006.01); C08L 67/02 (2006.01); C08K 3/32 (2006.01); C23C 18/28 (2006.01); C08G 63/183 (2006.01); C08G 77/448 (2006.01); C08L 51/04 (2006.01); C08L 83/04 (2006.01); C23C 18/16 (2006.01); H05K 1/03 (2006.01); C23C 18/20 (2006.01); C08G 64/18 (2006.01)
CPC C08L 69/00 (2013.01) [C08G 63/183 (2013.01); C08G 77/448 (2013.01); C08K 3/32 (2013.01); C08L 51/04 (2013.01); C08L 67/02 (2013.01); C08L 83/04 (2013.01); C23C 18/1612 (2013.01); C23C 18/204 (2013.01); H05K 1/0373 (2013.01); C08G 64/186 (2013.01); C08K 2003/321 (2013.01); C08K 2003/328 (2013.01); C08L 2207/53 (2013.01)] 8 Claims
 
1. A thermoplastic resin composition comprising:
100 parts by weight of a base resin comprising about 20 wt % to about 70 wt % of a polycarbonate resin, about 10 wt % to about 70 wt % of a polycarbonate-polysiloxane copolymer, and about 5 wt % to about 30 wt % of a polyester resin containing an alicyclic group in a main chain, wherein the polyester resin comprises poly(1,4-cyclohexylene dimethylene terephthalate) (PCT);
about 0.1 to about 20 parts by weight of an additive for laser direct structuring; and
about 1 to about 20 parts by weight of an impact modifier,
wherein the impact modifier and the polycarbonate-polysiloxane copolymer are present in a weight ratio of about 1:5 to about 1:10, and
wherein the thermoplastic resin composition has a weight-dropping height of about 60 cm or more, at which cracks are generated on a specimen of the thermoplastic resin composition upon dropping a metal tip having a weight of 500 g on the specimen in accordance with a DuPont drop test method, the specimen being prepared by dipping an injection molded specimen having a size of 100 mm×100 mm×3.2 mm in a thinner solution for 2 minutes, drying the specimen at 80° C. for 20 minutes, and leaving the specimen at room temperature for 24 hours, and
wherein the composition exhibits plating reliability measured by injection molding the composition to form a specimen having a size of 50 mm×90 mm×3.2 mm, activating a surface of the specimen in stripe form through laser direct structuring, forming a 35 μm thick copper layer on the activated surface of the specimen through copper electroless plating, leaving the plated specimen in a chamber under conditions of 85° C. and 85% RH for 120 hours, carving 100 grid-lattices each having a size of 1 mm×1 mm on the copper plating layer, attaching a tape to the plating layer, and detaching the tape from the plating layer to evaluate plating reliability based on the number of grid-lattices remaining on the plating layer upon detachment of the tape from the plating layer, wherein upon detachment of the tape from the plating layer, 90 or more grid lattices remain on the plating layer.