US 12,331,190 B2
Polycarbonate-based thermoplastic compositions having improved transparency properties
Qin Wang, Shanghai (CN); Jian Yang, Shanghai (CN); and Xingqiu Wan, Shanghai (CN)
Assigned to SHPP Global Technologies B.V., Bergen op Zoom (NL)
Appl. No. 18/727,355
Filed by SHPP GLOBAL TECHNOLOGIES B.V., Bergen op Zoom (NL)
PCT Filed Jan. 9, 2023, PCT No. PCT/IB2023/050157
§ 371(c)(1), (2) Date Jul. 9, 2024,
PCT Pub. No. WO2023/131918, PCT Pub. Date Jul. 13, 2023.
Claims priority of application No. 22150758 (EP), filed on Jan. 10, 2022.
Prior Publication US 2024/0425700 A1, Dec. 26, 2024
Int. Cl. C08L 69/00 (2006.01); C08K 5/103 (2006.01); C08K 5/524 (2006.01)
CPC C08L 69/00 (2013.01) [C08K 5/103 (2013.01); C08K 5/524 (2013.01); C08L 2201/10 (2013.01); C08L 2205/02 (2013.01); C08L 2205/06 (2013.01)] 11 Claims
 
1. A thermoplastic composition comprising:
a thermoplastic resin comprising a polycarbonate copolymer comprising a polyester-polycarbonate copolymer, an isophthalate-terephthalate-resorcinol (ITR)-polycarbonate copolymer, or a combination thereof;
from about 0.1 wt % to about 0.3 wt % of a mold release agent comprising a pentaerythritol tetrastearate derived from an aliphatic carboxylic acid having less than 50 wt % content of C18 or longer alkane chains; and
from 0.01 wt % to about 5 wt % of a stabilizer component,
wherein the composition
(1) has a haze that is at least 15% lower than that of a comparative composition that includes pentaerythritol tetrastearate derived form an animal source instead of the mold release agent derived from an aliphatic carboxylic acid having less than 50 wt % content of C18 or longer alkane chains, or
(2) has a notched Izod impact strength (NII) that is at least 15% higher than that of a comparative composition that includes pentaerythritol tetrastearate derived from an animal source instead of the mold release agent derived from an aliphatic carboxylic acid having less than 50 wt % content of C18 or longer alkane chains, wherein NII is determined according to ASTM D256 and ASTM D4812 at 23° C. with a pendulum energy of 5 pound-force per foot (lbf/ft), and
wherein the combined weight percent value of all components does not exceed 100 wt %, and all weight percent values are based on the total weight of the composition.