US 12,305,022 B2
Polyamide composition
Kathrin Salwiczek, Recklinghausen (DE); Chenyu Ye, Shanghai (CN); Urs Welz-Biermann, Lafayette, IN (US); Klaus Hülsmann, Haltern am See (DE); Fei Teng, Shanghai (CN); Zhisheng Wang, Shanghai (CN); and Juan Guo, Shanghai (CN)
Assigned to Evonik Operations GmbH, Essen (DE)
Appl. No. 17/595,059
Filed by Evonik Operations GmbH, Essen (DE)
PCT Filed May 9, 2020, PCT No. PCT/CN2020/089301
§ 371(c)(1), (2) Date Nov. 8, 2021,
PCT Pub. No. WO2020/228621, PCT Pub. Date Nov. 19, 2020.
Prior Publication US 2022/0195145 A1, Jun. 23, 2022
Int. Cl. C08K 7/14 (2006.01)
CPC C08K 7/14 (2013.01) 17 Claims
 
1. A polyamide composition, comprising:
a) 88.5-98 wt. % of at least one aliphatic polyamide, wherein at least one monomer unit has 10 to 14 carbon atoms, and wherein the at least one aliphatic polyamide is semi-crystalline; and
b) 2-11.5 wt. % of an S glass fiber,
wherein the wt. % of a) and b) is based on a total weight of the polyamide composition, wherein the polyamide composition comprises neither
a polyolefinic impact modifier, comprising
35 to 94.9 wt % of ethene-based monomer units,
5 to 65 wt % of monomer units based on a 1-alkene with 3 to 8 carbon atoms,
0 to 10 w1% of monomer units based on another olefin, and
0.1 to 2.5 wt % of monomer units based on an aliphatically unsaturated dicarboxylic acid anhydride,
based on the total weight of the polyolefinic copolymer impact modifier;
nor
a core-shell modifier which comprises the following:
a core which comprises 60 to 100 wt % of butadiene units and 0 to 40 w1% of styrene units, each based on a total weight of the core, wherein the core makes up 60 to 95 wt % of the core-shell modifier; and
a shell which comprises 80 to 100 wt % of methyl methacrylate units and 0 to 20 wt % of modifying monomer units, each based on a total weight of the shell, wherein the shell makes up 5 to 40 wt % of the core-shell modifier,
wherein said polyamide composition is transparent with a haze not greater than 60%, measured according to ASTM D1003 on injection moulded test specimens of 3 mm in thickness.