US 12,378,411 B2
Use of a reinforced thermoplastic composition
Stefânia Cassiano Gaspar, Serquigny (FR); Benoît Brule, Serquigny (FR); Mathieu Sabard, Serquigny (FR); Xiong Yao, Jiangsu (CN); and Marie Pommier De Santi, Yao (JP)
Assigned to ARKEMA FRANCE, Puteaux (FR)
Appl. No. 17/794,874
Filed by Arkema France, Colombes (FR)
PCT Filed Jun. 25, 2020, PCT No. PCT/EP2020/067873
§ 371(c)(1), (2) Date Jul. 22, 2022,
PCT Pub. No. WO2020/260479, PCT Pub. Date Dec. 30, 2020.
Claims priority of application No. PCT/CN2019/093763 (WO), filed on Jun. 28, 2019.
Prior Publication US 2023/0060165 A1, Mar. 2, 2023
Int. Cl. C08L 77/06 (2006.01); C08G 69/26 (2006.01); C08J 5/04 (2006.01); C08K 5/098 (2006.01); C08K 7/14 (2006.01)
CPC C08L 77/06 (2013.01) [C08G 69/26 (2013.01); C08J 5/043 (2013.01); C08K 5/098 (2013.01); C08K 7/14 (2013.01); C08J 2377/06 (2013.01); C08K 2201/003 (2013.01); C08L 2205/02 (2013.01)] 10 Claims
 
1. A method comprising forming a molded article with reduced warpage from a fiber-reinforced thermoplastic composition,
wherein the composition comprises:
from 30 to 70% by weight of an amorphous polyamide matrix by total weight of the composition; and,
from 30 to 70% by weight of glass fibers with a circular cross-section by total weight of the composition; and,
optionally additives;
wherein the amorphous polyamide matrix comprises at least one amorphous polyamide and at least one aliphatic semi-crystalline polyamide;
wherein the fiber-reinforced thermoplastic composition has a melt viscosity of at most 1,300 Pa·s, when measured at a shear rate of 110 s-1 at 260° C. according to the ISO11443:2014 standard;
wherein the weight ratio between the amorphous polyamide and the aliphatic semi-crystalline polyamide in the amorphous polyamide matrix is from 60:40 to 90:10;
wherein the amorphous polyamide is selected from the group consisting of homopolyamides of formula X1Y1, copolyamides of formula Z1/X1Y1 and/or copolyamides of formula X0Y0/X1Y1;
wherein the unit X1 is derived from a cycloaliphatic diamine monomer having from 8 to 18 carbons or a mixture of at least two of these monomers thereof;
wherein the unit Y1 is derived from a linear aliphatic diacid monomer having from 4 to 36 carbons or a mixture of at least two of these monomers thereof; or wherein the unit Y1 is derived from an aromatic diacid having from 6 to 18 carbons or a mixture of at least two of these monomers thereof;
wherein the unit Z1, if present, is derived from an amino acid monomer having from 9 to 18 carbons or a lactam monomer having from 6 to 18 carbons;
wherein the unit X0, if present, is derived from a linear aliphatic diamine monomer having from 4 to 18 carbons or a mixture of at least two of these monomers thereof;
wherein the unit Y0, if present, is derived from a linear aliphatic diacid monomer having from 4 to 36 carbons or a mixture of at least two of these monomers thereof;
wherein the aliphatic semi-crystalline polyamide is selected from the group consisting of polyamides of formula Z2 and/or polyamides of formula X2Y2;
wherein the unit Z2, if present, is derived from an amino acid having from 9 to 18 carbons; or a lactam having from 6 to 18 carbons;
wherein the unit X2, if present, is derived from an aliphatic diamine monomer from 4 to 18 carbons, or mixtures thereof; and
wherein the unit Y2, if present, is derived from a linear aliphatic diacid monomer having from 4 to 36 carbons, or mixtures thereof.