US 12,371,566 B2
Hot-water moldable polyamide molding compositions
Pascal Lefevre, Lebbeke (BE); and Glenn P. Desio, Marietta, GA (US)
Assigned to SOLVAY SPECIALTY POLYMERS USA, LLC, Alpharetta, GA (US)
Appl. No. 17/609,015
Filed by SOLVAY SPECIALTY POLYMERS USA, LLC, Alpharetta, GA (US)
PCT Filed May 7, 2020, PCT No. PCT/EP2020/062693
§ 371(c)(1), (2) Date Nov. 5, 2021,
PCT Pub. No. WO2020/225358, PCT Pub. Date Nov. 12, 2020.
Claims priority of provisional application 62/844,850, filed on May 8, 2019.
Claims priority of application No. 19198864 (EP), filed on Sep. 23, 2019.
Prior Publication US 2022/0213320 A1, Jul. 7, 2022
Int. Cl. C08L 77/06 (2006.01)
CPC C08L 77/06 (2013.01) 12 Claims
 
1. A polyamide molding composition, comprising the following melt-blended components:
at least one polyamide (P1) consisting essentially of recurring units (RPA) according to formula (I):

OG Complex Work Unit Chemistry
wherein n is 4, and
R1 is a mixture of m-xylylene and p-xylylene in a mol. % ratio varying between 1:99 and 99:1,
at least one polymer (P2) such that:
Tm(P2)≥Tm(P1),
with Tm(P2) and Tm(P1) being respectively the melting point of P2 and P1,
Tc(P2)>Tc(P1),
with Tc(P2) and Tc(P1) being respectively the crystallization temperature of P2 and P1 upon cooling from the melt, and
Tm(P2)−Tc(P2)<Tm(P1)−Tc(P1)
optionally at least one reinforcing agent,
optionally at least one component selected from the group consisting of tougheners, plasticizers, colorants, pigments, antistatic agents, dyes, lubricants, thermal stabilizers, light stabilizers, flame retardants, nucleating agents and antioxidants;
wherein
the weight ratio of P1/P2 varies between 15/1 and 1/1, inclusive and
polymer (P2) comprises recurring units (RPA2) according to formula (V):

OG Complex Work Unit Chemistry
wherein m varies between 6 and 18, inclusive and R1 is p-xylylene.