Patent ID: 9732222
Date: 2017-08-15
CPC Classifications: C08G,C08L

Claim:
1. A method of increasing glass transition temperature of a polyamide composition, the method comprising including an effective amount of a sulfonated aliphatic compound or a sulfonated aromatic compound as an agent to increase the glass transition temperature of the polyamide; wherein the polyamide composition comprises a polyamide modified by a sulfonated aliphatic compound or a sulfonated aromatic compound, said compound being chemically bonded to a polymer chain of the polyamide, wherein said modified polyamide is a polycondensate of at least a linear carboxylic diacid and a linear or cyclic diamine, and is present in an amount from 30% to 95% by weight relative to the total weight of the composition, wherein the polyamide is selected from the group consisting of polyamide 66, polyamide 610, polyamide 612, polyamide 1212, polyamide 46, polymethxylyene diamine (MXD6), polyamide 66/6T, mixtures thereof, and copolymers thereof;