Patent ID: 9321888
Filing Date: 2016-04-26
CPC Classification: B29C,B29K,B29L,C08G,C08L

Claim Text:
1. A branched polyamide prepolymer comprising repeat units derived from a monomer mixture comprising: (A) a first monomer (referred to as monomer A) which is a linear or branched aliphatic diamine having two amino functional groups, and (B) a second monomer (referred to as monomer B) having two carboxylic acid functional groups which is at least one selected from the group consisting of adipic acid, terephthalic acid, isophthalic acid and ester or acid chloride derivatives thereof, and/or a salt of monomers A and B, and (C) a third monomer (referred to as monomer C) which is at least one tris-amino functional compound selected from the group consisting of bis(hexamethyene)triamine (BHT), diethylenetriamine (DETA) and tris(aminoethyl)amine (TAEA), wherein the repeat units are present in molar amounts according to formula I and formula II: wherein MA, MB and MC represent the molar amounts of repeat units derived from the monomers A, B and C, respectively; FC represent the functionality of monomer C, and is equal to FC-A+FC-B; FC-A is the number of the amino functional groups comprised by monomer C; FC-B is the number of carboxyl functional groups or precursor groups thereof comprised by monomer C; Q is a number in the range of 0.06-1.00; and R is a number in the range of 0.7-1.3, and wherein the polyamide prepolymer has a viscosity number (VN), measured according to ISO 307, in the range of 7-30 mL/g.