Patent ID: 6632390
Filing Date: 2003-10-14
Classification: C08G,C08L,Y10T

Abstract:
A process for producing a profile by profile extrusion comprising the steps of:(a) providing a polyester composition at a melt temperature, wherein the polyester composition has an inherent viscosity of at least 0.65 dl/g and comprises (1) a diacid component comprising 100 to 98.0 mole percent of residues of a primary acid selected from the group consisting of terephthalic acid, napthalenedicarboxylic acid, isophthalic acid and mixtures thereof; (2) a glycol component comprising 100 to 98.0 mole percent of residues of a primary glycol comprising 57 to 90 mole percent ethylene glycol, 10 to 40 mole percent 1,4-cyclohexanedimethanol or neopentyl glycol, and 0 to 3 mole percent diethylene glycol; and (3) 0.05 to 2.0 mole percent of residues of a branching agent selected from the group consisting of an acidic branching agent comprising tri-functional or greater monomer, an alcoholic branching agent comprising tri-functional or greater monomer, and mixtures thereof; wherein the polyester composition is based on 100 mole percent of the diacid component and 100 mole percent of the glycol component; and the acidic branching agent comprises a portion of the diacid component and the alcoholic branching agent comprises a portion of the glycol component; (b) extruding the melt through a die to form a profile.