Claims
- 1. A profile made by profile extrusion comprising a polyester composition having an inherent viscosity of at least 0.65 dl/g and comprising:(a) a diacid component comprising 100 to 98.0 mole percent of residues of a primary acid selected from the group consisting of terephthalic acid, naphthalenedicarboxylic acid, isophthalic acid and mixtures thereof; (b) a glycol component comprising 100 to 98.0 mole percent of residues of a primary glycol selected from the group consisting of ethylene glycol, 1,4-cyclohexanedimethanol, diethylene glycol, neopentyl glycol, and mixtures thereof; and (c) 0.05 to 2.0 mole percent of residues of a branching agent selected from the group consisting of an acidic branching agent comprising a tri-functional or greater monomer, an alcoholic branching agent comprising a 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.
- 2. The profile of claim 1 wherein a power law index of the polyester composition is less than 0.6.
- 3. The profile of claim 1 having a surface roughness of 5000 Angstroms or less.
- 4. The profile of claim 3 having a surface roughness of 1000 Angstroms or less.
- 5. The profile of claim 4 having a surface roughness of 500 Angstroms or less.
Parent Case Info
This application is a divisional of 09/560,455 filed Apr. 28, 2000, now U.S. Pat. No. 6,632,390.
This application claims the benefit of U.S. Provisional Application Ser. No. 60/139,285 filed Jun. 15, 1999 titled “Polyester Compositions for Profile Extrusion”.
US Referenced Citations (31)
Provisional Applications (1)
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Number |
Date |
Country |
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60/139285 |
Jun 1999 |
US |