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US 6,309,719 B1Granted
Amorphous copolyester resin composition
AssigneeArteva North America S.A.R.L.
InventorsDavid Anthony Schiraldi, Daniel Martin Connor
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AssigneeArteva North America S.A.R.L.
InventorsDavid Anthony Schiraldi, Daniel Martin Connor
Estimating the term…
Copolyesters comprising monomeric units derived from norbornane compounds such as 2,3-norbornane dicarboxylic acid anhydride or dicarboxylate exhibit amorphous characteristics. Exemplary copolymers are obtained by polycondensation of ethylene glycol, terephthalic acid, and up to about 40 mole % cis-norbornane-endo-2,3-dicarboxylic acid anhydride or dimethyl trans-norbornane 2,3-dicarboxylate or mixtures thereof, based upon the total moles of ester forming components of the polyester. The copolymers containing monomeric units derived from norbornane dicarboxylic acid or dicarboxylate can be obtained by melt polymerization and exhibit no or very low crystallinity. The copolyesters may be used to produce transparent, optically clear amorphous articles of manufacture such as containers, extruded objects, and packaging by melt processing techniques such as injection molding, blow molding, extrusion or thermoforming.
An amorphous copolyester as determined by differential scanning calorimetry analysis comprising residues of at least one ester forming norbornane compound of formula (I)
An amorphous copolyester, as determined by differential scanning-calorimetry analysis, comprising residues of at least one ester forming trans-norbornane compound in an amount from about 7 mole % up to about 20 mole %, based upon the total moles of ester-forming, components, wherein said ester forming-trans-norboraane compound has ester forming functional groups in the 2-position and 3-position of the norbornane compound, and said copolyester having a melting enthalpy of less than about 2 J/g as measured by differential scanning calorimetry on second heating of a 5 mg sample at a rate of 10° C./minute.
A non-fibrous article of manufacture obtained by melt processing, comprising a copolyester comprising from about 7 mole % up to about 20 mole % of residues of an ester forming norbornane compound, based upon the total moles of ester forming components, wherein said article is amorphous as determined by differential scanning calorimetry analysis.
A container comprising a polyester which has residues of an ester forming norbornane compound in an amount from about 7 mole % up to about 20 mole %, based upon the total moles of ester forming components.
An amorphous copolyester as determined by differential scanning calorimetry analysis comprising residues of at least one ester forming norbornane compound of formula (I)
Dependencies are inferred from the claim text.