Abstract: Disclosed are polyesterether bonding compositions comprising repeating units from trans-1,4-cyclohexanedicarboxylic acid, a difunctional sulfomonomer, a polyetherglycol, and 1,4-cyclohexanedimethanol.

Abstract: Disclosed is multi-layered sheet material comprising a layer of polyethylene terephthalate and a layer of an elastomeric copolyesterether. This sheet material is useful in packaging applications where resistance to flex cracking is important.

Abstract: Disclosed is a process for preparing sulfo-modified polyesters having an inherent viscosity of about 0.3 to about 0.9 and characterized by an improved planar stretch ratio relative to a given inherent viscosity, an improved rate of acetaldehyde generation relative to a given planar stretch ratio and increased buildup of melt viscosity. The process comprises the steps of (a) reacting (1) a dicarboxylic acid component comprising at least about 85 mole % terephthalic acid and about 0.1 to about 5.0 mole % of a difunctional sulfo-monomer, and (2) a glycol component comprising at least about 85 mole % ethylene glycol, the reaction being conducted in the presence of a catalyst system comprising a titanium compound and an organic salt of an alkali metal, (2) polycondensing the reaction product of step (1) in the presence of a phosphate ester until a polymer having the desired I.V. is obtained.

Abstract: This invention concerns thermoplastic polyester molding compositions containing iron oxides, particularly Fe.sub.2 O.sub.3 which compositions exhibit markedly reduced heat up times and are especially useful in molding operations such as blow molding of beverage bottles. The polyester polymer may have incorporated therein by copolymerization certain anthraquinone dyes having functional groups which condense during polymerization into the polyester chain. The dye moieties are thermally stable at the polymer processing temperatures and are colorfast and non-extractable from the polymer.

Abstract: This invention concerns thermoplastic polyester molding compositions containing iron oxides, particularly Fe.sub.2 O.sub.3 which compositions exhibit markedly reduced heat up times and are especially useful in molding operations such as blow molding of beverage bottles. The polyester polymer may have incorporated therein by copolymerization certain anthraquinone dyes having functional groups which condense during polymerization into the polyester chain. The dye moieties are thermally stable at the polymer processing temperatures and are colorfast and nonextractable from the polymer.

Abstract: Disclosed is an acidolysis process for preparation of terephthalate, isophthalate, hydroquinone type polyesters wherein the acidolysis process is conducted within a critical temperature range. Use of the critical temperature range provides a polyester with a low enough apparent melt viscosity to be prepared in commercial, gravity flow reactors.