Polyester resins with particular carbon black as a reheat additive in the production of stretch blow molded bottles and containers

1. A preform or bottle made from a resin composition comprising:

(I) a co-polyester resin comprising (i) a dicarboxylic acid component comprising terephthalic acid, from 5 to 30 mol % of isophthalic acid, and from 2 to 10 mol % of a naphthalene dicarboxylic acid, based on the total number of moles of dicarboxylic acid units in the co-polyester resin, and (ii) a diol component;

(II) a carbon black with an average primary particle size in a range of 102 to 160 nanometers, wherein the carbon black is lampblack; and

(III) at least one resin selected from the group consisting of a polyolefin resin and a polycarbonate resin,

wherein the co-polyester resin does not comprise an antimony catalyst, and

wherein the carbon black is present in the resin composition at a concentration of from 1 ppm to 20 ppm by weight of the resin composition.

2. The preform or bottle of claim 1 , in the form of a preform having a haze of no more than 7%.

3. The preform of claim 1 , in the form of a bottle.

4. The preform or bottle of claim 1 , in the form of a preform having an L* value of from 70 to 80.

5. The preform or bottle of claim 1 , wherein the carbon black is present in the resin composition at a concentration of from 2 ppm to 10 ppm by weight of the resin composition.

6. The preform or bottle of claim 1 , wherein the average primary particle size of the carbon black is in a range of from 105 to 145 nm.

7. The preform or bottle of claim 1 , wherein the average primary particle size of the carbon black is in a range of from 106 to 130 nm.

8. The preform or bottle of claim 1 , wherein the carbon black is present in the resin composition at a concentration of from 5 ppm to 10 ppm by weight of the resin composition.

9. The preform or bottle of claim 1 , wherein the carbon black is present in the resin composition at a concentration of from 6.5 to 8 ppm by weight of the resin composition.

10. The preform or bottle of claim 1 , wherein the co-polyester resin comprises from 4 to 8 mol % of the naphthalene dicarboxylic acid, based on the total number of moles of dicarboxylic acid units in the co-polyester resin.

11. A method of producing a preform,

combining a co-polyester resin, at least one resin selected from the group consisting of a polyolefin resin and a polycarbonate resin, and a carbon black, to obtain a resin composition; and

molding a resin composition into a preform,

wherein the carbon black is lampblack and has an average primary particle size in a range of 102 to 160 nanometers,

wherein the carbon black is present in the resin composition at a concentration of from 1 ppm to 20 ppm by weight of the resin composition,

wherein co-polyester resin comprises (i) a dicarboxylic acid component comprising terephthalic acid, from 5 to 30 mol % of isophthalic acid, and from 2 to 10 mol % of a naphthalene dicarboxylic acid, based on the total number of moles of dicarboxylic acid units in the co-polyester resin, and (ii) a diol component, and

wherein the co-polyester resin does not comprise an antimony catalyst.

12. The method of claim 11 , wherein the resin is in a form of ground resin and the carbon black is in a form of powder, the combining comprises mixing the powder with the ground resin.

13. The method of claim 11 , wherein the combining comprises contacting a dispersion, comprising the carbon black and a liquid, with a prepolymer of the co-polyester resin during production of the co-polyester resin.

14. A method of improving the reheat and color value L* of a preform, the method comprising:

molding a composition into a preform,

wherein the composition comprises a co-polyester resin, at least one resin selected from the group consisting of a polyolefin resin and a polycarbonate resin, and a carbon black,

wherein the carbon black is lampblack and has an average primary particle size in a range of 102 to 160 nanometers,

wherein the carbon black is present in the resin composition at a concentration of from 1 ppm to 20 ppm by weight of the resin composition,

wherein co-polyester resin comprises (i) a dicarboxylic acid component comprising terephthalic acid, from 5 to 30 mol % of isophthalic acid, and from 2 to 10 mol % of a naphthalene dicarboxylic acid, based on the total number of moles of dicarboxylic acid units in the co-polyester resin, and (ii) a diol component, and

wherein the co-polyester resin does not comprise an antimony catalyst.