Polyesters and polyester containers having a reduced coefficient of friction and improved clarity
View Patent ↗Polyesters and polyester containers having a reduced coefficient of friction and improved clarity are produced using an antiblock agent comprising a dried talc having from about 20 to about 300 ppm water or a fatty acid tethered talc. The use of these talcs result in polyesters and polyester containers having a coefficient of less than about 1.0 and a clarity with haze values of less than about 4%.
1. A method for making a polyester polymer composition, comprising blending about 0.001 to about 0.1 wt % antiblocking agent containing from about 20 to about 300 ppm water with a polyester polymer, and forming a polyester polymer composition having a coefficient of friction from about 0.01 to about 1.0.
2. The method of claim 1 , wherein the method comprises blending about 0.001 to about 0.05 wt % antiblocking agent with said polyester polymer.
3. The method of claim 1 , wherein the method comprises blending about 0.001 to about 0.02 wt % antiblocking agent with said polyester polymer.
4. The method of claim 1 , wherein the polyester polymer composition has a haze value of from about 0.1% to about 4%.
5. The method of claim 1 , wherein the polyester polymer composition has a haze value of from about 0.1% to about 3%.
6. The method of claim 5 , wherein the antiblocking agent comprises talc having an average particle size of from about 0.2 microns to about 10 microns.
7. The method of claim 1 , wherein the polyester polymer composition has a haze value of from about 0.1% to about 2%.
8. The method of claim 1 , wherein the antiblocking agent is selected from the group consisting of amorphous silica, barium sulfate, zinc stearate, calcium phosphate, talc and mixtures thereof.
9. The method of claim 1 , wherein the polyester polymer composition produced comprises poly(ethyleneterephthalate), poly(ethylenenaphthalate), poly(ethyleneisophthalate), or poly(ethylenebutyleneterephthalate).
10. The method of claim 1 , wherein the polyester polymer composition comprises poly(ethyleneterephthalate).
11. The method of claim 1 , wherein the antiblocking agent comprises talc.
12. The method of claim 11 , wherein the polyester polymer composition comprises about 0.001 to about 0.02 wt % of talc.
13. The method of claim 11 , wherein the polyester polymer composition has a haze value of about 0.1% to about 3%.
14. The method of claim 11 , wherein the polyester polymer composition comprises about 0.001 to about 0.02 wt % of talc and has a haze value of about 0.1% to about 3%.
15. A method for making a concentrate, comprising blending an antiblocking agent containing from about 20 to about 300 ppm water with a polyester polymer to form a concentrate, wherein said concentrate is useful for making a polyester polymer composition having a coefficient of friction from about 0.01 to about 1.0.
16. The method of claim 15 , wherein the antiblocking agent comprises talc.
17. The method of claim 16 , wherein the polyester polymer composition comprises about 0.001 to about 0.02 wt % of talc.
18. The method of claim 16 , wherein the polyester polymer composition has a haze value of about 0.1% to about 3%.
19. The method of claim 16 , wherein the polyester polymer composition comprises about 0.001 to about 0.02 wt % of talc and has a haze value of about 0.1% to about 3%.
20. A method for making a polyester polymer composition, comprising blending an antiblocking agent containing from about 20 to about 300 ppm water with a polyester polymer to form a concentrate, and then blending said concentrate with a virgin polyester polymer to form a polyester polymer composition having a coefficient of friction from about 0.01 to about 1.0.
21. The method of claim 20 , wherein said polyester polymer composition has a final concentration of about 0.001 to about 0.05 wt % antiblocking agent.
22. The method of claim 20 , wherein said polyester polymer composition has a final concentration of about 0.001 to about 0.02 wt % antiblocking agent.
23. The method of claim 20 , wherein said polyester polymer composition has a haze value of from about 0.1% to about 4%.
24. The method of claim 20 , wherein said polyester polymer composition has a haze value of from about 0.1% to about 3%.
25. The method of claim 20 , wherein said polyester polymer composition has a haze value of from about 0.1% to about 2%.
26. The method of claim 20 , wherein the antiblocking agent is selected from the group consisting of amorphous silica, barium sulfate, zinc stearate, calcium phosphate, talc and mixtures thereof.
27. The method of claim 26 , wherein antiblocking agent comprises talc having an average particle size of from about 0.2 microns to about 10 microns.
28. The method of claim 20 , wherein the polyester polymer composition comprises poly(ethyleneterephthalate), poly(ethylenenaphthalate), poly(ethyleneisophthalate), or poly(ethylenebutyleneterephthalate).
29. The method of claim 20 , wherein the polyester polymer composition comprises poly(ethyleneterephthalate).
30. The method of claim 20 , wherein the antiblocking agent comprises talc.
31. The method of claim 30 , wherein the polyester polymer composition comprises about 0.001 to about 0.02 wt % of talc.
32. The method of claim 30 , wherein the polyester polymer composition has a haze value of about 0.1% to about 3%.
33. The method of claim 30 , wherein the polyester polymer composition comprises about 0.001 to about 0.02 wt % of talc and has a haze value of about 0.1% to about 3%.