US2003039783A1PendingUtilityA1

Polyesters and polyester containers having a reduced coefficient of friction and improved clarity

47
Priority: Mar 30, 2001Filed: Mar 25, 2002Published: Feb 27, 2003
Est. expiryMar 30, 2021(expired)· nominal 20-yr term from priority
Inventors:Steven Lee StaffordRonald R. LightLouis Thomas GerminarioEmerson Sharpe
C08K 3/34Y10T428/1352Y10T428/1372
47
PatentIndex Score
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Cited by
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References
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Claims

Abstract

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%.

Claims

exact text as granted — not AI-modified
What is claimed is:  
     
         1 . A polyester having a reduced coefficient of friction and acceptable clarity, comprising polyester containing from about 0.001 to about 0.1 wt % dried talc, wherein the dried talc contains from about 20 to about 300 ppm water.  
     
     
         2 . The polyester of  claim 1  wherein the polyester contains from about 0.001 to about 0.05 wt % dried talc.  
     
     
         3 . The polyester of  claim 1  wherein the dried talc has an average particle size of from about 0.05 to about 50 microns.  
     
     
         4 . The polyester of  claim 1  wherein the dried talc contains from about 50 to about 250 ppm water.  
     
     
         5 . The polyester of  claim 1  having a coefficient of friction of from about 0.01 to about 1.0.  
     
     
         6 . The polyester of  claim 1  wherein the polyester contains from about 0.001 to about 0.02 wt % dried talc.  
     
     
         7 . The polyester of  claim 6  having a clarity with haze values of from about 0.1 to about 4%.  
     
     
         8 . The polyester of  claim 1  wherein the polyester is selected from the group consisting of poly(ethyleneterephthalate), poly(ethylenenaphthalate), poly(ethyleneisophthalate), and poly(ethylenebutyleneterephthalate).  
     
     
         9 . The polyester of  claim 1  wherein the polyester is poly(ethyleneterephthalate).  
     
     
         10 . A polyester container having a reduced coefficient of friction and acceptable clarity, comprising polyester containing from about 0.001 to about 0.1 wt % dried talc, wherein the dried talc contains from about 20 to about 300 ppm water.  
     
     
         11 . The polyester container of  claim 10  wherein the polyester contains from about 0.001 to about 0.05 wt % dried talc.  
     
     
         12 . The polyester container of  claim 10  wherein the dried talc has an average particle size of from about 0.05 to about 50 microns.  
     
     
         13 . The polyester container of  claim 10  wherein the dried talc contains from about 50 to about 250 ppm water.  
     
     
         14 . The polyester container of  claim 10  having a coefficient of friction of from about 0.01 to about 1.0.  
     
     
         15 . The polyester container of  claim 10  wherein the polyester contains from about 0.001 to about 0.02 wt % dried talc.  
     
     
         16 . The polyester container of  claim 15  having a clarity with haze values of from about 0.1 to about 4%.  
     
     
         17 . The polyester container of  claim 10  wherein the polyester is selected from the group consisting of poly(ethyleneterephthalate), poly(ethylenenaphthalate), poly(ethyleneisophthalate), and poly(ethylenebutyleneterephthalate).  
     
     
         18 . The polyester container of  claim 10  wherein the polyester is poly(ethyleneterephthalate).  
     
     
         19 . A polyester having a reduced coefficient of friction and enhanced clarity, comprising polyester containing from about 0.001 to about 0.1 wt % tethered talc.  
     
     
         20 . The polyester of  claim 19  wherein the polyester contains from about 0.001 to about 0.05 wt % tethered talc.  
     
     
         21 . The polyester of  claim 19  wherein the tethered talc has an average particle size of from about 0.05 to about 50 microns.  
     
     
         22 . The polyester of  claim 19  having a coefficient of friction of from about 0.01 to about 1.0.  
     
     
         23 . The polyester of  claim 19  having a clarity with haze values of from about 0.1 to about 3%.  
     
     
         24 . The polyester of  claim 19  wherein the talc in the tethered talc comprises a dried talc, wherein the dried talc contains from about 20 to about 300 ppm water.  
     
     
         25 . The polyester of  claim 24  wherein dried talc contains from about 50 to about 250 ppm water.  
     
     
         26 . A polyester container having a reduced coefficient of friction and enhanced clarity, comprising polyester containing from about 0.001 to about 0.1 wt % tethered talc.  
     
     
         27 . The polyester container of  claim 26  wherein the polyester comprises less than about 0.05 wt % talc.  
     
     
         28 . The polyester container of  claim 26  wherein the tethered talc has an average particle size of from about 0.05 to about 50 microns.  
     
     
         29 . The polyester container of  claim 26  having a coefficient of friction of from about 0.01 to about 1.0.  
     
     
         30 . The polyester container of  claim 26  having a clarity with haze values of from about 0.1 to about 3%.  
     
     
         31 . The polyester container of  claim 26  wherein the talc in the tethered talc comprises a dried talc, wherein the dried talc contains from about 20 to about 300 ppm water.  
     
     
         32 . The polyester container of  claim 31  wherein dried talc contains from about 50 to about 250 ppm water.  
     
     
         33 . An antiblock agent useful in the production of polyester and polyester containers, comprising dried talc containing from about 20 to about 300 ppm water.  
     
     
         34 . The antiblock agent of  claim 33  wherein the dried talc contains from about 50 to about 250 ppm water.  
     
     
         35 . An antiblock agent useful in the production of polyester and polyester containers, comprising dried talc that has been treated with a fatty acid to produce a tethered dried talc, wherein the dried talc contains from about 20 to about 300 ppm water.  
     
     
         36 . The antiblock agent of  claim 35  wherein the dried talc contains from about 50 to about 250 ppm water.  
     
     
         37 . An antiblock agent comprising a dried antiblock agent useful in the production of polyester and polyester containers, wherein the antiblock agent contains from about 20 to about 300 ppm water.  
     
     
         38 . The antiblock agent of  claim 37  selected from the group consisting of amorphous silica, barium sulfate, zinc stearate, calcium phosphate, and mixtures thereof.  
     
     
         39 . The antiblock agent of  claim 37  wherein the dried talc contains from about 50 to about 250 ppm water.  
     
     
         40 . The antiblock agent of  claim 37  wherein the dried antiblock agent is barium sulfate.

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