US2016152802A1PendingUtilityA1

Stearic Acid-Treated Calcium Carbonate Compositions Having Low or No Detectable Free Stearic Acid and Related Methods

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Assignee: IMERYS PIGMENTS INCPriority: Sep 12, 2008Filed: Nov 30, 2015Published: Jun 2, 2016
Est. expirySep 12, 2028(~2.2 yrs left)· nominal 20-yr term from priority
Inventors:Yash P. KhannaDavid Andrew TaylorDavid AnstineChristopher Paynter
C01P 2004/84Y10T428/2991C08K 9/04C01P 2006/12C01P 2002/88C01P 2004/62C09C 1/021
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Claims

Abstract

A method for treating calcium carbonate includes combining calcium carbonate with an amount of stearic acid and an amount of water to form a mixture, the amount of water being at least about 0.1% by weight relative to the total weight. The method further includes blending the mixture to form a stearic acid-treated calcium carbonate composition.

Claims

exact text as granted — not AI-modified
1 - 40 . (canceled) 
     
     
         41 . A composition consisting essentially of:
 calcium carbonate coated with a monolayer concentration of stearic acid, and less than 20% free stearic acid.   
     
     
         42 . The composition of  claim 41 , wherein the calcium carbonate composition comprises less than about 15% free stearic acid. 
     
     
         43 . The composition of  claim 41 , wherein the calcium carbonate composition comprises less than about 10% free stearic acid. 
     
     
         44 . The composition of  claim 41 , wherein the calcium carbonate composition comprises less than about 7% free stearic acid. 
     
     
         45 . The composition of  claim 41 , wherein the calcium carbonate composition comprises less than about 5% free stearic acid. 
     
     
         46 . The composition of  claim 41 , wherein the calcium carbonate composition comprises less than about 3% free stearic acid. 
     
     
         47 . The composition of  claim 41 , wherein the calcium carbonate composition comprises no free stearic acid. 
     
     
         48 . The composition of  claim 41 , further comprising calcium stearate. 
     
     
         49 . The composition of  claim 41 , wherein the calcium carbonate has a d 50  less than about 10 microns 
     
     
         50 . The composition of  claim 41 , wherein the calcium carbonate has a d 50  less than about 8 microns. 
     
     
         51 . The composition of  claim 41 , wherein the calcium carbonate has a d 50  less than about 6 microns. 
     
     
         52 . The composition of  claim 41 , wherein the calcium carbonate has a d 50  less than about 4 microns. 
     
     
         53 . The composition of  claim 41 , wherein the calcium carbonate has a d 50  ranging from about 0.01 micron to about 3 microns. 
     
     
         54 . The composition of  claim 41 , wherein the calcium carbonate has a d 50  ranging from about 0.01 micron to about 2 microns. 
     
     
         55 . The composition of  claim 41 , wherein the calcium carbonate has a d 50  ranging from about 0.05 micron to about 1 micron. 
     
     
         56 . The composition of  claim 41 , wherein the calcium carbonate composition is hydrophobic. 
     
     
         57 . A polymer product comprising the calcium carbonate composition of  claim 41 . 
     
     
         58 . A silicone product comprising the calcium carbonate composition of  claim 41 .

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