Compositions

Abstract

The present invention relates to compositions and methods for coating paper products

1 - 26 . (canceled) 
     
     
         27 . A composition for coating paper products comprising a co-processed microfibrillated cellulose and inorganic particulate material composition, wherein the microfibrillated cellulose has a fibre steepness of from 20 to 50 and a d 50  of from 5 to 500 μm, and wherein when the coating composition is applied to a paper product, the coated paper product has a tensile strength greater than the tensile strength of the paper product coated with a control coating composition having the same composition except for the co-processed microfibrillated cellulose and inorganic particulate material composition. 
     
     
         28 . The composition according to  claim 27 , wherein when the coating is applied to a paper product the coated paper product has a tensile strength about 5% greater, about 10% greater, or about 20% greater than the tensile strength of the coated paper product comprising a coating composition devoid of the co-processed microfibrillated cellulose and inorganic particulate material composition. 
     
     
         29 . The coating composition according to claim  1 , wherein the organic particulate material is calcium carbonate. 
     
     
         30 . The coating composition according to claim  1 , wherein the organic particulate material is kaolin. 
     
     
         31 . The coating composition according to claim  1  further comprising one or more of the following additives:
 a. one or more pigments, such as calcium sulphate, satin white, and so-called ‘plastic pigment’; 
 b. one or more binding or co-binding agents; 
 c. one or more cross linkers; 
 d. one or more water retention aids; 
 e. one or more viscosity modifiers and/or thickeners; 
 f. one or more lubricity/calendering aids; 
 g. one or more dispersants; 
 h. one or more antifoamers and defoamers; 
 i. one or more optical brightening agents and fluorescent whitening agents; 
 j. one or more dyes; 
 k. one or more biocides/spoilage control agents; 
 l. one or more leveling and evening aids; and 
 m. one or more grease and oil resistance additives. 
 
     
     
         32 . A method for coating a paper product comprising:
 providing a coating composition on the paper product to form a coating, wherein the coating composition comprises a co-processed microfibrillated cellulose and inorganic particulate material composition, wherein the microfibrillated cellulose has a fibre steepness of from 20 to 50 and a d 50  of from 5 to 500 μm, for the preparation of a coated paper product with a tensile strength about 5% greater, about 10% greater, or about 20% greater than the tensile strength of the coated paper product comprising a coating composition devoid of the co-processed microfibrillated cellulose and inorganic particulate material composition   
     
     
         33 . The method according to  claim 32 , wherein the organic particulate material is calcium carbonate. 
     
     
         34 . The method according to  claim 32 , wherein the organic particulate material is kaolin. 
     
     
         35 . The method according to  claim 32 , wherein the composition further comprises one or more of the following additives:
 a. one or more pigments, such as calcium sulphate, satin white, and so-called ‘plastic pigment’;   b. one or more binding or co-binding agents;   c. one or more cross linkers;   d. one or more water retention aids;   e. one or more viscosity modifiers and/or thickeners;   f. one or more lubricity/calendering aids;   g. one or more dispersants;   h. one or more antifoamers and defoamers;   i. one or more optical brightening agents and fluorescent whitening agents;   j. one or more dyes;   k. one or more biocides/spoilage control agents;   l. one or more leveling and evening aids; and   m. one or more grease and oil resistance additives.