Container for roller-applied coating compositions and its use in coating procedures for rough surfaces

Abstract

A container ( 1 ) for a roller-applied viscous coating compositions ( 5 ) which facilitates non-messy loading of the composition onto a roller and non-messy removal of excess composition from the roller. The container has an opening large enough to allow insertion of the roller and also a grid ( 6 ) located below the opening but extending only part way across the container so as to leave access ( 7 ) to a lower portion ( 1 a ) of the container below the grid where when in use, coating composition is stored. Insertion of the roller into the composition and its subsequent withdrawal load excess composition onto the roller. The excess composition can be removed from the roller by rolling it across the grid from where the excess drips back into the main volume of the composition. Loading the roller, removal of the excess and its return to the lower portion all occur within the container so avoiding mess. Also the lidded container when containing coating composition and its use in a procedure for coating rough compositions. surfaces using high viscosity coating compositions.

1 . A container ( 1 ) for a roller-applied coating composition ( 5 ) which container has an opening dimensioned so as to allow a roller to be insertable into the container and into coating composition if contained in the container wherein the container also is provided with a grid ( 6 ) for removing excess coating composition from a roller which grid is located below the opening and extends only part way across the container leaving an access for the roller past the grid into the lower portion of the container.  
   
   
       2 . A container according to  claim 1  in which the distance from the top surface of the grid to the opening is at least 75% of the diameter of the roller.  
   
   
       3 . A container according to  claim 2  in which the distance is at least 100% of the diameter of the roller.  
   
   
       4 . A container according to any of the preceding claims, in which the grid is attached to the container.  
   
   
       5 . A container according to  claim 4  in which the attachment is in a manner that requires a positive act to break the attachment.  
   
   
       6 . A container as claimed in any of the preceding claims, wherein the grid is carried by a collar ( 3 ) which makes a close fit within and is supported by the container.  
   
   
       7 . A container as claimed  claim 6 , wherein the collar is attached to the container to guard against unintentional removal of the collar from the container.  
   
   
       8 . A container as claimed in any of the preceding claims, wherein the container is provided with means to retain a lid ( 4 ).  
   
   
       9 . A container as claimed in any one of  claims 6  to  8 , wherein the container includes means for engaging a lid and/or the collar by means of a snap-fit.  
   
   
       10 . A container according to any of the preceding claims, wherein the container is closed by a lid and contains a coating composition having a Rotothinner mid-shear viscosity of from 5 to 130 Pa.s at 20° C and an ICI Cone & Plate high shear viscosity of from 0.03 to 0.1 Pa.s at 25° C.  
   
   
       11 . A container according to  claim 10  wherein the Rotothinner mid-shear viscosity of the coating composition is at least 60 Pa.s at 20° C. and its ICI Cone & Plate high shear viscosity is at least 0.7 Pa.s at 25° C.  
   
   
       12 . A container as claimed in  claim 10  or  claim 11  wherein the coating composition contains a biocide of the type used in the preservation of wood.  
   
   
       13 . A method for applying a coating composition ( 5 ) to a rough surface using a roller wherein 
 a) a coating composition is selected which composition has a Rotothinner mid-shear viscosity of from 5 to 130 Pa.s at 20° C. and an ICI Cone & Plate high shear viscosity of from 0.03 to 0.1 Pa.s at 25° C.;    b) the composition is supplied in a container provided with a grid (c) according to any one of  claims 1  to  9 ;    c) the roller is inserted into the coating composition and withdrawn bearing an excess loading of composition;    d) the withdrawn roller is rolled across the grid whereupon excess composition is removed and    e) after removal of the excess composition, the roller is rolled across the rough surface whereupon composition is transferred from the roller to the surface.    
   
   
       14 . A method according to  claim 13  wherein the coating composition has a Rotothinner mid-shear viscosity of at least 60 Pa.s at 20° C. and an ICI Cone & Plate viscosity of at least 0.7 Pa.sec at 25° C.  
   
   
       15 . A method according to  claim 13  or  claim 14  wherein the coating composition contains a biocide of the type used in the preservation of wood.