Composition

Abstract

A composition for application to a substrate is provided. The composition comprises a base component and an activator component. The base component comprises hydroxyl functional prepolymers and the activator comprises isocyanate prepolymers. The composition further comprises an amount of carbon fibre. The hydroxyl functional prepolymers are formulated to polymerise with the isocyanate prepolymers to form a polymer containing carbon fibre.

1 . A composition for application to a substrate, the composition comprising a base component and an activator component, wherein the base component comprises hydroxyl functional prepolymers and the activator comprises isocyanate prepolymers, wherein the composition further comprises an amount of carbon fibre, and wherein the hydroxyl functional prepolymers are formulated to polymerise with the isocyanate prepolymers to form a polymer containing carbon fibre. 
     
     
         2 . The composition according to  claim 1 , wherein the carbon fibres present are 500   in length or less. 
     
     
         3 . The composition according to  claim 1 , wherein the carbon fibres present are between 5 and 25   in thickness. 
     
     
         4 . The composition according to  claim 1 , wherein the base component comprises the amount of carbon fibre, and wherein the carbon fibre content of the base component is between 5% and 40% of the base component by weight. 
     
     
         5 . The composition according to  claim 1 , wherein the base component comprises amine functional prepolymers. 
     
     
         6 . The composition according to  claim 1 , wherein the composition comprises a cure accelerator to accelerate curing of the composition. 
     
     
         7 . The composition according to  claim 1 , wherein the composition comprises a drying additive formulated to remove moisture from the composition, and wherein the composition comprises a catalyst which is formulated to accelerate the reaction between the hydroxyl functional prepolymers and the isocyanate prepolymers. 
     
     
         8 . The composition according to  claim 1  further comprising a substrate, wherein the composition has been applied to the substrate. 
     
     
         9 - 15 . (canceled) 
     
     
         16 . A method of applying a composition to a pipe, the method comprising:
 providing a composition, wherein the composition comprises a base component and an activator component, wherein the base component comprises hydroxyl functional prepolymers and the activator comprises isocyanate prepolymers, wherein the composition further comprises an amount of carbon fibre, and wherein the hydroxyl functional prepolymers are formulated to polymerise with the isocyanate prepolymers to form a polymer containing carbon fibre;   mixing the base component and the activator component to form a mixed composition;   applying the mixed composition to line a pipe.   
     
     
         17 . A method of manufacture of a composition for application to a substrate, the composition comprising a base component and an activator component, wherein the method comprises preparation of the base component in accordance with the following steps:
 a) introducing ingredients into a vessel, the ingredients including: an amount of polymer resin comprising hydroxyl functional prepolymers,   b) adding an amount of carbon fibre, and   c) mixing to disperse the carbon fibre in the mixture;   and wherein the method further comprises preparation of the activator component including providing a polymer resin comprising isocyanate prepolymers.   
     
     
         18 . The method according to  claim 17  wherein preparation of the base component comprises mixing the ingredients, prior to addition of the carbon fibre, at speeds of 250 to 10000 rpm, until a dispersion of 4-5 hegman is achieved. 
     
     
         19 . The method according to  claim 17 , wherein preparation of the base component further comprises adding an amount of thickener to the mixture. 
     
     
         20 . The method according to  claim 17 , wherein preparation of the base component further comprises adding an amount of cure accelerator and/or catalyst to the mixture. 
     
     
         21 . The method according to  claim 17  wherein preparation of the base component further comprises adding an amount of polymer resin comprising amine functional prepolymers. 
     
     
         22 . The method according to  claim 21  wherein the polymer resin comprising amine functional prepolymers is added after the carbon fibre has been fully dispersed. 
     
     
         23 . The method according to  claim 17  wherein preparation of the base component further comprises introducing one or more of the following additional ingredients at step a): a drying additive formulated to remove moisture from the composition, a mineral pigment, and a colour pigment. 
     
     
         24 . The method according to  claim 19  wherein the thickener is added after addition of the carbon fibre. 
     
     
         25 . The composition according to  claim 1 , wherein the carbon fibres present are 150   in length or less. 
     
     
         26 . The composition according to  claim 6 , wherein the cure accelerator is an amine based cure accelerator. 
     
     
         27 . The composition according to  claim 6 , wherein the cure accelerator is a tertiary amine based cure accelerator.