The invention described herein comprises a two component sealant composition and process for applying the same for repair of ruptures, holes, cracks, etc. , in hoses, pipes, tires, etc. The first component is an alpha-cyanoacrylate glue which is applied as a layer covering the rupture or crack and after a very short period the second component, a powder, is applied to the surface of the alpha-cyanoacrylate. This second component comprises a polymerization initiator having hydroxyl and/or carboxylate groups therein, such as carbohydrates, i. e. , saccharides, etc. , hydrolyzed polyvinylacetate, etc. A particularly preferred initiator is alginate.
Method For Repairing A Rupture In A Metal Or Plastic Surface
In repairing a rupture as described herein the rupture is covered by a patch of metal or plastic sheet material which covers the rupture at least 1/2 inch beyond the rupture, then applying over the edge of the patch a layer of an alpha-cyanoacrylate which is liquid at 20. degree. C. and has the formula CH. sub. 2. dbd. C(CN)--COOR wherein R is a hydrocarbon radical selected from the group consisting of aliphatic, aromatic and cycloaliphatic hydrocarbon groups of 1-10 carbon atoms and alkoxy, chloro and fluoro derivatives of said hydrocarbon groups in which alkoxy groups there are 1-4 carbon atoms therein, this layer covering the adjacent areas of the covering patch and of the ruptured surface each for a distance of at least 1/4 inch from the edge of the covering patch and all around said patch and spreading on said added layer of alpha-cyanoacrylate a layer of a powdered solid selected from a group consisting of (i) a compound having hydroxyl, carboxylate or both hydroxyl and carboxylate groups therein and (ii) rubber.
The invention described herein comprises a two component sealant composition and process for applying the same for repair of ruptures, holes, cracks, etc. , in hoses, pipes, tires, etc. The first component is an alpha-cyanoacrylate glue which is applied as a layer covering the rupture or crack and after a very short period the second component, a powder, is applied to the surface of the alpha-cyanoacrylate. This second component comprises a polymerization initiator having hydroxyl and/or carboxylate groups therein, such as carbohydrate, i. e. , saccharides, etc. , hydrolyzed polyvinylacetate, etc. A particularly preferred initiator is alginate.