Joint sealant composition

Abstract

A single component liquid hot pour type coal tar pitch vinyl chloride composition which is fluid prior to use and is subsequently heated and flowed into a concrete joint or the like where it forms an elastic adherent seal.

What is claimed is: 
     
       1. A single component liquid hot pour type joint sealant composition comprising, about 2 to 25% vinyl chloride resin, and a liquid coal tar pitch component consisting essentially of a pitch fraction having a boiling point of between about 355° C. and about 450° C. 
     
     
       2. A composition as defined in claim 1, and a pitch fraction having a boiling point of above about 450° C., said last named fraction constituting up to about 25% of the total pitch fractions. 
     
     
       3. A composition as defined in claim 2, and a pitch fluidizing agent containing not more than about 14% by weight based on said pitch fractions of naphthalene and substituted naphthalene compounds which have a boiling point of below about 315° C. 
     
     
       4. A composition as defined in claim 3, wherein said agent contains not more than about 6% by weight based on said pitch fractions of naphthalene and said substituted naphthalene compounds. 
     
     
       5. A single component liquid hot pour type joint sealant composition .[.comprising,.]. .Iadd.consisting essentially of .Iaddend.about 2 % to 25% vinyl chloride resin .[.and.]..Iadd., .Iaddend.a liquid coal tar pitch component .[.comprising a coal tar pitch selected from the group consisting of pitch fraction having a.]. boiling .[.point of .]. approximately .Iadd.from .Iaddend.355° C. to 450° C., and a pitch fluidizing agent as required to produce fluidity .Iadd.with said fluidizing agent .Iaddend.containing not more than about 14% by weight.Iadd., .Iaddend.based on said pitch.Iadd., .Iaddend.of naphthalene and substituted naphthalene compounds which .[.have a boiling point of .]. .Iadd.boil .Iaddend.below about 315° C. 
     
     
       6. A composition as defined in claim 5, wherein said substituted naphthalene compounds are methyl-substituted naphthalenes. 
     
     
       7. A composition as defined in claim 5, wherein said plasticizer contains not more than about 6% based on said pitch of said naphthalene and substituted naphthalene compounds. 
     
     
       8. A composition as defined in claim 3, and comprising, the following ingredients and approximate proportions:   ______________________________________                                    
                       Parts by weight                                    
______________________________________                                    
Vinyl chloride resin     8                                                
Filler                   22                                               
Coal tar pitch fraction, boiling between about                            
 355° C. and 450° C.                                        
                         42                                               
Coal tar pitch fraction, boiling above about                              
 450° C.          14                                               
Pitch fluidizing agent   14                                               
                         100                                              
______________________________________                                    
     
     
     
       9. A composition as defined in claim 8, wherein said plasticizer is dibutyl phthalate. 
     
     
       10. The method of producing a stable single component liquid composition adapted upon subsequent heating to form a coal tar pitch vinyl chloride resin joint sealant compound, comprising, mixing vinyl chloride resin and a liquid coal tar pitch component including pitch and fluidizing said component by selecting at least about 75% of said pitch a liquid pitch fraction having a boiling point of between about 355° C. and 450° C. 
     
     
       11. The method as defined in claim 10, and supplementing the fluidizing action of said liquid pitch fraction with a fluidizing agent containing not more than about 14% by weight based upon said pitch of naphthalene and substituted naphthalene compounds boiling below about 315° C. 
     
     
       12. The method of producing a stable single component liquid composition adapted upon subsequent heating to form a coal tar pitch vinyl chloride resin joint sealant compound comprising, mixing at a temperature below fluxing vinyl chloride resin and a liquid coal tar pitch component comprising a coal tar pitch selected from the group consisting of pitch fraction having a boiling point of approximately 355° C. to 450° C. and a pitch fraction having a boiling point above 450° C. and a plasticizer as required to produce fluidity and containing not more than about 14% by weight based on said pitch of naphthalene and substituted naphthalene compounds having a boiling point of below about 315° C. 
     
     
       13. The method as defined in claim 12, wherein said plasticizer contains not more than about 6% based on said pitch of said naphthalene and substituted naphthalene compounds.