Resins and adhesive formulations therewith

Abstract

A process for producing rosin resins comprising reacting together rosin and phenolic compound and/or terpene-phenol resin, in the presence of a Brønsted acid. These resins may be used as tackifiers in adhesive formulations, including chloroprene contact cements.

1 . A process for producing a resin, the process comprising reacting together rosin and a co-reactant in the presence of a Brønsted acid, where the co-reactant is a phenolic compound or a terpene-phenol resin.  
     
     
         2 . The process of  claim 1  wherein rosin is reacted with a terpene-phenol resin.  
     
     
         3 . The process of  claim 2  wherein the terpene-phenol resin has a softening point of 125-150° C.  
     
     
         4 . The process of  claim 2  wherein rosin and terpene-phenol are reacted together in a rosin:terpene-phenol weight ratio of 40:60 to 60:40.  
     
     
         5 . The process of  claim 1  wherein rosin is reacted with phenol.  
     
     
         6 . The process of  claim 5  wherein rosin and phenol are reacted together in a rosin:phenol weight ratio of 70:30 to 90:10.  
     
     
         7 . The process of  claim 1  wherein rosin is reacted with C 1 -C 12  alkylphenol.  
     
     
         8 . The process of  claim 2  wherein a terpene selected from the group consisting of limonene, dipentene, α-pinene, β-pinene and δ-3-carene is used to prepare the terpene-phenol resin.  
     
     
         9 . The process of  claim 1  wherein the Brønsted acid is a sulfonic acid or a sulfuric acid.  
     
     
         10 . The process of  claim 9  wherein the sulfonic acid is para-toluene sulfonic acid.  
     
     
         11 . A resin produced by the process of  claim 1 , having a softening point of 115-150° C., an acid number of 10-85, a Mw of 550-1400, a Mn of 405-750, and a neat Gardner color of 6-12.  
     
     
         12 . The resin produced by the process of  claim 2 .  
     
     
         13 . The resin of  claim 2  having an acid number of 10-50.  
     
     
         14 . The resin produced by the process of  claim 4 .  
     
     
         15 . The resin of  claim 14  having an acid number of 30-85.  
     
     
         16 . An article of manufacture comprising chloroprene and a resin produced by the process of  claim 1 .  
     
     
         17 . An article of manufacture comprising chloroprene and a resin produced by the process of  claim 2 .  
     
     
         18 . An article of manufacture comprising chloroprene and a resin produced by the process of  claim 5 .  
     
     
         19 . A process for preparing a chloroprene cement comprising combining chloroprene, a metal oxide, hydrocarbon solvent, and the resin of  claim 12 .  
     
     
         20 . A process for preparing a chloroprene cement comprising combining chloroprene, a metal oxide, hydrocarbon solvent, and the resin of  claim 14.