Resins and adhesive formulations therewith
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.