Terpene resin- and hydrocarbon resin-based surfactants and acqueous disperson of tacifier resins

Abstract

A process for preparing a surfactant, useful for dispersing tackifier resins in aqueous media, comprises reacting an α,β-unsaturated carboxylic acid or anhydride, or an ester thereof, with a terpene- or hydrocarbon-based resin to form an adduct, then reacting the adduct with a polyalkylene polyol to yield the surfactant. In a related embodiment, the surfactant is subsequently functionalized. Also disclosed are surfactants prepared using a disclosed process; compositions comprising a disclosed surfactant and a tackifier resin; aqueous dispersions comprising a disclosed surfactant; tackifier resin and water; adhesive compositions comprising a disclosed aqueous dispersion and a polymer latex; and pressure sensitive adhesive overlays prepared using a disclosed adhesive composition.

1 . A process for preparing a surfactant comprising: 
 reacting an α,β-unsaturated carboxylic acid or anhydride, or an ester thereof, with a resin comprising hydrocarbon monomeric residues, to provide an adduct; and    reacting the adduct with either alkylene oxide or a carboxyl-reactive poly(alkylene oxide) to provide the surfactant.    
     
     
         2 . The process of  claim 1  wherein the resin is selected from the group consisting of a polyterpene resin, a terpene-phenol resin, a terpene-hydrocarbon resin, a terpene-vinylaromatic resin, a hydrocarbon resin, and a vinylaromatic-modified hydrocarbon resin.  
     
     
         3 . The process of  claim 1  further comprising modifying the surfactant by either phosphorylation or sulfonation to provide a functionalized surfactant.  
     
     
         4 . The process of  claim 1  wherein the α,β-unsaturated carboxylic acid is maleic acid, and the α,β-unsaturated carboxylic anhydride is maleic anhydride.  
     
     
         5 . The process of  claim 1  wherein the resin is a polyterpene resin having a softening point of about 10° C. to about 150° C.  
     
     
         6 . The process of  claim 1  wherein the resin comprises residues of at least one of α-pinene, β-pinene, limonene, dipentene, β-phellandrene, δ-3-carene, and δ-2-carene.  
     
     
         7 . The process of  claim 6  wherein the resin further comprises residues of at least one of isobutylene, a 1-alkene, a 2-alkene, a trisubstituted alkene, and vinylcyclohexene.  
     
     
         8 . The process of  claim 6  wherein the resin further comprises residues of at least one of piperylene, isoprene, 2-methyl-2-butene, 2-methyl-1-butene, cyclopentene, an acyclic pentene, cyclopentadiene, and dicyclopentadiene.  
     
     
         9 . The process of  claim 1  wherein the resin is a terpene-phenol resin and comprises residues of at least one of α-pinene, β-pinene, δ-3-carene and limonene.  
     
     
         10 . The process of  claim 9  wherein the terpene-phenol resin further comprises residues of at least one of styrene, indene, α-methylstyrene, an alkylaromatic styrene, divinylbenzene, a divinylbenzene with one or more alkyl groups, isobutylene, diisobutylene, a 1-alkene, a 2-alkene, a trisubstituted alkene, vinylcyclohexene, piperylene, isoprene, 2-methyl-2-butene, 2-methyl-1-butene, cyclopentene, an acyclic pentene, cyclopentadiene, and dicyclopentadiene.  
     
     
         11 . The process of  claim 9  wherein the phenol is selected from phenol, a monosubstituted phenol, a disubstituted phenol, a trisubstituted phenol and a hydroxyl-substituted naphthalene compound.  
     
     
         12 . The process of  claim 1  wherein the resin comprises residues of monomers selected from piperylene, isoprene, 2-methyl-2-butene, 2-methyl-1-butene, cyclopentene, an acyclic pentene, cyclopentadiene, and dicyclopentadiene.  
     
     
         13 . The process of  claim 1  wherein the adduct is reacted with poly(ethylene glycol) or a mixture of more than one poly(ethylene glycol).  
     
     
         14 . The process of  claim 13  wherein the polyethylene glycol has a molecular weight ranging from 1,000 to 20,000.  
     
     
         15 . The process of  claim 1 , wherein the adduct is reacted with ethylene oxide.  
     
     
         16 . The surfactant of any of claims  1 - 15 .  
     
     
         17 . A composition comprising the surfactant of any of claims  1 - 15  and a tackifier resin.  
     
     
         18 . An aqueous dispersion comprising water and the composition of  claim 17 .  
     
     
         19 . An adhesive composition comprising the surfactant of any of claims  1 - 15 , a tackifier resin, a polymer latex, and water.  
     
     
         20 . A pressure sensitive adhesive overlay prepared by applying a layer of the adhesive composition of  claim 19  to a surface of a substrate, and drying the layer.  
     
     
         21 . An adhesive composition comprising the surfactant of any of claims  1 - 15 .