Abstract: Resin emulsions are prepared by forming an emulsion of an aqueous solution of an unsaturated material reactive with the resin in the liquid resin, causing the material and the resin to react and adding sufficient water to invert the emulsion to form an emulsion of the reacted resin in water to produce emulsions with improved mechanical stability useful as tackifiers in water-based pressure-sensitive adhesive coating materials in high speed coating lines giving reduced deposits and extended coating times.

Abstract: Dispersions of hydrophobic substance e.s. resin emulsions, usually having a relatively low average particle size can be continuously and speedily prepared by feed a hydrophobic substance in the liquid state into at least two static mixers, arranged in a series. The resin is introduced at a temperature above 50 degrees C. but below its degradation temperature of hydrophobic substance and water under pressure is introduced into the first mixer. The mixture of resin and water is passed to another mixer maintained at a temperature lower than that prevailing in the first mixer and below the boiling point of water. Optionally aqueous solution of surfactant under pressure instead of water is introduced into the first mixer and optionally aqueous surfactant is introduced into the second mixer.

Abstract: Petroleum resins having a softening point from 10.degree. C. to 80.degree. C. obtained from C.sub.5 olefins and diolefines and one or more monovinyl aromatic compounds which contain from 10 to 30 wt. % of the aromatic are useful as tackifiers for carboxylated styrene butadiene copolymer to produce pressure sensitive additives especially aqueous based adhesive when the resin is in the form of an emulsion which is also claimed.

Abstract: Petroleum resins having a softening point from 10.degree. C. to 80.degree. C. obtained from C.sub.5 olefines and diolefines and one or more monovinyl aromatic compounds contain from 10 to 30 wt. % of the aromatic are useful as tackifiers in a combination with carboxylated styrene butadiene copolymer to produce aqueous based pressure sensitive adhesives.

Abstract: Hydrogenated hydrocarbon resins from cyclopentadiene and/or substituted cyclopentadiene of softening point below 90.degree. C. and having a (Tg) as from 35 to 70 lower than the softening point with less than 12 wt. % of the resin having a molecular weight above 1000 are particularly useful as tackifiers in pressure sensitive adhesives especially in hydrogenated styrene/butadiene/styrene block copolymer adhesive formulations where their use can obviate the need for plasticizing oil.

Abstract: Resins having an improved combination of softening point and tackifying properties together with good color and heat stability are obtained by Freidel-Crafts copolymerization of a C.sub.5 /C.sub.6 unsaturated feed and 5 to 30 wt. % of para methyl styrene.

Abstract: Petroleum resins having a softening point from 10.degree. C. to 80.degree. C. obtained from C.sub.5 olefines and diolefines and one or more monovinyl aromatic compounds which contain from 10 to 30 wt. % of the aromatic are useful as tackifiers for carboxylated styrene butadiene copolymer to produce pressure sensitive additives especially aqueous based adhesive when the resin is in the form of an emulsion which is also claimed.

Abstract: Producing modified petroleum resins by the Friedel Crafts copolymerization of a C.sub.5 olefines and diolefines, C.sub.6 olefines or diolefines or a mixture of C.sub.5 and C.sub.6 olefines and diolefines feed and carene optionally together with a branched chain olefine.

Abstract: A resin suitable as a tackifier is prepared by polymerizing using a Friedel Crafts catalyst:(1) a petroleum resin feed comprising C.sub.5 olefins and diolefins, C.sub.6 olefins and diolefins or a mixture of C.sub.5 and C.sub.6 olefins and diolefins, said feed being obtained from the cracking of petroleum feedstock, and(2) an additive comprising vinyl norbornene or tetrahydroindene.The resin thus prepared may be mixed with a natural or synthetic rubber.

Abstract: Low softening point resins are prepared by a process which comprises polymerising using a Friedel Crafts catalyst:(1) a petroleum resin feed comprising C.sub.5 olefins and C.sub.5 diolefins or a mixture of C.sub.5 and C.sub.6 olefins and diolefins, said feed being obtained from the cracking of petroleum feedstock and being subjected to thermal soaking at a temperature of 100.degree. C to 150.degree. C, and(2) a branched chain reactive aliphatic olefin or an oxygenated transfer agent.Preferred additives are diisobutene or U.O.P. olefins. The polymerization may take place in the presence of a C.sub.8 to C.sub.10 unsaturated aromatic compound.

Abstract: A petroleum resin is prepared by a process which comprises polymerizing using a Friedel-Crafts catalyst:A. a petroleum resin feed comprising C.sub.5 and C.sub.5 diolefins, C.sub.6 olefins and C.sub.6 diolefins or a mixture of C.sub.5 and C.sub.6 olefins and diolefins, said feed being obtained from the cracking of petroleum feedstock andB. at least 0.5 wt.% based on the petroleum resin feed of a tertiary hydrocarbyl halide.The resulting resin usually has a softening point of 20.degree. to 125.degree. C. These resins have an extremely narrow molecular weight distribution and hence have good wax compatibility, viscosity, flexibility and tackifying properties for rubber.

Abstract: High softening point resins are prepared by a process which comprises polymerizing in the presence of a Friedel-Crafts catalyst a mixture of (1) a feedstock comprising C.sub.5 olefins and diolefins, C.sub.6 olefins and diolefins or a mixture of C.sub.5 and C.sub.6 olefins and diolefins, said feedstock being obtained from the steam-cracking of petroleum feedstock and (2) a polymer obtained by the thermal or cationic polymerization of dicyclopentadiene, an alkyl cyclopentadiene dimer, a codimer of cyclopentadiene with an alkyl cyclopentadiene, a codimer of cyclopentadiene or an alkyl cyclopentadiene with a C.sub.5 or a C.sub.6 conjugated linear or non-cyclic diolefin, or a mixture of said dimer and codimers. The resin may be mixed with rubber to make a pressure-sensitive adhesive.