Abstract: A method for the preparation of an adhesive with an improved high temperature shear strength is disclosed. The method comprises the steps of blending a styrene homopolymer with a tackifier resin to form a resin blend and combining the resin blend with an elastomer. An adhesive with improved high temperature shear strength is also disclosed.

Abstract: A method of purification for anethole which involves forming an aqueous emulsion of crude anethole and crystallizing anethole from the emulsion. The process provides a purified anethole having improved odor and taste.

Abstract: A novel copolymer resin which has excellent tackifying properties for selected elastomers useful in hot melt and pressure sensitive adhesives is produced by the copolymerization of beta-pinene with other terpenes or hydrocarbon monomers, followed by thermal catalytic isomerization of the resin produced. Typically, beta-pinene and styrene (80/20) are copolymerized at a temperature between 0.degree. to 60.degree. C. under anhydrous conditions with a Lewis acid catalyst in a solvent. After catalyst removal, the copolymer resin is isomerized with iodine as a catalyst at a temperature between 200.degree. to 260.degree. C. Excellent yields of high softening point tackifier resins are produced.

Abstract: A resinous composition useful as a tackifier for hot melt and pressure sensitive adhesives is produced by the cationic copolymerization of an isomerizate of turpentine or alpha-pinene and a vinyl benzene derivative.

Abstract: Distilled tall oil fatty acids are improved by irradiation which isomerizes trans-dimethoxystilbene (trans-DMS) impurity to cis-dimethoxystilbene which is easily removed by fractional distillation. Thus, the trans-DMS is removed without loss of fatty acid components from the distilled tall oil fatty acid.

Abstract: Resins prepared by cationic polymerization of pure or combined feeds of C.sub.5 -C.sub.10 hydrocarbons are decolorized by use of iodine or bromine or their compounds. Activation by heat or radiation is usual. The decolorizing agents may be added prior to or during the polymerization process or to the polymerized resin before or after isolation.

Abstract: Glycerol esters of modified rosin are useful tackifiers in rubber adhesive compositions. Esters made with rosin modified by reducing the abietic acid concentration to 5% or less, will retain tackifying properties for longer periods in storage before use. The esters are prepared by simultaneously disproportionating and esterifying unmodified rosin with glycerol in the presence of p-t-amyl phenol and phosphoric acid, for example.

Abstract: Inert esters of rosin and a primary polyhydric alcohol, such as rosin-pentaerythritol esters, are modified by reacting commercially available rosin esters which contain residual hydroxyl groups with a lower aliphatic carboxylic acid or anhydride, for example, acetic anhydride or propionic anhydride, to substantially completely esterify the residual hydroxyl groups. The resulting inert, completely esterified rosin esters, when formulated with non-polar natural rubber or SBR in adhesive systems, results in a time-stable tack value not available with conventional rosin esters.

Abstract: A urethane-modified ester of rosin and a primary polyhydric alcohol has negligible hydroxyl content and is particularly useful as a polar tackifier in an adhesive composition made with a polar elastomer. The modified ester is prepared by reacting a rosin ester, for example, a rosin-pentaerythritol ester which contains some residual hydroxyl groups with a suitable isocyanate or diisocyanate.

Abstract: Additives to tall oil pitch react to cause crosslinking which improves hardness, viscosity, tackiness, etc., properties of the modified pitch. Additives include for example maleic anhydride, wood flour, formylated melamine, phenol and other resins, diisocyanates, alcohols and the like. The modified pitch has properties improved for use as binders for briquetting adhesives, etc.

Abstract: There are provided oxygen stable rosin-primary polyhydric alcohol esters and a process for esterifying a rosin with a primary polyhydric alcohol in the presence of catalytic amounts of an arylsulfonic acid added either simultaneously or subsequent to the initial rosin-polyhydric alcohol reaction to complete esterification and to obtain a rosin ester having markedly improved oxidation stability and good color.

Abstract: There is provided a process for cationically polymerizing piperylene batchwise or continuously by the addition of piperylene either alone or in admixture with a minor amount of at least another hydrocarbon monomer, incrementally, to a catalyst system consisting essentially of a major amount of an aluminum halide and a minor amount of an inorganic phosphorus acid in an inert solvent while controlling the temperature of reaction in the range of 0.degree. C. to 50.degree. C., drowning the polymerization mixture in water, separating the organic phase therefrom, then removing the solvent and recovering a solid polymer in good color and yield, free from an intractable gel, rendering the same useful as a tackifying resin.

Abstract: There is provided a process for polymerizing .alpha.-pinene by adding the same incrementally to a catalyst system comprising a major amount of an aluminum halide and a minor amount of an organo germanium halide or alkoxide in admixture with a (lower) alkyl, alkenyl or aralkyl halide in an inert solvent while controlling the temperature of reaction in the range of -30.degree. C. to +30.degree. C., drowning the polymerization mixture in water, separating the organic phase therefrom, removing the solvent therefrom, and recovering a solid polymer in good yield.

Abstract: There is provided a process for preparing the reaction product of maleic anhydride with a non-conjugated monocyclic terpene in the presence of controlled amounts of iodine to attain a mixture of more than 15% di-adduct and the balance of said mixture being mono-adducts.

Abstract: There is provided a process for cationically polymerizing piperylene batchwise or continuously by the addition of piperylene either alone or in admixture with a minor amount of at least another hydrocarbon monomer, incrementally, to a catalyst system consisting essentially of a major amount of an aluminum halide and a minor amount of an inorganic phosphorus acid in an inert solvent while controlling the temperature of reaction in the range of 0.degree. C. to 50.degree. C., drowning the polymerization mixture in water, separating the organic phase therefrom, then removing the solvent and recovering a solid polymer in good color and yield, free from an intractable gel, rendering the same useful as a tackifying resin.

Abstract: There are provided resinous terepene maleimides useful as tackifiers for elastomers and prepared by reacting at tempertures between 140.degree. C. and 200.degree. C. substantially equimolar amounts of (a) non-conjugated monocyclic terpenes or mixtures thereof and (b) maleic acid anhydride in the presence of from 0.05% to 0.15% iodine, based on the weight of the terpene, recovering a mixture of not less than 95% mono-adduct and not more than 15% di-adduct of terpene maleic adduct, further reacting said adduct mixture with stoichiometric amounts of an aliphatic polyamine, and recovering terpene maleimide having a number average molecular weight between about 500 and about 600.

Abstract: There is provided a novel catalyst system and a process for polymerizing olefins by adding the same incrementally to said catalyst system consisting essentially of an aluminum halide and an organo germanium halide or alkoxide in an inert solvent while controlling the temperature of reaction in the range of -30.degree. C to +30.degree. C, drowning the polymerization mixture in water, separating the organic phase therefrom, removing the solvent therefrom, and recovering a solid polymer in good yield.

Abstract: There is provided a process for polymerizing .alpha.-pinene by adding the same incrementally to a catalyst system comprising a major amount of an aluminum halide and a minor amount of an organo germanium halide or alkoxide in admixture with a (lower) alkyl, alkenyl or aralkyl halide in an inert solvent while controlling the temperature of reaction in the range of -30.degree. C. to +30.degree. C., drowning the polymerization mixture in water, separating the organic phase therefrom, removing the solvent therefrom, and recovering a solid polymer in good yield.

Abstract: There is provided a process for preparing the reaction product of maleic anhydride with a non-conjugated mono-cyclic terpene in the presence of controlled amounts of iodine to attain a mixture of not more than 15% di-adducts and the balance of said mixture being mono-adducts.

Abstract: Terpene polymer compositions that have softening points in the range of 0.degree. C. to 85.degree. C. and that are useful as components of hot melt coating compositions, adhesives, and the like, are copolymerized employing from about 20% to 80%, oligomers of cyclic monoterpene hydrocarbons, such as dipentene dimer and/or trimer, and from 80% to 20% of a terpene monomer, such as .beta.-pinene, dipentene or mixtures thereof, said percentages being by weight.