Rosin-maleic anhydride adduct

EINECS 232-480-4 Gum rosin, maleic anhydride resin Rosin, maleated Rosin, maleic acid polymer Rosin-maleic anhydride reaction product Rosin, maleic anhydride adduct. 

Ray S.S., Kundu A.K., Maiti M., Ghosh M., Maiti S., Polymers from renewable resources. 7. Synthesis and properties of polyamideimide from rosin-maleic anhydride adduct, Angeiv. Makwmol. Chem., 122(JUN), 1984,153-167. 

Atta A.M., Nassar I.F., Bedawy H.M., Unsaturated polyester resins based on rosin maleic anhydride adduct as cotrosion protections of steel. React. Funct. Polym., 67 1), 2007,617-626. 

Rosin-maleic anhydride adduct (RMA) was prepared from rosin obtained from a commercial source following the method of Gosh et al jl. The details 6f the procedure have already been reported. ... 

Imidodicarboxylic acid from rosin maleic anhydride adduct (RMID) has been synthesized from RMA and amino benzoic acids by following the procedure reported earlier ... 

Rosin-maleic anhydride adduct is soluble in alcohol, acetone and other polar solvents. Characteristic properties of RMA are shown in Table 2. 

Resol Single Tg I was made from rosin maleic anhydride Diels-Alder adduct with 4,4 -diamincxiiphenylme1hane Kundu et al. (1986b)... 

The chemical reactivities of gum, wood, and tall oil rosin are significantly different due largely to their respective compositions. Table I shows typical chromatographic analyses of the three types of rosin C12. 13). It is interesting to note that the gum rosin contains the least amount of the inert dehydroabietic acid among the three types of rosin, and as expected, it exhibits the greatest adduct potential toward a dieneophile such as maleic anhydride. 

In addition to the above-mentioned oils there are also several naturally-occurring and synthetic acids which are used for modifying purposes in the manufacture of alkyd resins. These include rosin (the main constituent of which is abietic acid (XIX)) and the adduct of rosin and maleic anhydride (XXI) in the formation of this adduct it is supposed that abietic acid isomerizes to the conjugated diene, levopimaric acid (XX), before addition occurs. The synthetic fatty acids pelargonic acid (XXII) and isooctanoic acid (XXIII) are also sometimes used as modifying acids in the preparation of alkyd resins. 

Alkyds with either rosin-maleic acid, maleic anhydride, or fumaric acid adducts as the polybasic acids are used in many low-cost coating applications, but the films from these resins do not have the color retention, toughness, adhesion, gloss retention, or exterior durability that the phthalic anhydride alkyds have. 

Unmodified rosins combine with fumaric acid and maleic anhydride in accordance with the Diels-Alder reaction to form tribasic adducts. The resulting polybasic acids are often used instead of phthalic anhydride in the production of alkyd resins for low-cost coatings. These rosin-derived, nonphthalate alkyds are used to improve gloss and other properties and are suitable mainly for interior coalings. They do not possess the high degree of outdoor durability characteristic of alkyd resins derived solely from phthalic anhydride. 

Fortified size Rosin size that has been reacted with fumaric acid or maleic anhydride to form the Diels-Alder adduct The reaction product contains extra carboxyl groups and produces more eflident sizing response than the unreacted resin acids. It is used as a starting material for other size products. 

---