Resin Acid

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Resin Acid

 

any of the isomeric cyclic carboxylic acids with the general formula C19H29COOH. The category also includes the dihydro, tetrahydro, and dehydro derivatives—C19H31COOH, C19H33COOH, and C19H27COOH-of the acids. Resin acids are found in significant quantities in soft resin (60–65 percent), tall oil (30–60 percent), and rosin (80–95 percent), which is obtained by processing tall oil or soft resin. For example, there are nine resin acids in the soft resin of the Scotch pine, among them abietic acid and L-pimaric acid. Resin acids are used in industry usually in the form of rosin and such rosin derivatives as esters.

References in periodicals archive ?
In one embodiment, a rubber composition includes at least one elastomer, from about 30 phr to about 120 phr silica reinforcing filler, from about 0 phr to about 30 phr carbon black reinforcing filler, from about 3 phr to about 10 phr of rosin acid, and from about phr to about 7 phr of zinc oxide, provided that no free stearic acid is separately included in the rubber composition.
A salt of rosin acid can overcome the disadvantages of the traditional nucleating agent [8].
In this regard, a series of samples of iPP with different amounts of two kinds of salt of rosin acid as nucleating agents were prepared, the nonisothermal crystallization and melting behavior of the iPP were studied and the kinetic parameters of the crystallization were obtained with Jeziorny's methods.
A typical process for the preparation of salts of rosin acid is as follows.
Strongly stable in both acid and alkaline media, this rosin acid dispersion is said to offer unique properties to the formulator or as a wetting agent where non-foaming is critical, according to the company.
It is composed of rosin acids such as abietic-type resin acid possessing conjugated double bonds and pimaric-type resin acid with nonconjugated double bonds [31].
FTIR spectroscopy helps in the confirmation of reduction of gum rosin acids into gum rosin alcohols.
The XRD patterns of psyllium, gum rosin acids, gum rosin alcohols, and (Psy-GrA)-cl-poly (AA) are shown in Fig.
Tenders are invited for Supply Of Soap Flakes Chips Or Threaded For Deep Drawing Operation Contain Total Fatty Matter 75 Percent Min By Mass And Other Parameters I) Rosin Acids, Ii) Unsaponified Fatty Matter, Iii) Free Caustic Alkali, Iv) Matter Insoluble In Alcohol, V) Glycerol, Vi) Hexabromide Test (On Fatty Acids), Vii) Chlorides (As Sodium Chloride
[5] Miller, Jeffrey J., 2007, "Metallic soaps of modified fatty acids and rosin acids and methods of making and using same," U.S.
The topics are the use of rosin acids as rigid building blocks in the synthesis of curing agents for epoxies, preparing and characterizing epoxy binders based on rosin, thermosetting polymers based on rosin and turpentine feedstock chemicals, rosin-derived polymers and their progress in controlled polymerization, synthesizing and applying rosin-based surfactants, and the biological activity of rosin derivatives.
When flakes of softwood are exposed to heat during the press cycle, and at temperatures as low as 90 [degrees]C, losses in lignin, holocellulose, and acetyls combined with a general degradation of the hemicellulose to various sugars results in a complex mixture of acids generally described as decarboxylated rosin acids (Hawley's Condensed Chemical Dictionary 2002, Kolin and Dannon 1998).