Wood rosin

Resin acid Tall oil rosin Wood rosin Gum rosin... 

Natural resins Burgundy pitch Copal Dammar Japanese lacquer Pine rosin Wood rosin... 

Replacement, sulfonic add hydroxyl groups by chlorine, 32, 88 Rosin, wood, 32, 1... 

RosinCColophony, Common rosin, Wood Resin-Pine, Resin-Colophony)... 

Ricinoleoyl chloride, 37, 69 Ring contraction, 2-chlorocyclohex-anone into methyl cyclop en-tanecarboxylate, 39, 37 Rosin, wood, 32,1... 

Disproportionated rosin acid, sodium salt EINECS 263-144-5 Resin acids and Rosin acids, sodium salts Rosin acid, monosodium salt Rosin xids, sodium salt Rosin acids, sodium salts Rosin, disproportionated, sodium salt Rosin, sodium salt Rosin, sodium soap Sodium soap of disproportationed rosin Wood rosin, sodium salt... 

Synonyms gum rosin wood rosin tall oil rosin Rue Oil and Herb... 

Wood rosin. See Rosin Wood rosin, methyl ester. See Methyl abietate Woodruff. See Woodruff (As peru I a odorata) Woodruff (Asperula odorata)... 

Colophony (rosin) is a resin obtained from different species of coniferous trees. There are three types of colophony, depending on the method of recovery gum rosin, wood rosin and tail-oil rosin. Gum rosin is obtained from various species of living pine trees. The trees are tapped for oleoresin, which is then distilled to obtain turpentine as the distillate and gum rosin as the distillation residue. Wood rosin is produced from old pine stumps. Tail-oil rosin is obtained as a by-product in the sulphate pulping of coniferous wood. The supply of pine stumps for the production of wood rosin is decreasing and, today, the major types produced are gum rosin and tail-oil rosin. In technical literature, the term colophony corresponds to gum rosin. In dermatological literature, tail-oil rosin and wood rosin are also included in the term colophony , since the resins contain the same major chemical components and allergens and are used in various technical products, regardless of the source. In American literature, the term rosin is more frequently used. 

Unmodified Soldering fluxes, paper, depilatory waxes, cosmetics, dancers and string players rosin, wood and gum from pine trees... 

Colophony (rosin, pine rosin, wood rosin) is obtained from various species of pine tree. It has a complex chemical composition, of which about 90% is resin acids and the rest is corresponding esters, aldehydes and alcohols. Two main types of acids occur abietic acid with conjugated double bonds and pimaric acid with non-conjugated double bonds. Colophony is not used alone as a drying resin but is used to modify other resins, such as alkyds. Colophony is an important contact sensitizer, but the esterification of organic acids in colophony with alcohol groups in alkyd resins reduces its allergenicity. Rosin esters can be used in paints and varnishes (Mathias 1984 Fischer and Adams 1990 Sadhra et al. 1994). See the chapter on colophony in this book. 

Synonyms disproportionated rosin gum rosin wood rosin pine rosin... 

Properties Gum. a rosin Wood. a rosin Tall. a rosin Our sample... 

Rosin is a complex mixture of naturally occurring high molecular weight organic acids and related materials. Rosin obtained from various fractions of exudates of pine trees, known as gum rosin, wood rosin and tall rosin, is composed of about 90% resin acids and 10% neutral materials (Table 1). The resin acids are isomeric monocarboxylic acids of alkylated hydrophenanthrene nu-clei l 2. 

Pine trees provide the raw material for producing gum rosin, wood rosin, tall oil rosin, and pine tars, all used in rubber compounding. As a group, these chemicals are commonly referred to as naval stores because historically they were needed in the construction and maintenance of wooden ships. 

Many resins are used in making oleoresinous varnishes. These include polyterpene resins, petroleum resins, coumarone-indene resins, gmn rosins, wood rosins, tall oil rosins, rosin soaps, rosin esters, novolac phenolic resins and rosin modified phenolic resins. 

Sizes are additives that decrease the wettability of the paper for certain applications (printing with aqueous inks, manufacturing of milk cartons and paper cups). - Rosin (gum rosin, wood rosin or tall oil rosin) in the form of its sodium or potassium salt or as free acid are used as powder, solution or dispersion. They are excellent sizes, which are used together with alum to develop lull sizing power. Reaction products of rosin with maleic anhydride or fu-maric acid (fortified sizes) are more effective. They are saponified and used as pastes or dispersions. Free rosin emulsions are the newest and most effective sizes. For ordinary rosin 15-20 kg are necessary per mt of paper, fortified rosin requires 5-8 kg/mt and free rosin emulsion only 2-4 kg/mt to get the same effect. 

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