Damar resin

Dammar Resin Damar Gum Damar Resin Dammar... 

Isophorone [14.268], [14.269] is an unsaturated cyclic ketone. It consists of a-isophorone [78-59-1] (3,5,5-trimethyl-2-cyclohexen-l-one), which contains about 1-3% of the isomer P-isophorone [471-01-2] (3,5,5-trimethyl-3-cyclohexen-l-one). Isophorone is a stable, water-white liquid with a mild odor that is miscible in all proportions with organic solvents. It dissolves many natural and synthetic resins and polymers, such as poly(vinyl chloride) and vinyl chloride copolymers, poly(vinyI acetate), polyacrylates, polymethacrylates, polystyrene, chlorinated rubber, alkyd resins, saturated and unsaturated polyesters, epoxy resins, cellulose nitrate, cellulose ethers and esters, damar resin (dewaxed), kauri, waxes, fats, oils, phenol-, melamine-, and urea-formaldehyde resins, as well as plant protection agents. However, isophorone does not dissolve polyethylene, polypropylene, polyamides. 

Methyl acetate [79-20-9] is partially miscible with water and readily miscible with most organic solvents. It has a good solvency for cellulose esters and ethers, colophony, urea, melamine-, and phenol-formaldehyde resins, poly(vinyl acetate), alkyd resins, ketone resins, and other resins. It does not dissolve shellac, damar resin. 

Isobutyl acetate [110-19-0] is a colorless, neutral liquid with a pleasant, fruity odor. It is miscible with organic solvents, but immiscible with water. Isobutyl acetate has a high solvency for cellulose nitrate, colophony, damar resin, ketone and ketone-formaldehyde resins, maleate resins, urea and melamine resins, and phenolic and alkyd resins. Polymers such as polystyrene, poly(vinyl ethers), poly(vinyl acetate), polyacrylates, chlorinated rubber and vinyl chloride copolymers, as well as fats, greases, and oils are readily dissolved. Postchlorinated poly(vinyl chloride) is less soluble. Polyisobutene, cellulose ethers, polymethacrylates, poly(vinyl butyrals), natural rubber, and manila copal are swollen. Shellac, cellulose acetate, cellulose acetobutyrate, poly(vinyl chloride), and poly(vinyl formal) are insoluble. 

Methyl glycol [109-86-4] (2-methoxyethanol, ethylene glycol monomethyl ether) has a slight odor, and is miscible with water and organic solvents except aliphatic hydrocarbons. It is a very good solvent for many natural and synthetic resins. It does not dissolve fats, oils (except castor oil), damar resin, rubber, bitumen, hydrocarbon resins, polystyrene, poly(vinyl chloride), and vinyl chloride copolymers. On account of its teratogenic properties it is replaced as a solvent in the paint and colorants sector by other solvents or solvent mixtures. 

Z Jafarsidik, J. (1987) Damar resin-producing tree species and their distribution in Indonesia. Duta Rimba, 13, 7. 

A different reason for appropriating a material object comes from the kauri (Agathis alba) and merkus (Pinus merkusii) pine forests of Malaysia. Local people collect soft resin from these trees and sell it as a cash crop. Under the name Malay damar, this exudate is exported as a valued ingredient for high quality varnishes. 

Do assassin bugs really collect damar for its chemicals The resin serves their needs because it does not harden quickly but remains soft and sticky. Softness and stickiness are physical properties, but they are also direct consequences of the resin s chemical composition. It seems fair to credit the bugs employment of damar to its complex mix of chemicals. We could also ask whether green lacewing larvae appropriate aphid wool for its chemicals. In that case, the significance of chemical properties appears unequivocal, as the ants chemical sense evidently equates the waxy wool with aphids. 

Damar. gum A resin derived from various evergreen trees of the genus aga-this, In Australia, New Zealand and the West Indies. Used mostly for making a colorless varnish. 

S08. Damar, Gum Damar Dammar resin Damar-Resinons exudate from a species of Sborea. Dipterocarpaceae. Habit, East Indies, Philippines. Canstit. Volatile oil, resins, bitter substance. 

Dammaranes exemplified by (+)-dammara-20,24-diene-3p,20if-diol and its (+)-20)S-diastereomer belong to the constituents of the yellowish-white gum damar, the resinous exudate of the south-east Asian damar tree Shorea wiesneri (Dipterocar-... 

The most important active natural resins are shellac, colophony, damar and copal, which contain active groups like COOH, OH or double bonds. 

Batavia dammar or damar bo- ta-ve-9 da-mor (1698) n. Gum or resin exported from Batavia (now called Jakarta), Indonesia. Batavia dammar has two subgrades Padang or Sumatra. 

Dammar (Damar) da-m9r [Malay] (1698) n. Natural resinous exudation from trees of the Dipterocarpaceae family, which grow... 

Linseed, Cottonseed, Castor, Tung, Soybean, Oiticica, Perilla, Menhaden, Sardine, Corn, Safflower, Vernonia Fossil resins-Amber, Kauri, Congo Oleoresins-Damar, Ester Gum... 

Natural Resins Resins from trees, plants, fish and insects. Examples damars, copals. 

Dammar (Damar) da-mor n [Malay] (1698) Natural resinous exudation from trees of the Dipterocarpaceae family, which grow chiefly in the East Indies (now Indonesia) and Malaya. Very pale in color (practically colorless to deep yellow). Soluble in hydrocarbons without the necessity of running. Average acid value of 30. A fossil resin used as an ingredient in printing ink varnishes. 

Since Maly first esterified rosin in 1865, practically every conceivable ester of rosin has been prepared, including the glycerol ester, called ester gum, introduced in 1900 for lacquers and printing inks. The methyl ester of hydrogenated rosin is used as a plasticizer in lacquers. Pentaerythritol esters, unmodified and modified with maleic anhydride and phenol-formaldehyde, are used in varnishes. In 1937, the coatings industry used 20 million pounds of phenolic resins modified with ester gum in 1987,66 million pounds were used. Phenolic resins modified with up to 80% ester gum were called 4-hour enamels. Because these enamels possess excellent resistance to hot water and alkali, ester gum replaced damar, copal, and kauri gums in paints, lacquers, and enamels in combination with tung oil. 

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