Rosin blend

Removes rosin-blend fluxes while preventing white residue formation... 

AsahiKlin AK-225T/ Asahi Glass Co. AK-225 AES and cyclohexane Removes rosin-blend fluxes while preventing white residue formation 63 54 17.6 47.2 None 427(37 C)... 

Rosin ester resins are used extensively in pressure-sensitive adhesives as tackifiers. The adhesive is formulated by blending the resin with a polymer in solution or as aqueous emulsions. Typical compositions may contain about 50% resin. The glycerol or pentaerythritol esters of stabilized rosins are often used because they are stable on aging. 

Standard-grade PSAs are usually made from styrene-butadiene rubber (SBR), natural rubber, or blends thereof in solution. In addition to rubbers, polyacrylates, polymethylacrylates, polyfvinyl ethers), polychloroprene, and polyisobutenes are often components of the system ([198], pp. 25-39). These are often modified with phenolic resins, or resins based on rosin esters, coumarones, or hydrocarbons. Phenolic resins improve temperature resistance, solvent resistance, and cohesive strength of PSA ([196], pp. 276-278). Antioxidants and tackifiers are also essential components. Sometimes the tackifier will be a lower molecular weight component of the high polymer system. The phenolic resins may be standard resoles, alkyl phenolics, or terpene-phenolic systems ([198], pp. 25-39 and 80-81). Pressure-sensitive dispersions are normally comprised of special acrylic ester copolymers with resin modifiers. The high polymer base used determines adhesive and cohesive properties of the PSA. 

Their compn was modified by Guttler in 1897 by incorporating 0.5 to 10% of powdered rosin (colophany). According to Colver (Ref 2), some Plastomenites consisted of DNT 80 and Nitrolignine 20% (blended in a hot condition), and occasionally, some Ba nitrate. After the incorporation, the fused mass was granulated Refs. 1) Daniel (1902), 634 2) Colver (1918),... 

Pressure-sensitive tape Pressure-sensitive tape, consisting of a coating of a blend of NR and an ester of glycerol and abietic acid (rosin) on cellophane, was developed over... 

As the cylinder rotates in the press, the lower part of the cylinder is flooded with ink having a viscosity in the low centipoise range. The press ready ink may contain 7% pigment, 18% binder, such as modified rosins, nitrocellulose or a synthetic resin and 75% solvent. The solvents are usually blends of such materials as aliphatic hydrocarbons in the heptane range, toluene, acetates and alcohol. Water based systems are used in a number of applications. 

One application area between 1962 and 1979 that has an impact on today s problems is the manufacture of wallboard. Wallboard was prepared by sandwiching a gypsum mixture between heavy papers. A typical core consists of gypsum, starch, potash, a pulp slurry, an asphalt or rosin-size emulsion, and gauging water (i.e., a colloidal silica plus polymer binder system). The mixture is blended together and placed between liners made on linerboard machines. 

Dry Size. [Hercules] Rosin/paraffin wax blend size for paper/paperboard mfg. 

Drying sealants are represented by solutions of rubber blends in organic solvents. As soon as the solution is impregnated into the clearance and the solvent evaporates, the sealant becomes rubbery and gains elasticity. The original compositions contain adhesive additives (coumarone, terpenic and phenolic resins, rosin or its esters), PI and solvents (toluene, xylol, benzine, etc.), fillers (chalk, titanium dioxide, talc, etc.) and stabilizers. These compositions can be easily impregnated with Cl [15]. 

Destructive distillation of rosin yields a fraction above 360 C of rosin oil (8002-16-2). It is used to blend with turpentine and as a plasticizer for rubber. 

Solvents, like contaminants, may be polar or nonpolar. As a general rule, polar solvents dissolve polar residues while nonpolar solvents dissolve nonpolar residues. Thus, ionic residues such as chlorides, salts, acids, acid fluxes, and alkalis are best dissolved and removed with polar solvents such as water, isopropyl alcohol, ethanol, or methylethyl ketone. Greases, oils, silicones, rosin flux, and low-molecular-weight monomers are best dissolved and removed with solvents such as hydrocarbons, Freons , hydrochloro-fluorocarbons, xylene, terpenes, and naphtha. To remove both polar and nonpolar residues, a two-step process using both types of solvents may be used or, more conveniently, an azeotrope mixture of the two solvents can be used in a one-step process. Most of the chlorofluorocarbon solvents (Freons ) and their azeotropes with alcohols, methylene chloride, or ketones are being phased out due to their high ozone-depletion potentials. Solvent blends and azeotropes of hydro-fluoroethers and hydrochlorofluorocarbons (HCFC) are now replacing these solvents. 

Maleopimaric acid and its anhydride were converted into the corresponding peroxides with the aid of an organic peroxide and used as reactive compatibilizers in the extrasion of polyethylene and polyamide 6 [ 102], The ensuing blends showed improved mechanical propaties conpared with those of physical mixtures of the two polymers, suggesting that the rosin-based peroxide had indeed played an active role in enhancing the quality of the interface between the two polymers. 

Kundu A.K., Ray S.S., Adhikari B., Maiti S., Polymer blends. 2. Compatibility and thermal-behavior of blends of novolac and polyamideimide firom rosin, Eur. Polym. J., 22(5), 1986,369-372. 

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