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Tham khảo tài liệu 'coatings technology handbook 2010 part 10', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | 60-6 Coatings Technology Handbook Third Edition TABLE 60.3 Solubility of Butvar Resins Solvent Butvar Solutions Agitated at Room Temperature for 24 h 5 Solid Solution 10 Solids Solution B-72 B-73 B-74 B-76 B-79 B-90 B-98 Acetic acid glacial S S S Aceton I S SW Butyl acetate I S PS n-Butyl alcohol S S S Butyl cellusolve S S S Cyclohexanone S S S Diacetone alcohol PS S S Diisobutyl ketone I SW I N N-Dimethylacetamide S S S N N-Dimethylformamide S S S Dimethyl sulfoxide S S S Ethyl acetate 99 I S PS Ethyl acetate 85 S S S Ethyl alcohol 95 or anhydrous S S S Ethylene dichloride SW S SW Ethylene glycol I I I Isophorone PS S S Isopropyl alcohol 95 or anhydrous S S S Isopropyl acetate I S I Methyl acetate I S PS Methyl alcohol S SW S Methyl ethyl ketone SW S PS Methylene chloride PS S S Methyl isobutyl ketone I S I Naphtha light solvent I SW I N-Methyl-2-pyrrolidone S S S Propylene dichloride SW S SW Tetrachlorethylene SW SW SW Tetrahydrofuran S S S Toluene I PS SW Toluene ethyl alcohol 95 60 40 by weight S S S 1 1 1-Trichloroethane SW S SW Xylene I PS SW a Key S Completely soluble PS partially soluble I insoluble SW swells hazy turbid . Source Butvar Formvar Brochure publication no. 6.70E Monsanto Chemical Company Plastics and Resins Division St. Louis MO. Within a given chemical group increasing molecular weight results in a modest increase in tensile strength and modulus increased solution viscosity and a modest increase in solvent and chemical resistance. In general even the lowest molecular weight grades of these reins are high enough in molecular weight to be well within the chain entanglement region of the E spectrum such that physical properties do not change drastically as molecular weight increases. Molecular weight variations can be used effectively to control the rheology viscosity of coatings formulations more than the properties of the final coating. 60.3.3 Solution Viscosity Solution viscosity is a function of chemical composition molecular weight and .