聚乙酸乙烯酯 VINNAPAS C 305

Technical data sheet for VINNAPAS® C 305 / Version: 1.1 / Date of last alteration: 16.09.2010 1 / 2 Product description VINNAPAS® C 305 is a solid, colorless to pale yellowish copolymer of vinyl acetate and crotonic acid. Properties VINNAPAS® C 305 is a physically drying, thermoplastic binder which forms films through solvent evaporation. When appropriate solvents are used, the dry films are odorless. Application Typical applications for VINNAPAS® C 305: - moisture-sensitive adhesives - finishes for the textile and hat industries - inks for fabrics, leather. Marks made with such inks can easily be removed with slightly alkaline water. - lacquers removable by aqueous alkali, often in combination with hard resins. - hairspray Processing Product data Melt viscosity, 100% Polymer Bohlin high temperature viscosimeter 100 °C ~ 7000 Pa·s 120 °C ~ 2000 Pa·s 140 °C ~ 300 Pa·s 160 °C ~ 80 Pa·s Solvents VINNAPAS® C 305 is soluble in esters, ketones and methanol. Solutions in 94% ethyl alcohol are turbid, but the films deposited from them are almost clear when dry. The resin is only partly soluble in toluene. Solutions with solids contents of up to 50% can be made with good solvents such as acetone and ethyl acetate. VINNAPAS® C 305 will dissolve in alkaline water, although this is a time-consuming operation resulting in high viscosity solutions. Solution may be speeded up by also using a water soluble solvent and using the following formulation as a guide: 40 parts VINNAPAS® C 305 35 parts water 10 parts conc. Ammonia 30 parts methanol Acetone may be used instead of methanol. The solution can be diluted by stirring in more water. An alternative method consists of dissolving the resin only in acetone and then diluting the resultant solution with water containing ammonia. Care should be taken not to exceed a pH value of 8 since otherwise, the resin will be partly saponified and the solution will gel. Dilute caustic potash and certain organic amines can also be used instead of ammonia. Sodium and calcium hydroxide are unsuitable for this purpose since insoluble salts are formed with sodium and calcium ions. Plasticizers VINNAPAS® C 305 may be plasticized with the plasticizers normally used for polyvinyl acetate, e. g. dibutyl phthalate and tricresyl phosphate. Resins VINNAPAS® C 305 is readily compatible with VINNAPAS® B 100 and VINNAPAS® UW 10, Phenolic Resin BKR 2620, Synthetic Resin SK and AP, Phthalopal PP, Epikote 1001 as well as low to high viscosity nitrocellulose, with all of which it may be blended. Compatibility with Plexigum MB 319, Staybelite Ester 5, Rocramar NN, Alkydal F 25 and Laroplal S is but limited. It is always advisable to check compatibility by lab tests in advance. Storage To prevent caking VINNAPAS® C 305 should not be stored at temperatures above 20°C. Storage conditions must be dry; material must be protected from direct sun exposure. Under these conditions the product has a shelf life of at least 12 months. Packaging VINNAPAS® C 305 is supplied in 25 kg Paper Bags. Big Bag is available on request. VINNAPAS® C 305 VINYL ACETATE COPOLYMER, CAS NO. 25609-89-6 Technical data sheet for VINNAPAS® C 305 / Version: 1.1 / Date of last alteration: 16.09.2010 2 / 2 Additional information If VINNAPAS® C 305 is used in applications other than those mentioned, the choice, processing and use of VINNAPAS® C 305 is the sole responsibility of the purchaser. All legal and other regulations must be complied with. Further information is available upon request. Safety notes Comprehensive instructions are given in the corresponding Material Safety Data Sheets. They are available on request from WACKER subsidiaries or may be printed via WACKER web site http://www.wacker.com. Product data Specification data Inspection Method Value 20 Acid number specific method 30 - 38 mg KOH/g 10 Viscosity (10% in ethyl acetate), 20 °C ASTM D 445 - 06 2,5 - 3,5 mPa*s Typical general characteristics Inspection Method Value 40 Efflux time DIN2431 4M approx. 26 s 70 Softening point DIN ISO 4625, by Ring and Ball approx. 95 °C 50 Density of the polymer DIN EN ISO 1183 /1-3 approx. 1,18 g/cm³ 30 Volatiles specific method < 0,5 wt. % 45 Supply form solid, colorless to pale yellowish flakes 60 K-value DIN 53726 29 - 33 80 Molecular weight (MW) SEC, PS-Standard approx. 45000 g/mol 90 Glass transition temperature DSC DIN EN ISO 11357-2 approx. 47 °C These figures are only intended as a guide and should not be used in preparing specifications. The data presented in this leaflet are in accordance with the present state of our knowledge, but do not absolve the user from carefully checking all supplies immediately on receipt. We reserve the right to alter product constants within the scope of technical progress or new developments. The recommendations made in this leaflet should be checked by preliminary trials because of conditions during processing over which we have no control, especially where other companies' raw materials are also being used. The recommendations do not absolve the user from the obligation of investigating the possibility of infringement of third parties' rights and, if necessary, clarifying the position. Recommendations for use do not constitute a warranty, either express or implied, of the fitness or suitability of the products for a particular purpose. The management system has been certified according to DIN EN ISO 9001 and DIN EN ISO 14001 WACKER is a trademark of Wacker Chemie AG. VINNAPAS® is a trademark of Wacker Chemie AG. For technical, quality, or product safety questions, please contact: Wacker Chemie AG Hanns-Seidel-Platz 4 81737 München, Germany info.polymers@wacker.com www.wacker.com