Vinyl acetate
- Vinyl acetate
- Ethenylester
- 1- Acetoxyethylen
- VAM
Colorless, light-sensitive, highly flammable liquid with a sweet odor
Liquid
0.93 g · cm -3
-110.2 ° C
72 ° C.
120 hPa ( 20 ° C)
- Poorly in water (20 g · l-1 at 20 ° C)
- Soluble in common solvents, such as ethyl acetate and ethanol
1.3956
Risk
2920 mg · kg -1 ( LD50, rat, oral)
-349.2 KJ / mol
Template: Infobox chemical / molecular formula search available
Vinyl acetate is a chemical compound selected from the group of carboxylic acid esters. It is in the form of a colorless liquid with a sweet odor. Vinyl acetate is chemically unstable, sensitive to light and tends to spontaneously polymerize.
History
The monomeric vinyl acetate was first prepared in 1912 by Fritz Klatte in Griesheim-Elektron.
Production and representation
Vinyl acetate can be produced by reaction of ethylene and acetic acid with oxygen in the presence of a palladium catalyst (for example, in a continuous, homogeneous gas -phase process ) in accordance with the Wacker process. The annual demand for vinyl acetate is in the United States, approximately 1.14 million tonnes ( 2005).
Properties
Physical Properties
Vinyl acetate having a viscosity of 0.43 mPa.s at 20 ° C, a specific heat of 1,926 kJ / (kg · K) at 20 ° C, a heat of vaporization of 379.3 kJ / kg, a polymerization of 1035.8 kJ / kg ( 76.8 ° C), a heat of combustion 2082.9 kJ / mol at 25 ° C. The vapors of vinyl acetate are 2.98 times heavier than air. Vinyl acetate forms an azeotrope with water which boils at atmospheric pressure at 66 ° C and contains 92.7% vinyl acetate.
Chemical Properties
Vinyl acetate polymerized very readily under the influence of various activators, such as light or peroxides, while also warming is sufficient. As it is an unsaturated ester, it allows a series of addition and transesterification reactions.
Use
Vinyl acetate is a monomer, and is primarily for the production of polyvinyl acetate and to a lesser extent vinyl acetate copolymers (such as ethylene vinyl acetates, or ethylene-vinyl alcohol copolymer ), and polyvinyl alcohol. These polymers are in the form of liquid dispersions, polymer powders, solid resins and solutions of their application, in particular as binders in construction, paint, and coatings sector and as raw material for adhesive, paper and textile industries.
Safety
Vinyl acetate 3 (substances which owing to possible carcinogenic effects in humans cause for concern ) classified as carcinogenic according to EC Category. Vinyl acetate in air can readily form explosive peroxides, which is suppressed by the addition of stabilizers (e.g., hydroquinone or methylhydroquinone in a concentration of 3 to 20 ppm).