Vinyl Ethers Application

From the portfolio of available vinyl ethers the higher boiling and the difunctional vinyl ethers are preferred in coatings applications.

Vinyl ethers application.

Vinyl ethers 1 x ch 2 a o can be very effective addition fragmentation chain transfer agents. It is used as a synthetic building block and a monomer. Polyvinyl ethers are a class of organic polymers derived from vinyl ethers common monomers include methyl vinyl ether and ethyl vinyl ether the polymer having the formula ch 2 ch or n r methyl ethyl. It is the simplest enol ether that is liquid at room temperature.

Vinyl ester resins are produced by the reaction esterification between an epoxy resin and an unsaturated monocarboxylic acid. Well optimized catalysts produce vast quantities of isotactic polypropylene in which the side chains all face the same way. Vinyl esters also use peroxides e g. Low molecular weight vinyl ethers are versatile monomers for polymerization.

However it is challenging to incorporate these substrates in transition metal catalyzed olefin polymerization due to various side reactions such as cationic. The electron rich nature of vinyl ethers ch2 chor enables their versatile reactivity patterns with transition metal catalysts. Vinyl ethers undergo homopolymerization via a cationic mechanism. 8 21 227 228 the mechanism for chain transfer is shown in scheme 9 for the case of α benzyloxystyrene 15 the driving force for fragmentation is provided by formation of a strong carbonyl double bond.

Ethyl vinyl ether is an organic compound with the chemical formula ch 3 ch 2 och ch 2. Usage of calcium carbide for vinylation reaction is a rapidly expanding area with numerous research efforts to produce ves from alcohols thiols amines among many other examples 69 71 74. Many different vinyl ethers are commercially available today. Essentially they comprise a base of polyester resin strengthened with epoxy molecules in the backbone of the molecular chain.

Certain vinyl ethers obtained through the carbide route can be utilized as monomers in polymerization by cationic and free radical mechanisms. 1930s based on the reppe reaction of acetylene with alcohols. Vinyl ethers undergo radical initiated copolymerization in the presence of specific monomers such as maleates fumarates and acrylics. Furthermore they are highly attractive monomers for the synthesis of many polymers and copolymers.

Vinyl ether hydroxy vinyl ethers prior art date 1950 03 02 legal status the legal status is an assumption and is not a legal conclusion. Add an oxygen into the monomer though and that degree of uniformity becomes harder to enforce. Teator and leibfarth report a general protocol to polymerize a variety of such vinyl ethers isotactically see the perspective by foster and o reilly. They are increasingly used in radiation curing systems because of a lower toxicity profile than the commonly used acrylic monomers.