Vinyl Ethers Application

They are increasingly used in radiation curing systems because of a lower toxicity profile than the commonly used acrylic monomers.

Vinyl ethers application.

It is also important that r is a good radical leaving group. 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. Vinyl ester resins are produced by the reaction esterification between an epoxy resin and an unsaturated monocarboxylic acid. Teator and leibfarth report a general protocol to polymerize a variety of such vinyl ethers isotactically see the perspective by foster and o reilly.

Well optimized catalysts produce vast quantities of isotactic polypropylene in which the side chains all face the same way. Furthermore they are highly attractive monomers for the synthesis of many polymers and copolymers. Add an oxygen into the monomer though and that degree of uniformity becomes harder to enforce. 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.

Essentially they comprise a base of polyester resin strengthened with epoxy molecules in the backbone of the molecular chain. Vinyl ethers 1 x ch 2 a o can be very effective addition fragmentation chain transfer agents. It is the simplest enol ether that is liquid at room temperature. Vinyl ethers undergo homopolymerization via a cationic mechanism.

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 ether hydroxy vinyl ethers prior art date 1950 03 02 legal status the legal status is an assumption and is not a legal conclusion. 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.

Low molecular weight vinyl ethers are versatile monomers for polymerization. Ethyl vinyl ether is an organic compound with the chemical formula ch 3 ch 2 och ch 2. Many different vinyl ethers are commercially available today. Commercial interest has also focused on polymers derived from ethyl isobutyl octadecyl substituents in place of methyl.

From the portfolio of available vinyl ethers the higher boiling and the difunctional vinyl ethers are preferred in coatings applications. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed expired lifetime application number us147333a inventor robert l adelman. Vinyl esters also use peroxides e g. Vinyl ethers undergo radical initiated copolymerization in the presence of specific monomers such as maleates fumarates and acrylics.