Vinyl Ethers Application

Teator and leibfarth report a general protocol to polymerize a variety of such vinyl ethers isotactically see the perspective by foster and o reilly.

Vinyl ethers application.

Vinyl esters also use peroxides e g. Commercial interest has also focused on polymers derived from ethyl isobutyl octadecyl substituents in place of methyl. Essentially they comprise a base of polyester resin strengthened with epoxy molecules in the backbone of the molecular chain. 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.

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. Certain vinyl ethers obtained through the carbide route can be utilized as monomers in polymerization by cationic and free radical mechanisms. 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.

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. However it is challenging to incorporate these substrates in transition metal catalyzed olefin polymerization due to various side reactions such as cationic. 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.

Ethyl vinyl ether is an organic compound with the chemical formula ch 3 ch 2 och ch 2. It is also important that r is a good radical leaving group. Vinyl ethers undergo homopolymerization via a cationic mechanism. The electron rich nature of vinyl ethers ch2 chor enables their versatile reactivity patterns with transition metal catalysts.

Low molecular weight vinyl ethers are versatile monomers for polymerization. 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. It is used as a synthetic building block and a monomer.

Many different vinyl ethers are commercially available today. Vinyl ethers undergo radical initiated copolymerization in the presence of specific monomers such as maleates fumarates and acrylics. Vinyl ethers 1 x ch 2 a o can be very effective addition fragmentation chain transfer agents. Well optimized catalysts produce vast quantities of isotactic polypropylene in which the side chains all face the same way.