Monomers, vinyl ether-urethanes

Products Pigments/dispersions, photoinitiators/sensitizers, acrylate monomers, vinyl ethers, polyols/glycols, epoxy acrylates, polyester acrylates, unsaturated polyesters, urethane acrylates... 

Synonyms HBVE hexamethylene diurethane Classification Vinyl ether terminated aliphatic urethane monomer Empirical CjoHjsNjOe Properties Solid m.w. 400.51... 

Classification Vinyl ether terminated aliphatic urethane monomer Empirical C20H36N2O6... 

Eventually, bis(2-hydroxyethyl)isosorbide may be chemically modified to form, bisacrylate esters or bis vinyl ethers, which can be used in photochemical or thermal cured vinyl resin compositions. Alternatively, this compound may be reacted with epichlorohy-drin and bases to form bis(glycidyl ether) adducts which may be used in epoxy resins. Bis(2-hydroxyethyl)isosorbide will find use as a monomer in many polymeric compositions, such as polyesters, poly(urethane)s, poly(ether sulfone)s. 

The resulting N-radicals, which are all attached to substrate chains, initiate free-radical graft polymerization of suitable vinyl monomers. The method has been applied to synthesize hydrophilic grafts on poly(ether-urethanes)... 

These esters may be grafted to poly(ether-urethanes) either as homopolymers or copolymers by the procedure already outlined. In addition, they may be copolymerized directly with other vinyl monomers to give materials with a wide variety of properties. 

As explained earlier, the segmented structure of poly(ether-urethanes) leads to high swelling and partial solution when the polymers are immersed in liquids of widely varying polarity. Table 1 lists the effects of a number of liquids on non-halogenated Biomer including some hydrophilic vinyl monomers. Note that all results were obtained with artificial arterial... 

Some results for photo-initiated grafting of monomers to brominated poly(ether-urethanes) are given in Table 4. It is clear that grafting with polar vinyl monomers produces far greater weight increases when the reactions are effected homogeneously in DMF solution. 

The cyclic diether, 1,3-dioxolane, is recommended by Ferro Corporation as a more benign solvent substitute for chlorinated organic solvents, such as methylene chloride, 1,2-dichloroethane, and 1,1,1-trichloroethane, and for ketones, such as methyl ethyl ketone (MEK). This ethylene glycol-based ether is a suitable solvent under neutral and basic conditions in several major-use areas. It is a powerful solvent for softening and dissolving polymers made from polar monomers, for example, polycarbonates, acrylates, cellulosics urethanes, phenoUcs, nitriles, urea-formaldehydes, and alkyds, as well as polyesters, vinyl epoxys, and halogen-containing polymers. As a reaction solvent it is added as a component to a special quaternary ammonium or phosphonium salt solution for preparation of a vesicular phenoxy resin. Other beneficial uses for the solvent dioxolane, include ... 

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