Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...
Patent
1991-04-04
1991-12-10
Schofer, Joseph L.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Polymers from only ethylenic monomers or processes of...
526273, C08F 3402
Patent
active
050719300
ABSTRACT:
Copolymers are produced when 3,4-epoxy-1-butene (EpB) is copolymerized with maleic anhydride. The copolymerization is initiated by free radicals, and comprises both 1,2-propagation and 1,5-propagation of EpB. When an ether is used as the reaction solvent, the product is soluble, and essentially composed of (a) a monomer derived from maleic anhydride, and (b) two monomers derived from EpB. When the reaction solvent is a ketone, the polymer product is also soluble, and additionally contains (c) a moiety derived from a dioxolane formed in situ. When the reaction is conducted in the presence of a non polar (e.g., hydrocarbon or a halocarbon) solvent, or neat (i.e., in the absence of a solvent), the polymer product is insoluble in common organic solvents and contains (d) a symmetrical EpB dimer. This dimer apparently does not form, or is formed to only a very slight extent, when the polymerization is conducted in polar reaction solvents.
Polymer products with a dioxolane moiety can be made by using preformed dioxolane in the polymerization mixture. Thus, this invention is not limited to in situ preparation of the dioxolane from a reaction mixture containing a ketone.
Products of this invention can be cast as clear films and can also be used as reactive polymers.
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Blevins Richard W.
Turner S. Richard
Eastman Kodak Company
Schofer Joseph L.
Walker Alex H.
Walker Robert L.
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