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    • 43. 发明授权
    • Copolymers of vinyl dioxolanes and maleimides
    • 乙烯基二氧戊环和马来酰亚胺的共聚物
    • US5338813A
    • 1994-08-16
    • US185081
    • 1994-01-24
    • Richard W. BlevinsS. Richard Turner
    • Richard W. BlevinsS. Richard Turner
    • C08F2/06C08F4/04C08F222/40C08F224/00C08F4/34
    • C08F222/40C08F224/00
    • Copolymers are produced when a 4-vinyl-1,3-dioxolane monomer is copolymerized with an imidized maleic anhydride (for example, maleimide) monomer in the presence of a free radical initiator. Alternatively, a maleamic acid or maleimide functionality may be introduced into a copolymer containing a 4-vinyl-1,3-dioxolane and maleic anhydride by introducing a primary amine into the reaction mixture. Also, the dioxolane reactant may be introduced into the polymer by reacting 3,4-epoxy-1-butene in a ketone reaction solvent. The structure and composition of the product copolymer are controlled by both the sequence and conditions of the reaction. Products of this invention can be cast as clear films and can also be used as reactive polymers.
    • 当4-乙烯基-1,3-二氧戊环单体与酰亚胺化的马来酸酐(例如马来酰亚胺)单体在自由基引发剂存在下共聚时,产生共聚物。 或者,可以通过将伯胺引入反应混合物中,将马来酰胺酸或马来酰亚胺官能团引入到含有4-乙烯基-1,3-二氧戊环和马来酸酐的共聚物中。 此外,二氧戊环反应物可以通过在酮反应溶剂中使3,4-环氧-1-丁烯反应而引入聚合物中。 产物共聚物的结构和组成由反应的顺序和条件两者来控制。 本发明的产品可以作为透明膜浇铸,也可以用作反应性聚合物。
    • 48. 发明授权
    • Butadiene monoepoxide/maleic anhydride copolymers
    • US5071930A
    • 1991-12-10
    • US680455
    • 1991-04-04
    • Richard W. BlevinsS. Richard Turner
    • Richard W. BlevinsS. Richard Turner
    • C08F222/06
    • C08F222/06
    • 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.