| 摘要 |
<p>Copolymers of unsaturated ethers of formula R-CH=CH-OR1 where R is hydrogen or an alkyl, aryl, alicyclic or aralkyl group, optionally substituted, having 1 to 16 carbon atoms and R1 is an alkyl, aryl, alicyclic or aralkyl group, optionally substituted, having 1 to 16 carbon atoms, with unsaturated halogenated ethers of formula Ha-CH=CH-OR11 where Ha is halogen and R11 is an alkyl, aryl, alicyclic or aralkyl group, optionally substituted, having 1-16 carbon atoms may be prepared by copolymerizing the monomers at +100 DEG to -120 DEG C. in the presence of a catalyst comprising a boron halide or complex thereof, a halide of an organometallic compound of metals of Group II or III of the Periodic Table, or a halogeno-alcoholate or other mixed salt containing the residues of more than one acid of transition metals of Group IV. Specified catalysts are boron trifluoride etherate, ethyl aluminium dichloride, diethyl aluminium chloride, dichlorotitanium dibutylate and dichlorotitanium diacetate. Copolymerization may be effected in an inert solvent, e.g. toluene, heptane, ethyl acetate and diethyl ether, and the products recovered by pouring the reaction mixture into methanol. The ethers may be either cis or trans forms or mixtures thereof, and many suitable ethers are listed, and examples describe the copolymerization of (1 to 4) vinyl isobutyl ether and b -chlorovinyl isobutyl ether; (5 to 8) vinyl butyl ether and cis b -chlorovinyl butyl ether; vinyl isobutyl ether with (9) trans and (10) cis b -chlorovinyl isobutyl ether; (11) cis methyl isobutoxy ethylene and trans b -chlorovinyl isobutyl ether; trans methyl isobutoxy ethylene and (12) trans and (13) cis b -chlorovinyl isobutyl ether; (14) cis methyl isobutoxy ethylene and cis b -chlorovinyl isobutyl ether; (15) vinyl butyl ether and cis b -chlorovinyl butyl ether; (16 to 22) vinyl isobutyl ether and cis b -chlorovinyl isobutyl ether. The products may be vulcanized.</p> |
