| 摘要 |
1285208 Alkyl vinyl ether/maleic anhydride/ octadiene copolymer. IMPERIAL CHEMICAL INDUSTRIES Ltd 15 Oct 1970 [29 Oct 1969] 52968/69 Heading C3P. A cross-linked lower alkyl vinyl ether/maleic anhydride/octadiene-1,7 copolymer containing up to 7.5% by weight of octadiene-1,7 and in which each of the two unsaturated groups in part at least of the octadiene-1,7 is incorporated in a different main polymer may be prepared by polymerizing together the ether, anhydride and octadiene, the octadiene being used in an amount of 5 to 25 parts by weight per 100 parts by weight of anhydride. In the examples methyl vinyl ether, maleic anhydride and octadiene-1,7 are copolymerized in the presence of lauroyl peroxide and toluene. The copolymers may be hydrolysed with water and neutralized with sodium hydroxide. |
