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    • 8. 发明授权
    • Copolymers based on maleic anhydride and .alpha., .beta.-unsaturated
compounds a process for their preparation and their use as paraffin
inhibitors
    • 基于马来酸酐和α,β-不饱和化合物的共聚物,其制备方法及其作为石蜡抑制剂的用途
    • US4670516A
    • 1987-06-02
    • US700411
    • 1985-02-11
    • Gunter SackmannJan MazanekWolfgang OberkirchHerbert Bartl
    • Gunter SackmannJan MazanekWolfgang OberkirchHerbert Bartl
    • C08F8/32C08F8/44C10L1/196C10L1/236
    • C10L1/1966C08F8/32C08F8/44C10L1/2364
    • The new copolymers based on maleic anhydride and .alpha.,.beta.-unsaturated compounds contain, as bivalent structural units,A: 20 to 95 mole % of the structural element ##STR1## B: 0 to 40 mole % of the structural element ##STR2## C: and 0 to 40 mole % of the structural element ##STR3## the sum of the mole percents of (A), (B) and (C) being 100, and wherein R.sup.1 and R.sup.2 are identical or different and denote hydrogen, alkyl, optionally substituted aryl or the ester group ##STR4## in which R.sup.4 represents alkyl with 1 to 20 carbon atoms,R.sup.3 denotes an alkyl, cycloalkyl or optionally substituted aryl radical with 1 to 20 carbon atoms andX and Y are identical or different and represent the group--O--R.sup.5in whichR.sup.5 denotes hydrogen, a cation or alkyl with 1 to 40 carbon atoms, orX and Y represent the group--NHR.sup.3in which R.sup.3 has the abovementioned meaning,at least one of the radicals X and Y representing the group --O--R.sup.5, and at least one of the radicals in the radicals X and Y containing at least 18 carbon atoms.The new copolymers can be prepared by reacting alternating copolymers of maleic anhydride and .alpha.,.beta.-unsaturated compounds with monoalcohols and monoamines. They can be used as paraffin inhibitors.
    • 基于马来酸酐和α,β-不饱和化合物的新共聚物含有作为二价结构单元的A:20至95摩尔%的结构元素B:0至40摩尔%的结构元素 :(A),(B)和(C)的摩尔百分数的总和为100,其中R 1和R 2相同或不同,表示氢,烷基, 任选取代的芳基或其中R 4表示具有1至20个碳原子的烷基的酯基“IMAGE”,R 3表示具有1至20个碳原子的烷基,环烷基或任选取代的芳基,X和Y相同或不同, 基团-O-R5,其中R5表示氢,阳离子或具有1至40个碳原子的烷基,或X和Y表示其中R3具有上述含义的基团-NHR 3,基团X和Y中的至少一个表示 基团-O-R5,并且基团X和Y中的至少一个基团含有至少1个 8个碳原子。 新的共聚物可以通过使马来酸酐和α,β-不饱和化合物的交替共聚物与一元醇和单胺反应来制备。 它们可以用作石蜡抑制剂。