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    • 8. 发明授权
    • Copolymer blends and their use as additives for improving the cold flow properties of middle distillates
    • 共聚物共混物及其用作改善中间馏分冷流特性的添加剂
    • US06593426B2
    • 2003-07-15
    • US09808481
    • 2001-03-14
    • Matthias KrullThomas VolkmerWerner Reimann
    • Matthias KrullThomas VolkmerWerner Reimann
    • C08L118
    • C10L1/195C10L1/146C10L1/1963C10L1/1966C10L1/1973C10L1/2364
    • The invention relates to additives for improving the cold flow properties of middle distillates, containing from 10 to 95% by weight of copolymers A), from 5 to 90% by weight of copolymers B) and, if required, from 0 to 70% by weight of copolymers C), which correspond to the following formulae: A) copolymers of lower olefins and vinyl esters, B) copolymers comprising B1) from 40 to 60 mol % of bivalent structural units of the formula  where X is O or N—R4 and in which a and b are 0 or 1 and a +b=1, and B2) from 60 to 40 mol % of bivalent structural units of the formula —H2C—CR11R5—  B2 and, if required, B3) from 0 to 20 mol % of bivalent structural units which are derived from polyolefins, the polyolefins being derivable from monoolefins having 3 to 5 carbon atoms, and in which a) R4 is an alkyl or alkenyl radical having 10 to 40 carbon atoms or an alkoxyalkyl radical having 1 to 100 alkoxy units and 1 to 30 carbon atoms in the alkyl radical, and b) R5 is a radical of the formula OCOR12 or COOR12, in which R12 is C1-to C3-alkyl, and c) the number of carbon atoms of the polyolefin molecules on which the structural units B3) are based is from 35 to 350, and d) R11 is hydrogen or methyl, and, if required, C) a further copolymer differing from A) and B) and comprising ethylene and one or more vinyl esters or acrylates, which by itself is effective as a cold flow improver for middle distillates.
    • 本发明涉及用于改善中间馏分的冷流动性的添加剂,其含有10至95重量%的共聚物A),5至90重量%的共聚物B),如果需要,0至70重量% 共聚物C)的重量,其对应于下式:A)低级烯烃和乙烯基酯的共聚物,B)包含B1至40摩尔%的下式的二价结构单元的共聚物,其中X为O或N-R 4, 其中a和b分别为0或1,a + b = 1,B 2)为60至40摩尔%的二价结构单元,如果需要,B3)0至20摩尔%的二价结构单元衍生 聚烯烃可以衍生自具有3至5个碳原子的单烯烃,并且其中a)R4是具有10至40个碳原子的烷基或烯基或具有1至100个烷氧基单元和1至30个碳原子的烷氧基烷基 在烷基中,和b)R 5是式OCOR 12或COOR 12的基团,其中R 1 2是C1-C3烷基,c)结构单元B3)所基于的聚烯烃分子的碳原子数为35〜350,d)R 11为氢或甲基,如果需要, C)与A)和B)不同的另外的共聚物,并且包含乙烯和一种或多种乙烯基酯或丙烯酸酯,其本身作为中间馏分的冷流改进剂是有效的。