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    • 2. 发明授权
    • Gradient copolymers, as well as a method for their preparation and their use
    • 梯度共聚物,以及它们的制备方法及其应用
    • US06403745B1
    • 2002-06-11
    • US09450720
    • 1999-11-30
    • Markus SchererJoseph Martin BollingerJoan Souchik
    • Markus SchererJoseph Martin BollingerJoan Souchik
    • C08F11802
    • C10L10/16C08F220/12C10L1/1963
    • This invention concerns gradient copolymers, that are obtainable by polymerizing a mixture of olefinically unsaturated monomers that consist of a) 0 to 40% by weight of one or more ethylenically unsaturated ester compounds of formula (I) where R is hydrogen or methyl, R1 means a linear or branched alkyl residue with 1 to 5 carbon atoms, R2 and R3 independently represent hydrogen or a group of the formula —COOR′, where R′ means hydrogen or an alkyl group with 1 to 5 carbon atoms, b) 10 to 98% by weight of one or more ethylenically unsaturated ester compounds of formula (II) where R is hydrogen or methyl, R4 means a linear or branched alkyl residue with 6 to 15 carbon atoms, R5 and R6 independently are hydrogen or a group of the formula —COOR″, where R″ means hydrogen or an alkyl group with 6 to 15 carbon atoms, c) 0 to 80% by weight of one or more ethylenically unsaturated ester compounds of formula (III) where R is hydrogen or methyl, R7 means a linear or branched alkyl residue with 16 to 30 carbon atoms, R8 and R9 independently are hydrogen or a group of the formula —COOR′″ where R′″ means hydrogen or an alkyl group with 16 to 30 carbon atoms, d) 0 to 50 % by weight comonomer, where the indication of % by weight in each case refers to the total weight of the ethylenically unsaturated monomers, where the mixture of the ethylenically unsaturated monomers is varied during chain growth in order to obtain copolymers that have a gradient. The new copolymers are used as pour point depressants.
    • 本发明涉及通过聚合烯属不饱和单体的混合物获得的梯度共聚物,其由以下组成的组分组成:a)0至40重量%的一种或多种式(I)的烯键式不饱和酯化合物,其中R是氢或甲基,R 1表示 具有1至5个碳原子的直链或支链烷基,R2和R3独立地表示氢或式-COOR'的基团,其中R'表示氢或具有1至5个碳原子的烷基,b)10至98% 的一种或多种式(II)的烯键式不饱和酯化合物,其中R是氢或甲基,R4表示具有6至15个碳原子的直链或支链烷基,R5和R6独立地是氢或式 - COOR“,其中R”表示氢或具有6至15个碳原子的烷基,c)0至80重量%的一种或多种式(III)的烯键式不饱和酯化合物,其中R是氢或甲基,R7 是指具有16至16的直链或支链烷基残基 30个碳原子,R8和R9独立地是氢或式-COOR“'的基团,其中R”表示氢或具有16至30个碳原子的烷基,d)0至50重量%的共聚单体,其中 在每种情况下,重量%的指示是指烯属不饱和单体的总重量,其中烯键式不饱和单体的混合物在链生长期间变化以获得具有梯度的共聚物。新的共聚物用作倾倒 点抑制剂。