| 摘要 |
Atactic copolymers derived from an alpha-olefin, optionally ethylene and a non-conjugated diene are provided. The units derived from the diene provide pendant groups having internal or terminal double bonds. Suitable dienes for preparing such copolymers include: CH2=C(R<1>)-R<2>-C(R<3>)=CH2, CH2=C(R<1>)-R<4>-C(R<3>)=CH-CH3, wherein R<1> and R<3> are indenpendently selected from hydrogen or an alkyl group, R<2> and R<4> are alkylene moieties having a chain length of at least 3 carbon atoms and at least 1 carbon atom respectively, or a diene having a cyclic ring with one strained ring double bond and a substituent on the ring of the Formulae: =CR<5>R<6>, -CR<7>=CH2, wherein R<5> and R<6> and R<7> are independently selected from hydrogen or a C1-C3 alkyl. Also provided are processes for the functionalisation of the atactic copolymers and their use as lubricating oil additives. |
