Polymers with new sequence distributions
AssigneeExxonMobil Chemical Patents Inc.
InventorsDavid Chung, Timothy Shaffer
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Abstract
The invention relates to new polymerization processes including diluents including hydrofluorocarbons and their use to produce novel polymers with new sequence distributions. In particular, the invention relates to copolymers of an isoolefin, preferably isobutylene, and an alkylstyrene, preferably methylstyrene, even more preferably para-methylstyrene, with new sequence distributions. The copolymer may optionally be halogenated.
Claims85
A copolymer comprising an isoolefin and an alkylstyrene, the copolymer having a copolymer sequence distribution defined by:
- F=1−{mA/(1+mA)}
- wherein m is the copolymer sequence distribution parameter;
- A is the molar ratio of alkylstyrene to isoolefin in the copolymer;
- and
- F is the alkylstyrene-isoolefin-alkylstyrene triad fraction in the copolymer;
- wherein m is from less than 38:
A copolymer produced by the process comprising contacting an isoolefin, preferably isobutylene, an alkylstyrene, one or more Lewis acid(s), one or more initiator(s), and a diluent comprising one or more hydrofluorocarbon(s) (HFC's);
- the copolymer having a copolymer sequence distribution defined by:
- F=1−{mA/(1+mA)}
- wherein m is the copolymer sequence distribution parameter;
- A is the molar ratio of alkylstyrene to isoolefin in the copolymer;
- and
- F is the alkylstyrene-isoolefin-alkylstyrene triad fraction in the copolymer;
- wherein m is from less than 38.
A functionalized or halogenated copolymer derived from a copolymer comprising a C4-C7 isoolefin and an alkylstyrene represented by the formula:
- wherein each R1 and R2 are independently selected from the group consisting of hydrogen, an alkyl, a primary haloalkyl, and a secondary haloalkyl;
- the copolymer having a copolymer sequence distribution defined by:
- F=1−{mA/(1+mA)}
- wherein m is the copolymer sequence distribution parameter;
- A is the molar ratio of alkylstyrene to isoolefin in the copolymer;
- and
- F is the alkylstyrene-isoolefin-alkylstyrene triad fraction in the copolymer;
- wherein m is from less than 38.
Dependencies are inferred from the claim text.