Styrenic polymer containing polyisobutylene side-chains
AssigneeUniversity of Ottawa
InventorJean M. J. Frechet
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Abstract
Novel styrene derivatives are disclosed of the formula: ##STR1## wherein R.sub.1 and R.sub.2 are the same or different and each represents a saturated aliphatic hydrocarbon group or an aromatic hydrocarbon group, and R.sub.3 is --OH, Cl, or a group of the formula --OR.sub.4 or ##STR2## wherein R.sub.4 represents a saturated aliphatic hydrocarbon group or a n aromatic hydrocarbon group. The functionalized styrene monomers I as well as polymers and copolymers incorporating such monomer units are useful as initiators, or precursors thereof, for the polymerization of isobutylene under cationic conditions to give graft copolymers containing both styrenic and isobutylenic units. These copolymers have commercial applications such as rubbers, coatings, and lubricants.
Claims10
A styrenic polymer or copolymer which contains, randomly located in the polymer chain, monomer units of the formula:
- ##STR18## wherein R.sub.1 and R.sub.2 each represents a saturated aliphatic hydrocarbon group and R.sub.3 is a polyisobutylene moiety.
A styrenic polymer containing repeating units of the formula:
- ##STR19## wherein R.sub.1 and R.sub.2 each represents a saturated aliphatic hydrocarbon group and R.sub.3 is a polyisobutylene moiety, x and y are the same or different integers form 1 to about 2000 and n is an integer from 1 to about 1000, and wherein the substituted styrenic moieties of formula (III) are randomly located in the polymer chain.
Dependencies are inferred from the claim text.