Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Patent
1997-05-23
2000-05-09
Mullis, Jeffrey C.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
525217, 525222, 525241, 524515, 524528, C08F25700, C08F25702, C08F25900, C08F25902
Patent
active
060605634
ABSTRACT:
Graft copolymers having cationic units pendant to the backbone chain are disclosed. These polymers are prepared by reacting a polymer containing halogenated paramethylstyrene units in the chain, e.g., a brominated copolymer of isobutylene and para-methylstyrene, with an anionically polymerized polymer made using an organolithium initiator compound having the formula R.sub.1 R.sub.2 Z R.sub.3 --Li where R.sub.1 and R.sub.2 are alkyl radicals, R.sub.3 is a direct link or an organic radical and Z is nitrogen or phosphorous. Reaction of the anionically polymerized polymer having an R.sub.1 R.sub.2 Z R.sub.3 --end group with the halogenated polymer leads to graft polymers coupled by a quaternary ammonium or phosphonium groups.
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Fetters Lewis J.
Peiffer Dennis G.
Rucker Rebecca L.
Sissano Joseph A.
Wang Hsien-Chang
Exxon Research and Engineering Co
Mullis Jeffrey C.
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