Adducts of mid-range vinylidene content polyisobutylene...

Details Adducts of mid-range vinylidene content polyisobutylene... Adducts of mid-range vinylidene content polyisobutylene...

2006-08-15

2006-08-15

Teskin, Fred (Department: 1713)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

C525S149000, C525S285000, C525S379000, C525S911000, C549S233000, C549S234000, C549S512000, C549S513000, C548S520000, C548S545000, C564S511000, C568S716000

Reexamination Certificate

active

07091285

ABSTRACT:
A reaction product comprising an adduct of a mid-range vinylidene content PIB polymer composition and maleic anhydride, a phenolic compound or a compound having a reactive site for subsequent amination. The PIB composition comprises a relatively low molecular weight, mid-range vinylidene content PIB polymer product wherein at least about 90% of the PIB molecules present in the product comprise alpha or beta position isomers. The vinylidene (alpha) isomer content of the product may range from 20% to 70% thereof and the content of tetra-substituted internal double bonds is very low, preferably less than about 5% and ideally less than about 1–2%. The mid-range vinylidene content PIB polymer products may be prepared employing a liquid phase polymerization process conducted in a loop reactor at a temperature of at least 60° F. using a BF3/methanol catalyst complex and a contact time of no more than 4 minutes.

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