Method to reduce coupling during termination with functional...

Details Method to reduce coupling during termination with functional... Method to reduce coupling during termination with functional...

2005-05-25

2008-12-16

Gulakowski, Randy (Department: 1796)

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

Synthetic resins

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

C525S249000, C525S250000, C525S383000, C525S386000, C525S236000

Reexamination Certificate

active

07465768

ABSTRACT:
A novel method of preparing carboxyl-terminated polymers. A monomer is mixed with an organolithium initiator in a hydrocarbon solvent so as to anionically polymerize linear living polymer lithium chains. A trialkyl aluminum compound is also mixed so as to form polymer lithium: aluminate complexes in equilibrium with the linear living polymer lithium chains. When a cyclic anhydride terminator is mixed, the cyclic anhydride terminator preferentially reacts with the C—Li center on a living polymer lithium chain rather than with the C—Al—Li center on a polymer lithium: aluminate complex.

REFERENCES:
patent: 4835220 (1989-05-01), Bronstert et al.
patent: 5514753 (1996-05-01), Ozawa et al.
patent: 6103846 (2000-08-01), Willis et al.
patent: 6150463 (2000-11-01), Lanza et al.
patent: 6242538 (2001-06-01), Bening et al.
patent: 6391981 (2002-05-01), Willis et al.
patent: 6492469 (2002-12-01), Willis et al.
patent: 7009000 (2006-03-01), Bening et al.

Affiliated with

Also associated with

Rating

Method to reduce coupling during termination with functional... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method to reduce coupling during termination with functional..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method to reduce coupling during termination with functional... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4040235