Compositions – Preservative agents – Anti-oxidants or chemical change inhibitants
Patent
1976-04-23
1977-07-05
Garvin, Patrick P.
Compositions
Preservative agents
Anti-oxidants or chemical change inhibitants
526173, C08F 448
Patent
active
040339009
ABSTRACT:
This invention relates to the preparation of solution polymers and rubbers from vinyl monomers using a new catalyst complex of a barium di-tert-alkoxide-hydroxide salt and ann organic lithium compound. In particular, homopolymers and copolymers of butadiene with styrene and/or isoprene, prepared with this catalyst, are uniquely characterized by the butadiene units having a low vinyl content (not over about 12%) and a trans-1,4 structure of from about 70 to 81%. Also, the copolymer has a random comonomer sequence distribution. This molecular structure permits elastomers containing little or no styrene to have sufficient stereoregularity to crystallize. Furthermore, the butadiene homopolymer and copolymer with styrene and/or isoprene exhibit a broad molecular weight distribution as well as tack and green-strength which are valuable properties for a rubber to possess when building tires.
REFERENCES:
patent: 3163630 (1964-12-01), Pampus et al.
patent: 3629213 (1971-12-01), Onishi et al.
patent: 3886130 (1975-05-01), Lim et al.
Aggarwal Sundar Lal
Hargis Ivan Glen
Livigni Russell Anthony
Garvin Patrick P.
The General Tire & Rubber Company
LandOfFree
Composition useful in anionic polymerization does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Composition useful in anionic polymerization, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Composition useful in anionic polymerization will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-576444