Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...
252475, 260 63R, 526335, 526340, 526346, 526347, C08F 446, C08F 472, C08F 3606, C08F11208
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 an 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.
patent: 3629213 (1971-12-01), Onishi et al.
patent: 3657209 (1972-04-01), Carlson et al.
patent: 3687916 (1972-08-01), Mueller et al.
patent: 3846385 (1974-11-01), Hargis et al.
patent: 3865749 (1975-02-01), Tornqvist et al.
patent: 3896102 (1975-07-01), Naylor
Aggarwal Sundar Lal
Hargis Ivan Glen
Livigni Russell Anthony
Hamrock William F.
The General Tire & Rubber Company
Preparation of solution polymers does not yet have a rating. At this time, there are no reviews or comments for this patent.If you have personal experience with Preparation of solution polymers, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Preparation of solution polymers will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-275377