Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...
Patent
1992-12-16
1994-07-05
Teskin, Fred
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Polymers from only ethylenic monomers or processes of...
526185, 526189, 526336, 526340, 525249, 5253322, C08F 454, C08F 3606
Patent
active
053268385
ABSTRACT:
A method of preparing homopolymers of conjugate dienes and copolymers of conjugate dienes with other dienes or with vinyl aromatic compounds, by means of which the aforementioned monomers are polymerised by using a complex catalytic composition basically comprising (a) an organomagnesium compound, (b) an organoaluminium compound and (c) an organic compound of phosphorus P(V) or P(III), of the metals barium, strontium or calcium. The method according to the invention is for producing homopolymers of 1,3-butadiene and copolymers of butadiene and styrene in random manner, with a high 1,4-trans addition content (above 70%) and vinyl addition below 5%. The method is also used to prepare block copolymers of the aforementioned monomers.
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Madueno Casado M. A.
Mendez Perez A.
Michiels Vega W.
Parellada Ferrer M. D.
Ruiz Santa Quiteria V.
Repsol Quimica S.A.
Teskin Fred
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