Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...
Patent
1984-08-10
1985-11-19
Henderson, Christopher A.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Polymers from only ethylenic monomers or processes of...
526173, 526180, 526181, 526183, 526185, 526189, 526328, 526265, 5263031, C08F 446, C08F 450, C08F 452
Patent
active
045543348
ABSTRACT:
An optically active polymer is obtained by polymerizing a vinyl monomer in the presence of a catalyst which comprises an asymmetric ligand compound of the formula (I) or (II): ##STR1## in which R.sub.1 and R.sub.4 each are --O--R.sub.7, --S--R.sub.7, ##STR2## R.sub.2, R.sub.3, R.sub.5, R.sub.6, R.sub.7 and R.sub.8 each are an alkyl group having 1 to 10 carbon atoms; X is hydrogen, an alkyl group having 1 to 10 carbon atoms or a halogen; and n is a number of 1 to 4; and an anionic initiator to form a complex with said ligand compound.
REFERENCES:
patent: 4107418 (1978-08-01), Yatsu
patent: 4230841 (1980-10-01), Prudence
Okamoto Yoshio
Yuki Heimei
Daicel Chemical Industries Ltd.
Henderson Christopher A.
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