Ring opening polymerization of 3,4-dimethylene cyclobutene and d

Details Ring opening polymerization of 3,4-dimethylene cyclobutene and d Ring opening polymerization of 3,4-dimethylene cyclobutene and d

1985-10-07

1987-02-24

Michl, Paul R.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526259, 526268, 526280, 526308, C08F 2806

Patent

active

046458140

ABSTRACT:
Highly conjugated, soluble polymers are prepared by ring opening polymerization of cyclobutenes of the formula: ##STR1## where R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are individually selected from H, alkyl of 1 to 4 carbon atoms, alkoxy of 1 to 4 carbon atoms, phenyl or R.sub.3 and R.sub.4 are combined into a divalent CR.sup.5, O, N=R or S group where R.sup.5 is H, alkyl of 1 to 4 carbon atoms or alkoxy of 1 to 4 carbon atoms with a mild ring opening olefin metathesis catalyst such as a metal carbene. Random copolymers or block copolymers may also be prepared with comonomers capable of olefin metathesis polymerization such as norbornene or cyclopentene.

REFERENCES:
patent: 3383371 (1968-05-01), Natta
patent: 3567699 (1971-03-01), Natta

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