Polymers of conjugated dienes which have terminal conjugated uns

Details Polymers of conjugated dienes which have terminal conjugated uns Polymers of conjugated dienes which have terminal conjugated uns

1980-09-12

1981-08-18

Hamrock, William F.

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

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

525242, 525291, 525292, 526173, 526182, 526 82, C08F 448, C08C 1932, C08C 1940

Patent

active

042847419

ABSTRACT:
Alicyclic organomonolithium compounds having delocalized conjugated unsaturation are effective initiators in the preparation of polymers of conjugated dienes. Polymers of conjugated dienes, prepared with or without the alicyclic organomonolithium compounds, are terminated with alicyclic compounds having conjugated unsaturation. Either or both approaches can be used to provide polymers containing alicyclic conjugated unsaturated functional groups. Alternatively, polymers prepared from the alicyclic organomonolithium compounds can be coupled to produce linear or branched polymers. Polymers prepared from multichelic lithium compounds also can be terminated with alicyclic conjugated unsaturated compounds.

REFERENCES:
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patent: 3560593 (1971-02-01), Hsieh
patent: 3734972 (1973-05-01), Noylor et al.
patent: 3884889 (1975-05-01), Hsieh
Nieuwstad et al., Rec. Trav. Chim. 95; 225 (1976), Jour. of Royal Netherlands Chem. Soc.
Fuvukawa et al., Ionic Polymerzation; Yosuda et al., Dekker Inc., 1976, "Dienes Bearing Allylic Protons".
Jour. Pol. Sci., Part B, (Polymer Letters), 10, 17-22, (1972).

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