Preparation of star polymers

Details Preparation of star polymers Preparation of star polymers

1981-07-13

1983-10-11

Michl, Paul R.

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

Synthetic resins

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

526173, 526335, 526340, 525901, 525 64, 525 92, C08F29704

Patent

active

044093683

ABSTRACT:
Divinyl benzene and/or diisopropenyl benzene in hydrocarbon solvent is added over a period of time at low temperature to a hydrocarbon solvent containing a C.sub.2-20 normal, secondary or tertiary alkyl or cycloalkyl lithium compound and a tertiary alkylamine having 2-4 carbon atoms prepared at low temperature to provide an initiator having an average of from 4 to 9 C-Li sites and a VPO Mn of from about 750 to 4,000. These initiators are useful in polymerizing dienes and vinyl monomers to provide star polymers having an average of from about 4 to 9 arms or branches. These star polymers among other things are useful low profile or low shrink additives of FRPs, e.g., glass fiber reinforced plastics.

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patent: 3652516 (1972-03-01), Farrar
patent: 3734972 (1973-05-01), Naylor
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patent: 3763126 (1973-10-01), Farrar
patent: 3787510 (1974-01-01), Farrar
patent: 3903972 (1975-09-01), Foss
patent: 3985830 (1976-10-01), Fetters
patent: 4116917 (1978-09-01), Eckert

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