Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...
Patent
1992-08-17
1993-03-16
Teskin, Fred
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Polymers from only ethylenic monomers or processes of...
526173, 526337, 526340, 525250, 525314, C08F 606
Patent
active
051945304
ABSTRACT:
This is an improvement upon a process which comprises anionically polymerizing monomers with an anionic polymerization initiator in a suitable solvent thereby creating a living polymer. The improvement comprises terminating the polymerization by the addition of a terminating agent selected from the group consisting of hydrocarbons containing a C-H group where the carbon is connected directly to a triply-bound carbon, hydrocarbons containing a C-H group where the carbon is connected directly to two doubly-bound carbons and hydrocarbons containing a C-H group where the carbon is connected directly to at least 2 aromatic rings, whereing none of said hydrocarbons contain additional aliphatic unsaturation.
REFERENCES:
patent: 4284741 (1981-08-01), Uraneck et al.
patent: 4737554 (1988-04-01), Roggero et al.
Brownscombe Thomas F.
Chamberlain Linda R.
Gibler Carma J.
Stevens Craig A.
Haas Donald F.
Shell Oil Company
Teskin Fred
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