Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From halogenated hydrocarbon reactant
Patent
1997-12-19
1999-10-05
Truong, Duc
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From halogenated hydrocarbon reactant
528401, 521 82, 478421, 478690, 478917, 4274071, 313483, C08G 6100
Patent
active
059626313
ABSTRACT:
The invention relates to 2,7-substituted-9-substituted fluorenes and 9-substituted fluorene oligomers and polymers. The fluorenes, oligomers and polymers are substituted at the 9-position with two hydrocarbyl moieties which may optionally contain one or more of sulfur, nitrogen, oxygen, phosphorous or silicon heteroatoms; a C.sub.5-20 ring structure formed with the 9-carbon on the fluorene ring or a C.sub.4-20 ring structure formed with the 9-carbon containing one or more heteroatoms of sulfur, nitrogen or oxygen; or a hydrocarbylidene moiety. In one embodiment, the fluorenes are substituted at the 2- and 7-positions with aryl moieties which may further be substituted with moieties which are capable of crosslinking or chain extension or a trialkylsiloxy moiety. The fluorene polymers and oligomers may be substituted at the 2- and 7'-positions. The monomer units of the fluorene oligomers and polymers are bound to one another at the 2- and 7'-positions. The 2,7'-aryl-9-substituted fluorene oligomers and polymers may be further reacted with one another to form higher molecular weight polymers by causing the optional moieties on the terminal 2,7'-aryl moieties, which are capable of crosslinking or chain extension, to undergo chain extension or crosslinking. Also disclosed are processes for preparing the disclosed compounds.
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Inbasekaran Michael
Roof Gordon R.
Shiang William R.
Woo Edmund P.
Galbraith Ann K.
The Dow Chemical Company
Truong Duc
LandOfFree
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