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US 4,731,484 AGranted
Haloacetyl derivatives of aromatic compounds
AssigneeThe Dow Chemical Company
InventorMarlin E. Walters
Life of this patent
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Abstract
New compounds which are 4,4'-bis(trihaloacetyl) derivatives of aromatic compounds have been prepared by reacting an aromatic compound with a haloacetyl halide in the presence of a Friedel-Crafts catalyst, e.g. AlCl.sub.3, in a suitable solvent. The compounds are useful in preparing polycarbonates, polyesters, polyamides, polyketones and polyurethanes.
Claims20
A compound having the formula:
- ##STR8## wherein B.sub.1 and B.sub.2 are independently selected from ##STR9## and which may be the same or different and wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are independently selected from the group consisting of hydrogen, chlorine, bromine, an alkyl or an alkoxy group having from 1 to 4 carbon atoms, a phenyl group or ##STR10## wherein R.sub.1 and R.sub.2 have the aforesaid meaning, X is chlorine or bromine and A is a single valence bond, oxygen, sulfur, ##STR11## an aromatic group having the formula ##STR12## X, R.sub.1, R.sub.2, R.sub.3 and R.sub.4 having the aforesaid meanings and wherein n is an integer from 1 to 6.
Dependencies are inferred from the claim text.