Polycarbonate branched with double-ring aromatic compound
AssigneeEnichem Tecnoresine S.p.A.
InventorsPiero Manaresi, Francesco Pilati, Corrado Berti, Alberto Petri
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Abstract
In the present invention disclosed are high-molecular-weight, soluble, thermoplastic branched polycarbonates endowed with improved properties, and suitable to blow-moulding fabrication. Such polycarbonates are characterized by the presence, in their structure, of units deriving from the following double-ring aromatic compounds: ##STR1## wherein R.sub.1 indicates H, --COCL, --SO.sub.2 Cl; R.sub.2, R.sub.3 and R.sub.4, equal to or different from each other, indicate --COCl or SO.sub.2 Cl. The above-said compounds are directly used in the syntheses.
Claims2
A branched polycarbonate produced from at least one aromatic dihydroxy compound, a carbonate precursor and a branching agent having the following formula:
- ##STR4## wherein R.sub.1 is H and R.sub.2 -R.sub.4 are --SO.sub.2 Cl.
Dependencies are inferred from the claim text.