Branched polycarbonate resin and process for production thereof
AssigneeIdemitsu Losan Co., Ltd.
InventorYasuhiro Ishikawa
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Abstract
A branched polycarbonate resin prepared from a divalent phenol, a carbonate precursor, a branching agent, and a chain terminating agent is provided, in which the branching agent is composed of a trisphenol compound represented by the general formula (I). The use of the branching agent brings about excellent washability and permits molding which barely suffers from sagging (blow down) of the melt or stringiness thereof and is accompanied with high melt tension and excellent moldability, thus enabling efficient production of good molded products at high productivity.
Claims6
A branched polycarbonate resin which is obtained by reacting a divalent phenol, a carbonate precursor, a branching agent and a chain terminating agent, wherein said branching agent comprises a trisphenol compound represented by general formula (I):
- wherein each R is represented by general formula (II);
- R′ represents a hydrogen atom or an alkyl group having 1 to 10 carbon atoms;
- R″ represents an alkylene group having 2 to 12 carbon atoms and n represents an integer of 1 to 100.
A process for producing a branched polycarbonate comprising performing interfacial polycondensation of a divalent phenol and phosgene, characterized in that the process comprises using as a branching agent a trisphenol compound represented by the following general formula (I):
- wherein each R is represented by general formula (II);
- R′ represents a hydrogen atom or an alkyl group having 1 to 10 carbon atoms;
- R″ represents an alkylene group having 2 to 12 carbon atoms and n represents an integer of 1to 100.
Dependencies are inferred from the claim text.