Aromatic polycarbonate composition
US6107440A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 23, 1998 |
| Grant date | Aug 22, 2000 |
| Priority date | — |
| Expiry date | Jan 23, 2018 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L55/02
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Disclosed is an aromatic polycarbonate composition which is substantially the same as that produced by a method comprising: (1) subjecting to a transesterification reaction in a polymerizer at least one polymerizable material selected from a molten monomer mixture of an aromatic dihydroxy compound and a diaryl carbonate, and a molten prepolymer obtained by reacting an aromatic dihydroxy compound with a diaryl carbonate, wherein the polymerizable material is present in the form of a liquid mass in the polymerizer, and wherein the reaction of the liquid mass of polymerizable material is performed under conditions such that the following formula is satisfied: log (S/V).gtoreq.2.times.10.sup.-5 .times.Mn+0.8, wherein S represents an evaporation surface area (m.sup.2) defined as the area (m.sup.2) of an exposed surface of the liquid mass of polymerizable material; V represents the volume (m.sup.3) of the liquid mass of polymerizable material in the polymerizer; and Mn represents the Mn of the aromatic polycarbonate to be produced, PA1 thereby obtaining an aromatic polycarbonate (A) in molten form; PA1 (2) adding to (A) in molten form a thermoplastic resin (B) other than an aromatic poly…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.