Transparent polycarbonate PET blends
US5376736A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 12, 1994 |
| Grant date | Dec 27, 1994 |
| Priority date | — |
| Expiry date | Apr 12, 2014 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L69/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Thermoplastic molding compositions are disclosed containing (i) about 1 to 89% polyethylene terephthalate (ii) about 10 to 89% of a first aromatic polycarbonate (PC1) and (iii) about 1-89% of the second aromatic polycarbonate (PC2). PC2 is a copolycarbonate which contains about 5 to 70 mole percent of structural units derived from a dihydroxy compound the bridging unit of which corresponds to ##STR1## wherein R.sup.3 and R.sup.4 X and m are defined. A composition of the invention is characterized in a TLT value which is an improvement over that of the corresponding composition which contains the same amount of PET and only PC1. An additional embodiment of the invention concerns a method for increasing the TLT of a thermoplastic molding composition containing PET and PC1. The method comprises replacing some of said PC1 by PC2.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.