Nicolas E Sunderland

US Patent:

20090326129, Dec 31, 2009

Filed:

Jun 30, 2008

Appl. No.:

12/215789

Inventors:

Marina Rogunova - Pittsburgh PA, US
Nicolas Sunderland - Venetia PA, US
Gerald A. DiBattista - McDonald PA, US

International Classification:

C08L 69/00

US Classification:

524419

Abstract:

A flame-retardant, optically clear thermoplastic molding composition is disclosed. The composition contains aromatic polycarbonate resin, a bromine-substituted carbonate oligomer, a phosphorous containing compound and an inorganic salt of perfluoroalkane sulfonic acid in amounts effective to impart to the composition flame resistance that in accordance with UL-94-5V standard is rated A at 3.00 mm and V-0 at 1.5 mm.

US Patent:

20110071241, Mar 24, 2011

Filed:

Sep 23, 2009

Appl. No.:

12/565167

Inventors:

Marina Rogunova - Pittsburgh PA, US
Nicolas Sunderland - Venetia PA, US
James P. Mason - Carnegie PA, US
Hans Franssen - Krefeld, DE
Berit Krauter - Neuss, DE

Assignee:

Bayer MaterialScience LLC - Pittsburgh PA

International Classification:

C08K 5/42
C08K 5/521

US Classification:

524127, 524165

Abstract:

The present invention relates to a flame-retardant, optically clear thermoplastic molding composition. The composition contains a A) about 60 pbw to about 97 pbw of a polycarbonate, B) about 1 pbw to about 20 pbw of bromine-substituted oligocarbonate, C) about 1 pbw to about 20 pbw of a phosphorus-containing compound and D) about 0.01 pbw to about 1 pbw of at least one alkali or alkaline-earth salt of perfluoroalkane sulfonic acid and optionally E) about 0.01 to about 1 pbw of a phosphite antioxidant/stabilizer. In accordance with UL-94 standard the flame-retardant, optically clear thermoplastic molding composition is rated 5VA at 3.00 mm and V-0 at 2.3 mm, more preferably V-0 at 1.5 mm according to UL-94.