Tetra (lower alkaryl) p-phenylene diphosphate-polycarbonate blen

Details Tetra (lower alkaryl) p-phenylene diphosphate-polycarbonate blen Tetra (lower alkaryl) p-phenylene diphosphate-polycarbonate blen

1990-04-23

1992-06-16

Hoke, Veronica P.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Processes of preparing a desired or intentional composition...

524611, C08K 5523

Patent

active

051225565

ABSTRACT:
A polycarbonate-di(alkaryl) p-phenylene diphosphate plasticizer matrix has a tensile strength and elastic modulus higher than neat polycarbonate. By blending an impact modifier with the matrix, resin blends having a wide variety of impact and tensile properties are prepared. The matrix can be used for thin wall instrument housings which can be injection molded to close tolerance. The di(alkaryl) p-phenylene diphosphate has the formula ##STR1## wherein each Ak.sup.1 is independently hydrogen or a methyl radical and each Ak.sup.2 is independently a monovalent hydrocarbon radical having from one to four carbon atoms.

REFERENCES:
patent: 2520090 (1950-08-01), Barrett
patent: 3639506 (1972-02-01), Haat
patent: 4078016 (1978-03-01), Kramer
patent: 4463130 (1984-07-01), Serini et al.
patent: 4766165 (1988-08-01), Kress
Robert W. Stackman "Phosphorus Based Additives . . . Esters" Ind. Evp. Chem. Prod. Res. Dev. vol. 21, No. 2, 1982 pp. 332-336.

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