POLYCARBONATE COMPOSITIONS
First Claim
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1. A polycarbonate composition comprising:
- a. from 20 to 80 weight percent of a first polycarbonate component;
b. from greater than 0 to 25 weight percent of a polysiloxane-polycarbonate block copolymer comprising a polycarbonate block derived from bisphenol A and a diorganopolysiloxane block of the general formula (I);
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Abstract
Disclosed herein are methods and compositions of blended polycarbonate resins with improved flame resistance and impact strength. The resulting compositions can be used in the manufacture of articles while still retaining the advantageous physical properties of blended polycarbonate compositions with improved flame resistance and impact strength. This abstract is intended as a scanning tool for purposes of searching in the particular art and is not intended to be limiting of the present invention.
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Citations
30 Claims
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1. A polycarbonate composition comprising:
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a. from 20 to 80 weight percent of a first polycarbonate component; b. from greater than 0 to 25 weight percent of a polysiloxane-polycarbonate block copolymer comprising a polycarbonate block derived from bisphenol A and a diorganopolysiloxane block of the general formula (I); - View Dependent Claims (4, 5, 6, 7, 8, 29)
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2. The polycarbonate composition of claim Error! Reference source not found., wherein the flame retardant comprises bisphenol A diphenylphosphate.
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3. The polycarbonate composition of claim Error! Reference source not found., wherein the impact modifier comprises a methyl methacrylate-butadiene-styrene (MBS) impact modifier.
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9. A polycarbonate composition comprising:
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a. from 20 to 80 weight percent of a first polycarbonate component; b. from 10 to 25 weight percent of a polysiloxane-polycarbonate block copolymer comprising a polycarbonate block derived from Bisphenol-A and diorganopolysiloxane block of the general formula (I); - View Dependent Claims (10, 11, 12, 13, 14, 30)
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15. A method for the manufacture of a polycarbonate composition that exhibits a notched izod impact strength greater than 400 J/m as measured according to American Society for Testing and Materials (ASTM) D256 as measured on a bar having a thickness of 3.2 mm and wherein the composition exhibits a UL-94 flammability rating of V0 as measured on a flame bar having a thickness of 0.60 mm, wherein the method comprises combining
a. a first polycarbonate component, wherein the first polycarbonate component is combined in an amount of from about 20 to 80 weight percent of the composition; b. a polysiloxane-polycarbonate block copolymer comprising a polycarbonate block derived from bisphenol A and a diorganopolysiloxane block of the general formula (I); - View Dependent Claims (16, 17, 18, 19, 20, 21, 22)
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23. A method for the manufacture of a polycarbonate composition that exhibits a notched izod impact strength greater than 400 J/m as measured according to American Society for Testing and Materials (ASTM) D256 as measured on a bar having a thickness of 3.2 mm and wherein the composition exhibits a UL-94 flammability rating of V0 as measured on a flame bar having a thickness of 0.60 mm, wherein the method comprises combining
a. a first polycarbonate component, wherein the first polycarbonate component is combined in an amount of from about 20 to 80 weight percent of the composition; b. a polysiloxane-polycarbonate block copolymer comprising a polycarbonate block derived from bisphenol A and a diorganopolysiloxane block of the general formula (I); - View Dependent Claims (24, 25, 26, 27, 28)
Specification