THERMOPLASTIC BLENDS WITH HIGH BONDING STRENGTH

1 . A thermoplastic blend comprising

a. a polycarbonate;

b. an inorganic filler;

c. an impact modifier; and

d. a heat stabilizer; and

wherein a molded specimen of the thermoplastic blend exhibits a bonding strength of greater than about 25 MPa as measured according to ISO 19095;

wherein a 3.2 mm molded specimen of the thermoplastic blend has a notched Izod impact strength of greater than about 150 J/m as measured according to ASTM D256 at 23° C.; and

wherein the thermoplastic blend has a melt volume flow rate of greater than about 18 cubic centimeters per 10 minutes as measured according to ASTM D256 at 280° C. under a 5 kilogram load.

2 . The thermoplastic blend of claim 1 , wherein polycarbonate comprises a sebacic acid polycarbonate, a bisphenol-A polycarbonate, and a para-cumyl phenol polyestercarbonate.

3 . The thermoplastic blend of claim 1 , wherein polycarbonate comprises a bisphenol A homopolycarbonate having a molecular weight range from about 15,000 to about 30,000 Dalton as determined by gel permeation chromatography using bisphenol A polycarbonate standards.

4 . The thermoplastic blend of claim 1 , comprising from about 30 wt % to about 80 wt % of the polycarbonate, provided that the combined wt % of all components does not exceed 100 wt %.

5 . The thermoplastic blend of claim 1 , wherein the inorganic filler comprises flat glass.

6 . The thermoplastic blend of claim 1 , comprising from about 1 wt % to about 60 wt % of the inorganic filler, provided that the combined wt % of all components does not exceed 100 wt %.

7 . The thermoplastic blend of claim 1 , comprising from about 30 wt % to about 50 wt % of the inorganic filler, provided that the combined wt % of all components does not exceed 100 wt %.

8 . The thermoplastic blend of claim 1 , comprising from about 1 wt % to about 10 wt % of the impact modifier, provided that the combined wt % of all components does not exceed 100 wt %.

9 . The thermoplastic blend of claim 1 , comprising from about 5 wt % to about 7 wt % of the impact modifier, provided that the combined wt % of all components does not exceed 100 wt %.

10 . The thermoplastic blend of claim 1 , wherein the impact modifier comprises an ethylene-acrylic ester-glycidyl methacrylate terpolymer; a butylene phthalate/poly(alkylene ether) phthalate copolymer; an acrylic acid ethyl ester-ethylene copolymer; an acrylic polymer, or a combination thereof.

11 . The thermoplastic blend of claim 1 , wherein the impact modifier comprises a butylene phthalate/poly(alkylene ether) phthalate copolymer.

12 . The thermoplastic blend of claim 1 , comprising from about 0.01 wt % to about 3 wt % of the heat stabilizer, provided that the combined wt % of all components does not exceed 100 wt %.

13 . The thermoplastic blend of claim 1 , comprising about 0.06 wt % of the heat stabilizer, provided that the combined wt % of all components does not exceed 100 wt %.

14 . The thermoplastic blend of claim 1 , wherein the heat stabilizer comprises tris(2,4-ditert-butylphenyl) phosphite.

15 . The thermoplastic blend of claim 1 , further comprising a mold release agent.

16 . The thermoplastic blend of claim 15 , comprising from 0.01 wt % to about 5 wt % of the mold release agent, provided that the combined wt % of all components does not exceed 100 wt %.

17 . The thermoplastic blend of claim 15 , wherein the mold release agent comprises pentaerythritol tetrastearate.

18 . The thermoplastic blend of claim 1 , further comprising a reactive additive.

19 . The thermoplastic blend of claim 18 , wherein the reactive additive comprises styrene-acrylate-epoxy oligomer.

20 . The thermoplastic blend of claim 1 , wherein thermoplastic blend has a tensile strength of greater than about 110 MPa as measured in accordance with ASTM D638.