| US 7,605,221 B2 | ||
| Weatherable, thermostable polymers having improved flow composition | ||
| Gary C. Davis, Albany, N.Y. (US); Brian D. Mullen, Mt. Vernon, Ind. (US); and Paul D. Sybert, Evansville, Ind. (US) | ||
| Assigned to SABIC Innovative Plastics IP B.V., Bergen op Zoom (Netherlands) | ||
| Filed on Jun. 27, 2006, as Appl. No. 11/426,680. | ||
| Application 11/426680 is a continuation in part of application No. 11/025635, filed on Dec. 29, 2004, granted, now 7,169,859. | ||
| Application 11/025635 is a continuation in part of application No. 10/307873, filed on Dec. 02, 2002, granted, now 6,861,482, filed on Mar. 01, 2005. | ||
| Application 10/307873 is a continuation in part of application No. 09/908396, filed on Jul. 18, 2001, granted, now 6,610,409, filed on Aug. 26, 2003. | ||
| Application 09/908396 is a continuation in part of application No. 09/368706, filed on Aug. 05, 1999, granted, now 6,306,507, filed on Oct. 23, 2001. | ||
| Claims priority of provisional application 60/134692, filed on May 18, 1999. | ||
| Prior Publication US 2007/0027271 A1, Feb. 01, 2007 | ||
| Int. Cl. C08G 77/14 (2006.01) | ||
| U.S. Cl. 528—26 [525/439; 525/446] | 19 Claims |
| 1. A copolymer composition comprising:
a polysiloxane block comprising siloxane units, wherein
the polysiloxane block is of the formula:
 wherein x is 4 to 50, each R3 is the same or different, and is C1-8 alkyl or C6-13 aryl; and D1 is the reaction residue of a dihydroxy aromatic compound; or
the polysiloxane block is of the formula:
 wherein q is 4 to 50; each R3 is the same or different, and R4 is a C6-30 hydrocarbylene; and
a polyarylate-polycarbonate block consisting essentially of arylate polyester units and aromatic carbonate units present in
an amount of
50 to 99 mole percent of arylate polyester units, and
1 to 50 mole percent aromatic carbonate units, wherein
1 to 30 mole percent of the aromatic carbonate units are resorcinol carbonate units, and
0 to 35 mole percent of the aromatic carbonate units are bisphenol carbonate units,
wherein the sum of the mole percentages of arylate polyester units and aromatic carbonate units in the arylate block is 100
mole percent,
wherein the polysiloxane blocks are connected to an arylate ester unit, a aromatic carbonate unit, or both an arylate ester
unit and a aromatic carbonate unit, and
wherein the siloxane units of the polysiloxane block are present in an amount of 0.2 to 10 wt % based on the weight of the
copolymer composition, and
wherein a molded article having a thickness of 3.2±0.12 millimeters, and consisting of the copolymer composition, has a percent
transmittance of greater than or equal to 70%, according to ASTM D1003-00.
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