	US 7,491,751 B2
	Method for processing polyester wastes
Viktor Bulgakov, Puschino (Russian Federation); Levan Dadiani, Boleslav (Czech Republic); and George Javakhishvili, Tbilisi (Georgia)
Assigned to PTP Plastic Technologies and Products B.V., Amsterdam (Netherlands)
Appl. No. 10/515,012 PCT Filed Oct. 16, 2002, PCT No. PCT/CZ02/00055 § 371(c)(1), (2), (4) Date Aug. 25, 2005, PCT Pub. No. WO03/104314, PCT Pub. Date Dec. 18, 2003.
Claims priority of application No. 2002-1799 (CZ), filed on May 23, 2002.
Prior Publication US 2006/0094793 A1, May 04, 2006
Int. Cl. C08J 11/04 (2006.01); C08G 63/00 (2006.01)

U.S. Cl. 521—48 [264/176.1; 264/219; 524/94; 524/381; 524/404; 525/418; 525/437; 525/438; 525/444; 525/464; 528/15; 528/31; 528/32; 528/35; 528/271; 528/272; 528/480]

6 Claims

1. A method for producing a modified polyester from waste processed polyester comprising:

1) shredding, washing, and dying waste processed polyester material;

2) adding a modifying agent mixture comprising:

a) hexamethyldisilazane;

b) tetraethoxysilane; and

wherein the modifying agent mixture is added in an amount of 4% to 6% by weight of the waste polyester;

3) heating the resulting mixture to obtain a melt; and

4) recovering a modified polyester.