公开(公告)号：EP1856204A1

公开(公告)日：2007-11-21

申请号：EP05724962.5

申请日：2005-03-08

Applicant: INVISTA Technologies S.à.r.l.

Inventor： FLORES, Rodolfo, Agustin

IPC: C08L67/02

CPC classification number: C08K3/34 ,  C08K7/00 ,  Y10T428/251 ,  C08L67/02

Abstract: The present invention relates to thermoplastic compositions having; high dimensional stability at high temperatures. In particular it is directed to polyester compositions containing mica for use in dual-ovenable trays and clear lids for hot food containers. According to one embodiment, the present invention is directed to a polyester composition comprising a polyester containing greater than about 2 to less than about 10 weight % of a mica filler. According to another embodiment of the present invention the mica containing polyester is prepared by the addition of the mica during polymerization, using a buffer to minimize diethylene glycol formation. According to another embodiment of the present invention, the polyester composition containing greater than 2 to less than 10 weight % mica also contains an additive package of impact modifier, nucleating agent and pigment in a concentration from about 5 weight % to 20 weight of the total composition. According to another embodiment of the present invention, the polyester composition containing mica is thermoformed into a container, such as a food tray.