公开(公告)号：US20180194053A1

公开(公告)日：2018-07-12

申请号：US15867849

申请日：2018-01-11

Applicant: SABIC Global Technologies B.V.

Inventor： Kevin Wassmer ,  Franklin Ehrensbeck ,  Robert Russell Gallucci ,  William E. Hollar, JR.

IPC: B29C47/00 ,  B29C47/78 ,  B29C47/88 ,  B29C45/00 ,  B29C33/62 ,  C08L69/00 ,  C08K5/00 ,  C08K5/3475 ,  C08K5/357

CPC classification number: B29C48/05 ,  B29B7/007 ,  B29B7/46 ,  B29B7/88 ,  B29B9/06 ,  B29B9/16 ,  B29C33/62 ,  B29C45/0001 ,  B29C48/0013 ,  B29C48/0022 ,  B29C48/793 ,  B29C48/911 ,  B29C2948/92209 ,  B29C2948/92247 ,  B29K2069/00 ,  B29L2011/0016 ,  C08J3/12 ,  C08J2369/00 ,  C08K5/0041 ,  C08K5/3475 ,  C08K5/357 ,  C08L69/00 ,  C08L2201/10 ,  G02B1/04 ,  G02B1/041

Abstract: Methods for producing transparent polycarbonate articles include melting a composition at a temperature of 300 to 390° C., extruding the melted composition to form a strand, cooling the strand of extruded composition, cutting the cooled strand into pellets, drying the pellets at a temperature of 50 to 140° C. and injecting molding or extruding the pellets at a temperature of 300 to 380° C. to form an article. The composition can comprise a moisture content of 0.1 to 5 wt. % and a crystalline additive having a melting point of at least 280° C., a heat of fusion greater than or equal to 1.0 Joule/gram (J/g). The composition can be cooled to at least 20° C. below the glass transition temperature of the polycarbonate.