公开(公告)号：EP4435032A1

公开(公告)日：2024-09-25

申请号：EP23163241.5

申请日：2023-03-21

申请人： SHPP Global Technologies B.V.

发明人： Chellamuthu, Manojkumar ,  Mahood, James A. ,  Hein, Christopher Luke

IPC分类号： C08G64/18 ,  C08G64/42

CPC分类号： C08G64/18 ,  C08G64/42 ,  C08L69/00 ,  C08G64/14 ,  C08G64/12

摘要： A thermoplastic composition includes: a first branched polycarbonate copolymer end-capped with 4-hydroxybenzonitrile (4-HBN) having a molecular weight M1; and a second branched polycarbonate copolymer end-capped with 4-HBN having a molecular weight M2. M1 is less than M2. Methods for determining entanglement molecular weight (Me) of a polycarbonate copolymer include: preparing a sample of a branched polycarbonate copolymer including a 1,1,1-tris-hydroxy-phenylethane (THPE) branching agent and that is end-capped with 4-HBN; determining phase angle (∂) versus complex modulus (G*) of the sample using a small amplitude oscillatory rheology process at a specified temperature; determining a minima in the ∂ of the sample; determining a plateau modulus (GN) of the sample from the determined minima of ∂; and calculating the Me of the sample from the GN.

公开(公告)号：EP4282919A1

公开(公告)日：2023-11-29

申请号：EP22175410.4

申请日：2022-05-25

申请人： SHPP Global Technologies B.V.

发明人： Chellamuthu, Manojkumar ,  Anderson, Zachary ,  Vollenberg, Peter Hendrikus Theodorus

IPC分类号： C08L69/00

摘要： A thermoplastic composition comprising a highly branched polycarbonate comprising 1.5-5.0 mole % branching, wherein the highly branched polycarbonate has a weight average molecular weight of 25,000-45,000 grams per mole; a branched polycarbonate comprising 0.1-1.0 mole % branching, wherein the branched polycarbonate has a weight average molecular weight of 25,000-45,000 grams per mole; a first poly(carbonate siloxane) having 30-70 wt% siloxane, a second poly(carbonate siloxane) having 5-15 wt% siloxane, and wherein the total siloxane content provided to the thermoplastic composition by the first and second poly(carbonate-siloxanes) is less than 4.17 wt%; and wherein the ratio of the siloxane content provided to the thermoplastic composition by the first poly(carbonate siloxane) to the siloxane content provided to the thermoplastic composition by the second poly(carbonate siloxane) is less than 6.7 to 1, a flame retardant comprising a phosphorous-nitrogen bond; optionally, an auxiliary polycarbonate.