NUCLEATING COMPOSITION AND THERMOPLASTIC POLYMER COMPOSITION COMPRISING SUCH NUCLEATING COMPOSITION
The invention relates to a nucleating composition comprising: (a) a first nucleating agent, which comprises a cyclic dicarboxylate salt compound; and (b) a second nucleating agent, which comprises talc, wherein the cyclic dicarboxylate salt compound has the formula (I):
1 . A nucleating composition comprising:
(a) a first nucleating agent, which comprises a cyclic dicarboxylate salt compound; and
(b) a second nucleating agent, which comprises talc,
wherein the cyclic dicarboxylate salt compound has the formula (I):
2 . A thermoplastic polymer composition, comprising
thermoplastic polymer,
an organic peroxide, and
the nucleating composition according to claim 1 , wherein said thermoplastic polymer is a heterophasic propylene copolymer comprising a matrix phase comprising propylene and a dispersed phase comprising an ethylene-alpha-olefin elastomer, wherein the heterophasic propylene copolymer has a melt flow index of at least 1.
3 . The thermoplastic polymer composition according to claim 2 ,
wherein the heterophasic propylene copolymer comprises from 60 to 92 wt % of the matrix phase and from 8 to 40 wt % of the dispersed phase,
wherein the matrix phase comprises a propylene homopolymer and/or a propylene copolymer comprising at least 90 wt % of propylene and up to 10 wt % of ethylene and/or at least one C 4 to C 10 alpha-olefin, and
wherein the ethylene-alpha-olefin elastomer of the dispersed phase comprises from 40 to 65 wt % of ethylene and from 35 to 60 wt % of at least one C 3 to C 10 alpha-olefin.
4 . The thermoplastic polymer composition according to claim 2 , wherein the heterophasic propylene copolymer has a melt flow index of less than 10 dg/min.
5 . The thermoplastic polymer composition according to claim 4 , wherein the matrix phase has a melt flow index of at least 1 dg/min.
6 . The thermoplastic polymer composition according to claim 4 , wherein the ethylene-alpha-olefin elastomer comprises from 40 to 60 wt % of ethylene and from 40 to 60 wt % of propylene.
7 . The thermoplastic polymer composition according to claim 4 , wherein the thermoplastic polymer composition has a melt flow index of at least 5 and less than 30 dg/min.
8 . The thermoplastic polymer composition according to claim 4 , wherein the thermoplastic polymer composition has a flexural modulus L of at least 1000 MPa.
9 . The thermoplastic polymer composition according to claim 4 , wherein the thermoplastic polymer composition has an Izod impact strength L (23° C., kJ/m 2 ) of at least 55.
10 . The thermoplastic polymer composition according to claim 2 , wherein the heterophasic propylene copolymer has a melt flow index of at least 10 dg/min.
11 . The thermoplastic polymer composition according to claim 10 , wherein the matrix phase has a melt flow index of at least 50 dg/min.
12 . The thermoplastic polymer composition according to claim 11 , wherein the thermoplastic polymer composition has a melt flow index of at least 30 dg/min.
13 . The thermoplastic polymer composition according to claim 10 , wherein the thermoplastic polymer composition has a flexural modulus L of at least 1400 MPa.
14 . The thermoplastic polymer composition according to claim 10 , wherein the thermoplastic polymer composition has an Izod impact strength L (23° C., kJ/m 2 ) of at least 5.
15 . A shaped article comprising the thermoplastic polymer composition according to claim 2 .
16 . The thermoplastic polymer composition according to claim 4 ,
wherein the thermoplastic polymer composition has a melt flow index of at least 5 and less than 30 dg/min,
wherein the matrix phase has a melt flow index of at least 1 dg/min and less than 50 dg/min,
wherein the ethylene-alpha-olefin elastomer comprises from 40 to 60 wt % of ethylene and from 40 to 60 wt % of propylene,
wherein the thermoplastic polymer composition has a flexural modulus L of at least 1000 MPa, and
wherein the thermoplastic polymer composition has an Izod impact strength L (23° C., kJ/m 2 ) of at least 55.
17 . The thermoplastic polymer composition according to claim 16 ,
wherein the thermoplastic polymer composition has a flexural modulus L of at least 1100 MPa,
wherein the thermoplastic polymer composition has an Izod impact strength L (23° C., kJ/m 2 ) of at least 60.
18 . A shaped article comprising the thermoplastic polymer composition according to claim 16 .
19 . The thermoplastic polymer composition according to claim 2 ,
wherein the heterophasic propylene copolymer has a melt flow index of at least 10 dg/min,
wherein the matrix phase has a melt flow index of at least 50 dg/min,
wherein the thermoplastic polymer composition has a melt flow index of at least 30 dg/min,
wherein the thermoplastic polymer composition has a flexural modulus L of at least 1400 MPa, and
wherein the thermoplastic polymer composition has an Izod impact strength L (23° C., kJ/m 2 ) of at least 5.
20 . The thermoplastic polymer composition according to claim 19 ,
wherein the thermoplastic polymer composition has a flexural modulus L of at least 1400 MPa, and
wherein the thermoplastic polymer composition has an Izod impact strength L (23° C., kJ/m 2 ) of at least 6.
21 . A shaped article comprising the thermoplastic polymer composition according to claim 19 .