Abstract:
A propylene ethylene copolymer having: i) xylene soluble fraction at 25°C ranging from 30 wt% to 48 wt%; ii) intrinsic viscosity of the fraction soluble in xylene at 25°C ranging from 2.8 to 4.3 dl/g; iii) melt flow rate, MFR, measured according to ISO 1133 at 230 °C with a load of 2.16 kg, ranging from 0.2 g/10 min to 10 g/10 min; iv) an ethylene derived units content ranging from 10.3 wt% to 15.4 wt% v) the ethylene derived units content on the fraction insoluble in xylene at 25°C ranging from 6.1 wt% to 9.0 wt%; vi) the ethylene derived units content on the fraction soluble in xylene at 25°C ranging from 18.2. wt% to 30.2 wt%; vii) the 13C-NMR sequences PEP measured on the fraction insoluble in xylene at 25°C ranging from 4.1mol% to 6.5mol% and the 13C-NMR sequences PEP measured on the fraction soluble in xylene at 25°C ranging from 10.5 mol% to 14.2 mol%.
Abstract:
Thermoplastic vulcanizate elastomer obtained by dynamic vulcanization of a heterophasic polyolefin composition in presence of at least (i) an alkenyl-substituted alkoxysilane grafting agent and (ii) water; wherein said heterophasic polyolefin composition has flexural modulus equal to or lower than 150 MPa,and comprises: (a) a crystalline propylene homopolymer or copolymer of propylene with up to 15% of ethylene or other alpha-olefin comonomer(s), or their combinations, and (b) a copolymer or a composition of copolymers of ethylene with other alpha-olefins, containing from 15% to 40% of ethylene, said thermoplastic vulcanizate elastomer having compression set values in the range from 45 -65%, the ratio of elongation at break to compression set values over 10 and hardness shore A values below 90.
Abstract:
A propylene ethylene copolymer having: (i) an ethylene derived units content ranging from 2.0 wt% to 11.0 wt%; (ii) ) the fraction soluble in xylene at 25°C (Xs) ranging from 7.1 wt% to 28.5 wt%; (iii) the intrinsic viscosity of the fraction soluble in xylene at 25°C ranges from 3.2 dl/g to 5.6 dl/g; (iv) the melting point is higher than 140.0 °C and fulfils the following relation (I): Tm>155-1.4xC2 (I) (v) the flexural modulus is higher than 500MPa and fulfils the following relation (II) TM> 1900 - 285xC2+50xXs (II).
Abstract:
Thermoset polyolefin elastomer obtained by static curing with water a silane-grafted thermoplastic heterophasic polyolefin composition (I) having a flexural modulus equal to or lower than 150 MPa, and comprising: (a) a crystalline propylene homopolymer or copolymer of propylene with up to 15% by weight of ethylene or other alpha-olefin comonomer(s), or their combinations, and (b) a copolymer or a composition of copolymers of ethylene with other alpha-olefins containing from 15% by weight to less then 40% by weight of ethylene; said thermoset polyolefin elastomer having a compression set value of from 30 to 65%, a ratio of elongation at break to compression set values of above 8, and hardness shore A values below 90.
Abstract:
Thermoset polyolefin elastomer obtained by static curing with water a silane-grafted thermoplastic heterophasic polyolefin composition (I) having a flexural modulus equal to or lower than 150 MPa, and comprising: (a) a crystalline propylene homopolymer or copolymer of propylene with up to 15% by weight of ethylene or other alpha-olefin comonomer(s), or their combinations, and (b) a copolymer or a composition of copolymers of ethylene with other alpha-olefins containing from 15% by weight to less then 40% by weight of ethylene; said thermoset polyolefin elastomer having a compression set value of from 30 to 65%, a ratio of elongation at break to compression set values of above 8, and hardness shore A values below 90.
Abstract:
Thermoplastic vulcanizate elastomer obtained by dynamic vulcanization of a heterophasic polyolefin composition in presence of at least (i) an alkenyl-substituted alkoxysilane grafting agent and (ii) water; wherein said heterophasic polyolefin composition has flexural modulus equal to or lower than 150 MPa,and comprises: (a) a crystalline propylene homopolymer or copolymer of propylene with up to 15% of ethylene or other alpha-olefin comonomer(s), or their combinations, and (b) a copolymer or a composition of copolymers of ethylene with other alpha-olefins, containing from 15% to 40% of ethylene, said thermoplastic vulcanizate elastomer having compression set values in the range from 45 -65%, the ratio of elongation at break to compression set values over 10 and hardness shore A values below 90.