Abstract:
The present disclosure relates to a polyolefin-based hot melt adhesive composition endowed, with a good balance between thermal properties, crystallinity, viscosity and adhesive properties, comprising: (A) 25-75 wt.% of a copolymer of butene- 1 with a Melt Flow Rate, measured according to 1SO 1133 (190°C, 2,16kg), higher than 1500; and (B) 75-25 wt.% of at least one additional component selected from among waxes, resins, plasticizers, additional polymers and mixtures thereof, wherein the amounts of A) and B) are referred to the total weight of A) + B).
Abstract:
The present disclosure relates to a polyolefin-based hot melt adhesive composition endowed, with a good, balance between thermal properties, crystallinity, viscosity and adhesive properties, comprising: (A) 28-75 wt.% of a copolymer of butene-1 with Melt Flow Rate values, measured according to ISO 1133 (190°C, 2,16kg), of from 200 to 1500 g/10min.; and (B) 25-72 wt.% of at least one additional component selected from among waxes, resins, plasticizers, additional polymers and mixtures thereof, wherein the amounts of A) and B) are referred to the total weight of A) + B).
Abstract:
A process for the polymerization of one or more olefins under solution polymerization conditions to produce a polymeric solution, said process comprising contacting the produced polymeric solution with one or more antioxidant compounds before or concurrently with subjecting the polymeric solution to a devolatilization step to separate the polymer from the unreacted monomers.
Abstract:
1 -butene/ethylene/propylene terpolymer containing: c) from 4 to 10 wt% of ethylene derived units, and d) from 2 tol0wt% of propylene derived units; the said terpolymer having the following properties: - distribution of molecular weights (Mw/Mn) measured by GPC lower than 3; - no melting point detectable at the DSC; - melting enthalpy, measured after 10 days of aging at room temperature, from 12 to 20 J/g
Abstract:
A butene-1 polymer composition having MFR values of from 400 to 2000 g/10 min, measured according to ISO 1133 at 190°C with a load of 2.16 kg, comprising: A) a butene-1 homopolymer or a copolymer of butene-1 with one or more comonomers selected from ethylene and higher alpha-olefins, having a copolymerized comonomer content of up to 5% by mole; B) a copolymer of butene-1 with one or more comonomers selected from ethylene and higher alpha-olefins, having a copolymerized comonomer content of from 6% to 20% by mole; said composition having a total copolymerized comonomer content from 4% to 15% by mole, referred to the sum of A) and B), and a content of fraction soluble in xylene at 0°C of 60% by weight or less, determined on the total weight of A) and B).
Abstract:
A 1-butene propylene ethylene terpolymer having a content of propylene derived units ranging from 0.1-10 % by weight and an ethylene derived units content ranging from 0.1 to 3 % by weight having the following properties: a) distribution of molecular weight Mw/Mn measured by GPC lower than 3.5; b) melting point (DSC) comprised between 60°C and 120°C; c) Content of 1-butene units in the form of isotactic pentads (mmmm) higher than 95%.
Abstract:
Butene-1 terpolymers having -a content of propylene derived units of 0.5-13 %mol, and -a content of ethylene derived units of1-3 %mol, -a ratio C3/C2 of the content of propylene and ethylene derived units is of from 1 to 10, said butene-1 terpolymers having a meltflow rateMIE,measured at 190°C /2.16 Kg of from 0.3 to 3 g/10min, and a molecular weight distribution curve determined by GPC with a ratio Mw/Mn of from 4 to 10, and the portion of molecular weights of 1x10 5 or lower, accounting for 22% or larger of the total area.
Abstract:
The present disclosure relates to copolymer of butene-1 with hexene-1, particularly suited for the preparation of pipes, having the following features: 1) a content of hexene-1 comonomer units from 2 to 4% by weight; 2) a melting temperature TmI equal to or higher than 115°C.
Abstract:
A gasket for closures comprising a polyolefin composition (I) containing A) from 25 to 62% by weight of a copolymer of butene-1 with ethylene having a copolymerized ethylene content of up to 18% by mole and no melting peak detectable at the DSC at the second heating scan; B) from 38 to 75% by weight, of (i) a propylene homopolymer, or (ii) a propylene copolymer, or (iii) a mixture of two or more of (i) and (ii), having a melting temperature T m , measured by DSC at the second heating scan, of from 130°C to 165°C; wherein the amounts of A) and B) are referred to the total weight of A) + B).
Abstract:
Extruded or molded profiles comprising a polyolefin composition consisting of 85% by weight or more of a copolymer of 1-butene with ethylene (A) having an ethylene copolymerized content up to 18 % bymol, and having Mw/Mn lower than 3, hardness shore A (measured according to ISO 868) lower than 90, no melting point (TmII) detectable at the DSC after cancelling the thermal history, melting enthalpy (ΔHf), measured by DSC after 10 days of aging at room temperature,comprised between 4 and 15 J/g; and up to 15% by weight of a propylene copolymer or a composition of copolymers of propylene (B) having a melting point from about 26°C to 200°C, isotactic index greater than 90%.