ETHYLENE / ALPHA-OLEFIN / NON-CONJUGATED POLYENE INTERPOLYMER COMPOSITIONS WITH LOW VISCOSITY AND FAST CURE RATES

Abstract

1. A composition comprising at least the following components: a) at least one ethylene / alpha-olefin / non-conjugated polyene interpolymer having a Mooney viscosity (ML1+4, 125°C) of 10 to 40, and b) at least one ethylene / alpha-olefin interpolymer having a melt viscosity (177°C) of 50,000 mPa·s or less, wherein the composition has a Mooney viscosity (ML1+4, 100°C) of 6.0 to 10.

Description

[Technical field]

[0001] REFERENCE TO RELATED APPLICATIONS This application claims the benefit of priority to U.S. Provisional Patent Application No. 63 / 265,652, filed December 17, 2021. [Background technology]

[0002] There is a need for polymer formulations for injection molding complex parts, such as complex profiles. In addition, such profiles are typically formed from foaming formulations. These formulations must have low viscosity to flow quickly and uniformly in the mold cavity, and a fast curing response to build elasticity and strength during the injection molding process. The development of such polymer formulations is an unmet need in the market.

[0003] No. 8,389,634 discloses a thermoplastic composition comprising: (i) from 1 weight percent to 99 weight percent of the total composition of at least one thermoplastic copolymer, such as a styrene block copolymer, and (ii) from 1 weight percent to 99 weight percent of the total composition of at least one homogeneously branched ethylene / alpha-olefin interpolymer, such as ethylene / 1-octene, having a density of 0.899 g / cc or less and a Brookfield viscosity of greater than 500 cP (350° F.). See Abstract. Other thermoplastic polymers include, but are not limited to, natural or synthetic resins such as styrene block copolymers, rubber, linear low density polyethylene (LLDPE), high density polyethylene (HDPE), low density polyethylene (LDPE), ethylene / vinyl acetate (EVA) copolymers, ethylene-carboxylic acid copolymers (EAA), ethylene acrylate copolymers, polybutylene, polybutadiene, nylon, polycarbonate, polyester, polypropylene, ethylene-propylene interpolymers such as ethylene-propylene rubber, ethylene-propylene-diene monomer rubber, chlorinated polyethylene, thermoplastic vulcanizates, ethylene ethylacrylate polymer (EEA), ethylene styrene interpolymer (ES), polyurethanes and graft-modified olefin polymers, and combinations of two or more of these polymers (see column 11, lines 1-16). See also column 2, lines 42-56, column 3, lines 7-22, and column 13, lines 58-column 14, line 3. The composition can be used in injection molding processes (see, e.g., column 11, lines 47-51, and column 13, lines 26-41).

[0004] China Patent Application Publication No. 107418061(A) (machine translated) discloses a polymer formulation for door weatherstrip sponge, which contains two kinds of ethylene / propylene / diene rubber, activated zinc oxide, stearic acid, dispersant, erucylamide, PEG 4000, POE, paraffin oil, carbon black, sulfur, moisture absorbent, accelerator, foaming agent and expansion agent (see abstract of machine translated). POE is a polyolefin elastomer (see page 4, first paragraph of machine translated).

[0005] WO 2006 / 004750 discloses compositions and methods for improving the adhesion of a film to a nonwoven, a film to another film, or a nonwoven to another nonwoven. Depending on the structure, improvements can be achieved by using low viscosity, low density ethylene- or propylene-based polymers that physically stick to the substrate to improve flow and adhesion, or by using similar polymers in blends (components A and B) with one of the substrate film polymers (see Abstract and claims 1-3). Useful polymers include thermoplastic compositions containing at least one low viscosity homogeneously branched ethylene polymer having a density of 0.855 g / cc to 0.899 g / cc at 350° F. and a Brookfield viscosity of at least 500 cP. The thermoplastic composition may contain at least 50 weight percent of the thermoplastic polymer, based on the total weight of the composition. Suitable examples of thermoplastic polymers include, but are not limited to, synthetic rubber, linear low density polyethylene (LLDPE), high density polyethylene (HDPE), low density polyethylene (LDPE), ethylene vinyl acetate (EVA) copolymers, polybutadiene, and ethylene-propylene-diene. Additional useful polymers include polymer blends containing isotactic polypropylene and alpha-olefin / propylene copolymers. See page 19, lines 3-17.

[0006] US Patent Application Publication No. 2015 / 0376385 discloses a composition comprising: A) an ethylene / alpha-olefin / diene interpolymer, B) a functionalized ethylene-based polymer selected from the group consisting of: a) an anhydride-grafted ethylene / alpha-olefin interpolymer, b) an acid-functionalized ethylene-based polymer, and c) an ester-functionalized ethylene-based polymer, and C) a crosslinker, wherein the weight ratio of component A to component B is 98:2 to 60:40 (see Abstract). In an embodiment, the ethylene / alpha-olefin / diene interpolymer is disclosed as having a Mooney viscosity (ML(1+4) at 125° C.) of 50 to 300 (see paragraph

[0068] ).

[0007] As mentioned above, there remains a need for polymer compositions with excellent compound flow and fast cure speed for injection molding of complex parts with good quality and strength, as well as improved part productivity. This need has been met by the following inventions: Summary of the Invention

[0008] At least the following ingredients: a) at least one ethylene / alpha-olefin / non-conjugated polyene interpolymer having a Mooney viscosity (ML1+4 at 125° C.) of 10 to 40, and b) at least one ethylene / alpha-olefin interpolymer having a melt viscosity (177°C) of 50,000 mPa·s or less; A composition comprising: The composition has a Mooney viscosity (ML1+4, 100°C) of 6.0 to 10. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] A composition has been discovered that has high flow rates and fast cure rates for injection molding of complex parts.

[0010] As mentioned above, at least the following ingredients: a) at least one ethylene / alpha-olefin / non-conjugated polyene interpolymer having a Mooney viscosity (ML1+4 at 125° C.) of 10 to 40, and b) at least one ethylene / alpha-olefin interpolymer having a melt viscosity (177°C) of 50,000 mPa·s or less; A composition comprising: A composition is provided, the composition having a Mooney viscosity (ML1+4, 100°C) of 6.0 to 10.

[0011] In one embodiment, or a combination of two or more embodiments, each described herein, at least one interpolymer of component a has a Mooney viscosity (ML1+4 at 125° C.) of 11 or more, or 12 or more, or 14 or more, or 16 or more, or 18 or more, or 20 or more. In one embodiment, or a combination of two or more embodiments, each described herein, at least one interpolymer of component a has a Mooney viscosity (ML1+4 at 125° C.) of 38 or less, or 36 or less, or 34 or less, or 32 or less, or 30 or less.

[0012] In one embodiment, or a combination of two or more embodiments, each described herein, the at least one interpolymer of component a has a viscosity of 0.850 g / cc or more, or 0.852 g / cc or more, or 0.854 g / cc or more, or 0.856 g / cc or more, or 0.858 g / cc or more, or 0.859 g / cc or more, or 0.860 g / cc or more, or 0.880 g / cc or more, or 0.890 g / cc or more, or 0.900 g / cc or more, or 0.910 g / cc or more, or 0.920 g / cc or more, or 0.950 g / cc or more (1 cc=1 cm 3In one embodiment, or a combination of two or more embodiments, each of which is described herein, the at least one interpolymer of component a has a density of 0.950 g / cc or less, or 0.920 g / cc or less, or 0.910 g / cc or less, or 0.900 g / cc or less, or 0.890 g / cc or less, or 0.880 g / cc or less, or 0.870 g / cc or less, or 0.868 g / cc or less, or 0.866 g / cc or less, or 0.864 g / cc or less, or 0.863 g / cc or less, or 0.862 g / cc or less, or 0.861 g / cc or less.

[0013] In one embodiment, or a combination of two or more embodiments, each of which is described herein, at least one interpolymer of component a is an ethylene / alpha-olefin / non-conjugated diene interpolymer, further an ethylene / alpha-olefin / non-conjugated diene terpolymer, further an EPDM.

[0014] In one embodiment, or a combination of two or more embodiments, each described herein, the at least one interpolymer of component b has a melt viscosity (177°C) of 5,000 mPa·s or more, or 5,500 mPa·s or more, or 6,000 mPa·s or more, or 6,200 mPa·s or more, or 6,400 mPa·s or more, or 6,600 mPa·s or more, or 6,800 mPa·s or more, or 7,000 mPa·s or more, or 7,200 mPa·s or more, or 7,400 mPa·s or more, or 7,600 mPa·s or more, or 7,800 mPa·s or more, or 8,000 mPa·s or more. In one embodiment, or a combination of two or more embodiments, each described herein, the at least one interpolymer of component b has a melt viscosity (177°C) of 45,000 mPa·s or less, or 40,000 mPa·s or less, or 35,000 mPa·s or less, or 30,000 mPa·s or less, or 28,000 mPa·s or less, or 26,000 mPa·s or less, or 24,000 mPa·s or less, or 22,000 mPa·s or less, or 20,000 mPa·s or less, or 18,000 mPa·s or less.

[0015] In one embodiment, or a combination of two or more embodiments, each of which is described herein, at least one interpolymer of component b has a density of 0.860 g / cc or more, or 0.862 g / cc or more, or 0.864 g / cc or more, or 0.866 g / cc or more, or 0.868 g / cc or more, or 0.870 g / cc or more. In one embodiment, or a combination of two or more embodiments, each of which is described herein, at least one interpolymer of component b has a density of 0.890 g / cc or less, or 0.885 g / cc or less, or 0.880 g / cc or less, or 0.879 g / cc or less, or 0.878 g / cc or less, or 0.877 g / cc or less, or 0.876 g / cc or less, or 0.875 g / cc or less, or 0.874 g / cc or less.

[0016] In one embodiment, or a combination of two or more embodiments, each of which is described herein, at least one interpolymer of component b has a melting point (Tm) of 50°C or more, or 55°C or more, or 58°C or more, or 60°C or more, or 62°C or more, or 64°C or more, or 65°C or more, or 66°C or more, or 67°C or more, or 68°C or more, and / or 85°C or less, or 82°C or less, or 80°C or less, or 78°C or less, or 76°C or less, or 74°C or less, or 73°C or less, or 72°C or less, or 71°C or less, or 70°C or less.

[0017] In one embodiment, or a combination of two or more embodiments, each described herein, at least one interpolymer of component b is an ethylene / alpha-olefin copolymer.

[0018] In one embodiment, or a combination of two or more embodiments, each described herein, the composition has a Mooney viscosity (ML 1+4 @ 100° C.) of 6.2 or more, or 6.4 or more, or 6.6 or more, or 6.8 or more, or 7.0 or more, or 7.1 or more, or 7.2 or more. In one embodiment, or a combination of two or more embodiments, each described herein, the composition has a Mooney viscosity (ML 1+4 @ 100° C.) of 9.5 or less, or 9.0 or less, or 8.7 or less, or 8.5 or less, or 8.2 or less, or 8.0 or less, or 7.5.

[0019] In one embodiment, or a combination of two or more embodiments, each described herein, the ratio of the density of the at least one interpolymer of component a to the density of the at least one interpolymer of component b is 0.970 or more, or 0.972 or more, or 0.974 or more, or 0.976 or more, or 0.978 or more, or 0.980 or more, or 0.982 or more, or 0.983 or more, or 0.984 or more, and / or 1.00 or less, or 0.998 or less, or 0.996 or less, or 0.994 or less, or 0.992 or less, or 0.991 or less, or 0.990 or less, or 0.989 or less.

[0020] In one embodiment, or a combination of two or more embodiments, each described herein, the weight ratio of component a to component b is 1.5 or more, or 1.6 or more, or 1.7 or more, or 1.8 or more, or 1.9 or more, or 2.0 or more, or 2.1 or more, or 2.2 or more, or 2.3 or more, or 2.4 or more, or 2.5 or more, or 2.6 or more, or 2.7 or more, or 2.8 or more, or 2.9 or more, or 3.0 or more, and / or 20 or more. or less, or 15 or less, or 12 or less, or 10 or less, or 9.5 or less, or 9.0 or less, or 8.5 or less, or 8.0 or less, or 7.5 or less, or 7.0 or less, or 6.5 or less, or 6.0 or less, or 5.5 or less, or 5.0 or less, or 4.8 or less, or 4.6 or less, or 4.4 or less, or 4.2 or less, or 4.1 or less, or 4.0 or less, or 3.0 or less, or 2.5 or less, or 2.0 or less.

[0021] In one embodiment, or a combination of two or more embodiments, each described herein, the composition comprises, based on the weight of the composition, 20 wt.% or more, or 22 wt.% or more, or 24 wt.% or more, or 26 wt.% or more, or 28 wt.% or more, or 30 wt.% or more, or 32 wt.% or more, or 34 wt.% or more, and / or 50 wt.% or less, or 48 wt.% or less, or 46 wt.% or less, or 44 wt.% or less, or 42 wt.% or less, or 40 wt.% or less, or 38 wt.% or less, or 36 wt.% or less of the sum of components a and b.

[0022] In one embodiment, or a combination of two or more embodiments, each described herein, the composition further comprises an oil (component c).

[0023] In one embodiment, or a combination of two or more embodiments, each described herein, the composition further comprises one or more fillers (component d).

[0024] In one embodiment, or a combination of two or more embodiments, each described herein, the composition further comprises at least one crosslinking agent, or even at least two crosslinking agents.

[0025] In one embodiment, or a combination of two or more embodiments, each described herein, the composition further comprises a swelling agent.

[0026] In one embodiment, or a combination of two or more embodiments, each described herein, the composition has a hardness of 2.00 dN when heat treated at a temperature of 180° C. * m / min or more, or 2.10dN * m / min or more, or 2.20dN * m / min or more, or 2.30dN * m / min or more, or 2.40dN * m / min or more, or 2.50dN * m / min or more, or 2.60dN * m / min or more, or 2.80dN * m / min or more, or 3.00dN * m / min or more, or 3.20dN * m / min or more, or 3.40dN * m / min or more, or 3.50dN * m / min or more, or 3.60dN * m / min or more and / or 5.00 dN * m / min or less, or 4.50dN * m / min or less, or 4.00dN * m / min or less, or 3.60dN * m / min or less, or 3.50dN * m / min or less [(MH-ML) / tc90] value, where MH, ML and tc90 values ​​are determined by the MDR as described herein.

[0027] Also provided is a crosslinked composition formed from the composition of any one embodiment, or combination of two or more embodiments, described herein.

[0028] Also provided is an article comprising at least one part formed from the composition of any one embodiment, or combination of two or more embodiments, described herein.

[0029] Also provided is a process for forming a crosslinked composition comprising heat treating the composition of any one embodiment, or combination of two or more embodiments, described herein.

[0030] Ingredient A The ethylene / alpha-olefin / non-conjugated polyene interpolymer described herein comprises, in polymerized form, ethylene, an alpha-olefin, and a non-conjugated polyene. The alpha-olefin may be either aliphatic or aromatic. The alpha-olefin may include, but is not limited to, C3-C20 alpha-olefins, further C3-C10 alpha-olefins, further C3-C8 alpha-olefins. In one embodiment, the interpolymer is an ethylene / propylene / non-conjugated diene interpolymer, further terpolymer, further EPDM. Suitable examples of non-conjugated polyenes include C4-C40 non-conjugated dienes. Non-conjugated dienes include, but are not limited to, 5-ethylidene-2-norbornene (ENB), 5-vinyl-2-norbornene (VNB), dicyclopentadiene, 1,4-hexadiene or 7-methyl-1,6-octadiene, and further from ENB, VNB, dicyclopentadiene or 1,4-hexadiene, and further from ENB or VNB, and further from ENB.

[0031] ingredient b Ethylene / alpha-olefin interpolymers include, in polymerized form, ethylene and alpha-olefins, including C3 to C20 alpha-olefins, further C3 to C10 alpha-olefins, further C3 to C8 alpha-olefins, such as, but not limited to, propylene, 1-butene, 1-hexene, and 1-octene.

[0032] Additives The composition of the present invention may include one or more additives.Suitable additives include, but are not limited to, fillers, plasticizers (e.g., oils), processing aids, stabilizers (e.g., antioxidants, antiozonants, UV stabilizers), crosslinkers, activators, expansion agents, sequestrants, and combinations thereof.Fillers include, but are not limited to, carbon black, calcium carbonate, talc, silicon oxide, aluminum oxide, kaolinite, montmorillonite, silicates (e.g., aluminum salts, magnesium salts, calcium salts), titanium dioxide, natural fibers, and synthetic fibers.

[0033] The oils include, but are not limited to, paraffin oil, naphthenic oil, and polyalkylbenzene oil. The blowing agents include, but are not limited to, azodicarbonamide (ADC), p,p'-oxybis-(benzenesulfonylhydrazide) (OBSH), isocyanates, and sodium bicarbonate.

[0034] Stabilizers include, but are not limited to, hindered phenols, bisphenols, thiobis-phenols, and substituted hydroquinones.Typically, one or more stabilizers are added to the polymer or polymer composition in "ppm" amounts.Processing aids include, but are not limited to, fatty acids and PEG compounds, oligomers, and polymers.

[0035] Crosslinkers include, but are not limited to, sulfur-based agents (e.g., elemental sulfur), tetramethylthiuram disulfide (TMTD), dipentamethylene-thiuram tetrasulfide (DPTT), 2-mercaptobenzothiazole (MBT), 2-mercaptobenzothiazolate disulfide (MBTS), zinc-2-mercaptobenozothiazolate (ZMBT), zinc diethyldithiocarbamate zinc (ZDEC), zinc dibutyldithiocarbamate (ZDBC), dipentamethylenethiuram tetrasulfide (DPTT), and mixtures thereof. Additional crosslinking agents include, but are not limited to, peroxides, phenolics, azides, vinyl silanes, hydrosilation agents, substituted ureas, substituted guanidines, substituted xanthates, substituted dithiocarbamates, and mixtures thereof.

[0036] definition Unless stated to the contrary, implicit from the context, or customary in the art, all parts and percentages are by weight and all test methods are current as of the filing date of this disclosure.

[0037] As used herein, the term "composition" includes a mixture of materials that make up the composition, as well as reaction products and decomposition products formed from the materials of the composition. Any reaction or decomposition products will typically be present in trace or residual amounts.

[0038] As used herein, the term "polymer" refers to a polymeric compound prepared by polymerizing monomers, whether of the same type or different types. Thus, the generic term polymer includes the term homopolymer (used to refer to a polymer prepared from only one type of monomer, with the understanding that trace amounts of impurities may be incorporated into the polymer structure), and the term interpolymer, as defined herein below. Trace amounts of impurities, such as catalyst residues, may be incorporated into and / or within the polymer. Typically, polymers are stabilized with very small amounts ("ppm" amounts) of one or more stabilizers.

[0039] As used herein, the term "interpolymer" refers to a polymer prepared by the polymerization of at least two different types of monomers. Thus, the term interpolymer includes the term copolymer (used to refer to a polymer prepared from two different types of monomers) and polymers prepared from more than two different types of monomers.

[0040] As used herein, the term "olefin-based polymer" refers to a polymer that contains, in polymerized form, at least 50 weight percent, or up to 50 weight percent (based on the weight of the polymer), of an olefin, such as ethylene or propylene, and may optionally contain one or more comonomers.

[0041] As used herein, the term "propylene-based polymer" refers to a polymer that, in polymerized form, contains at least 50 weight percent or at most 50 weight percent propylene (based on the weight of the polymer) and may optionally contain one or more comonomers.

[0042] As used herein, the term "ethylene-based polymer" refers to a polymer that, in polymerized form, contains at least 50 weight percent, or at most 50 weight percent, ethylene (based on the weight of the polymer) and may optionally contain one or more comonomers.

[0043] As used herein, the term "ethylene / alpha-olefin interpolymer" refers to a random interpolymer that comprises, in polymerized form, at least 50 weight percent or most weight percent (based on the weight of the interpolymer) of ethylene and an alpha-olefin.

[0044] As used herein, the term "ethylene / alpha-olefin / non-conjugated polyene interpolymer" refers to an interpolymer comprising, in polymerized form, ethylene, an alpha-olefin, and a non-conjugated polyene. In one embodiment, the "ethylene / alpha-olefin / non-conjugated polyene interpolymer" comprises, in polymerized form, at least 50% or a maximum of ethylene by weight (based on the weight of the interpolymer). As used herein, the term "ethylene / alpha-olefin / non-conjugated diene interpolymer" refers to an interpolymer comprising, in polymerized form, ethylene, an alpha-olefin, and a non-conjugated diene. In one embodiment, the "ethylene / alpha-olefin / non-conjugated diene interpolymer" comprises, in polymerized form, at least 50% or a maximum of ethylene by weight (based on the weight of the interpolymer). The terms "ethylene / alpha-olefin / non-conjugated polyene terpolymer" and "ethylene / alpha-olefin / non-conjugated diene terpolymer" are similarly defined; however, it is noted that for each, the terpolymer contains, in polymerized form, ethylene, alpha-olefin, and polyene (or diene) as the only three monomer types.

[0045] As used herein, the term "ethylene / alpha-olefin copolymer" refers to a random copolymer that contains, in polymerized form, at least 50% by weight (based on the weight of the copolymer) or a majority amount of ethylene and an alpha-olefin as the only two monomer types.

[0046] As used herein with respect to a polymer (or interpolymer or terpolymer or copolymer), the phrase "majority weight percent" refers to the amount of monomer that is most abundant in the polymer.

[0047] As used herein, the term "crosslinked composition" refers to a composition having a network structure due to the formation of chemical bonds between polymer chains, which can be indicated by an increase in the "MH-ML" difference as discussed herein.

[0048] As used herein with respect to compositions comprising components a and b described herein, the terms "heat treated", "heat treating", "heat treatment", and similar terms refer to the application of heat to the composition. Heat can be applied by conduction (e.g., heating coils), by convection (e.g., heat transfer via a fluid such as water or air), and / or by radiation (e.g., heat transfer using electromagnetic waves). Preferably, heat is applied by conduction and / or convection. It should be noted that the temperature at which heat treatment is carried out refers to the internal temperature of the device (or tunnel), such as an MDR machine, used to cure (or crosslink) the elastomer. Typically, the composition readily equilibrates to the temperature of the machine (less than 30 seconds).

[0049] The terms "comprising," "including," "having," and their derivatives are not intended to exclude the presence of any additional components, steps, or procedures, whether or not they are specifically disclosed. For the avoidance of doubt, all compositions claimed through the use of the term "comprising" may include any additional additives, adjuvants, or compounds, whether polymeric or not, unless stated to the contrary. In contrast, the term "consisting essentially of" excludes from the scope of any preceding recitation any other component, step, or procedure, except those that are not essential to operability. The term "consisting of" excludes any component, step, or procedure not specifically described or listed.

[0050] Listing some compositional features A] At least the following ingredients: a) at least one ethylene / alpha-olefin / non-conjugated polyene interpolymer having a Mooney viscosity (ML1+4 at 125° C.) of 10 to 40, and b) at least one ethylene / alpha-olefin interpolymer having a melt viscosity (177°C) of 50,000 mPa·s or less; A composition comprising: The composition has a Mooney viscosity (ML1+4, 100°C) of 6.0 to 10. B] The composition described in A] above, wherein at least one interpolymer of component a has a Mooney viscosity (ML1+4 at 125°C) of 11 or more, or 12 or more, or 14 or more, or 16 or more, or 18 or more, or 20 or more (Mooney units = MU). C] The composition described in A] or B] above, wherein at least one interpolymer of component a has a Mooney viscosity (ML1+4 at 125°C) of 38 or less, or 36 or less, or 34 or less, or 32 or less, or 30 or less. D] At least one interpolymer of component a has a density (1 cc = 1 cm) of 0.850 g / cc or more, or 0.852 g / cc or more, or 0.854 g / cc or more, or 0.856 g / cc or more, or 0.858 g / cc or more, or 0.859 g / cc or more, or 0.860 g / cc or more, or 0.880 g / cc or more, or 0.890 g / cc or more, or 0.900 g / cc or more, or 0.910 g / cc or more, or 0.920 g / cc or more, or 0.950 g / cc or more. 3 The composition according to any one of A] to C] above, wherein A] is a hydroxyl group or a carboxyl group. E] At least one interpolymer of component a has a density of 0.950 g / cc or less, or 0.920 g / cc or less, or 0.910 g / cc or less, or 0.900 g / cc or less, or 0.890 g / cc or less, or 0.880 g / cc or less, or 0.870 g / cc or less, or 0.868 g / cc or less, or 0.866 g / cc or less, or 0.864 g / cc or less, or 0.863 g / cc or less, or 0.862 g / cc or less, or 0.861 g / cc or less. The composition according to any one of A] to D] above. F] The composition according to any one of A] to E] above, wherein at least one interpolymer of component a comprises, in polymerized form, 4.5 wt% or more, or 4.6 wt% or more, or 4.7 wt% or more, or 4.8 wt% or more, or 4.9 wt% or more, or 5.0 wt% or more, and / or 9.0 wt% or less, or 8.9 wt% or less, or 8.8 wt% or less, or 8.7 wt% or less, or 8.6 wt% or less, or 8.5 wt% or less of a polyene, based on the weight of the interpolymer. Further, the polyene is a diene, further ENB. G] The composition according to any one of A] to F] above, wherein at least one interpolymer of component a contains, in polymerized form, based on the weight of the interpolymer, 45 wt.% or more, or 46 wt.% or more, or 47 wt.% or more, or 48 wt.% or more, or 49 wt.% or more, or 50 wt.% or more of C2 (ethylene), and / or 60 wt.% or less, or 59 wt.% or less, or 58 wt.% or less, or 57 wt.% or less, or 56 wt.% or less, or 55 wt.% or less of C2 (ethylene). H] The composition according to any one of A] to G] above, wherein at least one interpolymer of component a has a molecular weight distribution (MWD) of 1.8 or more, or 2.0 or more, or 2.2 or more, or 2.4 or more, or 2.6 or more, or 2.8 or more, and / or 5.0 or less, or 4.7 or less, or 4.5 or less, or 4.2 or less, or 4.0 or less, or 3.8 or less, or 3.6 or less, or 3.4 or less, or 3.2 or less, or 3.0 or less. I] The composition according to any one of A] to H] above, wherein at least one interpolymer of component a is an ethylene / alpha-olefin / non-conjugated diene interpolymer, or an ethylene / alpha-olefin / non-conjugated diene terpolymer, or EPDM. J] The composition according to any one of A] to I] above, wherein the alpha-olefin of at least one interpolymer of component a is a C3 to C20 alpha-olefin, or a C3 to C10 alpha-olefin, or one of propylene, 1-butene, 1-hexene, or 1-octene, or one of propylene, 1-butene, or 1-octene, or one of propylene or 1-octene, or propylene. K] The composition according to any one of A] to J] above, wherein the polyene of at least one interpolymer of component a is a diene, further ENB. L] The composition according to any one of A] to K] above, wherein component a comprises one or two ethylene / alpha-olefin / non-conjugated polyene interpolymers, or one or two ethylene / alpha-olefin / non-conjugated diene interpolymers, or one or two ethylene / alpha-olefin / non-conjugated diene terpolymers, or one or two EPDMs. M] The composition according to any one of the above L], wherein component a comprises one ethylene / alpha-olefin / non-conjugated polyene interpolymer, or one ethylene / alpha-olefin / non-conjugated diene interpolymer, or one ethylene / alpha-olefin / non-conjugated diene terpolymer, or one EPDM. N] The composition according to any one of the above L], wherein component a comprises two ethylene / alpha-olefin / non-conjugated polyene interpolymers, or two ethylene / alpha-olefin / non-conjugated diene interpolymers, or two ethylene / alpha-olefin / non-conjugated diene terpolymers, or two EPDMs. O] At least one interpolymer of component b has a melt viscosity (177°C) of 5,000 mPa·s or more, or 5,500 mPa·s or more, or 6,000 mPa·s or more, or 6,200 mPa·s or more, or 6,400 mPa·s or more, or 6,600 mPa·s or more, or 6,800 mPa·s or more, or 7,000 mPa·s or more, or 7,200 mPa·s or more, or 7,400 mPa·s or more, or 7,600 mPa·s or more, or 7,800 mPa·s or more, or 8,000 mPa·s or more. Any one of the compositions A] to N] above. P] The composition according to any one of A] to O] above, wherein at least one interpolymer of component b has a melt viscosity (177°C) of 45,000 mPa·s or less, or 40,000 mPa·s or less, or 35,000 mPa·s or less, or 30,000 mPa·s or less, or 28,000 mPa·s or less, or 26,000 mPa·s or less, or 24,000 mPa·s or less, or 22,000 mPa·s or less, or 20,000 mPa·s or less, or 18,000 mPa·s or less. Q] At least one interpolymer of component b has a density of 0.860 g / cc or more, or 0.862 g / cc or more, or 0.864 g / cc or more, or 0.866 g / cc or more, or 0.868 g / cc or more, or 0.870 g / cc or more. A composition according to any one of A] to P] above. R] At least one interpolymer of component b has a density of 0.890 g / cc or less, or 0.885 g / cc or less, or 0.880 g / cc or less, or 0.879 g / cc or less, or 0.878 g / cc or less, or 0.877 g / cc or less, or 0.876 g / cc or less, or 0.875 g / cc or less, or 0.874 g / cc or less. The composition according to any one of A] to Q] above. S] At least one interpolymer of component b has a melt index (I2) of 400 dg / min or more, or 420 dg / min or more, or 440 dg / min or more, or 460 dg / min or more, or 480 dg / min or more, or 500 dg / min or more, and / or 1,500 dg / min or less, or 1,450 dg / min or less, or 1,400 dg / min or less, or 1,350 dg / min or less, or 1,300 dg / min or less, or 1,250 dg / min or less, or 1,200 dg / min or less, or 1,150 dg / min or less, or 1,100 dg / min or less, or 1,050 dg / min or less, or 1,000 dg / min or less. T] At least one interpolymer of component b has a crystallinity percentage of 10% or more, or 11% or more, or 12% or more, or 13%, or 14% or more, or 15% or more, or 16% or more, and / or 25% or less, or 24% or less, or 23% or less, or 22% or less, or 21% or less, or 20% or less, or 19% or less, or 18% or less. A composition described in any one of A] to S] above. U] At least one interpolymer of component b has a melting point (Tm) of 50°C or higher, or 55°C or higher, or 58°C or higher, or 60°C or higher, or 62°C or higher, or 64°C or higher, or 65°C or higher, or 66°C or higher, or 67°C or higher, or 68°C or higher, and / or 85°C or lower, or 82°C or lower, or 80°C or lower, or 78°C or lower, or 76°C or lower, or 74°C or lower, or 73°C or lower, or 72°C or lower, or 71°C or lower, or 70°C or lower. V] At least one interpolymer of component b has a temperature of -70°C or higher, or -68°C or higher, or -66°C or higher; or -64°C or higher, or -62°C or higher, or -60°C or higher, or -59°C or higher, or -58°C or higher, and / or -40°C or lower, or -42°C or lower, or The composition according to any one of A] to U] above, having a glass transition temperature (Tg) of -44°C or lower, or -46°C or lower, or -48°C or lower, or -50°C or lower, or -52°C or lower, or -54°C or lower, or -55°C or lower, or -56°C. W] At least one interpolymer of component b has a molecular weight distribution (MWD) of 1.7 or more, or 1.8 or more, or 1.9 or more, or 2.0 or more, or 2.1 or more, or 2.2 or more, or 2.3 or more, and / or 3.5 or less, or 3.2 or less, or 3.0 or less, or 2.8 or less, or 2.7 or less, or 2.6 or less, or 2.5 or less, or 2.4 or less. Any one of A] to V] above. X] At least one interpolymer of component b has a number average molecular weight (Mn) of 5,000 g / mol or more, or 6,000 g / mol or more, or 7,000 g / mol or more, or 8,000 g / mol or more, or 9,000 g / mol or more, or 10,000 g / mol or more, or 12,000 g / mol or more, or 14,000 g / mol or more, or 16,000 g / mol or more, or 18,000 g / mol or more, or 20,000 g / mol or more, and / or 30,000 g / mol or less, or 28,000 g / mol or less, or 26,000 g / mol or less, or 24,000 g / mol or less. The composition according to any one of A] to W] above. Y] At least one interpolymer of component b has a weight average molecular weight (Mw) of 15,000 g / mol or more, or 17,000 g / mol or more, or 20,000 g / mol or more, or 22,000 g / mol or more, or 25,000 g / mol or more, or 27,000 g / mol or more, or 30,000 g / mol or more, or 32,000 g / mol or more, or 35,000 g / mol or more, and / or 60,000 g / mol or less, or 55,000 g / mol or less, or 50,000 g / mol or less, or 48,000 g / mol or less, or 45,000 g / mol or less, or 42,000 g / mol or less, or 40,000 g / mol or less. The composition according to any one of A] to X] above. Z] The composition according to any one of A] to Y] above, wherein at least one interpolymer of component b is an ethylene / alpha-olefin copolymer. A2] The composition according to any one of the above A] to Z], wherein the alpha-olefin of at least one interpolymer of component b is a C3 to C20 alpha-olefin, or a C3 to C10 alpha-olefin, or one of propylene, 1-butene, 1-hexene or 1-octene, or one of propylene, 1-butene or 1-octene, or one of 1-butene or 1-octene, or 1-octene. B2] The composition according to any one of A] to A2] above, wherein component b comprises one or two ethylene / alpha-olefin interpolymers, or one or two ethylene / alpha-olefin copolymers. C2] The composition according to any one of the above B2], wherein component b comprises one ethylene / alpha-olefin interpolymer or one ethylene / alpha-olefin copolymer. D2] The composition according to any one of the above B2], wherein component b comprises two ethylene / alpha-olefin interpolymers or two ethylene / alpha-olefin copolymers. E2] The composition according to any one of A] to D2] above, having a Mooney viscosity (ML1+4 at 100°C) of 6.2 or more, or 6.4 or more, or 6.6 or more, or 6.8 or more, or 7.0 or more, or 7.1 or more, or 7.2 or more, or 7.3 or more. F2] The composition according to any one of A] to E2] above, having a Mooney viscosity (ML1+4 at 100°C) of 9.5 or less, or 9.0 or less, or 8.7 or less, or 8.5 or less, or 8.2 or less, or 8.0 or less, or 7.5 or less. G2] The ratio of the density of the at least one interpolymer of component a to the density of the at least one interpolymer of component b is 0.970 or more, or 0.972 or more, or 0.974 or more, or 0.976 or more, or 0.978 or more, or 0.980 or more, or 0.982 or more, or 0.983 or more, or 0.984 or more, and / or 1.00 or less, or 0.998 or less, or 0.996 or less, or 0.994 or less, or 0.992 or less, or 0.991 or less, or 0.990 or less, or 0.989 or less. The composition according to any one of A] to F2] above. H2] The composition according to any one of A] to G2] above, wherein the weight ratio of component a to component b is 1.5 or more, or 1.6 or more, or 1.7 or more, or 1.8 or more, or 1.9 or more, or 2.0 or more, or 2.1 or more, or 2.2 or more, or 2.3 or more, and / or 20 or less, or 15 or less, or 12 or less, or 10 or less, or 9.5 or less, or 9.0 or less, or 8.5 or less, or 8.0 or less, or 7.5 or less, or 7.0 or less, or 6.5 or less, or 6.0 or less, or 5.5 or less, or 5.0 or less, or 4.8 or less, or 4.6 or less, or 4.4 or less, or 4.2 or less, or 4.1 or less, or 4.0 or less. I2] The composition according to any one of A] to H2] above, comprising, based on the weight of the composition, 20 wt% or more, or 22 wt% or more, or 24 wt% or more, or 26 wt% or more, or 28 wt% or more, or 30 wt% or more, or 32 wt% or more, or 34 wt% or more, and / or 50 wt% or less, or 48 wt% or less, or 46 wt% or less, or 44 wt% or less, or 42 wt% or less, or 40 wt% or less, or 38 wt% or less, or 36 wt% or less of the total of components a and b. J2] The composition according to any one of A] to I2] above, comprising, based on the weight of the composition, 15 wt% or more, or 17 wt% or more, or 19 wt% or more, or 20 wt% or more, or 21 wt% or more, or 22 wt% or more, or 23 wt% or more, or 24 wt% or more, and / or 40 wt% or less, or 38 wt% or less, or 36 wt% or less, or 35 wt% or less, or 34 wt%, 33 wt% or less, or 32 wt% or less, or 31 wt% or less, or 30 wt% of component a. K2] The composition according to any one of A] to J2] above, comprising, based on the weight of the composition, 2.0 wt.% or more, or 2.2 wt.% or more, or 2.4 wt.% or more, or 2.6 wt.% or more, or 2.8 wt.% or more, or 3.0 wt.% or more, or 3.1 wt.% or more, or 3.2 wt.% or more, or 3.3 wt.% or more, or 3.4 wt.% or more, or 3.5 wt.% or more, and / or 20 wt.% or less, or 18 wt.% or less, or 16 wt.%, 14 wt.% or less, or 13 wt.% or less, or 12 wt.% or less, or 11 wt.% of component b. L2] The composition described in any one of A] to K2] above, further comprising an oil (component c). M2] The composition according to L2] above, comprising at least 6.0 wt.%, or at least 8.0 wt.%, or at least 10 wt.%, or at least 12 wt.%, or at least 14 wt.%, or at least 16 wt.%, or at least 17 wt.%, and / or at most 40 wt.%, or at most 38 wt.%, or at most 35 wt.%, or at most 32 wt.%, or at most 30 wt.%, at most 28 wt.%, or at most 26 wt.%, or at most 24 wt.%, or at most 22 wt.%, or at most 20 wt.%, based on the weight of the composition, of component c. N2] A composition according to L2] or M2] above, in which the weight ratio of component a to component c is 0.8 or more, or 0.9 or more, or 1.0 or more, or 1.1 or more, or 1.2 or more, or 1.3 or more, or 1.4 or more, and / or 3.0 or less, or 2.8 or less, or 2.6 or less, or 2.5 or less, or 2.4 or less, or 2.3 or less, or 2.2 or less, or 2.1 or less, or 2.0 or less, or 1.9 or less, or 1.8 or less. O2] The composition according to any one of A] to N2] above, further comprising one or more fillers (component d). P2] The composition according to O2] above, comprising two fillers (component d), the amount of the first filler being ≧ the amount of the second filler, and further each filler being one type of carbon black. Q2] The composition described in P2] above, in which the weight ratio of the first filler to the second filler is 1.0 or more, or 1.1 or more, or 1.2 or more, and / or 3.0 or less, or 2.7 or less, or 2.5 or less, or 2.0 or less, or 1.8 or less, or 1.6 or less, or 1.5 or less, or 1.4 or less, or 1.3 or less. R2] The composition according to any one of O2] to Q2] above, comprising, based on the weight of the composition, 6.0 wt.% or more, or 8.0 wt.% or more, or 10 wt.% or more, or 12 wt.% or more, or 14 wt.% or more, or 16 wt.% or more, or 18 wt.% or more, and / or 40 wt.% or less, or 38 wt.% or less, or 35 wt.% or less, or 32 wt.% or less, or 30 wt.%, 28 wt.% or less, or 26 wt.% or less, or 24 wt.% or less, or 22 wt.% or less, or 20 wt.% or less of component b. S2] The composition according to any one of the above O2] to R2], wherein the weight ratio of component a to component c is 0.8 or more, or 0.9 or more, or 1.0 or more, or 1.1 or more, or 1.2 or more, and / or 3.0 or less, or 2.8 or less, or 2.6 or less, or 2.4 or less, or 2.2 or less, or 2.0 or less, or 1.9 or less, or 1.8 or less, or 1.7 or less. T2] The composition according to any one of A] to S2] above, further comprising at least one crosslinking agent, or at least two crosslinking agents. U2] At least one crosslinking agent, and even at least two crosslinking agents, are selected from sulfur, MBT, CBS, DPTT, ZDEC or The composition described in T2] above, selected from any combination thereof. V2] A composition according to T2] or U2] above, comprising at least one crosslinker, and further at least two crosslinkers, in an amount of at least 0.04 phr, or at least 0.06 phr, or at least 0.08 phr, or at least 0.10 phr, or at least 0.20 phr, or at least 0.50 phr, or at least 1.0 phr, and / or at most 5.0 phr, or at most 4.5 phr, or at most 4.0 phr, or at most 3.7 phr, or at most 3.0 phr, or at most 2.5 phr, or at most 2.0 phr, based on 100 parts of components a and b. W2] The composition described in any one of A] to V2] above, further comprising a swelling agent. X2] The composition described in W2] above, wherein the swelling agent is selected from ADC and / or OBSH. Y2] A composition as described in W2] or X2] above, comprising 0.50 phr or more, or 1.0 phr or more, or 1.5 phr or more, or 2.0 phr or more, or 3.0 phr or more, or 4.0 phr or more, or 4.5 phr or more, and / or 10 phr or less, or 9.0 phr or less, or 8.0 phr or less, or 7.0 phr or less, or 6.0 phr or less, or 5.5 phr or less of swelling agent, based on 100 parts of components a and b. Z2] A composition according to any one of A]-Y2] above, having a "tc90" value of 0.80 minutes or more, or 0.90 minutes or more, or 1.00 minutes or more, or 1.10 minutes or more, or 1.20 minutes or more, or 1.30 minutes or more, or 1.40 minutes or more, or 1.50 minutes or more, or 1.60 minutes or more, or 1.70 minutes or more, or 1.80 minutes or more, and / or 3.00 minutes or less, or 2.80 minutes or less, or 2.60 minutes or less, or 2.40 minutes or less, or 2.20 minutes or less, or 2.00 minutes or less, or 1.90 minutes or less, or 1.85 minutes or less, when heat treated at a temperature of 180° C. The tc90 value is determined by MDR as described herein. A3] When heat treated at 180℃, it becomes 2.00dN * m / min or more, or 2.10dN *m / min or more, or 2.20dN * m / min or more, or 2.30dN * m / min or more, or 2.40dN * m / min or more, or 2.50dN * m / min or more, or 2.60dN * m / min or more, or 2.80dN * m / min or more, or 3.00dN * m / min or more, or 3.50dN * m / min or more and / or 5.00 dN * m / min or less, or 4.50dN * m / min or less, or 4.00dN * m / min or less, or 3.50dN * The composition according to any one of A] to Z2] above, having a [(MH-ML) / tc90] value of not more than m / min, wherein the MH, ML and tc90 values ​​are determined according to the MDR as described herein. B3] A composition according to any one of A]-A3] above, having a "ts2" value of 0.90 minutes or more, or 0.95 minutes or more, or 1.00 minutes or more, and / or 1.50 minutes or less, or 1.45 minutes or less, or 1.40 minutes or less, or 1.35 minutes or less, or 1.30 minutes or less, or 1.25 minutes or less, or 1.20 minutes or less, or 1.18 minutes or less, or 1.15 minutes or less, when heat treated at a temperature of 180° C. The ts2 value is determined by MDR as described herein. C3] The composition according to any one of A] to B3] above, having a foam density of 0.64 g / cc or more, or 0.65 g / cc or more, or 0.66 g / cc or more to 0.74 g / cc or less, or 0.72 g / cc or less, or 0.70 g / cc or less, or 0.68 g / cc or less after heat treatment at a temperature of 180°C for a time period of 1.0 minute to 2.0 minutes. D3] The composition according to any one of A] to C3] above, further comprising a thermoplastic polymer different from component a in one or more characteristics such as monomer type, monomer amount, density, Mooney viscosity (ML1+4, 125°C), or any combination thereof, wherein the thermoplastic polymer differs from component b in one or more characteristics such as monomer type, monomer amount, density, melt viscosity (177°C), crystallinity percentage, or any combination thereof. E3] A crosslinked composition formed from the composition described in any one of A] to D3] above. F3] An article comprising at least one part formed from a composition according to any one of A] to E3] above. G3] The article according to F3] above, which is an injection molded article, a transfer molded article, an extrusion molded article, a thermomolded article or a compression molded article, further an injection molded article, a transfer molded article or a compression molded article, further an injection molded article. H3] An article described in F3] or G3] above, selected from an automobile part, a building material, a roofing membrane, a wire or cable jacket, a flooring material, a computer part, a gasket, or a tire. I3] An article as described in F3] or G3] above, which is a window profile. J3] A process for forming a crosslinked composition, comprising heat treating the composition according to any one of A] to D3] above. K3] The process according to J3] above, wherein the composition is heat treated at a temperature of 100°C or more, or 110°C or more, or 120°C or more, or 130°C or more, or 140°C or more, or 150°C or more, or 160°C or more, or 170°C or more, or 175°C or more, or 178°C or more, or 180°C or more. L3] The process of J3] or K3] above, wherein the composition is heat treated at a temperature of 220°C or less, or 210°C or less, or 205°C or less, or 200°C or less, or 195°C or less, or 190°C or less, or 187°C or less, or 185°C or less. L4] The composition according to any one of A] to L3] above, wherein component a comprises at least two interpolymers. In other words, component a is composed of a first interpolymer and a second interpolymer. L5] The composition according to any one of A] to C3] above, wherein component a comprises at least one interpolymer having a density of 0.856 g / cc to 0.864 g / cc and at least one interpolymer having a density of 0.865 g / cc to 0.910 g / cc. L6] The composition according to any one of A] to C3] above, wherein component a comprises at least one interpolymer having a Mooney viscosity (ML1+4 at 125°C) of 30MU to 35MU and at least one interpolymer having a Mooney viscosity (ML1+4 at 125°C) of 15MU to 20MU. L7] The composition according to any one of A] to L3] above, wherein component a is composed of at least a first interpolymer having a density of 0.856 g / cc to 0.864 g / cc and a second interpolymer having a density of 0.865 g / cc to 0.910 g / cc. L8] The composition according to any one of the above A] to L3], wherein component a is composed of at least a first interpolymer having a Mooney viscosity (ML1+4 at 125°C) of 30MU to 35MU and a second interpolymer having a Mooney viscosity (ML1+4 at 125°C) of 15MU to 20MU.

[0051] Test Method Moving Die Rheometer (MDR) The cure properties of the compositions were measured according to ASTM D5289-19 using an Alpha Moving Die Rheometer (MDR-2000) at 180°C with an arc of 0.5 degrees. Sample size: 25±2 grams. In this method, the ML (dNm) value refers to the minimum torque recorded by the rheometer and is a measure of the stiffness and viscosity of the composition at a given temperature. The lower the ML value, the better the composition flows before being fully crosslinked.

[0052] The MH (dNm) value refers to the maximum torque recorded by the rheometer and is a measure of the crosslink density of the crosslinked composition. An increase in the MH value indicates an increase in crosslink density. The higher the crosslink density, the better the cure rate in a mold, such as a mold used in an injection molding process.

[0053] The MH-ML (dNm) range refers to the difference in torque recorded by the rheometer. This torque range indicates the amount of crosslinking that occurred during the test, and this range is related to the shear modulus of the composition. The larger the torque range, the higher the crosslink density and the greater the elastic recovery force of the crosslinked composition. A larger elastic recovery force can help improve the recovery properties of injection molded parts.

[0054] The tc90 value represents the cure time to reach 90% cure (i.e. 90% of the "MH-ML" value). This is the time it takes for the cured rubber to reach 90% of the maximum achievable torque range. Therefore, especially for injection molding processes, shorter tc90 values ​​are preferred, as shorter times help to shorten the cure cycle time, providing better manufacturability of injection molded parts. Note that the tc50 value represents the time to reach 50% cure (i.e. 50% of the "MH-ML" value).

[0055] The ts2 value refers to the scorch time, i.e., the point at which curing actually begins. A higher ts2 value will result in a rough surface due to the delayed curing effect in the composition. However, if the ts2 value is too short, the composition may scorch before it completely flows into the mold.

[0056] Overall, the best compositions have the following characteristics: low ML values ​​for good flow of the composition, high MH and MH-ML values ​​for good crosslink density, low tc90 values ​​(e.g., 1.4 min to 1.9 min) for optimal cure speed and short product set time, and low ts2 values ​​(e.g., 1.0 min to 1.5 min) to reduce the possibility of scorch.

[0057] Mooney Viscosity of Polymers (oil-free, unfilled) The Mooney Viscosity (ML1+4 at 125°C) of each EPDM (neat form) is measured according to ASTM D1646 with a 1 minute preheat time and a "4 minute" rotor run time. The instrument is an Alpha Technologies MV2000E Viscometer. The sample size is around 25 grams.

[0058] Mooney Viscosity of the Composition The Mooney viscosity (ML 1+4 at 100° C.) of each composition was measured at 100° C. (large rotor) using an Alpha Technologies MV2000E viscometer according to ASTM D1646. The preheat time was 1 minute and the rotor run time was 4 minutes. The Mooney viscosity of each formulated composition was measured using approximately 25 grams of an uncured blanket or sheet (see Experimental Section).

[0059] Polymer Density Polymer density is measured according to ASTM D297.

[0060] Melt Index The melt index (I2) of ethylene-based polymers is measured according to ASTM D-1238, condition 190° C. / 2.16 kg. The melt flow rate (MFR) of propylene-based polymers is measured according to ASTM D-1238, condition 230° C. / 2.16 kg.

[0061] FTIR Method for EPDM Composition Analysis EPDM terpolymers containing ethylene, propylene and 5-ethylidene-2-norbornene were analyzed for ethylene content using ASTM D3900 and for ethylidene-norbornene (ENB) content using ASTM D6047. Similar analyses can be used to measure the monomer content (e.g., C2, alpha-olefins or dienes) of other interpolymers and terpolymers.

[0062] Melt Viscosity Melt viscosity was measured according to ASTM D1084 using a Brookfield Viscometer (Model DV0III, Version 3) and an SC-31 hot melt viscometer spindle at a temperature of 177° C. (350° F.) Sample size was approximately 8-10 gram pellets.

[0063] Differential Scanning Calorimetry (DSC) Differential scanning calorimetry (DSC) is used to measure the Tm, Tc, Tg and crystallinity of ethylene-based (PE) and propylene-based (PP) polymer samples. Each sample (0.5 g) is compression molded into a film at 25000 psi for 10-15 seconds at 190°C. Approximately 5 mg to 8 mg of film sample is weighed and placed into a DSC pan. A lid is crimped onto the pan to ensure a sealed environment. The sample pan is placed into the DSC cell and heated at a rate of approximately 10°C / min to a temperature of 180°C for PE (230°C for PP). The sample is held at this temperature for 3 minutes. The sample is then cooled at a rate of 10°C / min to -90°C for PE (-60°C for PP) and held isothermal at that temperature for 3 minutes. The sample is then heated at a rate of 10°C / min until completely melted (second heat). Unless otherwise stated, the melting point (Tm) and glass transition temperature (Tg) of each polymer sample are determined from the second heat curve, and the crystallization temperature (Tc) is determined from the first cooling curve. The Tg and the respective peak temperatures of Tm and Tc are noted. The percent crystallinity can be calculated by dividing the heat of fusion (Hf) determined from the second heat curve by the theoretical heat of fusion of 292 J / g for PE (165 J / g for PP) and multiplying this amount by 100 (e.g., % crystallinity = (Hf / 292 J / g) x 100 for PE).

[0064] Gel Permeation Chromatography The chromatography system consisted of a PolymerChar GPC-IR (Valencia, Spain) high temperature GPC chromatograph with a built-in IR5 infrared detector (IR5). The autosampler oven compartment was set at 160 degrees Celsius and the column compartment was set at 150 degrees Celsius. The columns were four AGILENT "MixedA" 30 cm, 20 micron linear mixed bed columns. The chromatography solvent was 1,2,4-trichlorobenzene containing 200 ppm butylated hydroxytoluene (BHT). The solvent source was nitrogen sparged. The injection volume was 200 microliters and the flow rate was 1.0 milliliters / minute.

[0065] Calibration of the GPC column set is performed with 21 narrow molecular weight distribution polystyrene standards ranging from 580 to 8,400,000 molecular weights, arranged in six "cocktail" mixtures with at least 10-fold intervals between each molecular weight. Standards are purchased from Agilent Technologies. Polystyrene standards are prepared in 0.025 grams in 50 milliliters of solvent for molecular weights of 1,000,000 and above, and 0.05 grams in 50 milliliters of solvent for molecular weights below 1,000,000. The polystyrene standards are dissolved at 80 degrees Celsius with gentle agitation for 30 minutes. The peak molecular weights of the polystyrene standards are converted to polyethylene molecular weights using Equation 1 (as described in Williams and Ward, J. Polym. Sci., Polym. Let., 6, 621 (1968)): M ポリエチレン =A×(M ポリスチレン ) B (Equation 1) where M is the molecular weight, A has a value of 0.4315, and B is equal to 1.0.

[0066] A fifth order polynomial is used to fit each of the polyethylene equivalent calibration points. A small adjustment (approximately 0.375 to 0.445) is made to A to correct for column resolution and band broadening effects such that the linear homopolymer polyethylene standard is obtained at 120,000 Mw.

[0067] A total plate count of the GPC column set is performed using decane (prepared in TCB (0.04 g in 50 milliliters) and dissolved with gentle stirring for 20 minutes). Plate count (Equation 2) and symmetry (Equation 3) are measured with a 200 microliter injection according to the following equations:

[0068]

number

[0069]

number

[0070] Samples are prepared semi-automatically using PolymerChar "Instrument Control" software where the target sample weight is 2mg / ml and the solvent (containing 200ppm BHT) is added via the PolymerChar high temperature autosampler to a septa capped vial that has been pre-nitrogen sparged. Samples are dissolved at 160 degrees Celsius for 2 hours under "slow" shaking.

[0071] Calculations of Mn(GPC), Mw(GPC) and Mz(GPC) are based on GPC results using PolymerChar GPCOne™ software, the internal IR5 detector (measurement channel) of the PolymerChar GPC-IR chromatograph according to Equations 4-6 using baseline-subtracted IR chromatograms at each equally spaced data collection point (i) and the polyethylene equivalent molecular weight obtained from a narrow standard calibration curve of point (i) from Equation 1. Equations 4-6 are as follows:

[0072]

number

[0073] To monitor deviations over time, a flow rate marker (decane) is introduced into each sample via a micropump controlled by the PolymerChar GPC-IR system. This flow rate marker (FM) is used to linearly correct the pump flow rate (flow rate (apparent)) of each sample by aligning the RV of the respective decane peak in the sample (RV(FM sample)) with the RV of the decane peak in the narrow standard calibration (RV(FM calibrated)). Any change in time of the decane marker peak is then assumed to be related to a linear shift in flow rate (flow rate (effective)) throughout the run. To facilitate the highest accuracy of the RV measurement of the flow rate marker peak, a least-squares fitting routine is used that fits the peaks of the flow rate marker concentration chromatogram to a quadratic equation. The first derivative of the quadratic equation is then used to solve for the true peak position. After calibrating the system based on the flow rate marker peak, the effective flow rate (with respect to the narrow standard calibration) is calculated as in Equation 7: Flow Rate (effective) = Flow Rate (apparent) * (RV(FM calibrated) / RV(FM sample)) (Equation 7). Processing of flow marker peaks is performed via PolymerChar GPCOne™ software. Acceptable flow corrections are those where the effective flow rate is within + / - 0.7% of the apparent flow rate.

[0074] experiment Commercially available polymers are shown in Tables 1 and 2. Additives are listed below these tables.

[0075] [Table 1] * For AFFINITY Grades 1900 and 1950, the equation "Melt Index = [3.6126(10 (log(η)-6.6928) / -1.1363) Note that the formula "Melt Viscosity at 350° F. -9.3185" can be used to calculate the melt index (2.16 kg, 190° C.), where η (cP or MPa·s) = melt viscosity at 350° F. (177° C.). Melt Index = I2. See U.S. Pat. No. 7,199,180, Table 1, footnotes.

[0076] [Table 2] Note that propylene wt%=100%-(ethylene wt%+ENB wt%). * The lowest Mooney Viscosity (100°C) EPDM grade currently commercially available as of the filing date of this application. ** Mooney measured at 100°C.

[0077] Paraffin-based oils, such as those manufactured by GP Petroleum.

[0078] Carbon Black N-550, available from Cabot.

[0079] Carbon Black N-774, available from Cabot.

[0080] Calcium carbonate (CaCO 3 ) filler, available from Omya.

[0081] PEG4000 - Processing aid (polyethylene glycol), available from Sinoreagent, China.

[0082] 2-Mercaptobenzothiazole (RHENOGRAN MBT-80) - Hardener, available from Rhein Chemie.

[0083] RHENOGRAN S-80 - Hardener, available from Rhein Chemie.

[0084] RHENOGRAN ZDEC-80 - Curing accelerator, available from Rhein Chemie.

[0085] Stearic Acid - hardening activator and processing aid, available from Loxiol.

[0086] ZnO-powder-curing activator, available from Silox.

[0087] Kezadol GR-CaO Granules - Desiccant, available from Kettlitz.

[0088] CBS-Powder-Delayed Action Accelerator, available from Lanxess Rubber Chemicals.

[0089] RHENOGRAN DPTT-75 - Curing accelerator, available from Rhein Chemie.

[0090] MIKROFINE-ADC Powder - Available from HPL Additives. Azodicarbonamide.

[0091] Sample preparation The compositions of the present invention and comparative compositions are listed in Table 3.

[0092] [Table 3]

[0093] Preparation of Compositions - Representative Procedures A sequential mixing procedure was used to mix each of the compositions shown in Table 3 above. The initial mixing temperature was 50°C. For composition 1 of the present invention (Inv.1), NORDEL 6530 XFC EPDM was masticated for 30 seconds, then AFFINITY GA 1900 was added, and the resulting mixture was masticated for an additional 30 seconds (Bainite mixer, 1.6 liter internal mixer). The fill ratio was 0.75 (Bainite mixing chamber). Stearic acid, ZnO, oil (1 / 2 the total amount), carbon black (2 / 3 the total amount), and white filler were then added, and the resulting mixture was mixed at 50 RPM for 60 seconds (in the Bainite mixer). PEG was then added, as well as the remaining oil and carbon black, and the mixture was mixed at 50 RPM for an additional 80 seconds. The mixing equipment was then rammed up, swiped, and washed, and the filler on the ram was returned to the mixer chamber (1.6 liter). Mixing continued until the mixture reached a temperature of 120°C. The mixture was unloaded onto a tray and mixing continued on a 6" temperature controlled two roll mill (Bharaj Machinery). It was sheeted into a "0.5" thick" blanket and held at room temperature for 12 hours to improve polymer filler interaction (networking). All of the remaining additives including the expansion agent and CaO were thoroughly mixed into the blanket and sheeted into a "0.5" thick" blanket on a temperature controlled two roll mill. After 1 hour at room temperature, the rheology and other properties of the uncured composition (blanket or sheet) were measured. The results are shown in Table 4 below.

[0094] result The optimal cure properties for injection molding of complex parts, such as complex profiles, are: a) low tc90 values ​​for fast cure speed and short product cure time, b) high MH and "MH-ML" values ​​for higher crosslink density, c) low ML values ​​for better composition flow in the mold, and d) a fairly low ts2 value to reduce the possibility of scorching. With regard to the viscosity of the composition, a lower Mooney value is preferred to ensure complete filling of the mold. To reduce the variability of the test results, for each composition, only the polymer variation was changed and the amount of each additive was kept constant, as seen in Table 3. Compositions 1-4 of the present invention result in better complex profiles compared to the comparative compositions.

[0095] Comparative compositions A-C had Mooney values ​​of 11 MU, 15 MU, and 13 MU, respectively. Such high Mooney values ​​result in poor processability and underfilling of the mold (i.e., poor flow of the composition in the mold). Compositions 1-4 of the present invention and comparative composition D had Mooney values ​​of 7.3 MU, 8.0 MU, 7.3 MU, 7.2 MU, and 8-10 MU, respectively, and were able to fill complex molds. The comparative compositions also had high ML values ​​compared to the compositions of the present invention, indicating poorer flow of the composition in the mold.

[0096] Inventive compositions 1-4 had significantly lower tc90 values ​​(1.74 min, 1.85 min, 1.80 min, 1.87 min) compared to comparative composition D (2.12 min), indicating that the inventive compositions had a faster cure rate than the comparative composition. Inventive compositions 1-4 also had higher MH values ​​(5.80 Nm, 5.20 Nm, 5.95 nm, 6.88 nm) and higher "MH-ML" values ​​(5.55 Nm, 4.82 Nm, 5.65 Nm, 6.73) compared to comparative composition D (MH=4.36 Nm, "MH-ML"=3.86 Nm). These results indicate a higher degree of crosslinking in the inventive compositions, which in turn results in parts with better mechanical strength and properties. As mentioned above, the inventive compositions also had lower ML values ​​due to better composition flow in the mold.

[0097] The scorch times (ts2) at 180° C. were 1.14 and 1.18 minutes, respectively, and the tc90 times were 1.74 and 1.80 minutes, respectively, for inventive compositions 1 and 3. The short tc90 and ts2 values ​​of these compositions indicate a high cure rate at 180° C. (or higher) and a low likelihood of scorching, and therefore a better surface finish in injection molded parts.

[0098] A composition has been discovered that provides optimal viscosity and cure properties for complex injection molded parts. As shown by the viscosity and cure data, the composition of the present invention provides high flow rates and fast cure rates for complex injection molded parts of good quality and strength, as well as increased productivity.

[0099] [Table 4]

Claims

1. At least the following ingredients: a) at least one ethylene / alpha-olefin / non-conjugated polyene interpolymer having a Mooney viscosity (ML1+4, 125°C) of 10 to 40; and b) at least one ethylene / alpha-olefin interpolymer having a melt viscosity at 177° C. of 50,000 mPa·s or less; A composition comprising: The composition has a Mooney viscosity (ML1+4, 100°C) of 6.0 to 10.

2. 10. The composition of claim 1, wherein said at least one interpolymer of component a has a Mooney viscosity (ML1+4 at 125°C) of 18 to 32.

3. The composition of claim 1, wherein the at least one interpolymer of component a has a density from 0.860 g / cc to 0.910 g / cc.

4. 10. The composition of claim 1, wherein said at least one interpolymer of component a is EPDM.

5. 10. The composition of claim 1, wherein the at least one interpolymer of component b has a melt viscosity (177°C) of 5,000 mPa·s to 24,000 mPa·s.

6. 10. The composition of claim 1, wherein said at least one interpolymer of component b has a melting point (Tm) of from 64°C to 74°C.

7. The composition of claim 1, wherein said at least one interpolymer of component b is an ethylene / alpha-olefin copolymer.

8. 10. The composition of claim 1 having a Mooney viscosity (ML1+4 at 100°C) of 6.8 to 8.

5.

9. 10. The composition of claim 1, wherein the ratio of the density of said at least one interpolymer of component a to the density of said at least one interpolymer of component b is from 0.970 to 1.

00.

10. The composition of claim 1 further comprising one or more fillers (component d).

11. The composition of claim 1 further comprising at least one crosslinking agent.

12. The composition of claim 1 further comprising a leavening agent.

13. After heat treatment at a temperature of 180°C, ＊ m / min ~ 5.0dN ＊ 2. The composition of claim 1, having a [(MH-ML) / tc90] value of m / min.

14. An article comprising at least one component formed from the composition of any one of claims 1 to 13.

15. A process for forming a crosslinked composition comprising heat treating the composition of any one of claims 1 to 13.